JP7635525B2 - Ziplock paper container - Google Patents

Description

This disclosure relates to paper containers with zippers, and in particular to paper containers that have a three-dimensional shape and are self-supporting, and to a paper container with zippers that can be opened and closed repeatedly and stably.

Conventionally, technology such as that disclosed in Patent Document 1 has been disclosed as a paper container with a zipper. That is, a zipper is provided on the top of a rectangular parallelepiped paper container, and the zipper can be opened when the contents are to be removed, and closed when the contents have been removed.

The above technology can protect the contents and prevent them from spilling when the paper container falls over. Also, because it is a paper container, it is easy to reduce the volume of the container and dispose of it after the contents have been consumed. Figure 1 shows a blank plate 81 used to manufacture a paper container 80 with a zipper according to the prior art, Figure 2 shows an oblique view of the paper container 80 with a zipper according to the prior art, and Figure 3 shows an oblique view of the paper container with a zipper with the top open.

Unless otherwise specified, the front wall panel 831b is the front and FIG. 2 is used to refer to the front, back, left, right, top, and bottom sides of the zippered paper container 80. The same applies to the zippered paper container 90 of the present disclosure.

Furthermore, reference numbers used in describing the prior art are in the 80s or 800s to distinguish them from the present disclosure.
The subscript a of the symbol indicates an element on the back side of the resealable paper container 80, and the subscript b indicates an element on the front side. For elements having both the subscripts a and b, the symbol without a subscript includes both a and b.

In the case of the zippered paper container 80 described in Patent Document 1, when the top 871 is opened and the contents are shaken out, first the protruding portion (ear) 874 on the top surface is removed from the body 872, then the easy-open processing line 851 is cut, and then the zipper tape 861 is opened to open the shake-out opening 856 (see Figure 3).
Then, the zippered paper container 80 is lifted and tilted to shake out the contents.

When the front wall panel 831 of the zippered paper container 80 is tilted downwards to shake out the contents, the contents slide along the front top panel 833b and the inner surface of the front upper overlapping plate 834b, pass through the front zipper tape 861b, and are discharged from the edge of the lower side of the shaking opening 856 (the blank plate 81b of the front side). At that time, the contents may adhere to the front zipper tape 861b, which may prevent the zipper tape 861 from re-fitting. In particular, there have been cases where the zipper tape 861 is prevented from re-fitting when the contents are powder or highly viscous liquids.

JP 2005-178833 A

The present disclosure has been made to solve the above problems, and its objective is to provide a paper container 90 with a zipper in which the zipper tape 61 can be opened and closed repeatedly with sustained stability.

<Claim 1>
The above problems can be solved by the following embodiments of the present disclosure.
That is, the zippered paper container 90 of the present disclosure has:
In a paper container 90 with a zipper, a front blank plate 10b and a back blank plate 10a are joined together, each of which is made of a laminated sheet 78 based on paper.
A top portion 71 is provided at the top of the zipper-equipped paper container 90, and includes an upper overlapping plate 34 formed by overlapping and joining the front blank plate 10b and the back blank plate 10a, and a top plate 33 connected to the lower side of the upper overlapping plate 34;
A top side plate 41 is connected to the left and right ends of the upper overlapping plate 34,
A top-side protrusion 74 is provided on both the left and right sides of the top portion 71;
A body portion 72 provided below the top portion 71;
A bottom portion 73 provided on the lower side of the body portion 72;
an upper seal portion 53 that crosses the upper edge portion 21 or the vicinity of the upper edge portion 21 of the upper overlapping plate 34 and the side plate 41 of the top portion;
a zipper tape 61 located below the upper seal portion 53 and extending across the upper overlapping plate 34 and the side plate 41 of the top portion;
A male zipper tape 61m constituting the zipper tape 61 is provided on either the front blank plate 10b or the back blank plate 10a,
A female zipper tape 61f constituting the zipper tape 61 is provided on the other of the front blank plate 10a or the back blank plate 10b,
The blank plate 93 having the male zipper tape 61m is characterized by having a specific marking thereon.

<Claim 2>
In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure,
The specific indication may indicate that the male zipper tape 61m is on the lower side.

<Claim 3>
In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure,
The specific indication may indicate that the female zipper tape 61f is on the upper side.

<Claim 4>
In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure,
The blank plate 93 on which the male zipper tape 61m is provided may be provided with an opening sharp edge 19.

<Claim 5>
In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure,
At least one of the upper overlapping plate 34 and/or the top plate 33, which are part of the blank plate 93, may be provided with an opening sharp line 19 extending vertically in the longitudinal direction of the zippered paper container 90.

<Claim 6>
In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure,
The blank plate 93 on which the male zipper tape 61m is provided may be provided with an opening assistance line 55.

<Claim 7>
In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure,
An opening auxiliary line 55 may be provided at least on the upper overlapping plate 34, and/or the side plate 41 of the top, and/or the top panel 33, and/or the top side protruding portion (ear portion) 38 connected to the left and right sides of the top panel 33.

According to the embodiment of the present disclosure described above, a paper container 90 with a zipper is provided that can reduce the amount of contents adhering to the zipper tape 61, and thus can maintain stable repeated opening and closing of the zipper tape 61.

1 is a development view of a blank plate 81 used in manufacturing a paper container 80 with a zipper according to the prior art. FIG. 1 is a perspective view of a resealable paper container 80 according to the prior art. 1 is a perspective view of a conventional paper container 80 with a zipper with a top portion 71 open. FIG. 1 is a development view of a blank plate 93 used in manufacturing a zippered paper container 90 according to the first embodiment of the present disclosure. FIG. 5 is a front view showing the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced using the blank plate 93 shown in FIG. 4. FIG. 5 is a perspective view showing the shape of a paper container (standing state) 92 at an intermediate stage when a paper container 90 with a zipper is produced using the blank plate 93 shown in FIG. 4. FIG. 5 is a perspective view of a paper container 90 with a zipper produced using the blank plate 93 shown in FIG. 4. FIG. 8 is a side view of the zippered paper container 90 shown in FIG. 7 . FIG. 8 is a plan view of the zippered paper container 90 shown in FIG. 7 . 8 is a perspective view of the zippered paper container 90 shown in FIG. 7 with a top portion 71 open, as viewed from the front. 8 is a perspective view of the back of the zipper-equipped paper container 90 shown in FIG. 7 with the top portion 71 open. FIG. FIG. 1 is a cross-sectional view of a zipper tape of the present disclosure (prior art). FIG. 2 is a cross-sectional view of a laminated sheet of blank plates of the present disclosure (prior art). 1 is a cross-sectional view of a zip tape joint portion of a prior art; FIG. 2 is a cross-sectional view of a zip tape interface portion of the present disclosure. FIG. 13 is an explanatory diagram of the zipper tape with the contents attached thereto immediately after the contents are shaken out. FIG. 1 is an explanatory diagram of a zipper tape with contents attached thereto before the zipper tape is refastened. 13 is a development view of a blank plate 93 used in manufacturing a zippered paper container 90 according to a second embodiment of the present disclosure. FIG. 19 is a front view showing the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced using the blank plate 93 shown in FIG. 18. FIG. 19 is a perspective view of a paper container 90 with a zipper produced using the blank plate 93 shown in FIG. 18. FIG. 19 is a plan view of the zippered paper container 90 shown in FIG. 18. 19 is a perspective view of the zippered paper container 90 shown in FIG. 18 with the top open, seen from the front. 13 is a development view of a blank plate 93 used in manufacturing a chuck-equipped paper container 90 according to a third embodiment of the present disclosure. FIG. 24 is a perspective view of a zippered paper container 90 made using the blank plate 93 shown in FIG. 23 with the top open, as viewed from the front. 25 is a perspective view of the zippered paper container 90 of FIG. 24 with text displayed on the front top panel 33, with the top open, as viewed from the front. FIG. 13 is a development view of a blank plate 93 used in manufacturing a zippered paper container 90 according to the second embodiment and variant 1 of the third embodiment of the present disclosure. FIG. 13 is a development view of a blank plate 93 used in manufacturing a zippered paper container 90 according to the second embodiment and variant 2 of the third embodiment of the present disclosure. FIG. 13 is a development view of a blank plate 93 used in manufacturing a zippered paper container 90 according to the second embodiment and variant 3 of the third embodiment of the present disclosure. FIG. 13 is a development view of a blank plate 93 used in manufacturing a zippered paper container 90 according to the second embodiment and variant 4 of the third embodiment of the present disclosure. FIG. 13 is a development view of a blank plate 93 used in manufacturing a zippered paper container 90 according to a fourth embodiment of the present disclosure. FIG. 13 is a development view of a blank plate 93 used in manufacturing a zippered paper container 90 according to a fifth embodiment of the present disclosure. FIG. 13 is a development view of a blank plate 93 used in manufacturing a zippered paper container 90 according to a sixth embodiment of the present disclosure. FIG.

The present disclosure will be described below with reference to the drawings, however, the present disclosure is not limited to the specifically illustrated embodiments or various specifically described structures.
In each drawing, the size and ratio of the components may be changed or exaggerated for ease of understanding, and parts that are unnecessary for the explanation or repeated reference numerals may be omitted for ease of viewing.

The numerical values such as dimensions of each component and the names of materials described in this specification are merely examples of embodiments, and are not intended to be limiting, and may be selected and used as appropriate. In this specification, terms specifying shapes or geometric conditions, such as parallel, orthogonal, vertical, center, etc., are intended to include substantially the same state in addition to their strict meanings.

The blank plate 93 of the paper container with a zipper 90 of the present disclosure is formed into a rectangular shape using a laminated sheet 78 in which at least a base paper is laminated and at least a thermo-adhesive resin such as polyethylene is laminated as the innermost layer, and the blank plate 93 is configured with various folding lines to separate the forming plates for each part required for forming the paper container with a zipper 90.

First Embodiment
<Blank board>
The blank plate 93 of the chuck-equipped paper container 90 of the first embodiment of the present disclosure is shown in Fig. 4. Fig. 4(a) shows the back blank plate 10a, and Fig. 4(b) shows the front blank plate 10b. The back blank plate 10a and the front blank plate 10b are collectively referred to as the blank plate 93.

Unless otherwise specified, in each component of the blank plate 93 described below, the subscript "a" of each symbol indicates an element of the back blank plate 10a, and the subscript "b" indicates an element of the front blank plate 10b. In elements with both the subscripts "a" and "b", the symbol without a subscript includes both "a" and "b".

The rear upper edge 21a, which is the lower side of the rear blank plate 10a in the drawing of FIG. 4(a), becomes the upper side of the paper container 90 with a zipper.
The front upper edge portion 21b, which is the upper side of the front blank plate 10b in the drawing of FIG. 4(b), becomes the upper side of the paper container 90 with a zipper.

In both Figures 4(a) and (b), the front side of the drawing corresponds to the outer side when the resealable paper container 90 is assembled, and the back side corresponds to the inner side.
Figures 4(a) and (b) are symmetrical with respect to the respective upper edges 21a and 21b, and when the inner surfaces of the back blank plate 10a and the front blank plate 10b are aligned and overlapped, each component (the forming plates, lines, sealing portions, zipper tape joints, etc. described below) overlap.

The back blank plate 10a and the front blank plate 10b are aligned and stacked, and then joined together to produce an intermediate stage paper container with a zipper (flat state) 91 as shown in FIG. 5, and then an intermediate stage paper container with a zipper (raised state) 92 as shown in FIG. 6 is produced, and the process proceeds to complete the paper container with a zipper 90; this manufacturing method will be described later.

Unless otherwise specified, the top, bottom, left and right of the front blank plate 10b will be shown with reference to Figure 4(b). The back blank plate 10a will also be described with its upper edge 21a as the top side. Therefore, the top and bottom are reversed in Figure 4(a).
In the case of the paper container 90 with a zipper, the upper edge 21 side is the upper side, and the lower edge 26 side is the lower side.

The formed resealable paper container 90 is composed of a top portion 71, a body portion 72, and a bottom portion 73, which will be described later. The top portion may be referred to as the top portion, and the bottom portion may be referred to as the bottom portion (see FIG. 7).
In addition, when describing the up-down direction of each component provided on the top portion 71, the term "top side" may refer to the upper edge portion 21 side, and when describing the up-down direction of each component provided on the bottom portion 73, the term "bottom side" may refer to the lower edge portion 26 side.

As described above, the rear blank plate 10a and the front blank plate 10b have vertically symmetrical shapes, so the blank plate 93 will be described with reference to the front blank plate 10b.
As long as there is no change in function, the rear blank plate 10a and the front blank plate 10b may not be symmetrical.
The rear blank plate 10a and the front blank plate 10b are also made of the same material (layer structure) and are manufactured by the same method.

The front blank plate 10b of the zippered paper container 90 of this embodiment is formed into a substantially rectangular shape using a laminated sheet 78 in which at least a base paper is laminated and at least a thermo-adhesive resin such as polyethylene is laminated as an innermost layer. With reference to Fig. 4(b), the upper side is the upper edge portion 21b, the left and right sides are the front side edge portions 11b, and the lower side is the lower edge portion 26b.
The front blank plate 10b has a shape that is symmetrical with respect to a vertical line passing through the center of the front blank plate 10b in the width direction.
The laminated sheet 78 will be described later.

The front blank plate 10b is provided with, in the longitudinal direction from the left, a front first vertical folding line 12b, a front second vertical folding line 13b, a front second vertical folding line 13b, and a front first vertical folding line 12b.
That is, the vertical folding line closer to the front side edge 11b of each front blank plate 10b is the front first vertical folding line 12b, and the vertical folding line farther from the front side edge 11b of each front blank plate 10b is the front second vertical folding line 13b.
It is preferable that each of these front longitudinal fold lines 12b, 13b is substantially parallel to the side edge portion 11b of the front blank plate 10b.

In addition, the front blank plate 10b is provided with, in the transverse direction from the front upper edge portion 21b, a front first horizontal fold line 22b, a front second horizontal fold line 23b, a front third horizontal fold line 24b, and a front fourth horizontal fold line 25b, in that order.
It is preferable that the front side horizontal fold lines 22b, 23b, 24b, 25b are each substantially parallel to the upper edge 21b and the lower edge 26b.

Furthermore, a pair of diagonal fold lines 17b on the top of the front side and a pair of diagonal fold lines 18b on the bottom of the front side are provided on the left and right sides, and the forming plates for each part required to form the zippered paper container 90 are divided and configured.

The upper end of the front top diagonal folding line 17b is at the same position as the front first top intersection point Eb, which is the intersection point of the front first vertical folding line 12b and the front first horizontal folding line 22b.
The lower end of the front top diagonal fold line 17b is at the same position as the front second top intersection point Fb, which is the intersection point of the front second vertical fold line 13b and the front second horizontal fold line 23b.

The upper end of the front bottom diagonal fold line 18b is at the same position as the front second bottom intersection point Hb, which is the intersection point of the front second vertical fold line 13b and the front third horizontal fold line 24b.
The lower end of the front bottom diagonal fold line 18b is at the same position as the front first bottom intersection point Gb, which is the intersection point of the front first vertical fold line 12b and the front fourth horizontal fold line 25b.

The oblique folding lines 17b on the front side may be located near the intersections Eb and Fb without contacting them. Furthermore, the oblique folding lines 18b on the front side may be located near the intersections Gb and Hb without contacting them.
By positioning each of the above-mentioned front diagonal folding lines and each intersection point in close proximity without touching each other, it is possible to maintain sufficient folding performance while preventing excessive concentration of folding lines at any particular location, thereby preventing a decrease in the strength of the laminated sheet of the front blank plate 10b.

On both the left and right side edges 11b of the front blank plate 10b, a front edge seal margin 36b is formed via the first front vertical fold line 12b.

In addition, the front bottom edge 26b located below the front blank plate 10b has a front bottom seal margin 37b formed at the front fourth horizontal fold line 25b.

In addition, the front blank plate 10b has forming plates for each part provided downward from the front upper edge 21b, which is located at the top.

Regarding the main parts, a front upper overlapping plate 34b is provided below the front upper edge 21b. A front top panel 33b is connected to the bottom of the front upper overlapping plate 34b via a front first horizontal fold line 22b. A front wall panel 31b is connected to the bottom of the front top panel 33b via a front second horizontal fold line 23b. A front bottom panel 35b is connected to the bottom of the front wall panel 31b via a front third horizontal fold line 24b.

Also, the side panels 41b of the top of the front side are connected to the outside of both the left and right sides of the front side upper overlapping panel 34b via the second vertical folding line 13b of the front side.

Furthermore, on both the left and right sides of the front top panel 33b, a front top protrusion (ear) margin 38b is connected via the front second vertical fold line 13b.

Furthermore, the front side panel 32b is connected to the outside of both the left and right sides of the front wall panel 31b via the front second vertical fold line 13b.

Furthermore, on both the left and right sides of the front bottom panel 35b, a front bottom protrusion (ear) portion 43b is connected via the front second vertical fold line 13b.

Furthermore, the top protrusion (ear) portion 38b is connected to the bottom of each top side panel 41b via the first horizontal fold line 22b. The side panel 32b is connected to the bottom of the top protrusion (ear) portion 38b via the second horizontal fold line 23b. The bottom protrusion (ear) portion 43b is connected to the bottom of the side panel 32b via the third horizontal fold line 24b.

The bottom seal portion 37 is connected to the bottom of the front bottom panel 35b and the bottom protrusions (ears) 43 on both the left and right sides.

The above-mentioned side plate 41b of the top of the front side, the protruding portion (ear) portion 38b of the top of the front side, the side plate 32b of the front side, and the protruding portion (ear) portion 43b of the bottom of the front side are connected to the left and right outer sides by the first vertical fold line 12b of the front side and the seal portion 36b of the side of the front side.

In this embodiment, the process of adding fold lines to the blank plate 93 (creasing process) is performed after the laminated sheet 78 is completed, and then the laminated sheet 78 is supplied to a machine that manufactures the chuck-equipped paper container 90. Alternatively, the creasing process may be performed by the machine that manufactures the chuck-equipped paper container 90.

As the method for forming the creasing lines, an appropriate method is adopted from among known methods such as a platen method and a rotary die method.
Also, the laminated sheet 78 may be cut into sheets before the scoring process is performed, or the laminated sheet 78 may be supplied to the scoring process in a roll form.

Next, a punching process for manufacturing blank plates 93 by punching the laminated sheet 78 will be described. For the punching process, an appropriate method is selected from known methods such as a platen method and a rotary die method. The blank plates 93 may be formed directly from the rolled laminated sheet 78, or the sheet may be cut into sheets and then punched.
The order of the creasing and punching processes does not matter. They may be done at the same time.

Alternatively, the rolled laminated sheet 78 slit to a predetermined roll width may be fed to a machine for manufacturing paper containers with zippers 90, and the rolled laminated sheet 78 may be cut in the transverse direction to produce blank plates 93.

The rear blank plate 10a is symmetrical to the front blank plate 10b and has the same shape. In other words, they are blank plates of the same shape but with the layer structure of the blank plate reversed.

Figure 5 is a front view showing the shape of a zippered paper container (flat state) 91 at an intermediate stage when manufacturing a zippered paper container 90 using the blank plate 93 shown in Figure 4. The topmost part is the front upper edge 21b of the front blank plate 10b shown in Figure 4(b), and on its back side is the back blank plate 10a. The back blank plate 10a cannot be seen with the naked eye, but when viewed through it, it has approximately the same shape as the front blank plate 10b.

In FIG. 5, the back blank plate 10a and the front blank plate 10b overlap, and each component has the same positional relationship when viewed through the drawing, within the range of manufacturing variations, so the notation and suffixes for the front side may be omitted in the explanation.

At a predetermined position where the two blank plates overlap each other, the upper overlapping plate 34 and the side plate 41 of the top surface of the front side are provided with an upper seal portion 53 as a transverse sealing means and a zipper tape joint portion 52, which are provided in sequence from the upper edge portion 21.

The upper seal portion 53 is provided at or near the upper edge 21 of the upper overlapping plate 34 and each of the top side plates 41 .
When the upper seal portion 53 is approximately parallel to the upper edge portion 21, the length of the upper seal portion 53 can be shortened, and no waste is generated in the blank plate 93.

The upper seal portion 53, which serves as a transverse sealing means, is formed by joining the opposing front-side upper seal portion 53b and back-side upper seal portion 53a. The joining is performed across the entire width of the upper edge portion 21 of the chuck-equipped paper container 90 or the vicinity of the upper edge portion 21, so that the chuck-equipped paper container 90 remains airtight.

Additionally, it is desirable that the upper seal portion 53 be approximately parallel to the upper edge portion 21. Furthermore, it is desirable that the zipper tape joint portion 52 be approximately parallel to the upper edge portion 21.
In such a configuration, it is easy to open and close the zipper tape 61 and to remove the contents. Also, the length of the zipper tape 61 can be shortened.

<Easy-to-open processing line>
The easy-open processing line 51 will be described.
The upper overlapping plate 34 and the side plate 41 of the top portion may be provided with an easy-open processing line 51 as an opening means.
By providing the easy-open processing line 51, the zippered paper container 90 can be opened without using tools such as scissors.

Referring to FIG. 5, the easy-open processing line 51 runs from one side edge 11 to the other side edge 11 of the blank plate 93 and is located between the upper seal portion 53 and the zipper tape 61.

A notch 77 may be provided on either end of the easy-open processing line 51, and in this embodiment, the notch 77 is provided on the right side edge 11. The notch 77 may also be provided on the left side edge 11. Alternatively, notches 77 may be provided on both the left and right side edges 11. Providing the notch 77 makes initial opening easier.

By cutting the easy-open processing line 51 from one side edge (here, the right side) 11 to the other side edge (here, the left side) 11, the upper overlapping plate 34 and the side plate 41 of the top of the front side are cut across, and the upper seal portion 53 is also cut away, exposing the zipper tape 61.

When using an intermittent half-cut line or a straight half-cut line for the easy-to-open processing line 51 of the opening means, it may be formed using a normal blade method, but a half-cut line with greater precision and stability can be formed by using a method that uses laser light irradiation, a method that uses ultrasonic waves, or a method known as diamond cutting.

The easy-open processing line 51 may also be in the form of a strip having a certain width. In addition, multiple easy-open processing lines 51 may be provided.

Note that depending on the material, layer structure, and easy-open processing conditions of the laminated sheet 78 of the blank plate 93, the easy-open processing line 51 may not be provided. Even without the easy-open processing line 51, it may be possible to open the package by hand.

Furthermore, if the easy-open processing line 51 is not provided as described above, the container may be opened with a blade such as scissors. In that case, the intended opening line may be indicated by printing. The printing position may be the position of the easy-open processing line 51 shown in FIG. 5. The intended opening line may not be clearly indicated on the zippered paper container 90, but may be indicated in the attached instruction manual, etc.

<Zipper tape>
Fig. 12 is a schematic cross-sectional view showing an example of the configuration of a zipper tape 61 used in a paper container with zipper tape 90 of the present disclosure. The zipper tape 61 shown in Fig. 12(a) is a state before a male zipper tape 61m and a female zipper tape 61f are molded by extrusion molding, and are fitted together. The zipper tape 61 is composed of a male zipper tape body 62m provided with a convex male zipper tape fitting portion 63m and a female zipper tape body 62f provided with a concave female zipper tape fitting portion 63f.

The zipper tape 61 is formed by extrusion molding of a thermoplastic resin, but it may also be multi-layered by extrusion molding using resins suited to the performance requirements of each component of the zipper tape 61 (zipper tape body 62, zipper tape fitting portion 63, etc.).

The material of the side of the zipper tape body 62 that is joined to the blank plate 93 is preferably one with a low melting point since it will be heat-sealed, but the side of the zipper tape body 62 that is not joined to the blank plate 93 or the part that is not in contact with the outer surface (the inner layer) may be heat-resistant enough to withstand the heat sealing temperature.

Examples of the former low melting point material include low density polyethylene (LDPE) and linear low density polyethylene (LLDPE). Examples of the latter heat resistant material include medium density polyethylene (MDPE), high density polyethylene (HDPE) and polypropylene (PP).

Furthermore, since the male zipper tape fitting portion 63m does not need to deform when fitting with the female zipper tape fitting portion 63f, it may be harder than the female zipper tape fitting portion 63f (hardness depends on the material and shape).
Examples of the material of the male zipper tape fitting portion 63m include low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), and polypropylene (PP).

The male zipper tape 61m and the female zipper tape 61f, which are extruded separately, are fitted together at their respective male zipper tape fitting portions 63m and female zipper tape fitting portions 63f, as shown in FIG. 12(b), to complete the zipper tape 61.

<Zipper tape joining procedure>
The procedure for assembling the zippered paper container 90 will be described later, but here, the procedure for joining the zipper tape 61 will be described.

In this case, the zipper tape joint 52 is the intended joint for the zipper tape 61 when assembling the zippered paper container 90.

The rear blank sheet 10a and the front blank sheet 10b are overlapped, and the side edge seal margins 36 are heat-sealed to each other, and the upper seal portions 53 are heat-sealed to each other.
At this time, the zipper tape 61, in which the male zipper tape 61m and the female zipper tape 61f have been previously fitted at their male zipper tape fitting portions 63m and female zipper tape fitting portions 63f, is inserted into this portion, and at the same time, the zipper tape joint portions 52 of the two blank sheets 93 are heated and pressurized from the outer surfaces thereof. Then, the blank sheets 93 and the zipper tapes 61 are heat-sealed.

The method of joining the zipper tape 61 to the blank plate 93 is not limited to heat sealing as described above, and may be other methods such as adhesive or adhesive tape.

In this example, the male zipper tape 61m is the front zipper tape 61b and the female zipper tape 61f is the back zipper tape 61a, but the male zipper tape 61m may be the back zipper tape 61a and the female zipper tape 61f may be the front zipper tape 61b.

By heat sealing the zipper tape 61 in this manner, there is less misalignment of the heat seal compared to a method in which the male zipper tape 61m and the female zipper tape 61f are separately heat sealed to the zipper tape joint 52, and the attachment process is simplified, allowing the zipper tape 61 to be attached with high production efficiency.

<Laminated sheet of blank plates>
As described above, the laminated sheet 78 used for the blank plate 93 is a laminated sheet 78 having at least a paper base layer 782 laminated thereto, and at least the innermost thermoplastic resin layer 783 made of a thermoplastic resin such as polyethylene, but if necessary, the intermediate layers may be provided with a barrier layer 785 against water vapor, oxygen, or other substances, or a strength-enhancing layer.

When providing a printed layer such as a pattern on the zippered paper container 90 of this embodiment, the pattern is usually printed on the surface of the paper base layer 782. However, if the paper base layer 782 is not suitable for printing, a printed layer such as a pattern can be provided on, for example, a biaxially oriented polyethylene terephthalate film, and the film can be laminated to one of the outer layers of the paper base layer 782.

The paper base layer 782 is preferably made of paper that is rigid and does not easily crack when folded along a folding line, but there are no particular limitations and an appropriate paper can be selected and used depending on the contents to be filled into the zippered paper container 90, taking into consideration water resistance (sizing degree) and other factors.
As specific examples, fine paper, bleached kraft paper, cup base paper, milk carton base paper, etc. can be suitably used, and the appropriate basis weight is in the range of 80 to 320 g/ ^m2 .

The resins that can be used for the innermost layer, and, if necessary, the outermost layer and the intermediate thermal adhesive resin layer (sealant layer) include low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), ethylene-α-olefin copolymers polymerized using a single-site catalyst, ethylene-vinyl acetate copolymers (EVA), ethylene-acrylic acid copolymers (EAA), ethylene-methacrylic acid random copolymers (EMAA), ethylene-methyl acrylate copolymers (EMA), ethylene-ethyl acrylate copolymers (EEA), ionomers, polypropylene and its copolymers, polyester resins, etc., and from these, the most suitable one can be selected and used depending on the contents to be filled and the conditions of storage and use.

Among the above heat-adhesive resins, ethylene-methyl acrylate copolymer (EMA) and ethylene-methacrylic acid random copolymer (EMAA) are particularly excellent in terms of thermal stability during processing such as extrusion coating, adhesion to various substrates, low-temperature heat sealability, and thin-film formability. Therefore, it is easy to extrusion coat and laminate the outermost heat-adhesive resin layer, which does not require a large thickness, at a relatively thin thickness of, for example, 6 to 10 μm, and this allows the proportion of plastic material used to be reduced while also providing cost benefits.

The above-mentioned innermost layer, and optionally the outermost layer, of the thermally adhesive resin layer can be laminated by extrusion coating the resin on the laminated surface after subjecting it to an easy-adhesion treatment such as anchor coating, corona treatment, or flame (flame) treatment as required, or the thermally adhesive resin can be formed into a film in advance and laminated by bonding the film together using a known dry laminate or extrusion laminate (sandwich laminate) method.

When the barrier layer 785 is laminated on the intermediate layer of the laminated sheet 78, the barrier layer 785 may be a metal foil such as aluminum foil, or a deposition film in which a metal or inorganic oxide such as aluminum, silica, or alumina is deposited to a thickness of 20 to 100 nm on a substrate film such as a biaxially oriented polyethylene terephthalate film (hereinafter, PET film), a biaxially oriented nylon film (hereinafter, ON film), or a biaxially oriented polypropylene film (hereinafter, OPP film). Alternatively, a saponified ethylene-vinyl acetate copolymer film (hereinafter, EVOH film), a biaxially oriented nylon MXD6 film, a polyacrylonitrile film, or a PET film, ON film, or OPP film provided with a coating layer of polyvinylidene chloride may be used.

It is usually preferable to laminate such a barrier layer 785 on the inner surface of the paper base layer 782, since this allows the effective use of its barrier properties, but if a metal foil such as aluminum or a metal-deposited film is used for the barrier layer 785, it can also be laminated on the outer surface of the paper base layer 782, in order to utilize the metallic feel in the design. The barrier layer 785 can be easily laminated by known methods such as dry lamination or extrusion lamination (sandwich lamination).

The layer structure of the laminated sheet 78 of the blank plate 93 of the resealable paper container 90 of this embodiment is illustrated.
FIG. 13(a) is a cross-sectional view of a laminated sheet 78 of a blank plate 93 consisting of three layers. The layer structure is as follows:
Outermost thermoplastic resin layer 781 / Paper base material layer 782 /
Innermost thermoplastic resin layer 783
It consists of:

FIG. 13B is a cross-sectional view of a laminated sheet 78 of a blank plate 93 consisting of two layers. The layer structure is as follows:
Paper base layer 782 / innermost thermoplastic resin layer 783
This layer structure is obtained by removing the outermost thermoplastic resin layer 781 from the three-layer blank plate 93 shown in FIG.

In addition, when the blank plate 93 is required to have a barrier property (water vapor, oxygen, aroma retention, etc.), a barrier layer 785 can be provided. Fig. 13(c) is a cross-sectional view of a laminated sheet 78 of the blank plate 93 consisting of five layers, and the layer structure is as follows:
Outermost thermoplastic resin layer 781 / Paper base material layer 782 / Intermediate adhesive layer 784 /
Barrier layer 785 / innermost thermoplastic resin layer 783
It consists of:

FIG. 13D is a cross-sectional view of a laminated sheet 78 of a blank plate 93 consisting of four layers. The layer structure is as follows:
Paper base layer 782 / Intermediate adhesive layer 784 / Barrier layer 785 /
Innermost thermoplastic resin layer 783
It consists of:
This layer structure is obtained by removing the outermost thermoplastic resin layer 781 from the five-layer blank plate 93 shown in FIG. 13(c).

The layers of each laminate sheet 78 are bonded together by known methods such as dry lamination, extrusion coating, and adhesives. Note that the layers used for bonding the layers together are not shown because they are thin.

The laminated sheet 88 of the chuck paper container 80 of the prior art is similar to the laminated sheet 78 of the chuck paper container 90 of the present disclosure.
With reference to FIG. 13, there are an outermost thermoplastic resin layer 881 , a paper base layer 882 , an innermost thermoplastic resin layer 883 , an intermediate adhesive layer 884 , and a barrier layer 885 .

<Preparation of paper container with zipper>
Below is an overview of the steps taken to create an intermediate stage paper container with a zipper (flat state) 91 from a blank plate 93 of a paper container with a zipper 90, to create an intermediate stage paper container with a zipper (box-assembled state) 92, and finally to complete a package of paper container with a zipper 90 filled with contents.

<Preparation of intermediate stage paper container with zipper (flat state)>
When the two blank plates 10a, 10b are overlapped, the zipper tape 61, which has a male zipper tape 61m and a female zipper tape 61f already fitted together, is inserted into the position where the zipper tape joints 52 overlap, and the zipper tape joints 52 are heated and pressurized from the outer surface of the blank plate 93 to be heat-sealed.

Next, the inner faces of the upper seal portion 53 are heat sealed together, and the inner faces of the seal margins 36 of the side edges adjacent to the side edge portion 11 of the blank plate 93 are heat sealed together. In this way, the lower edge portion 26 is formed into a bag shape with an opening.

A notch 77 may also be provided at each end of the outer edge of the easy-open processing line 51 (at the points where the edge meets the side edges on both sides). Note that the notch 77 may also be provided at one of the ends.

The zippered paper container 90 is not particularly limited in its actual production, but to improve productivity, a machine that assembles the paper container, fills it with the contents, and seals each joint in-line may be used.

In this device, a long printed laminate sheet 78 wound up in a roll can be unwound, and in a format in which the paper containers are connected horizontally, folding lines can be processed, and zipper tape 61 can be inserted and heat sealed, the side edge seal margins 36 can be heat sealed, the upper seal portion 53 can be heat sealed, and notches 77 can be punched out.

However, the order of the steps may be different from that described above as long as the desired paper container 90 with a zipper is obtained.

Next, an intermediate stage paper container with a zipper (flat state) 91 as shown in FIG. 5 is produced by cutting into individual paper containers, and then it is molded into a three-dimensional shape to produce an intermediate stage paper container with a zipper (raised box state) 92 as shown in FIG. 7.

<Production of intermediate stage paper container with zipper (standing box state)>
A mandrel is inserted through the opening of the bottom 73 of this intermediate stage zippered paper container (flat state) 91, leaving the upper overlapping plate 34, and the lower top plate 33 is spread out front to back by the first horizontal fold line 22, and the upper overlapping plate 34 is raised upward.

Here, to ensure that the ridge 72d of the body 72 is bent, an auxiliary member may be brought into contact with the vicinity (including abutment) of the ridge 72d from the inner and/or outer sides of the body 72.

A top portion 71 formed by the top plate 33 is formed below the upper overlapping plate 34, followed by a body portion 72 having an approximately rectangular shape in horizontal cross section, and an intermediate stage paper container with a zipper (standing state) 92 is formed in which the bottom portion 73 opens in an approximately rectangular shape.
At this stage, the upper overlapping plate 34 stands upward as shown in FIG.

In the design, the horizontal cross-sectional shape of the body 72 and the shape of the opening of the bottom 73 are assumed to be rectangular, but because the zippered paper container 90 is made of a flexible laminated sheet 78 mainly made of paper, they are made approximately rectangular, even if they are not completely rectangular.

<Forming and filling paper containers with zippers>
Next, the upper overlapping plate 34 that stands upward is folded to the back side (towards the back top panel 33a) and laid down, and the top side protruding portions (ears) 74 that protrude on both the left and right sides are folded toward the side panel 32 and joined to the body portion 72.

The joining method may be a method using an adhesive (hot melt, etc.), a method using an adhesive tape, a method of mechanical joining (engagement, joining with a joining tool), etc. In addition, when a thermoplastic resin layer (sealant layer) is provided on the outermost layer of the blank plate 93, the thermoplastic resin layer may be heat-sealed.
A similar method is used for joining the bottom side projections (ears) 75 described later.

In addition, the tip of the top protrusion (ear) 74 may be joined to the body 72 of the zippered paper container 90.
In addition, a portion of the top side protruding portion (ear) 74 other than the tip may be joined to the body 72 of the zippered paper container 90. In that case, the tip of the top side protruding portion (ear) 74 does not need to be joined to the body 72 of the zippered paper container 90.

The bottom 73 of the intermediate stage zippered paper container (standing state) 92 formed as described above is turned up, the contents are filled through the open bottom 73, and then the bottom 73 is folded and the bottom seal margins 37 are heat sealed together in a palm-to-palm seal format.

Then, the bottom seal portion 37 is folded toward the back side (toward the back bottom panel 35a) and laid down, and the bottom protrusions (ears) 75 that protrude from both the left and right sides are folded toward the bottom panel 35 and joined, completing the packaging of the approximately rectangular shaped paper container with a zipper 90.

Figure 7 is a perspective view showing a first embodiment of a paper container with a chuck 90 of the present disclosure. Figure 8 is a side view of the paper container with a chuck 90 shown in Figure 7. Figure 9 is a plan view of the paper container with a chuck 90 shown in Figure 7.

The zipper-equipped paper container 90 shown in FIG. 7 has an outer shape formed into a substantially rectangular parallelepiped shape, and has a ridge portion 72d on its body portion 72.
In addition, the design assumes a rectangular shaped paper container 90 with a zipper, but since the paper container 90 with a zipper is made of a flexible laminated sheet 78 mainly made of paper, it is made to have an approximately rectangular shape, even if it does not have a perfect rectangular shape.

<Opening operation for shaking out the contents of a paper container with a zipper>
Fig. 10 is a perspective view of the front of the completed paper container 90 with a zipper, in which the top 71 is opened to shake out the contents. Fig. 11 is a perspective view of the back of the same paper container 90 with a zipper.

The easy-to-open processing line 51 is opened manually from a notch 77 provided on one side edge 11 (here, the right side) and is cut all the way to the other side edge 11 (here, the left side).

Next, the front side opening gripping area 57b between the front side easy-open processing line 51b and the front side zipper tape 61b, and the back side opening gripping area 57a between the back side easy-open processing line 51a and the back side zipper tape 61a are each grasped with a human hand, and the zippered paper container 90 is spread outward, thereby opening the zipper tape 61 exposed at the easy-open processing line 51.

During this opening operation of the zipper tape 61, the ends of the zipper tape 61 on the side edge 11 side of each blank plate 93 are opened over substantially the entire width up to the seal margins 36 on each side edge.
As described above, the male zipper tape 61m and the female zipper tape 61f of the zipper tape 61 are separated from each other, whereby the swing-out opening 56 is formed.

<Zipper tape properties and content release direction>
A cross-sectional view of a zipper tape 861 of the prior art is shown in Fig. 12. Fig. 12(a) shows a state in which the male zipper tape 861m and the female zipper tape 861f are separated from each other, while Fig. 12(b) shows a state in which the male zipper tape 861m and the female zipper tape 861f are engaged with each other.

The zipper tape 61 of the present disclosure has a similar shape to that described above, and will also be described with reference to Fig. 12. Regarding the reference numerals, the reference numerals for the zipper tape 861 of the prior art and the zipper tape 61 of the present disclosure are shown together.
A cross-sectional view of the zipper tape 61 of the present disclosure is shown in Fig. 12. Fig. 12(a) shows a state in which the male zipper tape 61m and the female zipper tape 61f are separated from each other, while Fig. 12(b) shows a state in which the male zipper tape 61m and the female zipper tape 61f are engaged with each other.

Figure 14(a) shows a cross-sectional view of a zipper tape joint portion in which the zipper tape 861 and the blank plate 81 are joined in the conventional technology, cut at the cross-sectional position A-A in Figure 5. Note that Figure 5 is a diagram showing a paper container (flat state) in an intermediate stage of the present disclosure, but is also used for the zipper tape 861 of the conventional technology to explain the cross-sectional position.

At this stage, the male zipper tape 861m and the female zipper tape 861f are in a mated state.
FIG. 14B is a cross-sectional view showing a state in which the male zipper tape 861m and the female zipper tape 861f are released from the state shown in FIG. 14A.

In FIG. 14(a), a front zipper tape 861b is joined to a blank plate 81b on the front side, and the front zipper tape 861b serves as a female zipper tape 861f.
Further, a back zipper tape 861a is joined to the back portion of the blank plate 81a, and in this figure, the back zipper tape 861a is a male zipper tape 861m.

15A and 15B show the zipper tape joint portion of this embodiment. In Fig. 15A, a front zipper tape 61b is joined to a front blank plate 10b, and in this embodiment, the front zipper tape 61b is a male zipper tape 61m.
In addition, a back zipper tape 61a is joined to the back blank plate 10a, and in this embodiment, the back zipper tape 61a is a female zipper tape 61f.

Unlike this embodiment, the front zipper tape 61b may be a female zipper tape 61f and the back zipper tape 61a may be a male zipper tape 61m.
In either case, the zipper tape 61 is a pair of a male zipper tape 61m and a female zipper tape 61f.

When the front wall panel 831 of the zippered paper container 80 of the conventional technology is tilted downward to shake out the contents, the contents slide along the front top panel 833b and the inner surface of the front upper overlapping plate 834b, pass through the front zipper tape 861b, and are discharged from the edge of the bottom of the shake-out opening 856 (the blank plate 81b of the front side).

At that time, the contents 89 pass across the front zipper tape 861b. As shown in FIG. 14, the front zipper tape 861b is a female zipper tape 861f, and a recess exists in the female zipper tape fitting portion 863f. Then, when the contents 89 pass, as shown in FIG. 16(a), the contents 89 enter the recess and accumulate.

When the contents are removed and the retractable paper container 80 is returned to its original position, the contents 89 may accumulate inside the recess that is the female zipper tape fitting portion 863f, as shown in FIG. 17(a), and the contents 89 may prevent the male zipper tape 861m and the female zipper tape 861f from being refitted.

In addition, when the front wall panel 31 of the zippered paper container 90 of the present disclosure is tilted downward, the contents 79 slide along the front top panel 33b and the inner surface of the front upper overlapping plate 34b, pass through the zipper tape 61, and are discharged from the edge of the lower side of the dispensing opening 56 (the front blank plate 10b side).

At that time, the contents 79 pass across the front zipper tape 61b. As shown in FIG. 15(a), the front zipper tape 61b is a male zipper tape 61m, and the male zipper tape fitting portion 63m has a convex shape. Therefore, even if the contents 79 pass through, as shown in FIG. 16(b), only a small amount of the contents 79 accumulates on the male zipper tape 61m.

Then, when the zipper tape 61 is re-fitted after the contents have been shaken out and the tilt of the zippered paper container 90 has been returned to its original position, as shown in Figure 17 (b), only a very small amount of contents 79 has accumulated on the upper side of the convex portion, which is the male zipper tape fitting portion 63m, and this content 79 does not hinder the re-fitting of the male zipper tape 61m and the female zipper tape 61f, so they can be easily re-fitted.
Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

As described above, when tilting the paper container with a zipper 90 to dispense the contents 79, it is desirable to have the contents pass over the male zipper tape 61m. To achieve this, the paper container with a zipper 90 is tilted in such a way that the male zipper tape 61m is on the bottom side and the female zipper tape 61f is on the top side.

To achieve this, when tilting the zippered paper container 90 to scoop out the contents 79, a specific indication is printed on the zippered paper container 90 indicating that the container should be tilted so that the male zipper tape 61m is on the bottom.
The indication may be given on the surface of the resealable paper container 90 by printing, attaching an adhesive sticker, stamping, inkjet printing, or the like.

Here, consider a case where the front zipper tape 61b is a male zipper tape 61m and the back zipper tape 61a is a female zipper tape 61f.
In addition, since the front wall panel 31 is often tilted downwards when the contents 79 are to be shaken out, it is often desirable for the front zipper tape 61b to be a male zipper tape 61m.

In this case, the front blank plate 10b on which the male zipper tape 61m is provided is turned down, and the zippered paper container 90 is tilted. As a specific indication, a statement that "this side is turned down" may be written on the front blank plate 10b, particularly on at least one of the front wall plate 31b, the front top plate 33b, and the front upper overlapping plate 34b that constitute a part of the front blank plate 10b. The specific indication is not limited to the specifically described expression as long as it has an equivalent meaning.
In FIG. 10, as an example of a specific display, a display saying "Please shake with this side facing down" is displayed on the front top panel 33b.

Alternatively, a specific indication such as "this side is the top side" may be written on at least one of the rear blank plate 10a, particularly on the rear wall plate 31a, the rear top plate 33a, and the rear upper overlapping plate 34a which constitute a part of the rear blank plate 10a. The specific indication is not limited to the specifically described expression as long as it has an equivalent meaning.
In addition, a female zipper tape 61f is provided on the rear blank plate 10a.
In FIG. 11, as an example of a specific display, the display "Please shake with this side facing up" is displayed on the back top panel 33a.

In the example of FIG. 10, a specific display is displayed on the front blank plate 10b, and in the example of FIG. 11, a specific display is displayed on the back blank plate 10a.
However, a specific indication may be displayed on both the front blank plate 10b and the back blank plate 10a. In this way, the visibility of the specific indication is improved and the risk of tilting the chuck paper container 90 in the wrong direction when the content 79 of the chuck paper container 90 is dispensed is reduced.

Conversely, consider the case where the front zipper tape 61b is the female zipper tape 61f and the back zipper tape 61a is the male zipper tape 61m.
In this case, the zippered paper container 90 is tilted with the front blank plate 10b facing up. To indicate this, a specific indication such as "this side faces up" may be written on at least one of the front wall plate 31b, the front top plate 33b, and the front upper overlapping plate 34b that constitute a part of the front blank plate 10b.

Alternatively, a specific marking indicating "this side is the bottom side" may be written on at least one of the rear wall panel 31a, rear top panel 33a, and rear upper overlapping panel 34a that constitute part of the rear blank panel 10a.

The description regarding the above-mentioned swing-out direction may be provided at least on the front blank plate 10b or the back blank plate 10a, or may be provided on both.
The shaking direction may be written somewhere on the outer surface of the resealable paper container 90. The shaking direction is not written on the resealable paper container 90, but may be written on a document attached at the same time.

Second Embodiment
A blank plate 93 of a resealable paper container 90 of this embodiment is shown in FIG.
The resealable paper container 90 of this embodiment may be provided with an opening sharp line 19 .

<Opening sharp line>
The opening sharp edge 19 will now be described. The blank plate 93 may be provided with an opening sharp edge 19.
Here, a case will be described in which the front zipper tape 61b is a male zipper tape 61m. In this case, therefore, when the contents 79 are to be dispensed, the zippered paper container 90 is tilted with the front blank plate 10b facing downward.

In this case, the opening sharp edge line 19 is provided at least on the front blank plate 10b. The opening sharp edge line 19 is preferably provided on the front blank plate 10b on the side through which the contents 79 pass when the contents 79 are dispensed, and it is preferable that a male zipper tape 61m to which the contents 79 do not easily adhere is joined to the front blank plate 10b.
In other words, it is desirable that the opening sharp edge 19 and the male zipper tape 61 m are provided on the same blank plate 93 .

In addition, because of the opening sharp edge 58b, which is formed by the opening sharp edge line 19 and will be described later, the contents 79 are ejected with a narrow width. Therefore, when pouring the contents into a bottle or the like with a narrow mouth, the width of the contents ejected can be narrowed, so that the contents 79 can be transferred without spilling.

In this embodiment, the rear blank plate 10a also has a rear opening sharp edge 19a.

Here, the opening sharp line 19 provided on the blank plate 93 is provided on the upper overlapping plate 34 and the top plate 33, and its position is approximately the center of the width of the upper overlapping plate 34 and extends approximately vertically in the vertical direction of the zippered paper container 90.
This makes it easier to bend the opening sharp edge line 19. Furthermore, when the contents 79 are ejected from the resealable paper container 90, the direction in which the contents are ejected is easier to predict and therefore easier to control.

The opening sharp line 19 is provided across the entire vertical width of the upper overlapping plate 34 and the top plate 33. That is, it connects the upper edge 21, via the first horizontal fold line 22, to the second horizontal fold line 23.

Here, the portion of the opening sharp line 19 present within the area of the upper overlapping plate 34 is referred to as the first opening sharp line 191, and the portion of the opening sharp line 19 present within the area of the top plate 33 is referred to as the second opening sharp line 192.

The first opening sharp line 191 and the second opening sharp line 192 may be in contact with each other or may be separated from each other.
Furthermore, the first opening sharp edge line 191 and the second opening sharp edge line 192 may be on the same line, or may not be on the same line as long as the function is not impaired.

The back blank plate 10a and the front blank plate 10b are aligned and stacked and joined to produce an intermediate stage paper container with a zipper (flat state) 91 as shown in Figure 19, and then an intermediate stage paper container with a zipper (raised state) 92 (not shown) is produced, and finally the paper container with a zipper 90 is completed.
Except for the provision of the opening sharp edge line 19, the laminated sheet 78 of the blank plate 93, the shape of the paper container 90 with a zipper, the assembly method, etc. are the same as those in the first embodiment.

A perspective view of a resealable paper container 90 of this embodiment is shown in Fig. 20, and a plan view thereof is shown in Fig. 21. The difference from the first embodiment is that an opening sharp edge line 19 is provided.
do.

<Opening for shaking out a paper container with a zipper having an opening sharp line>
22 shows a state in which the top part 71 of the package of the completed chuckable paper container 90 containing the contents of this embodiment is opened for shaking out. The opening means of the chuckable paper container 90 is the same as that of the first embodiment.

In the opened zippered paper container 90 of this embodiment, when the contents 79 are shaken out, the shake-out opening 56 through which the contents 79 pass is surrounded by a front blank plate 10b having a front opening sharp tip 58b at approximately the center in the width direction, and a back blank plate 10a having a back opening sharp tip 58a at approximately the center in the width direction.
In addition, the opening sharp portion 58 is the intersection of the opening sharp line 19 and the easy-open processing line 51 that has been cut and exposed.

The area through which the contents 79 pass is near the center of the front blank plate 10b, and because this area has the sharp front opening portion 58b with a corner, the contents 79 are ejected in a narrow width. Therefore, when pouring the contents into a bottle or the like with a narrow mouth, the width of the ejected contents can be narrowed, so the contents 79 can be transferred without spilling.

The presence of the sharp edge 19a at the rear opening makes the front and back of the opening 56 for dispensing of the zippered paper container 90 symmetrical, which may be preferable from an appearance perspective.

When the easy-open processing line 51 of the zippered paper container 90 is cut and the zipper tape 61 is opened, the opening sharp line 19 forming the opening sharp portion 58 is not bent, and therefore the opening sharp portion 58 is not sharp.
After the zipper tape 61 is opened, the opening sharp line 19 is manually folded in a mountain fold as seen from the outside in the direction in which the inner faces of the blank plates 93 come into contact with each other, thereby making the opening sharp part 58 sharp.

However, if the contents are dispensed in a direction in which the zippered paper container 90 is tilted with one of the side panels 32 facing downwards (when tilting sideways), the side edge seal 36 is present below the area through which the contents pass, so the area through which the contents pass cannot be brought close to the container into which they are being poured, and there is a risk of the contents spilling.

Furthermore, in the zippered paper container 90 of this embodiment, the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being re-fitted together, so that they can be easily re-fitted together.
Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

Third Embodiment
A blank plate 93 of a resealable paper container 90 of this embodiment is shown in FIG.
The front blank plate 10b of this embodiment is the same as the front blank plate 10b of the second embodiment shown in FIG. 18, and has a front opening sharp edge 19b.
The rear blank plate 10a of this embodiment is the same as the rear blank plate 10a of the first embodiment shown in FIG. 4, and does not have a rear opening sharp edge line 19a.

Therefore, the front blank plate 10b and the back blank plate 10a are not line-symmetric. However, excluding the opening sharp line 19, they are line-symmetric with the upper edge 21 as the line of symmetry.

The blank plate 93 is assembled and filled with the contents 79 to complete the package of the chucked paper container 90. Figure 24 shows a perspective view of the chucked paper container 90 with the easy-open processing line 51 cut and the swing-out opening 56 open.

In the paper container 90 with a zipper of this embodiment, the opening sharp line 19 is provided on the front upper overlapping plate 34b and the front top plate 33b, and the intersection of the front opening sharp line 19b and the cut front easy-open processing line 51b forms the front opening sharp part 58b.

When the zippered paper container 90 is tilted with the front wall panel 31b facing downwards and the contents 79 are spilled out, the width of the spilled contents narrows at the front opening sharp tip 58b.

Therefore, when pouring the contents 79 from the zippered paper container 90 of this embodiment into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so the contents can be transferred without spilling, and the amount of contents 79 being shaken out can be easily controlled.

The upper back overlapping plate 34a and the top back panel 33a do not have the sharp back opening line 19a, and therefore the cut-out easy-open back processing line 51a has no bent portion in the area of the upper back overlapping plate 34a, and is a curve. Therefore, the appearance (design) of the zippered paper container 90 with the top part 71 opened is different from that of the second embodiment.

According to the zippered paper container 90 of this embodiment, when the contents 79 are dispensed in a direction in which the zippered paper container 90 is tilted and removed with the front wall panel 31b facing downwards, the area through which the contents 79 pass is near the center of the front blank plate 10b, and in this area, the front opening sharp tip 58b has a corner, so the contents are dispensed in a narrow width.

Therefore, when pouring contents from the zippered paper container 90 of this embodiment into a bottle or the like with a narrow mouth, the width of the contents being shaken out can be narrowed, so the contents can be transferred without spilling, and the amount of contents being shaken out can be easily controlled.

In this embodiment, there is no indication, such as letters, as to the tilt direction when shaking out the contents 79 from the zippered paper container 90. However, since the opening sharp line 19 only has the front opening sharp line 19b, it is clear that the contents are to be shaken out with the front blank plate 10b facing down. In this case, the front opening sharp line 19b is the specific indication.

As another example of this embodiment, a case where a display using text is provided on the front top panel 33b is shown. Fig. 25 shows a perspective view of the chuck-equipped paper container 90 in a state where the chuck-equipped paper container 90 is cut along the easy-open processing line 51 and the swing-out opening 56 is open.
In this embodiment, since the display has text, the direction in which the resealable paper container 90 should be tilted is clearer.

Furthermore, in the zippered paper container 90 of this embodiment, the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being re-fitted together, so that they can be easily re-fitted together.
Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

<Modification 1 of the second and third embodiments>
The present modified example 1 will be described with reference to Fig. 26. Fig. 26 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced.

The front opening sharp edge 19b exists on both the front upper overlapping plate 34b and the front top plate 33b, as in the second embodiment.

However, the front side first opening sharp line 191b does not extend over the entire vertical width of the front side upper overlapping plate 34b, but exists partially therein. In Fig. 26, the front side first opening sharp line 191b is in contact with the front side first horizontal folding line 22b, but is not in contact with the front side upper edge portion 21b.
Alternatively, although not shown, the front side first opening sharp line 191b does not have to be in contact with both the front side first horizontal fold line 22b and the front side upper edge portion 21b.

The front side second opening sharp line 192b exists across the entire vertical width of the front side top panel 33b. In FIG. 26, the front side second opening sharp line 192b is in contact with the front side first horizontal fold line 22b and the front side second horizontal fold line 23b.

In addition, the rear blank plate 10a, which cannot be seen in FIG. 26, does not have the rear opening sharp edge line 19b.
However, the rear blank plate 10a may be provided with a rear opening sharp edge line 19a similar to the front opening sharp edge line 19b.

The dimensions, shape, materials, etc., except for the opening sharp line 19, are the same as in the first embodiment.

In the zippered paper container 90 of this variation 1, the front opening sharp line 19b is shorter than in the second and third embodiments, but depending on the contents 79, the application, the material of the blank plate 93, etc., it is possible to obtain a sufficiently sharp shape for the front opening sharp portion 58b.

Therefore, when pouring the contents 79 from the zippered paper container 90 into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so the contents 79 can be poured without spilling, and the amount of the contents 79 being shaken out can be easily controlled.

Furthermore, since the contents 79 do not hinder the re-engagement of the male zipper tape 61m and the female zipper tape 61f, the zipper tape 61 can be easily re-engaged.
Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

<Modification 2 of the second and third embodiments>
The present modified example 2 will be described with reference to Fig. 27. Fig. 27 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced.

The difference between the second and third embodiments is that the front side first opening sharp line 191b exists across the entire vertical width of the front side upper overlapping plate 34b, i.e., the front side first opening sharp line 191b connects the front side upper edge 21b and the front side first horizontal fold line 22b, and the front side second opening sharp line 192b does not exist.

In this embodiment, the rear blank plate 10a, which cannot be seen in FIG. 27, does not have the rear opening sharp edge line 19b.
However, the rear blank plate 10a may be provided with a rear opening sharp edge line 19a similar to the front opening sharp edge line 19b.

The dimensions, shape, materials, etc., except for the opening sharp line 19, are the same as in the first embodiment.

In the zippered paper container 90 of this embodiment 2, the front opening sharp line 19b is shorter than those of the second and third embodiments, but depending on the contents 79, application, material of the blank plate 93, etc., a sufficiently sharp shape of the front opening sharp portion 58b can be obtained.
In particular, since the front side first opening sharp line 191b is present at the front side zipper tape joint 52b which is difficult to bend, the front side opening sharp line 19b is easily folded over its entirety, and the front side opening sharp portion 58b is easily formed.

Therefore, when pouring the contents 79 into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so the contents 79 can be poured without spilling, and the amount of contents 79 being shaken out can be easily controlled.

Furthermore, since the contents 79 do not hinder the re-engagement of the male zipper tape 61m and the female zipper tape 61f, the zipper tape 61 can be easily re-engaged.
Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

<Modification 3 of the second and third embodiments>
The third modification will be described with reference to Fig. 28. Fig. 28 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced.

The difference between the second and third embodiments is that the front first opening sharp line 191b connects the front easy-open processing line 51b and the front first horizontal fold line 22b in the vertical direction of the front upper overlapping plate 34b, and furthermore, there is no front second opening sharp line 192b.

In addition, the rear blank plate 10a, which cannot be seen in FIG. 28, does not have the rear opening sharp edge line 19b.
However, the rear blank plate 10a may be provided with a rear opening sharp edge line 19a similar to the front opening sharp edge line 19b.

The dimensions, shape, materials, etc., except for the opening sharp line 19, are the same as in the first embodiment.

In the zippered paper container 90 of this embodiment 3, the front opening sharp line 19b is shorter than those of the second and third embodiments, but depending on the contents 79, application, material of the blank plate 93, etc., a sufficiently sharp shape of the front opening sharp portion 58b can be obtained.
In particular, since the front side first opening sharp line 191b is present at the front side zipper tape joint 52b which is difficult to bend, the front side opening sharp line 19b is easily folded over its entirety, and the front side opening sharp portion 58b is easily formed.

Therefore, when pouring the contents 79 into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so the contents 79 can be poured without spilling, and the amount of contents 79 being shaken out can be easily controlled.

In addition, the opening sharp line 19 does not exist in the portion of the upper overlapping plate 34 that is cut at the easy-to-open processing line 51. In other words, the opening sharp line 19 does not exist in an area that becomes unnecessary when the zipper tape 61 is opened, so there is no waste in processing the opening sharp line 19 compared to variant example 2.

Furthermore, since the contents 79 do not hinder the re-engagement of the male zipper tape 61m and the female zipper tape 61f, the zipper tape 61 can be easily re-engaged.
Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

<Modification 4 of the second and third embodiments>
The fourth modification will be described with reference to Fig. 29. Fig. 29 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced.

The difference between the second and third embodiments is that there is no front first opening sharp line 191b. The front second opening sharp line 192b exists across the entire vertical width of the front top panel 33b, i.e., the front second opening sharp line 192b connects the front first horizontal fold line 22b and the front second horizontal fold line 23b.

In addition, the rear blank plate 10a, which cannot be seen in FIG. 29, does not have the rear opening sharp edge line 19b.
However, the rear blank plate 10a may be provided with a rear opening sharp edge line 19a similar to the front opening sharp edge line 19b.

The dimensions, shape, materials, etc., except for the opening sharp line 19, are the same as in the first embodiment.

In the zippered paper container 90 of this variation 4, the front opening sharp edge 19b is shorter than in the second and third embodiments, but depending on the contents 79, application, material of the blank plate 93, etc., it is possible to obtain a sufficiently sharp shape for the front opening sharp edge 58b.

Therefore, when pouring the contents 79 into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so the contents 79 can be poured without spilling, and the amount of contents 79 being shaken out can be easily controlled.

In particular, the front side first opening sharp line 191b does not exist at the front side zipper tape joint 52b. Therefore, when joining the blank plate 93 and the zipper tape 61, there is less risk of the unevenness of the blank plate 93 caused by the front side first opening sharp line 191b hindering the joining of the zipper tape 61.

Furthermore, since the contents 79 do not hinder the re-engagement of the male zipper tape 61m and the female zipper tape 61f, the zipper tape 61 can be easily re-engaged.
Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

<Fourth embodiment>
The present embodiment will be described with reference to Fig. 30. Fig. 30 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced.
The zippered paper container 90 of this embodiment may be provided with an opening assistance line 55 .

<Opening assistance line>
The opening auxiliary line 55 will be described.
An opening assistance line 55 may be provided on the blank plate 93 on which the male zipper tape 61m is provided.
Here, a case will be described in which the front zipper tape 61b is a male zipper tape 61m. In this case, therefore, when the contents 79 are to be dispensed, the zippered paper container 90 is tilted with the front blank plate 10b facing downward.

In this case, the opening assistance line 55 is provided at least on the front blank plate 10b. It is preferable that the opening assistance line 55 is provided on the front blank plate 10b through which the contents 79 pass when the contents 79 are dispensed, and it is preferable that a male zipper tape 61m to which the contents 79 do not easily adhere is attached to the front blank plate 10b.

In the zippered paper container 90 of this embodiment, which is formed in the same manner as in the first embodiment, a front opening assistance line 55b may be provided on the front top panel 33b and/or the front top protrusion (ear) portion 38b and/or the front top side panel 41b.
Additionally, a sharp edge 19b of the front opening may be provided in the same manner as in the second embodiment.

Here, the intersection of the front opening sharp line 19b or a downward extension of the front opening sharp line 19b and the front side second horizontal fold line 23b is set as the reference point Lb at the lower end of the front opening sharp line 19b.

The front opening auxiliary line 55b connects the reference point Lb at the lower end of the front opening sharp line 19b or its vicinity to the intersection of the lower edge of the front zipper tape 61b and the first vertical fold line 12b at the front or its vicinity. Alternatively, it may be partially on the connecting line.

Let us consider a case where the top 71 of the zippered paper container 90 is opened, the front opening sharp line 19b is folded inward when viewed from the outside, and the zippered paper container 90 is tilted so that the front wall panel 31b faces downward, and the contents 79 are poured out.

In this case, if the above-mentioned front opening auxiliary line 55b is present, the front upper overlapping plate 34b and/or the side plate 41b of the front top and/or the front top panel 33b and/or the protruding portion (ear portion) allowance 38b of the front top are easily deformed appropriately.

The inner end 551b of the front opening auxiliary line 55b may be located at or near the reference point Lb at the lower end of the front opening sharp line 19b.

The zipper tape 61 and zipper tape joint 52 are joined, and are rigid enough to be difficult to bend. Furthermore, in order to enlarge the opening of the top portion 71, the opening of the top portion 71 is opened up to the seal margins 36 on both side edges. The outer end 552b of the front side opening assistance line 55b is located at or near the intersection of the lower edge of the zipper tape 61 and the front side first vertical fold line 12b, making it easier to enlarge the opening of the top portion 71.

In this embodiment, the rear blank plate 10a, which cannot be seen in FIG. 30, is not provided with the rear opening auxiliary line 55a and the rear opening sharp line 19a.
However, the rear blank plate 10a may be provided with a rear opening auxiliary line 55b and a rear opening sharp line 19a, similar to the front blank plate 10b.

The shape, material, processing method, etc. of other parts are the same as in the first embodiment.

In the zippered paper container 90 of this embodiment, the opening assistance line 55 stabilizes the shape of the shaking opening 56, increases the dimension in the depth direction, and reduces the dimension in the width direction, making it easier to shake out the contents 79.

Furthermore, in the resealable paper container 90 of this embodiment, the front-side opening sharp edge line 19b allows the front-side opening sharp edge portion 58b to have a sharp shape.
Therefore, when pouring contents 79 from the zippered paper container 90 of this embodiment into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so that the contents 79 can be poured without spilling, and the amount of contents 79 being shaken out can be easily controlled.

Furthermore, in the zippered paper container 90 of this embodiment, the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being re-engaged, so the zipper tape 61 can be easily re-engaged.
Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

Fifth embodiment
The present embodiment will be described with reference to Fig. 31. Fig. 31 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced.

In the zippered paper container 90 of this embodiment, a front opening assistance line 55b is provided on the front top panel 33b and the front top protruding portion (ear portion) margin 38b.
Also, a sharp edge 19b of the front opening is provided similarly to the second embodiment.

The front opening auxiliary line 55b connects the lower end reference point Lb of the front opening sharp line 19b or its vicinity to the front first top intersection point Eb or its vicinity, which is the intersection point of the front first vertical fold line 12b and the front second horizontal fold line 23b. Alternatively, it exists partially on the connecting line.

Let us consider a case where the top 71 of the zippered paper container 90 is opened, the front opening sharp line 19b is folded inward when viewed from the outside, and the zippered paper container 90 is tilted so that the front wall panel 31b faces downward, and the contents are poured out.

In this case, if the above-mentioned front opening auxiliary line 55b is present, the front upper overlapping plate 34b and/or the side plate 41b of the front top and/or the front top panel 33b and/or the protruding portion (ear portion) allowance 38b of the front top are easily deformed appropriately.

The inner end 551b of the front opening auxiliary line 55b may be located at or near the reference point Lb at the lower end of the front opening sharp line 19b.

In addition, since the front opening auxiliary line 55b does not exceed the front second horizontal folding line 23b, the number of intersections of the folding lines can be reduced, resulting in a simple appearance. Furthermore, it is easy to appropriately fold the folding lines in the peripheral area where the front opening auxiliary line 55b and the front second horizontal folding line 23b are close to or in contact with each other.

In order to enlarge the opening of the top portion 71, the opening of the top portion 71 is opened up to the seal margin 36 on both side edges. For this purpose, the outer end 552b of the front side opening auxiliary line 55b may be located at the front side first top intersection point Eb or in its vicinity.

In this embodiment, the rear blank plate 10a, which cannot be seen in FIG. 31, is not provided with the rear opening auxiliary line 55a and the rear opening sharp line 19a.
However, the rear blank plate 10a may be provided with a rear opening auxiliary line 55b and a rear opening sharp line 19a, similar to the front blank plate 10b.

The shape, material, processing method, etc. of other parts are the same as in the first embodiment.

In the zippered paper container 90 of this embodiment, the opening assistance line 55 stabilizes the shape of the shaking opening 56, increases the dimension in the depth direction, and reduces the dimension in the width direction, making it easier to shake out the contents 79.

In addition, in the zippered paper container 90 of this embodiment, the front opening sharp line 19b allows the front opening sharp portion 58b to have a sharp shape.

Therefore, when pouring the contents 79 from the zippered paper container 90 of this embodiment into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so the contents 79 can be poured without spilling, and the amount of the contents 79 being shaken out can be easily controlled.

Furthermore, in the zippered paper container 90 of this embodiment, the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being re-engaged, so the zipper tape 61 can be easily re-engaged.
Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

The above has mainly described the method of creating the blank plate 93 in relation to the front blank plate 10b. However, as the shape of the back blank plate 10a is the same, it is symmetrical about the upper edge portions 21a and 21b, and the manufacturing method is the same, the explanation of the back blank plate 10a will be omitted.
However, the opening sharp line 19 and the opening auxiliary line 55 may be different between the front blank plate 10b and the back blank plate 10a.

Sixth Embodiment
The present embodiment will be described with reference to Fig. 32. Fig. 32 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced.

The resealable paper container 90 of this embodiment is a resealable paper container 90 obtained by eliminating the opening sharp line 19 from the resealable paper container 90 of the fifth embodiment, but is provided with an opening assistance line 55.
The shape, material, processing method, etc. of other parts are the same as those of the fifth embodiment.

In this embodiment, since the opening sharp line 19 is not provided, the opening sharp portion 58 formed by the opening sharp line 19 is not provided.
However, the opening assistance line 55 stabilizes the shape of the shaking opening 56, increases the dimension in the depth direction and decreases the dimension in the width direction, resulting in a shape that makes it easy to shake out the contents 79.

Furthermore, in the zippered paper container 90 of this embodiment, the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being re-engaged, so the zipper tape 61 can be easily re-engaged.
Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

The present disclosure will now be described more specifically with reference to examples.
Example 1
In Example 1, a paper container 90 with a zipper having the configuration shown in FIG. 7 was produced using a blank plate 93 in FIG. 4 corresponding to the first embodiment.

Two blank plates 10a and 10b as shown in Figure 4 were prepared, and the inner surfaces were aligned and overlapped. As shown in Figure 5, the side edge seal portions 36 on both opposing sides were heat sealed, and the upper seal portion 53 was also heat sealed. The zipper tape 61 was also heat sealed. In this way, a paper container with a zipper (flat state) 91 in the intermediate stage was produced, with the bottom seal portion 37 unsealed.

Next, as shown in FIG. 6, the container was raised into a three-dimensional shape to produce a paper container with a zipper in an intermediate stage (raised state) 92 with an open bottom 73, and then the paper container with a zipper 90 of Example 1 was produced.

The laminated sheet 78 of the blank plate 93 was made of the following laminated sheet 78 (see FIG. 13(d)).
(Outer side)
Printing layer for patterns, etc. (gravure printing) /
Paper base layer 782 (Nippon Paper Bleached Kraft (S) 120g/ ^m2 ) /
Intermediate adhesive layer 784 (EMAA 20 μm Mitsui Dow Polychemical N0908N) /
Barrier layer 785 (silica-deposited PET 12 μm Dai Nippon Printing IB-PET-UBP) /
Innermost thermoplastic resin layer 783 (LDPE 40 μm Japan Polyethylene LC520)
(Inner side)

A method for producing the laminated sheet 78 will now be described.
First, a barrier layer 785 (silica-deposited PET 12 μm) was laminated on the inner surface of the paper base layer 782 by extrusion lamination (sandwich lamination) with a molten intermediate adhesive layer 784 (EMAA 20 μm) interposed therebetween.

Next, an innermost thermoplastic resin layer 783 (LDPE 40 μm) was formed by extrusion lamination on the opposite side (inner side) of the paper base layer 782 of the barrier layer 785 .
Next, a design was printed on the outer surface of the paper base layer 782 using a gravure printing machine.

In addition, to improve the bonding strength between each bonding layer, anchor coat treatment, corona treatment, flame treatment, etc. may be performed as necessary. Alternatively, ozone treatment may be performed on the molten resin.

Then, on the front side of the paper base layer 782, in the same process as the images, a message stating "Please place this side up" was printed by gravure printing in the area intended to become the top panel 33a on the back side of the blank plate 93.

Next, the laminated sheet 78 was scored and punched to complete the blank plate 93.

The zipper tape 61 that is heat-sealed to the inner surface of the upper overlapping plate 34 and the top side plate 41 of the zipper-equipped paper container 90 has a two-layer structure in which the zipper tape body 62 that is heat-sealed is made of both the male zipper tape 61m and the female zipper tape 61f.

The zipper tape 61 has a resin layer made of LLDPE on the side that is heat sealed to the zippered paper container 90, and a resin layer on the opposite side made of MDPE. The male zipper tape fitting portion 63m and the female zipper tape fitting portion 63f are both made of LLDPE, and the zipper tape body portion 62 both have a width of 13 mm.

In this embodiment, the front zipper tape 61b is the male zipper tape 61m and the back zipper tape 61a is the female zipper tape 61f, and each zipper tape 61m, 61f is joined to a predetermined position of the blank plate 93.

Here, the grain of the paper base layer 782 will be explained. The grain of the paper base layer 782 is parallel or perpendicular to the longitudinal direction of the zipper tape 61. In this embodiment, the grain of the paper base layer 782 is parallel.

The dimensions of the rear blank plate 10a and the front blank plate 10b are rectangular, measuring 220 mm in length and 169 mm in width, with a 7 mm-wide side edge seal margin 36 provided on the side edges 11 on both the left and right sides as a seal margin at the peripheral edges.

Additionally, the lower edge 26 was provided with a bottom seal margin 37 having a width of 10 mm.
Further, a sealing margin of an upper seal portion 53 having a width of 4 mm was provided near the upper edge portion 21 of the upper overlapping plate 34 and the side plate 41 of the top portion.

On the blank plate 93, from the upper edge 21 downward, an upper overlapping plate 34, a first horizontal fold line 22, a top panel 33, a second horizontal fold line 23, a wall panel 31, a third horizontal fold line 24, and a bottom panel 35 are provided in this order.

In addition, top side panels 41 are provided on the outside of both the left and right sides of the upper overlapping plate 34 via the second vertical fold line 13.

In addition, a top protrusion (ear) space 38 is provided on the outside of both the left and right sides of the top panel 33 via the second vertical fold line 13.

In addition, side panels 32 are provided on the outside of both the left and right sides of the wall panel 31 via the second vertical fold line 13.

In addition, bottom protrusions (ears) 43 are provided on the outside of both the left and right sides of the bottom panel 35 via the second vertical fold lines 13.

In addition, the top protrusions (ears) 38 are connected to the lower sides of the top side panels 41 on both the left and right sides via the first horizontal fold lines 22.

The side panel 32 is connected to the lower side of the top protruding portion (ear portion) 38 via the second horizontal fold line 23.

A bottom protrusion (ear) 43 is connected to the lower side of the side panel 32 via the third horizontal fold line 24.

The bottom seal portion 37 is connected to the bottom panel 35 and the lower side of the bottom protrusions (ears) 43 on both the left and right sides.

Furthermore, on the upper overlapping plate 34 and the top side plate 41, an easy-open processing line 51 (here a perforation line) is printed in the transverse direction on the paper base layer 782 of the laminated sheet 78 as a means for opening the container, at a position 8 mm below the upper edge 21, which becomes the upper edge when the inner surfaces of the two blank plates 10a, 10b are aligned and overlapped, as shown in Figure 5.
In addition, the perforation line of the easy-to-open processing line 51 may be processed before the paper base layer 782 is extrusion laminated.

Furthermore, below the easy-open processing line 51, zipper tape 61 (13 mm wide) was heat-sealed to the inner surface of the upper overlapping plate 34 and each of the top side plates 41 with a gap of 3 mm.

Furthermore, after joining the two blank sheets 10a, 10b, heat sealing the zipper tape 61, heat sealing the side edge seal portion 36, and heat sealing the upper seal portion 53 using the method described above, a notch 77 was provided on the side edge portion 11 to the right of the easy-open processing line 51, and a zippered paper container (flat state) 91 in the intermediate stage was produced with the bottom portion 73 in an unsealed state (see Figure 5).

Next, a mandrel was inserted into this intermediate-stage zippered paper container (flat state) 91 through the unsealed opening of the bottom 73, leaving the upper overlapping plate 34, and the top plate 33 below it was spread back and forth along the first horizontal fold line 22, causing the upper overlapping plate 34 to stand upright. Below that was the top 71 made of the top plate 33, followed by the body 72 whose horizontal cross section (a plane roughly parallel to the bottom surface) is roughly rectangular, forming an intermediate-stage zippered paper container (raised state) 92 with a roughly rectangular opening at the bottom 73. (See FIG. 6).

Then, the overlapped upper overlapping plate 34 was folded toward the back top plate 33a.
The upper overlapping plate 34 bent toward the rear top panel 33 a is a part of the components of the top portion 71 .

Furthermore, the top protrusions (ears) 74 connected to both the left and right sides of the top 71 of the zippered paper container 90 were joined to the body 72 of the zippered paper container 90. This joining was performed by joining the paper base layer 782 on the lower surface of the top protrusions (ears) 74 to the paper base layer 782 on the surface of the body 72 using hot melt.

The dimensions of the completed paper container 90 with a zipper, which is roughly rectangular, are 95 mm wide, 120 mm high, and 60 mm deep.

Example 2
In Example 2, the paper container with a chuck 90 described in the second embodiment was produced. A blank plate 93 shown in Fig. 18 was prepared. Then, an intermediate stage with a chuck (flat state) 91 shown in Fig. 19 was produced, and then the paper container with a chuck 90 shown in Fig. 20 was produced. Except for the provision of the opening sharp line 19, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a chuck 90 were the same as in Example 1.

Example 3
In Example 3, the paper container with a zipper 90 described in the third embodiment was produced. A blank plate 93 shown in Fig. 23 was prepared, and a paper container with a zipper 90 (not shown) was produced. The shape of the blank plate 93, the laminated sheet 78, and the method of producing the paper container with a zipper were the same as those in Example 1, except that the front opening sharp line 19b was provided.

Example 4
In Example 4, the paper container 90 with a chuck described in Modification 1 of the third embodiment was produced. A blank plate 93 was prepared as a pre-stage for forming the paper container with a chuck (flat state) 91 in the intermediate stage shown in Fig. 26. Then, the paper container 90 with a chuck (not shown) was produced.

In this embodiment, the front opening sharp line 19b was provided only on the front blank plate 10b, and the back blank plate did not have the back opening sharp line 19a. Other than providing the front opening sharp line 19b, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a zipper were the same as in Example 1.

Example 5
In Example 5, the paper container 90 with a chuck described in Modification 2 of the second embodiment was produced. A blank plate 93 was prepared as a pre-stage for forming the paper container with a chuck (in a flat state) 91 in the intermediate stage shown in Fig. 27. Then, the paper container 90 with a chuck (not shown) was produced.

In this embodiment, the front blank plate 10b has a front opening sharp line 19b, and the back blank plate has a back opening sharp line 19a having a shape similar to the front opening sharp line 19b. Other than the sharp opening line 19, the shape of the blank plate 93, the laminated sheet 78, and the method of manufacturing the paper container with a zipper were the same as in Example 1.

Example 6
In Example 6, the paper container 90 with a chuck described in Modification 3 of the third embodiment was produced. A blank plate 93 was prepared as a precursor to forming the intermediate stage paper container 91 with a chuck (flat state) shown in Fig. 28. Then, the paper container 90 with a chuck (not shown) was produced.

In this embodiment, the front opening sharp line 19b was provided only on the front blank plate 10b, and the back blank plate did not have the back opening sharp line 19a. Other than providing the front opening sharp line 19b, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a zipper were the same as in Example 1.

Example 7
In Example 7, the paper container 90 with a chuck described in Modification 4 of the second embodiment was produced. A blank plate 93 was prepared as a pre-stage for forming the paper container with a chuck (in a flat state) 91 in the intermediate stage shown in Fig. 29. Then, the paper container 90 with a chuck (not shown) was produced.

In this embodiment, the front blank plate 10b has a front opening sharp line 19b, and the back blank plate has a back opening sharp line 19a having a shape similar to the front opening sharp line 19b. Other than the sharp opening line 19, the shape of the blank plate 93, the laminated sheet 78, and the method of manufacturing the paper container with a zipper were the same as in Example 1.

Example 8
In Example 8, the paper container with a zipper 90 described in the fourth embodiment was produced. A blank plate 93 was prepared as a pre-stage for forming the paper container with a zipper (flat state) 91 in the intermediate stage shown in Fig. 30. Then, the paper container with a zipper 90 (not shown) was produced.

In this embodiment, the front blank plate 10b was provided with a front opening sharp line 19b and two (a pair) front opening auxiliary lines 55b. Furthermore, the back blank plate 10a was provided with a back opening sharp line 19a and two (a pair) back opening auxiliary lines 55a having the same shape as the front opening sharp line 19b and the two (a pair) front opening auxiliary lines 55b. Furthermore, except for the provision of the opening sharp line 19 and the opening auxiliary line 55, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a zipper were the same as in Example 1.

<Example 9>
In Example 9, the paper container with a zipper 90 described in the fifth embodiment was produced. A blank plate 93 was prepared as a pre-stage for forming the paper container with a zipper (flat state) 91 in the intermediate stage shown in Fig. 31. Then, the paper container with a zipper 90 (not shown) was produced.

In this embodiment, the front opening sharp line 19b and two (a pair) front opening auxiliary lines 55b were provided only on the front blank plate 10b. However, the rear opening sharp line 19a and the rear opening auxiliary line 55a were not provided on the rear blank plate 10a. Other than providing the front opening sharp line 19b and the front opening auxiliary line 55b, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a zipper were the same as in Example 1.

Example 10
In Example 10, the paper container with a zipper 90 described in the sixth embodiment was produced. A blank plate 93 was prepared as a pre-stage for forming the paper container with a zipper (flat state) 91 in the intermediate stage shown in Fig. 32. Then, the paper container with a zipper 90 (not shown) was produced.

In this embodiment, two (a pair) front opening assist lines 55b were provided only on the front blank plate 10b. However, the rear opening assist line 55a was not provided on the rear blank plate 10a. Other than providing the front opening assist line 55b, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a zipper were the same as in Example 1.

Comparative Example
In the comparative example, a blank plate 81 shown in FIG. 1 was prepared, and a paper container 80 with a zipper shown in FIG. 2 was produced.

3 and 12, a male zipper tape 861m was provided on the front zipper tape 861b, and a female zipper tape 861f was provided on the back zipper tape 861a. The manufacturing methods of the laminated sheet 88 and the paper container 80 with a zipper were the same as those in the first embodiment.
Furthermore, there was no indication on the resealable paper container 80 as to the direction in which the resealable paper container 80 could be tilted when shaking out the contents.

<Evaluation>
100 pieces of each of the paper containers with zippers of Examples 1 to 10 and the Comparative Example were produced.
In addition, when producing the chuck-equipped paper container 80 of the comparative example, there was a process of folding the blank plate 81 at the middle horizontal folding line (half folding line) 821. (See FIG. 1.) In this process, an incident was observed in which the adjacent easy-to-open processing line (perforation line) 851 was folded by mistake. When the easy-to-open processing line (perforation line) 851, which should not be folded, was folded, the blank plate 81 became a defective product, resulting in a loss.

This is because the easy-to-open processing line (perforation line) 851 has many cut portions (including half cuts) to ensure easy opening, making it easy to fold unintentionally. The ease with which the easy-to-open processing line (perforation line) 851 can be folded is often about the same as the ease with which the middle horizontal fold line (half fold line) 821 can be folded, and when the zippered paper container 80 is manufactured, the middle horizontal fold line (half fold line) 821 is folded carefully, but the adjacent easy-to-open processing line (perforation line) 851 may be folded by mistake.

Furthermore, if the intermediate horizontal fold line (half fold line) 821 is folded more carefully, the time required to manufacture the zippered paper container 80 increases. As a result, the manufacturing capacity of the zippered paper container 80 may decrease.

In contrast, in the present disclosure, in which two blank plates 10a, 10b are joined to produce a paper container 90 with a zipper, there is no intermediate horizontal fold line, and therefore there is no process for folding the intermediate horizontal fold line, so that the defect of accidentally folding the easy-open processing line (perforation line) 851 as described above does not occur.
Therefore, in the retractable paper container 90 of the present disclosure, the production capacity is not reduced and the occurrence of defects can be reduced.

The zippered paper containers 90 of Examples 1 to 10 prepared as described above were filled with wheat flour as the contents from the bottom 73. Next, the bottom 73 was folded in, the bottom seal 37 was heat sealed, and the heat sealed portion was laid down toward the rear bottom panel 35a.

Furthermore, the bottom protrusions (ears) 75 protruding from both the left and right sides of the bottom 73 of the zippered paper container 90 were folded toward the bottom plate 35. Furthermore, they were joined to the front bottom plate 35b and/or the front bottom seal portion 37b with an adhesive (hot melt), completing the packaging of the zippered paper container 90 having a substantially rectangular parallelepiped shape.
In addition, the protruding portion (ear) 74 on the top side of the zipper-equipped paper container 90 was also bonded to the body portion 72 using an adhesive (hot melt) before filling it with wheat flour.

Furthermore, the comparative paper container 80 with a zipper was filled with wheat flour as the contents from the bottom 873. Next, the bottom 873 was folded in, the bottom seal 837 was heat sealed, and the heat sealed portion was laid down toward the rear bottom panel 835a.

Furthermore, the bottom protruding parts (ear parts) protruding from both the left and right sides of the bottom 873 of the chuck-equipped paper container 80 of the comparative example were folded toward the bottom plate 835. Furthermore, they were joined to the front bottom plate 835b and/or the front bottom seal part 837b with an adhesive (hot melt), completing the package of the chuck-equipped paper container 80 having a substantially rectangular parallelepiped shape.
In addition, the top protrusion (ear) 874 of the chuck-equipped paper container 80 of the comparative example was also joined to the body 872 using adhesive (hot melt) before filling it with wheat flour.

The packages of the zippered paper containers 90 of Examples 1 to 10 prepared as described above and the package of the zippered paper container 80 of the comparative example were tested for their openability, suitability for shaking out the contents, and resealability with zipper tape.

In the packaging of the zippered paper container 90 of Examples 1 to 10, the easy-to-open processing line 51 provided as an opening means on the upper overlapping plate 34 and the upper side plate 41 of the top part, and the notch 77 provided at one end of the easy-to-open processing line allow the upper seal portion 53 to be easily cut off, forming the opening 56 for dispensing.

Next, the opening gripping tab 57 of the opened swing-out opening 56 was gripped and pulled apart to both sides, whereby the engagement of the zipper tape 61 could be easily released.
In addition, the opening 56 for shaking at the top of the package of the resealable paper container 90 was opened across substantially the entire width of the resealable paper container 90 .

Next, the opening sharp line 19 of the resealable paper container 90 of Examples 2 to 9 was folded in a mountain shape when viewed from the outside of the resealable paper container 90, and an opening sharp portion 58 was provided at the shaking opening 56.
Even if the opening sharp line 19 is not in contact with the easy-open finish line 51, the opening sharp line 19 extends above it and bends, so that the opening sharp portion 58 is formed.

Furthermore, the opening assistance lines 55 of the zippered paper containers 90 of Examples 8 to 10 were folded in a mountain shape when viewed from the outside of the zippered paper container 90. Also, when the shaking opening 56 was opened, the upper overlapping plate 34 and/or the top side plate 41 and/or the top panel 33 and/or the top protruding portion (ear portion) margin 38 were able to deform more smoothly because the opening assistance lines 55 were bent appropriately.

In Examples 1 to 10, the zippered paper container 90 was tilted so that the front blank plate 10b was on the bottom, i.e., so that the front zipper tape 61b, which is the male zipper tape 61m, was on the bottom, and some of the flour was shaken out.

After that, the resealable paper container 90 was returned to its original position, the zipper tape 61 was reattached, and the resealable paper container 90 was resealed successfully, allowing the remaining flour to be properly stored.

In addition, in the zippered paper containers 90 of Examples 2 to 9, the flour was spun out in a narrow width from the opening sharp edge 58, which has a corner (or a curve with a small radius of curvature) formed by the opening sharp edge line 19, so it was easily transferred to a table jar.

Furthermore, the opening assistance lines 55 of the zippered paper containers 90 of Examples 8 to 10 stabilize the shape of the opening 56 for shaking, and the opening 56 for shaking becomes larger in the depth direction and smaller in the width direction, making it easier to shake out the flour.

On the other hand, in the package of the chuck-equipped paper container 80 of the comparative example, the easy-open processing line 851 was also cut to form a shaking opening 856 .
Then, the zipper tape 861 was released, and the shaking opening 856 at the top of the package of the zippered paper container 80 was opened across substantially the entire width of the zippered paper container 90.

Then, the zippered paper container 80 was tilted so that the blank plate 81b on the front side was facing down, i.e., so that the female zipper tape 61f, which is the front zipper tape 861b, was facing down, and some of the flour was shaken out.

After that, the zippered paper container 80 was tilted back and the zipper tape 861 was visually inspected, and flour had entered and accumulated in the recess of the female zipper tape fitting portion 863f.

After that, when an attempt was made to reseal the zippered paper container 80 by refitting the zipper tape 861, there were cases where the flour that had accumulated in the recess of the female zipper tape fitting portion 863f prevented the zipper tape from being refitted. As a result, there were cases where the zippered paper container 80 could not be resealed properly, and the remaining flour could not be properly stored.

In addition, the paper mass ratio of the zippered paper containers 90 of Examples 1 to 10 to the total mass of the paper container was approximately 60% by mass, which fully satisfied the standard of 51% by mass or more for paper containers.

10a Back blank plate 10b Front blank plate 11 Side edge 12 First vertical fold line 13 Second vertical fold line 17 Top diagonal fold line 18 Bottom diagonal fold line 19 Opening sharp line 191 First opening sharp line 192 Second opening sharp line 21 Upper edge 22 First horizontal fold line 23 Second horizontal fold line 24 Third horizontal fold line 25 Fourth horizontal fold line 26 Lower edge 31 Wall panel 32 Side panel 33 Top panel 34 Upper overlapping panel 35 Bottom panel 36 Side edge seal margin 37 Bottom seal margin 38 Top protruding portion (ear) margin 41 Top side panel 43 Bottom protruding portion (ear) margin 51 Easy-open processing line 52 Zipper tape joint 53 Upper seal portion 55 Opening assistance line 551 Inner end of opening assistance line 552 Outer end of opening assistance line 56 Opening for opening 57 Opening grip margin 58 Opening sharp portion 61 Zipper tape 61a Back zipper tape 61b Front zipper tape 61m Male zipper tape 61f Female zipper tape 62 Zipper tape body 62a Back zipper tape body 62b Front zipper tape body 62m Male zipper tape body 62f Female zipper tape body 63 Zipper tape fitting portion 63a Back zipper tape fitting portion 63b Front zipper tape fitting portion 63m Male zipper tape fitting portion 63f Female zipper tape fitting portion 71 Top portion of zippered paper container 72 Body portion of zippered paper container 72d Ridge portion of body portion 73 Bottom 74 of zippered paper container Top protruding part (ear)
75 Bottom protrusion (ear)
77 Notch 78 Laminated sheet 781 Outermost thermoplastic resin layer 782 Paper base layer 783 Innermost thermoplastic resin layer 784 Intermediate adhesive layer 785 Barrier layer 79 Contents 80 Conventional paper container with zipper 81 Blank plate 81a Back side blank plate 81b Front side blank plate 812 First vertical fold line 821 Middle horizontal fold line (half fold line)
831 Wall panel 833 Top panel 834 Upper overlapping panel 835 Bottom panel 836 Side edge seal portion 837 Bottom seal portion 851 Easy-open processing line 856 Swing-out opening 861 Zipper tape 861a Back zipper tape 861b Front zipper tape 861m Male zipper tape 861f Female zipper tape 862 Zipper tape body 862a Back zipper tape body 862b Front zipper tape body 862m Male zipper tape body 862f Female zipper tape body 863 Zipper tape fitting portion 863a Back zipper tape fitting portion 863b Front zipper tape fitting portion 863m Male zipper tape fitting portion 863f Female zipper tape fitting portion 871 Top portion of zippered paper container 872 Body portion of zippered paper container 873 Bottom portion of zippered paper container 874 Top protruding portion (ear portion)
88 Laminated sheet of paper container 881 Outermost thermoplastic resin layer 882 Paper base layer 883 Innermost thermoplastic resin layer 884 Intermediate adhesive layer 885 Barrier layer 89 Contents 90 Paper container with chuck according to one embodiment of the present disclosure 91 Paper container with chuck in intermediate stage according to one embodiment of the present disclosure (flat state)
92 An intermediate stage of a zippered paper container according to one embodiment of the present disclosure (in a raised state)
93 Blank plate according to one embodiment of the present disclosure

E First top intersection (intersection of the first vertical fold line and the first horizontal fold line)
F. Second top intersection (intersection of the second vertical fold line and the second horizontal fold line)
G First bottom intersection (intersection of the first vertical fold line and the fourth horizontal fold line)
H Second bottom intersection (intersection of the second vertical fold line and the third horizontal fold line)
L The reference point of the lower end of the opening sharp line (the second horizontal folding line and
(Intersection with the opening sharp line or its downward extension)

Claims (6)

A paper container with a zipper is assembled by joining a front blank plate and a back blank plate made of a laminated sheet having a paper base material,
A top part including an upper overlapping plate formed by overlapping and joining the front blank plate and the back blank plate to the top of the zipper-equipped paper container, and a top plate connected to the lower side of the upper overlapping plate;
A top side plate connected to both left and right ends of the upper overlapping plate;
A top portion protruding portion provided on both the left and right sides of the top portion;
A body portion provided below the top portion;
A bottom portion provided on the lower side of the body portion;
An upper seal portion that crosses the upper edge portions or the vicinity of the upper edge portions of the upper overlapping plate and the side plate of the top portion;
a zipper tape located below the upper seal portion and extending across the upper overlapping plate and the side plate of the top portion;
A male zipper tape constituting the zipper tape is provided on either the front blank plate or the back blank plate,
A female zipper tape constituting the zipper tape is provided on the other of the front blank plate or the back blank plate,
The chuck paper container is provided with a specific marking indicating a direction in which the chuck paper container is tilted when the contents of the chuck paper container are poured out ,
A paper container with a zipper , characterized in that the blank plate on which the male zipper tape is provided has an opening sharp line . The paper container with a zipper according to claim 1, characterized in that the specific indication indicates that the male zipper tape will be on the bottom side when the paper container with a zipper is tilted to scoop out the contents. The paper container with a zipper according to claim 1 or 2, characterized in that the specific indication indicates that the female zipper tape will be on the top side when the paper container with a zipper is tilted and the contents are poured out. A paper container with a zipper as described in any one of claims 1 to 3, characterized in that at least one of the upper overlapping plate and/or the top plate, which are part of the blank plate, is provided with an opening sharp line extending vertically in the longitudinal direction of the paper container with a zipper. 5. The paper container with a zipper according to claim 1, wherein the blank plate on which the male zipper tape is provided is provided with an opening assist line. The paper container with a zipper as described in claim 5, characterized in that an opening assistance line is provided at least on the upper overlapping plate, and/or the side plate of the top part, and/or the top panel, and/or the top side protrusions (ears) connected to the left and right sides of the top panel.