JPH06544B2 - Bag with a retractable sealing device - Google Patents

Description

FIELD OF THE INVENTION This invention relates generally to packaging technology, and more particularly to openable bags.

Conventional technology A large number of various openable bag structures have been proposed so far, and some of them have been proved to be extremely good quality products.

In particular, it is easy to handle, and it is airtight until it is opened to take out the article inside, and once opened, the opening and closing sealing device closes the opening until the next article is taken out. Emphasis has been placed on providing bags to hold. Representative of various types of bags to which the improvements of the present invention may be applied are the following US patents:

U.S. Pat. Nos. 2,978,769 and 3,172,443 present a fastener profile joining method that is not retractable but can be peeled off.

U.S. Pat. No. 3,325,084 presents a sealing flap structure with a profile that fits into the sealing profile on the front of the bag or wrap.

U.S. Pat. No. 3,326,399 presents a retractable sealing method using a magnet.

US Patents 3198228, 3473589 and 3780781
No. 1 is a fastener or zipper that can be opened and closed, and it proposes a structure in which the upper part of the bag is broken to remove the zipper.

U.S. Pat. No. 3,543,343 presents a bag with a retractable fastener profile and an opening cord for opening the bag.

U.S. Pat. No. 3,625,270 presents an opening ribbon device for opening bags.

U.S. Pat. No. 3,746,215 presents a funnel structure in which the bag is sealed closed until the funnel is inverted and its tip cut off.

United States Patent Nos. 3991801, 4191230 and 4235563
Issue presents a funnel-shaped bag with a different structure.

U.S. Pat.No. 4241865 presents a durable bag made of paper that has a first sealing device with a pull-out string on top of which there is a hood with a mating tooth type retractable zipper. There is.

Problems to be Solved by the Invention Although this kind of technology is in a relatively advanced stage of development,
A double-sealing bag, i.e., an airtight or at least a non-opening and closing device that is clear and easy to handle;
There is still room for improvement in a bag equipped with an opening / closing type sealing device that complements it, and to achieve simplicity and economy.

An important object of the present invention is to provide a new type of improved bag which has a non-opening / closing type sealing device which can be easily opened with a finger when the opening / closing type sealing device is in an “open” state and which can be reclosed by the opening / closing type sealing device. Or to provide a packaging structure.

Means for Solving the Problems To achieve this object, the present invention provides the following bag. That is, the facing bag wall surfaces are joined to the bottom end and both sides, and the bag opening is formed between the upper ends of both wall surfaces.
The opening and closing type sealing device is located inside the upper end,
To close the bag mouth, the retractable sealing device can be "closed" with finger pressure, which can also be opened with a finger pulling force to gain access to the bag. There is a non-opening / closing type sealing device inside the opening / closing type sealing device. In the initial state, the mouth of the bag can be closed independently of the opening / closing type sealing device. , A bag with the above devices that can be opened with a pulling force when the openable seal device is open.

EXAMPLE As shown in FIGS. 1 and 2, packaging or bag (20)
Have facing wall surfaces (21) which form a space (22) for receiving articles. Wall (21) is bottom end (23)
Then, the materials for forming the wall surface (21) are folded, and if the materials are made of separate sheets, they are joined by the seam method. Both sides of the wall are made of well-known plastic film, either mono film or laminated film, depending on the intended use of the bag. Are joined together. Adhesive bonding is effective when the material is not suitable for fusion sealing.

The wall surface (21) of the bag forms the mouth (25) of the bag in the space between them by the upper end portion thereof, and the opening / closing sealing device (27) on the upper part of the wall surface (21) and the non-opening type inside thereof. Sealing device (28)
When opened, the space (22) for receiving articles can be accessed through its mouth.

In one preferred form, the retractable sealing device (27) is made of a stripe of adhesive (29) that is joined by pressure.
The adhesive is permanently affixed to one wall, and the adhesive surface (30) is releasably joined to the other wall. As shown, the retractable fastener stripe (29) extends entirely from one end of the opening to the other, and when the fastener is closed, the bag mouth (25) is It is in a completely “closed” state with respect to entry and exit of the bag portion (22). However, when you want to open the fastener (27), grasp the upper ends of both wall surfaces (21) that play the role of the pulling flange (31) with your fingers and pull them apart, the fastener surface (30) joins the wall surfaces. Separated from, the bag mouth (25) opens. By pressing the upper part of the wall surface (21) together with the fastener (27) with a finger and applying pressure, the fastener surface (30) is rejoined to the facing wall surface so that it can be opened again,
This closes the bag mouth (25).

The non-opening and closing device (28) preferably comprises a peel seal (32) such that the facing surface area of the wall surface (21) is heat sealed in such a way that the surfaces are peel sealed. To be done. Such a seal can open the seal rather than a permanent seal. That is, after opening and closing the openable seal to access the inside, a force for separating the upper end of the wall surface (21) can be applied to peel and open. After that, the peel seal (28) remains open, but the bag can be closed again by the retractable seal (27).

The bag (20 ') shown in FIGS. 3 and 4 is composed of two facing wall surfaces (33), and forms an article receiving space (34). At its bottom end, the wall surfaces (33) are joined together by the method of heat sealing (35). Both ends of the wall are joined together by the method of heat seal seam (37). Of course, if the material of the wall surface (33) is not compatible with the heat seal, the sealing seams (35) and (37) are joined by an adhesive method.

At the upper end of the bag (20 ') and the bag mouth, the wall surface (33) is integrally joined by a fold (38) facing inward, and the other end of the wall (33) is a side seal. It is joined to both ends of the upper end of the seam (37). In the folding part (38),
Along its inner edge, there is a non-opening and closing device (39) in the form of a single line that weakens perforations such as perforations that extend in the longitudinal direction of the fold. Retractable Sealing Device (40)
Is made of adhesive stripes that are joined by pressure and is permanently affixed to one wall surface of the fold (38) and has an adhesive surface (41), which is the surface of the fold. It is releasably joined to the facing inner wall surface. Adhesive stripes (40) preferably extend the entire length of the portion to be folded.

When you want to open the bag (20 '), apply a finger-pulling force to the upper outer edge of the folding part that joins the upper end of the wall surface (33) so that the fastener surface (41) is joined. The fastener (40) is pulled away from the wall of the folding part.
open. In addition, applying more pulling force to the already open folds (38) will disconnect the non-openable tear-off seal lines or perforations to allow full access to the interior of the bag (34). When it is desired to close the bag again, finger pressure is applied at the top of the bag surface (33) in the direction of the fasteners (40) so that the fastener surface (41) is against the inner wall surface facing the fold (38). The peelable fasteners (40) close the mouth of the bag, being adhesively joined together.

In the bag (42) shown in FIGS. 5-7, the facing wall surface (43)
Are formed by folding sheets or separate sheets as in FIGS. 1 and 2, the wall (43) is joined by the method of bottom folding (44), and the sides of the bag have seal seams (4
It is joined by the method of 5). For the latter, a method of heat sealing or a method of adhesive sealing may be adopted depending on the case. Wall (4
The upper end of 3) has a retractable sealing device (47) and a non-retractable sealing device.
Form a bag mouth structure with (48). In this example, the retractable sealing device (47) is formed by a flap (48) that extends the full width of the bag (42), the flap extending from one upper end of the wall surface (43) and the other wall surface (43). It folds down to overlap the outer surface of (43). On the inner surface of the flap (49), spread the width of the flap (49) to the full width,
There is a sealing device (50) in the form of a sticky stripe that is joined by finger pressure, which includes a flap on the wall (43).
When it is covered with (49), separate it on the wall (43) and pull it apart.
It has a tacky surface (51) that is rebondable.

As a simple form, the non-opening / closing type sealing device (48) has a weak portion for cutting or preferably a lateral line of perforations.
This line extends when the (52) extends across the top of the overlapping wall (43) and the flap (49) is in the "closed" state.
(52) is hidden by the flap. In the preferred form, the line (52) that creates this weakening for disconnection is
It is arranged in parallel with the adhesive (50) of the open / close type sealing device. Above this parting line (52) with a non-opening seal, the wall with this line (43) is attached to the adjacent surface of the other wall (43) by a heat seal or adhesive (53). Therefore, it is desirable to fix it permanently. In this way, the only way to access the interior of the bag (42) is to break at the weakened line section of the unsealing closure (52). After that, the opening made by breaking the line (52) can be closed by the retractable sealing device (47), and the opening made by the line (52) is made by the device of the adhesive stripe (50). When closed, it is possible to avoid accidental spilling of contents from the bag (42) or intrusion of something into the bag.

Usually, the sealing flap (49) is fixed at the location of the adhesive stripe (50). When it is desired to access the bag (42), the open / close seal device (47) is shown in FIGS. 5 and 6 by grasping the free end of the end of the flap (49) with a finger and pulling it apart. The "closed" position can be changed to the "open" position shown in FIG. In this case, the non-opening / closing type sealing device appears on the surface, and can be easily torn and opened by the operation of a finger, and the bag mouth (52a) can be opened. To temporarily close the opening made in (52), the sealing flap (49)
Is moved to the “closed” position, and pressure is applied with a finger to attach a strip for opening / closing seal to the wall surface of the bag inside the opening / closing seal device (47) in a peelable manner.

FIG. 8 shows a bag in which the wall surface (55) is joined at the bottom end and the side end, much like the bag (20) in FIG. The section shows the bag (54) not permanently joined. In this example, the retractable sealing device (58)
Are attached to one inner surface of the wall (55) by a pressure-sensitive adhesive stripe (59) that is permanently affixed to and extends across the inner surface and the other inner surface of the wall (55). It consists of a sticky stripe (60) that is permanently fixed and sticks under the same pressure. Adhesive stripes (59) and (60) are aligned in parallel, and the adhesive stripes are accommodated by applying finger pressure to the exterior surface of the wall lined with stripes (59) and (60). The adhesive surface (61) to be bonded is joined with sufficient adhesive strength to temporarily close the bag mouth (57). The bag mouth (57) is a flange for pulling the upper end of the wall at the top of the retractable sealing device (58).
(62) can be easily opened by applying a finger force to pull it apart.

In the bag (54), the non-openable sealing device (63) is composed of a peel seal (64) that crosses the upper end of the bag (54) and is located inside the openable sealing device (58). . Peel seal (64)
Corresponding to the peel seal (32) shown in FIGS. 1 and 2, after the opening and closing type sealing device (58) is opened, a peeling force is applied to the pulling flange (62) to peel it off. Can be opened.

From the foregoing, in any form of the present invention, a non-openable closure device needs to be a manageable device. Throughout the device, the finger reclosable device is well below the top of the wall of the bag, and this arrangement is an advantage in that the top can be easily manipulated to open the bag.

Some non-opening and closing sealing devices also serve to hermetically seal the bag. Obviously, in any form, the bag can be accessed after the non-opening and closing device is opened. It is easily possible to find out if the non-openable sealing device can be handled easily. In order to access the non-opening and closing sealing device, the opening and closing sealing device must be opened. After the non-opening and closing sealing device is opened,
Provisional sealing of the bag is performed by reclosing the retractable sealing device.

Of course, it will be appreciated that the bag is completely closed only after the bag has been filled. For example, filling a bag
If it is desired to do so through an opening in the top of the bag, the peel-seal non-opening and sealing device is sealed after the bag is filled. On the other hand, in the case where the contents of the bag are filled from the open side or the open bottom and the part is sealed after filling, the non-opening / closing type sealing device can be closed before filling. From the wide variety of non-opening and closing closures shown here, it will be apparent that the appropriate combination needs to be selected for different specific applications.

Without departing from the spirit and scope of the new concept of the present invention,
It should be appreciated that variations and modifications can be made.

[Brief description of drawings]

FIG. 1 is a perspective view of a bag structure embodying the present invention. FIG. 2 is a detailed vertical partial sectional view taken along the line II-II in FIG. FIG. 3 is a perspective view of a modified bag structure embodying the present invention. FIG. 4 is a detailed vertical partial sectional view taken along the line IV-IV in FIG. FIG. 5 is a perspective view of another modified type of bag structure embodying the present invention. FIG. 6 is a detailed vertical sectional view taken along line VI-VI in FIG. FIG. 7 is a perspective view of the upper portion of the bag of FIGS. 5 and 6, showing the retractable sealing device in the “open” state. FIG. 8 is a vertical partial cross-sectional detail view showing the upper portion of a bag similar to the bags of FIGS. 1 and 2 with a modified retractable sealing device.

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) Bibliography Sho 53-95320 (JP, U) Steady 59-94047 (JP, U) Steady 57-134242 (JP, U)

Claims (2)

[Claims] 1. A bag having facing wall surfaces joined together and forming a space for storing articles therebetween, the bag comprising an upper end of the wall surfaces extending between facing sides of the bag. An opening in the bag formed between the two sides of the bag, extending between the two sides of the bag in a narrow space, joining the wall surfaces together sufficiently below the upper end of the upper end and first tightly closing the opening. Non-resealable non-reclosable seal opening / closing part that cannot be closed once opened again; and located below the upper end of the upper end but above the sealing part, and cannot be reclosed from the upper end at first After the opening of the non-reclosable seal peel-off opening / closing part, the pull-off opening / closing part is manually pulled to selectively open / close the opening. Open and close again A recloseable opening and closing means configured to: the recloseable opening and closing means, wherein the recloseable opening and closing means has a finger applied to the upper ends of both wall surfaces to access the non-recloseable seal peeling opening and closing part. And the non-reclosable seal peeling opening / closing part is opened after the reclosable opening / closing means is pulled and opened to completely access the space for storing the article. A bag which is opened by a pulling force subsequently applied to the upper end and in which the reclosable opening / closing means can then be closed again as the only opening / closing part of the opening of the bag. 2. The bag according to claim 1, wherein the reclosable opening / closing means includes a pressure sensitive adhesive.