JPH0139937B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an easy-open lid, and more particularly to an easy-open lid that is pilf-proof (i.e., not opened after filling and sealing the contents) with an opening covered with an adhesive sealing tape. Guaranteed) regarding easy-open lids.

Figures 1 and 2 show examples of conventional easy-open lids whose openings are covered with adhesive sealing tape. 1 is a conventional easy-open lid, and 2 is a panel (metallic). (or plastics, etc.), 3 indicates an opening, and 4 indicates an adhesive sealing tape. The adhesive part 5 of the adhesive tape 4 consists of an adhesive layer 6 and a base layer 7 thereon, and the grip part 8 further includes a non-adhesive film 9 on the outer surface adhered to the adhesive layer 6.
It is equipped with In such a conventional easy-open lid 1, when the knob 8 is pulled up, separation occurs between the panel part 2 and the adhesive layer 6, exposing the opening 3 and making opening easier. 5 to panel part 2
When pressed with a finger or the like, the opening 3 is sealed as before, so there is no so-called pilfer-proof property. One way to achieve pill-proofing is to tear some part of the sealing tape 4 when pulling up the knob 8. For this purpose, for example, the lid shown in FIG. When the sealing tape 4' is provided with a tear initiation cut 10 as shown in FIG. 1', the tear line 11 often passes through the opening 3, making it impossible to perform a satisfactory opening.

The present invention has been made in view of the problems of the prior art as described above, and provides a pill-proof easy-open lid whose opening is covered with an adhesive sealing tape. The purpose is to

To achieve the above object, the present invention provides an easy-open lid in which an adhesive part of a seal tape consisting of an adhesive part and a knob is adhered to cover an opening, and the adhesive part extends from an edge of the adhesive part near the knob. A tear-initiating notch and a hole are formed in the adhesive on at least one side and outside of the opening, and the hole can be opened by pulling up the tab and peeling off the adhesive. At the time of opening, the hole is provided at a position where it can merge with the tear line that advances downstream and inward in the peeling direction from the end of the tear initiation cut, and the end of the hole is located at the edge of the adhesive part. A pilfer-proof product characterized in that a tear line located above or inside the edge of the adhesive part and extending from the end does not pass through the opening.
It provides an easy-open lid.

Furthermore, the present invention provides an easy-open lid in which an adhesive part of a seal tape consisting of an adhesive part and a tab is adhered to cover an opening, and a tear-starting notch extending from an edge of the adhesive part near the tab; and a plurality of holes or a plurality of holes and a cut line are formed in the adhesive part on at least one side and outside of the opening, and the hole or the cut line is formed when the knob is pulled up. When the adhesive part is peeled off and opened, the end of the tear initiation cut or the adjacent hole upstream in the peeling direction or the end of the cut line merges with the tear line that advances inward in the downstream direction in the peeling direction. The end of the hole or cut line that is the most downstream in the peeling direction is located on the edge of the adhesive part, or the end that is inside the edge of the adhesive part. The present invention provides a pilfer-proof easy-open lid characterized in that the tear line that progresses further is provided at a position that does not pass through the opening.

The present invention will be described below with reference to drawings showing embodiments.

In Figure 4 (the same applies to the following figures), the first
Portions with the same reference numerals as those in the figures, FIGS. 2 and 3 indicate the same parts or parts with the same function.

The adhesive part 14 of the seal tape 13 of the easy-open lid 12 shown in FIG.
is formed. Furthermore, below each
One elongated rectangular hole 15 is formed outside the opening 3 so as to extend downward and outward, and its end (ie, lower end) 15a reaches the edge 14a of the adhesive portion 14. The upper long side 15b of the hole 15 is formed downwardly inwardly (in the direction of arrow A) from the end 10a of the tear initiation notch 10 when the knob 8 is pulled up and the adhesive part 14 is peeled off from the panel part 2 to open the hole. It is provided at a position where it can merge with the tear line 16 (see FIG. 7) that advances. The angle (corresponding to α in FIG. 6) between the tear line direction (that is, the direction of arrow A) and the peeling direction of the seal tape 13 (direction of arrow B) is usually within the range of about 10 to 40 degrees. The angle is determined by the material and thickness of the base layer 7, the material of the adhesive layer 6, adhesiveness, elasticity, and the peeling method (the angle between the knob 8 and the panel part 2, the peeling speed, and the deviation of the peeling direction B in the left-right direction). etc., so even if the tear line direction reaches the upper limit of the above angle, or even if it slightly exceeds the upper limit with a margin, it is possible to provide the upper long side 15a at a position where it can merge with the tear line direction. , which is preferable in order to prevent the opening from being incomplete as shown in FIG.

The layer structure of the seal tape 13 is the same as the conventional one, but the base layer 7 is made of a material that is relatively easy to tear, has gas barrier properties, and has a certain degree of strength, such as linear polyester of about 25 to 150 μm. It is preferable to use a film in which aluminum is vapor-deposited, an aluminum foil (including a film with an anticorrosive coating formed on the surface), or the like. The adhesive layer 6 is formed of a known material, such as a thin film of acrylic rubber added with rosin ester, petroleum resin, etc. as an adhesive, or an elastomer such as polyisobutylene.

When peeling off the seal tape 13 in the direction of arrow B,
The reason why the direction of the tear line (direction of arrow A) is directed downward and inward is not necessarily clear, but it is assumed to be approximately as follows. Progress during tearing when pulling up the tab 8 of the seal tape 17 on which the tear initiation notch 10 is formed and peeling it off in the direction of arrow B, as shown in FIG. 5. Figure 6 shows the observation. In FIG. 6, 8' indicates the back side of the knob 8, and 16 indicates the notch 1.
The tear line is formed by proceeding inwardly and downwardly from the end 10a of 0, and the back surface of the peeled adhesive portion exists in areas a and b. Area a is adhesive layer 6
are the parts that are adhered to the base layer 7, and in areas b and c, the peeled adhesive layer 6 is elastically stretched. This is a portion that stands out from the surface of the base layer 7 (adhered to the panel portion 2 via an adhesive layer). Therefore, the boundary line 1 between areas a and b
Reference numeral 8 denotes a front line where the adhesive layer 6 on the surface of the peeled adhesive part is peeled from the base layer 7. That front 1
8 progresses inward (ie, in the direction of arrow C) as the peeling progresses in the direction of arrow B. Therefore, as the peeling progresses downward, the portion with lower tear resistance consisting only of the base layer from which the adhesive layer 6 has been peeled off progresses inward, and this, together with the tendency for tearing to progress in a wedge shape, causes the tear line 16 to is assumed to be directed downward and inward.

FIG. 7 shows the lid 12' with the opening 3 opened after the sealing tape 13 of the lid 12 in FIG. part, wedge-shaped tear initiation incision 10
An outer periphery is formed by the lower side 10b of the hole, the tear line 16, and the upper long side 15b of the hole. That is, when the knob 8 is pulled up, first the adhesive portion above the line connecting the ends 10a of the left and right tear initiation notches peels off, and then the peeling progresses as tearing is performed from the ends 10a in the direction of arrow A. After the tear line 16 formed at this time merges with the upper long side 15b at the merging point 20, the tear line 16 formed at the lower long side 15b of the hole
The adhesive portion below c is completely peeled off, and only the residual adhesive portion 19 remains on the panel 2 without being peeled off.

As described above, since the hole 15 is formed outside the opening 3 and the end 15a of the hole 15 is on the edge 14a of the adhesive part, the residual adhesive part 19 remains on the opening 3. Complete opening is performed without any problems. Moreover, since the irregularly shaped tear line 16 is formed, even if the peeled part of the seal tape 13 is reattached to the original position on the panel 2, the existence of the irregularly shaped tear line 16 will cause , it turns out that it is once opened, and the so-called pilfer-proof property is guaranteed.

FIG. 8 shows an easy-open lid 21 according to another embodiment of the present invention, in which a plurality of elongated rectangular holes 22 are provided on one side (four in the figure).
) are provided almost parallel to each other, and the lowest hole 2
The main differences from the embodiment shown in FIG. 4 are that only the end 22a of the adhesive part 2 is located on the edge 14a of the adhesive part, and that the tear initiation cut 10 is a linear cut. During stripping, the end 22 of the upper hole 22
Since point a is inside the adhesive part 14, arrow A is
The tearing progresses in the direction, and the tearing line 16 (see FIG. 9) reaches the upper long side 22 of the hole at the confluence 20.
merge with b. After repeating the above-described peeling and tearing, a residual adhesive portion 23 as shown in FIG. 9 is formed after the peeling is completed. In this case, since the number of tear lines 16 is greater than in the case of FIG. 4, more reliable pilfer-proof properties are guaranteed.

FIG. 10 shows still another embodiment of the present invention, and the main difference between the sealing tape 13'' in FIG. 10 and the sealing tape 13' in FIG.
This is the point where a part of the hole 22 in the figure (in this case, the third hole from the top) changes to the cutting line 25, and the first
FIG. 1 shows a state in which a residual adhesive portion 26 is formed after the peeling is completed, and the mechanism for forming the residual adhesive portion 26 is almost the same as that shown in FIG. 8.

FIG. 12 shows an easy-open lid 27 of another embodiment.
In this case, the tab 8 of the seal tape 13 is located near the edge of the lid 27.
A rectangular hole 2 whose long side is parallel to the tearing direction (direction of arrow B) is located below and inwardly of the tearing start notch 10.
8. A cut line 29 parallel to the peeling direction is provided below and inwardly of the hole 28, and a right triangular hole 28' with one side parallel to the peeling direction is provided below and inwardly of the cut line 29, respectively. Arrow A from the end of the adjacent upper hole or score line
It is formed at a position where it merges with the tear line 16 (FIG. 13) advancing in the direction, and the end 2 of the hole 28'
8'a is the tear line 16 (first
3) is provided in a position that does not pass through the opening 3. FIG. 13 shows a state in which the opening 3 is exposed after the sealing tape 13 has been peeled off, and 30 is the residual adhesive portion.

FIG. 14 shows still another embodiment of the present invention, in which the openings include a circular main opening 3' and a circular auxiliary opening 3'' with a small diameter (in the center of the panel section 2). Consisting of two pieces (located nearby),
When dispensing the liquid from the main opening 3', air flows into the container from the auxiliary opening 3'' to ensure smooth dispensing. is the end 10 of the tear initiation cut 10
A plurality of (five in the figure) circular holes 32 are formed so as to be aligned in close proximity to each other on the outside of the openings 3' and 3'' from a downwardly inward direction. In this case, the tear line 16 (Fig. 15) extending from the end 32a of the upper hole 32 (at or near the lowest point in the figure) in the direction of arrow A (inwardly downward) merges with the adjacent lower hole 32. Each hole 32 is formed so that the tear line 16 extending downwardly and inwardly (in the direction of arrow A) from the end 32a of the lowest hole 32 does not pass through the opening 3'. The position of 32 is determined. Figure 15 shows the sealing tape 1.
3'''' shows the state after peeling off, and 33 is the residual adhesive portion.

The present invention is not limited to the above embodiments, and for example, the tear initiation incision 10 and the hole or the hole and the cut line may be formed only on one side of the opening. In this case, the residual adhesive portion is naturally formed only on one side. Further, the shape, number, size, inclination, etc. of the holes and the score lines can be arbitrarily determined within the range that can achieve the object of the present invention. Further, the score line does not necessarily have to penetrate the entire thickness, and in the present invention, the score line also includes a so-called score (or notch) within a range that can achieve the object of the present invention.

The easy-open lid of the present invention has the effect that pill-proofing is guaranteed because the sealing tape is torn when it is peeled off, and a residual adhesive part with irregular tear lines is formed after opening. . In addition, since the tear initiation cut and the hole or the hole and the cut line are formed in a specific positional relationship, the tear line does not pass through the opening.
This has the effect of realizing complete aperture.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an example of a conventional easy-open lid, Fig. 2 is a longitudinal cross-sectional view taken along the - line in Fig. 1,
Fig. 3 is a perspective view of an easy-open lid as a comparative example, Fig. 4 is a plan view of the lid of the first embodiment of the present invention, and Figs. 5 and 6 are drawings for explaining the tearing process. 5 is a plan view showing the state before the seal tape is peeled off, FIG. 6 is a plan view showing the state during peeling, FIG. 7 is a plan view showing the state after the lid is opened in FIG. 4, and FIG.
9 is a plan view of the lid of the second embodiment of the present invention, FIG. 9 is a plan view of the lid shown in FIG. 8 after opening, and FIG.
Figure 0 is a plan view of the lid of the third embodiment of the present invention;
1 is a plan view showing the state of the lid shown in FIG. 10 after being opened, FIG. 12 is a plan view of the lid of the fourth embodiment of the present invention, and FIG. 13 is a plan view showing the state of the lid shown in FIG. 12 after being opened. FIG. 14 is a plan view of a lid according to a fifth embodiment of the present invention, and FIG. 15 is a plan view of the lid shown in FIG. 14 after it has been opened. 3...Opening, 8...Knob, 10...Notch for starting tearing, 10a...End, 12, 21, 2
4,27,31...Easy open lid, 13,1
3', 13'', 13, 13'''''...Seal tape,
14...adhesive part, 14a...edge, 15, 22,
28, 28', 32...hole, 16...tear line,
25, 29... Cut line, 15a, 22a, 28'
a, 32a... End, B... Peeling direction.

Claims (1)

[Scope of Claims] 1. In an easy-open lid in which an adhesive part of a seal tape consisting of an adhesive part and a tab is adhered to cover an opening, a tear-starting cut extending from an edge of the adhesive part near the tab is provided. and one hole is formed in the adhesive part on at least one side and outside of the opening, and the hole can be opened by pulling up the knob and peeling off the adhesive part. It is provided at a position where it can merge with a tear line that advances toward the downstream inner side in the peeling direction from the end of the tear initiation cut,
and the end of the hole is located on the edge of the adhesive part, or is provided in a position inside the edge of the adhesive part where a tear line that advances from the end does not pass through the opening. A pill-proof, easy-open lid that is characterized by 2. In an easy-open lid in which an adhesive part of a seal tape consisting of an adhesive part and a tab is attached to cover an opening, a tear initiation notch extending from an edge of the adhesive part near the tab, and a plurality of holes are provided. A hole or a plurality of holes and a score line are formed in the adhesive part on at least one side and outside of the opening, and the hole or the score line is formed in the adhesive part by pulling up the tab. At the time of peeling and opening, a position where the end of the tear initiation incision, or an adjacent hole upstream in the peeling direction, or the end of the cut line can merge with the tear line proceeding inward in the downstream direction in the peeling direction. The end of the hole or cut line that is provided in A pill-proof easy-open lid, characterized in that the tear line is provided in a position that does not pass through the opening.