JPH0539073Y2 - - Google Patents

Description

[Detailed explanation of the idea] <Industrial application field> The present invention relates to bags such as envelopes.

<Prior Art> Conventionally, bags such as envelopes have been bonded together using adhesive tape or the like between a bent protruding piece formed on one side of the opening edge and an upper end of the other side of the opening edge. and sealed it. Even if such a bag is opened once, it can be resealed, so if it is opened and then sealed again, it will not be possible to identify the fact that it has already been opened, and the documents, etc. inside the bag will be lost. It was not possible to contribute to preventing loss or theft or maintaining confidentiality.

For this reason, the method described in Japanese Utility Model Publication No. 108040/1983 has been proposed. As shown in FIGS. 5 and 6, this bag body A' has a bent protruding piece 1' formed on one side of the mouth edge and an upper end 3' on the other side of the mouth edge. It is made by joining,
An adhesive 4a is applied to one of the joint surfaces, for example, the protruding piece 1' side, and the other surface, the upper end 3'
The mold release agent 8 is scattered on the side in a staggered distribution, for example, and the upper surface is further sealed by ink printing 9 across the part where the mold release agent 8 is applied and the part where it is not. 10 is painted on. By joining the protruding piece 1' and the upper end 3', the adhesive 4a on the protruding piece 1' side is bonded to the release agent 8 and the upper surface of the seal 10 on the upper end 3' side. Once the seal is sealed, when the seal is opened again, the seal 10 applied to the upper surface of the mold release agent 8 is transferred to the adhesive 4a and attached to the protruding piece 1' side.
It is designed so that it does not remain on the upper end 3' side, and by finely distributing the release agent 8, when it is re-attached after being peeled off, the transferred seal 10 is removed when the package is opened. This makes it possible to clearly identify at a glance that the package has already been opened once due to any abnormalities such as duplicates.

However, this method requires time and effort to scatter the release agent 8 and print the fine seal 10, has a complicated tamper identification structure, and has the problem of increasing costs for inexpensive bags such as envelopes.

<Problem to be solved by the invention> The problem to be solved by the invention is that once the seal is sealed and the seal is opened, the lower side of the joint surface between the protruding piece and the upper end cannot be bonded together by bending it. Or, it is difficult to adhere to the bag, and even if it is resealed, the adhesive force is weak and it easily peels off. Therefore, it is possible to create a bag that has a simple structure so that it can be clearly identified that it has already been opened. Moreover, it is to be provided at a low price.

<Means for solving the problems> The technical means taken by the present invention to solve the above problems is to provide a desired solid printing layer on one side of the tape base material from the edge in the width direction. , an adhesive layer is provided over the printed layer and the surface of the tape base exposed on the same surface as the engraved print layer, and an adhesive layer is also provided on the other surface of the tape base to form an adhesive tape. One of the two adhesive layers of the adhesive tape is attached to either the bent protruding piece formed on one side of the mouth edge of the bag body or the upper end of the other side of the mouth edge. , when the bag main body is closed, the tape is attached so that the end portion provided with the solid printing layer on the tape base material side is in a downward position, and the other adhesive layer surface is covered with release paper. It is in.

<Function> When the bag is opened from the state where the bag is sealed by the adhesive layer on both sides of the adhesive tape, the adhesive layer on the side surface of the tape base material of the adhesive tape where the solid printing layer is provided is bonded. The force causes the printed layer to be peeled off from the surface of the tape substrate together with the adhesive layer. Then, the lower side of the adhesive layer that has been peeled off from the tape base surface is covered with the printed layer portion, and the adhesive layer surface of this portion is not exposed to the surface, and the portion is bent over the protruding piece and the upper end. There is no adhesive surface at the joint surface with the part.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

In this embodiment, as shown in FIG. 1, an adhesive tape 2 is attached to the opening side of a bent protruding piece 1 formed on one side of the mouth edge of a bag body A.

The bag body A has a well-known shape in which a plastic film, paper, etc. is folded in half or overlapped to form a bag with an opening opening at the top, and a bent protruding piece 1 is formed on one side of the opening. It is. Then, the bent protruding piece 1 is folded over the upper end 3 on the other side of the mouth edge, and the two are adhered with adhesive tape 2 interposed therebetween, thereby sealing the bag body A and using it. .

In addition, this bag body A has been subjected to corona treatment on its surface, and when sealing the bag body A, the joint surface between the bent protruding piece 1 and the upper end 3 to which this is joined is coated with a material that will be described later. The adhesive layers 4, 4' on both sides of the adhesive tape 2 are designed to adhere strongly.

The adhesive tape 2 is a tape in which a solid printed layer 6 is provided on one side of a tape base material 5 in a desired width from the end in the width direction, and the tape is exposed on the printed layer 6 and on the same surface as the printed layer 6. Adhesive layer 4 over the base material 5 surface
In addition, an adhesive layer 4' is also provided on the other surface of the tape base material 5, and of both the adhesive layers 4, 4' of the adhesive tape 2, the solid surface on the tape base material 5 is The adhesive layer 4' on the side surface on which the painted printing layer 6 is not provided is placed so that when the bag main body A is closed, the end on the tape base 5 surface where the solid printing layer 6 is provided is at a lower position. (Fig. 3), adhere it to the bent protruding piece 1 side,
The surface of the other adhesive layer 4 is covered with a release paper 7 (FIG. 2). When sealing, the release paper 7 is peeled off to expose the adhesive layer 4, and the bent protruding piece 1 is folded over the upper end 3 on the other side of the mouth edge to bond them together. .

The tape base material 5 is a band-shaped material made of synthetic resin, paper, etc., and in the case of a tape base material 5 that does not have releasability, the solid printing layer 6 is made to be easier to peel than the tape base material 5, In addition, in the case of the tape base material 5 having releasability, the other side is subjected to a corona treatment or the like so that the adhesive layer 4' on the side surface where the printing layer 6 is not provided will firmly adhere. be.

The solid printing layer 6 is obtained by printing solid ink on one side of the tape base material 5 from the end in the width direction to a desired width to have a release effect that makes it easy to peel off. As shown in the figure, the adhesive layer 4 on the side on which the solid printing layer 6 is provided is provided slightly narrower than the width of the tape base material 5, so that the side edge of the printing layer 6 protrudes even slightly on the opening side. By doing so, when the bent protruding piece 1 is peeled off, it is peeled off from the printed layer 6 portion, so that the bag main body A can be opened easily.

Note that the desired width here is a width that is wide enough to clearly identify that the lower side of the joint surface between the bent protruding piece 1 and the upper end 3 is not bonded when the bag body A is opened. It refers to width.

The adhesive layers 4 and 4' are adhesive surfaces formed by applying a pressure-sensitive adhesive or the like to the tape base material 5, and have a slightly weak adhesive force on the surface of the adhesive layer 4 on which the solid printing layer 6 is provided. The adhesive layer 4' on the other side is made of a material with strong adhesive strength, or is made into a wide width material, and the adhesive strength of the adhesive layer 4 is compared to that of the adhesive layer 4'. By folding the protruding piece 1, the adhesive layer 4 having a weak adhesive force is adhered to the upper end 3 of the mouth edge of the bag body A to seal it. When the bent protruding piece 1 is peeled off and opened, the adhesive layer 4 is peeled off from the surface of the tape base material 5 of the adhesive tape 2 and transferred to the upper end 3 side. At the same time, the solid printing layer 6 is also transferred from the surface of the tape base material 5 to the adhesive layer 4 side, so that the tape base material 5 to be adhered by the adhesive layer 4' remains on the bent protruding piece 1 side. do.

Therefore, when the bag body A is unsealed from the sealed state in which the bent protruding piece 1 to which the adhesive tape 2 is attached is bonded to the upper end 3, the adhesive layer 4 bonded to the upper end 3 A solid printing layer 6 provided with a desired width on the lower side of one side of the tape base material 5 is peeled off from the surface of the tape base material 5, and the lower side of the adhesive layer 4 is covered with the printed layer 6.

Then, the tape base material 5 adhered with the adhesive layer 4' remains on the side of the bent protruding piece 1, and the lower side of the joint surface between the bent protruding piece 1 and the upper end 3 does not have an adhesive surface. Even if a sealed item is opened once and then attempted to be resealed, the portion of the solid printed layer 6 that does not have an adhesive surface will not adhere at all, or will easily peel off due to weak adhesive strength. Therefore, once the package is opened, the fact that the package has been opened can be clearly identified.

In this embodiment, as shown in the drawings, the adhesive tape 2 is attached to the adhesive layer 4 on the side surface of the tape base material 5 on which the solid printed layer 6 is not provided with respect to the bent protruding piece 1 of the bag body A. It was attached by ′, but
It may be attached to the bent protruding piece 1 by the adhesive layer 4 on the side surface on which the printed layer 6 is provided.

In addition, in this embodiment, as shown in the drawings, the adhesive tape 2 is attached to the bent protruding piece 1 side between the bent protruding piece 1 in the state before sealing and the upper end 3 on the other side of the mouth edge. The bent protruding piece 1 to which the adhesive tape 2 is attached is then folded over the upper end 3 and glued. An adhesive tape 2 may be pasted on the upper end 3 side, and the bent protruding piece 1 may be folded and adhered onto the upper end 3 to which the adhesive tape 2 is pasted.

<Effects> Since the present invention is constructed as described above, it has the following advantages.

When the bag is opened after being sealed, the adhesive force of the adhesive layer of the adhesive tape that connects the bent protruding piece of the bag body and the upper end of the other side of the mouth rim allows one side of the tape base material to be unsealed. A solid printing layer provided in a desired width from the end in the width direction,
The printed layer is peeled off from the surface of the tape base together with the adhesive layer on the same surface, and the printed layer covers the surface of the adhesive layer that has been peeled off together with the printed layer. Since it remains without an adhesive surface, even if you try to reseal the bag, it will be difficult to adhere the bottom side of the joint surface between the two due to the presence of the solid printed layer, and it will not adhere easily.Confirm this. This makes it possible to identify that the bag has already been opened once when the bag is opened.

Therefore, once the bag is opened, whether intentionally or accidentally, it can be clearly identified, which greatly contributes to preventing the loss or theft of documents inside the bag, and to maintaining confidentiality. Can be done.

When the bag is opened, the adhesive surface of the adhesive layer is covered with a solid printing layer of a desired width on the lower side of the joint surface between the bent protruding piece and the upper end of the other side of the mouth edge. However, since the adhesive surface of the adhesive layer is exposed on the upper bonding surface that is not covered by the printing layer, this section makes it difficult to reattach the adhesive layer when closing. It can be bonded and used again to store documents that do not require confidentiality.

A bag with a tamper identification structure can be realized by using an adhesive tape having a simple structure in which a solid printing layer having a desired width is provided on one side of a tape base material from the end in the width direction, The cost does not increase because of the cheap bag.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway plan view of the bag of the present invention;
Fig. 2 is a cross-sectional view of Fig. 1, Fig. 3 is a side sectional view showing the bag sealed, Fig. 4 is a side sectional view showing the bag opened after being sealed, and Fig. 5 is a side sectional view showing the bag opened after being sealed. FIG. 6 is a perspective view showing a conventional opening identification structure, and FIG. 6 is a longitudinal sectional view of FIG. 5. In addition, in the figure, A...Bag body, 1...Bent protruding piece, 2...Adhesive tape, 3...Upper end,
4,4'...adhesive layer, 5...tape base material, 6...
Solid printing layer, 7...Release paper.

Claims (1)

[Scope of utility model registration request] A solid printing layer of a desired width is provided on one side of the tape base from the end in the width direction, and an adhesive layer is provided on the print layer and on the surface of the tape base that is exposed on the same surface as the engraved printing layer. At the same time, an adhesive layer is also provided on the other surface of the tape base material to form an adhesive tape, and one of the adhesive layers in the adhesive tape is placed on one side of the mouth edge of the bag body. The end portion is provided with a solid printing layer on the tape base material surface in a state where the bag body is closed, on either the formed bent protruding piece or the upper end portion on the other side of the same mouth edge. 1. A bag characterized in that the adhesive layer is attached in a downward position, and the other adhesive layer surface is covered with a release paper.