Opening forming seal

Abstract

To provide an opening forming seal which can easily open an opening section into a predetermined opening shape in such a manner of sticking the seal to a packaging film and then peeling off a predetermined portion together with the packaging film.SOLUTION: An opening forming seal 1 of the present invention includes a base material 2 with an adhesive layer 3 formed on a rear surface and a pressing plate 10 disposed at a predetermined portion of the base material 2, the base material 2 including an opening forming section 4 formed on the outside and a peeling base section 5 formed on the inside of the opening forming section 4 and surrounded with the opening forming section 4. The opening forming section 4 and the peeling base section 5 are arranged adjacent to each other through a cut section 6 formed such that the opening forming section 4 and the peeling base section 5 are freely separated from each other. The pressing plate 10 is formed in the form of a sheet having a peeling starting point section 11 made up of a corner section, and superposed on the upper surface of the peeling base section 5 so that the peeling starting point section 11 approaches a predetermined position of the cut section 6.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an opening-forming seal that is attached to a packaging film and peeled off together with the packaging film at a predetermined location to form an opening in the packaging film. [Background technology]

[0002] Conventionally, packaging bags for foods such as confectionery have used packaging films made of synthetic resin materials such as polypropylene for reasons of hygiene and preservation, and for foods in particular where it is desired to prevent the intrusion of outside air and transmitted light, aluminum-deposited films in which aluminum is vapor-deposited onto the above-mentioned packaging films have been used as packaging films to improve barrier properties.

[0003] In many cases, this type of packaging film is produced by joining a pair of edges of a rectangular sheet-shaped film base material by heat welding to form a tube with top and bottom openings, and then sealing each opening by heat welding in a position where the joined parts form the back side, thereby forming a bag made of the packaging film.

[0004] Furthermore, when eating sweets and the like, the sweets are often opened by grasping and spreading outward the front and back wrapping films near the heat-sealed opening, thereby breaking the heat-sealed joint, or by manually opening the heat-sealed joint on the back side in the same manner.

[0005] However, because the package is opened by hand, it often does not open with the intended clean opening shape depending on the amount of force used and where it is gripped. Also, when multiple people are eating the package, even if the heat-sealed joint on the back side is opened and the package is laid flat, the packaging film will experience stress as it tries to return to its sealed position, causing the opening to narrow rather than being kept wide, making it difficult to remove the contents.

[0006] In this situation, for example, a technology related to an opening label described in Patent Document 1 has been disclosed. This technology is an opening label that is attached to a packaging film for packaging a product and used when opening the film, the label having an adhesive layer on the back surface and a substrate attached to the surface of the film by the adhesive layer, the substrate having a pair of notches extending in directions intersecting each other and continuing at predetermined locations, the portion of the substrate sandwiched between the notches is separated from the other portion and serves as a pushing piece that can be pushed into the film, the tip of the pushing piece adjacent to the predetermined location serves as a breaking tip for breaking the film when being pushed, and the adhesive layer is formed so as to straddle both sides of the notches on the back surface of the substrate.

[0007] This opening label is designed to enable the film to be opened without providing a tear-inducing portion such as a cut in the packaging film. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2017-077914 A Summary of the Invention [Problem to be solved by the invention]

[0009] Indeed, the technology disclosed in Patent Document 1 is advantageous in that by attaching an opening label to any location on a packaging film, the film can be easily torn from the opening.

[0010] However, the shape of the opening obtained by breaking the film is not consistent each time, and the width of the opening cannot be controlled; the film can simply be broken easily, and it is not possible to form a clean opening that allows easy insertion of hands when multiple people are eating sweets or the like in the bag.

[0011] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide an opening-forming seal that can be attached to a packaging film and easily opened to a specified opening shape by peeling off a specified portion together with the packaging film. [Means for solving the problem]

[0012] In order to achieve the above object, the present invention provides the following:

[0013] The invention of claim 1 provides an opening-forming seal which is attached to a packaging film and formed at a predetermined location in the packaging film by peeling it off together with the packaging film, the opening-forming seal comprising a substrate having an adhesive layer formed on the back surface and a pressure plate disposed at a predetermined location on the substrate, the substrate comprising an opening-forming portion formed on the outside and a peel-off base formed inside the opening-forming portion and surrounded by the opening-forming portion, the opening-forming portion and the peel-off base being disposed adjacent to each other via a cut-out portion which is formed so that the opening-forming portion and the peel-off base can be freely separated, and the pressure plate is formed in a sheet shape having a peel-off starting point which is a corner portion and is superimposed on the upper surface of the peel-off base so that the peel-off starting point is close to a predetermined location of the cut-out portion.

[0014] The invention according to claim 2 provides the opening-forming seal according to claim 1, characterized in that the peeling base is formed in an annular or disc shape.

[0015] The invention according to claim 3 provides the opening-forming seal according to claim 1, characterized in that the peel base is formed in a spiral shape.

[0016] The invention according to claim 4 provides the opening forming seal according to claim 1, characterized in that the peelable base is formed in a substantially rectangular shape.

[0017] The invention according to claim 5 provides the opening forming seal according to any one of claims 1 to 4, characterized in that the pressing plate is formed in a substantially triangular shape. Effect of the Invention

[0018] According to the invention of claim 1, there is provided a seal which is attached to a packaging film and peeled off at a predetermined location together with the packaging film to form an opening in the packaging film, the seal comprising a substrate having an adhesive layer formed on the back surface thereof and a pressure plate disposed at a predetermined location of the substrate, the substrate comprising an opening forming portion formed on the outside and a peel base portion formed inside the opening forming portion and surrounded by the opening forming portion, the opening forming portion and the peel base portion being disposed adjacent to each other via a cutout portion formed so that the opening forming portion and the peel base portion can be separated freely, the pressure plate is formed in a sheet shape having a peel start portion consisting of a corner portion, and the cutout portion By overlapping the upper surface of the peel-off base so that the peel-off starting point is close to a predetermined location, an opening-forming seal can be attached to the surface of the packaging film where no joints have been formed by heat welding or the like, and the packaging film can be broken by pressing the pressure plate inward so that the peel-off starting point applies a load to the packaging film directly below the cut-out.Furthermore, by pulling the pressed pressure plate upward, the packaging film breaks along the cut-out, and the peel-off base can be separated from the opening-forming portion, so that the packaging film can be easily opened to the specified opening shape.

[0019] According to the invention described in claim 2, since the peel-off base is formed into a circular or disc shape, the outer end of the peel-off base has a smooth shape without corners. Therefore, by simply pushing the pressure plate inward and then pulling the peel-off base upward using the pressure plate as a base point, the peel-off base and the packaging film break along the cut portion, and a clean opening can be formed with the opening forming portion as its periphery.

[0020] According to the invention described in claim 3, the peel-off base is formed in a spiral shape, so that by simply pushing the pressure plate inward and then pulling the peel-off base upward from the pressure plate as a base point, the peel-off base and the packaging film will break in a spiral shape along the cut portion, providing fun when forming an opening, and ultimately forming a neat opening with the opening forming portion as its periphery.

[0021] According to the invention described in claim 4, the peel-off base is formed in an approximately rectangular shape, so that by simply pushing the pressure plate inward and then pulling the peel-off base upward from the pressure plate as a base point, the peel-off base and the packaging film break in an approximately linear manner along the cut portion while the peel-off base and the opening forming portion are separated at the boundary with the opening forming portion, making it possible to easily form an opening of a specified length.

[0022] According to the invention described in claim 5, the pressure plate is formed into an approximately triangular shape, which allows the formation of three peel starting points consisting of corners while having a simple shape that is easy to manufacture, so that the peel starting points can be efficiently placed close to and overlapping with predetermined locations of the cut portion. [Brief description of the drawings]

[0023] [Figure 1] 1 is a perspective view showing a state in which an opening-forming seal according to the present embodiment is attached to a packaging bag. FIG. [Diagram 2] FIG. 2A is a perspective view showing a packaging bag with an opening-forming seal attached, and FIG. 2B is a perspective view showing the state in which an opening has been formed in the packaging bag by removing the peel-off base together with the packaging film. [Diagram 3] FIG. 1A is a plan view of an opening-forming seal according to the present embodiment in which a circular peel base is formed, and FIGS. [Figure 4] 3(a) is a cross-sectional view taken along line AA of the portion of the packaging bag with an opening-forming seal attached, which corresponds to FIG. 3(a), (b) is a diagram showing the state in which the packaging film is broken by pressing in the pressure plate, and (c) is a diagram showing the state in which the pressure plate is pulled up. [Diagram 5] 1A is a plan view of an opening forming seal according to this embodiment in which the peel-off base is formed in a disk shape, and FIG. 1B is a plan view of an opening forming seal according to this embodiment in which another peel-off base is formed inside the peel-off base. [Figure 6] 1A is a plan view of an opening forming seal according to this embodiment in which a pressure plate is advanced toward the inner edge side of the opening forming portion to form an approximately annular peel-off base, and FIG. 1B is a plan view of an opening forming seal according to this embodiment in which the peel-off base of (a) is formed into a disk shape. [Figure 7] 1 is a plan view of an opening-forming seal according to an embodiment of the present invention in which the peel-off base is formed in a spiral shape. FIG. [Figure 8] 1A is a plan view of an opening forming seal according to this embodiment in which the peel-off base is divided into three parts and the center is formed into an approximately rectangular shape, and FIG. 1B is a plan view of an opening forming seal according to this embodiment in which the peel-off base is formed into an approximately rectangular shape. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] The gist of the opening-forming seal according to the present invention is a seal that forms an opening in a packaging film by sticking it to the packaging film and peeling it off together with the packaging film at a predetermined location, comprising a substrate having an adhesive layer formed on the back surface and a pressure plate disposed at a predetermined location of the substrate, the substrate comprises an opening-forming portion formed on the outside and a peeling base formed inside the opening-forming portion and surrounded by the opening-forming portion, the opening-forming portion and the peeling base are disposed adjacent to each other via a cutout portion formed so that the opening-forming portion and the peeling base can be separated freely, and the pressure plate is formed in a sheet shape having a peeling start portion made of a corner portion and is superimposed on the upper surface of the peeling base so that the peeling start portion is close to a predetermined location of the cutout portion. That is, the present invention aims to provide an opening-forming seal that can be easily opened to a predetermined opening shape by sticking it to the packaging film and peeling it off together with the packaging film at a predetermined location.

[0025] The opening forming seal 1 according to the present invention will be described below with reference to the drawings. In addition, in this description, the same reference numerals are generally used for structures and parts that are identical or symmetrical on the left and right, and only one of the left and right sides will be described, and the description of the other side will be omitted as appropriate.

[0026] As shown in Figures 2(a) and (b) and Figures 3(a) and (b), an opening forming seal 1 according to an embodiment of the present invention is a seal that is attached to a packaging film f and peeled off a predetermined portion together with the packaging film f to form an opening h in the packaging film f. The seal comprises a substrate 2 having an adhesive layer 3 formed on its back surface, and a pressure plate 10 disposed at a predetermined portion of the substrate 2. The substrate 2 comprises an opening forming portion 4 formed on its outside, and a peel base 5 formed on the inside of the opening forming portion 4 and surrounded by the opening forming portion 4. The opening forming portion 4 and the peel base 5 are disposed adjacent to each other via a cut-out portion 6 formed so that the opening forming portion 4 and the peel base 5 can be freely separated. The pressure plate 10 is formed in a sheet shape having a peel starting point 11 consisting of a corner portion, and is superimposed on the upper surface of the peel base 5 so that the peel starting point 11 is close to a predetermined portion of the cut-out portion 6.

[0027] That is, as shown in Figures 1 and 2(a), an opening forming seal 1 is attached to the packaging film f that constitutes the packaging bag P, and the packaging film f can be broken by pressing the pressure plate 10 inward so that the peel starting point 11 of the pressure plate 10 applies a load to the packaging film f directly below the cut portion 6 as shown in Figures 4(a) and (b), and further, by pulling the pressed pressure plate 10 upward as shown in Figure 4(c), the packaging film f breaks along the cut portion 6 while leaving the opening forming portion 4, and the peel base 5 can be separated from the opening forming portion 4 together with the packaging film f as shown in Figure 2(b).

[0028] The opening forming seal 1 according to this embodiment will be specifically described below with reference to the drawings.

[0029] As shown in FIG. 1, the opening forming seal 1 is composed of a base material 2 and a pressure plate 10. The base material 2 is formed from a thin sheet-like material such as a synthetic resin film material or paper material with an adhesive layer 3 formed on the back surface. The base material 2 of the opening forming seal 1 shown in FIG. 3(a) has a cut portion 6 formed therein as shown in FIG. 3(b) so that the outer circular opening forming portion 4 and the inner circular peel base portion 5 can be freely separated.

[0030] In addition, the shape of the peeling base 5 in Figure 3(a) is not limited to annular, and may be formed in a disk shape as a whole as shown in Figure 5(a).Furthermore, the opening forming portion 4 does not necessarily have to be annular, and the outer shape of the opening forming portion 4 is not important as long as it has a shape that surrounds the annular or disk-shaped peeling base 5 on the inside.

[0031] Also, as shown in FIG. 5(b), a further peeling base 5a and a pressing plate 10a may be formed inside the peeling base 5, so that the size of the opening can be selected.

[0032] As shown in Figure 3(b), the cut-out portion 6 is formed by half-cutting the base material 2 without cutting the adhesive layer 3, so that the opening forming portion 4 and the peel-off base 5 are just barely connected, and an easily peelable release paper 15 is provided below the adhesive layer 3 to facilitate handling and storage. In the following explanation, it will be assumed that the release paper 15 is provided on the adhesive layer 3, and this explanation will be omitted.

[0033] It should be noted that the cut portion 6 is not limited to this embodiment, and various modifications and variations are possible within the scope of the gist of the present invention as long as the cut portion 6 is configured to easily separate from the release base 5 when removing the release base 5. For example, as shown in FIG. 3(c), the base material 2 may be cut to a degree that does not cut the adhesive layer 3, thereby separating the opening forming portion 4 and the release base 5 in advance, or as shown in FIG. 3(d), the base material 2 may be cut down to the adhesive layer 3, thereby separating the opening forming portion 4 and the release base 5 in advance.

[0034] The pressing plate 10 is made of a synthetic resin material such as polypropylene or polyethylene with sharp corners as peel starting points 11, and by pressing the peel starting points 11 against the packaging film f, it forms the packaging film f into a sheet-like shape with a hardness and thickness sufficient to break the packaging film f. As shown in Figure 3(a), the peel starting points 11 are formed in an approximately triangular shape with three peel starting points 11, but only one peel starting point 11 is pressed.

[0035] In addition, as shown in Figures 3(a) and (b), the pressing plate 10 is superimposed on the upper surface of the peeling base 5 using a connecting material such as an adhesive so that the peeling starting point 11 forming the corner is close to a predetermined location of the cut portion 6, and in this case, the corner close to the opening forming portion 4 is pressed as the peeling starting point 11.

[0036] The shape of the pressure plate 10 is not limited to that of this embodiment, and various modifications and variations are possible within the scope of the present invention as long as the peeling starting points 11 having sharp corners are present.

[0037] In addition, the pressure plate 10 may be formed so as to extend into the inner edge of the opening forming portion 4, as shown in Figures 6(a) and (b). In this case, a cut-out portion 6 is formed along the pressure plate 10 so that the peeling base 5 is continuous with the pressure plate 10 directly below the pressure plate 10.

[0038] In addition, the base of the peeling base 5 on which the pressure plate 10 is disposed is formed to have a smooth outward curve 7, thereby preventing unintended breakage when the opening forming portion 4 and the peeling base 5 are separated.

[0039] The opening forming seal 1 of this embodiment is constructed as described above, but the shapes of the opening forming portion 4 and peeling base 5 which form the substrate 2 are not limited to those described above. For example, as in the opening forming seal 1 shown in Figure 7, the peeling base 5 may be formed in a spiral shape and a pressure plate 10 may be disposed in the center so that the packaging film f attached to the peeling base 5 can be removed in a spiral shape when opened.

[0040] Also, like the opening forming seal 1 shown in FIG. 8(a), the peelable base 5 may be divided into three parts, and the pressing plate 10 may be superimposed on the central peelable base 5.

[0041] In this case, a narrow, elongated opening is formed by peeling off the peel-off base 5 in a strip-like shape, and an opening of any size can be formed by manually breaking and removing both or either one of the peel-off bases 5b at both ends of the opening along the cut portions 6.

[0042] In addition, the base of the peeling base 5 on which the pressure plate 10 is disposed is formed to be smoothly curved outward 8, and the end side also has a portion adjacent to the opening forming portion 4 smoothly curved outward 9, thereby preventing unintended breakage when the opening forming portion 4 and the peeling base 5 are separated.

[0043] Within the scope of the present invention, the peel base 5 may be formed only in the center as in the opening forming seal 1 shown in FIG. 8(b).

[0044] As described above, the opening forming seal 1 according to this embodiment is a seal that is attached to a packaging film f and peeled off a predetermined portion together with the packaging film f to form an opening h in the packaging film f, and is made up of a base material 2 having an adhesive layer 3 formed on the back surface thereof and a pressure plate 10 disposed at a predetermined portion of the base material 2, the base material 2 is made up of an opening forming portion 4 formed on the outside and a peel base 5 formed inside the opening forming portion 4 and surrounded by the opening forming portion 4, the opening forming portion 4 and the peel base 5 are disposed adjacent to each other via a cut portion 6 formed so that the opening forming portion 4 and the peel base 5 can be separated freely, and the pressure plate 10 is a sheet-like seal having a peel start portion 11 consisting of a corner portion. and overlapping the upper surface of the peel base 5 so that the peel starting point 11 is close to a predetermined location of the cut-out portion 6. By attaching the opening-forming seal 1 to the surface of the packaging film f where no joints are formed by thermal welding or the like, and pressing the pressure plate 10 inward so that the peel starting point 11 applies a load to the packaging film f directly below the cut-out portion 6, the packaging film f can be broken. Furthermore, by pulling the pressed pressure plate 10 upward, the packaging film f breaks along the cut-out portion 6, and the peel base 5 can be separated from the opening-forming portion 4, so that the packaging film f can be easily opened to the predetermined opening shape.

[0045] Furthermore, since the peel-off base 5 is formed into a circular or disc shape, the outer end of the peel-off base 5 has a smooth shape without any corners. Therefore, by simply pushing the pressure plate 10 inward and then pulling the peel-off base 5 upward using the pressure plate 10 as a base point, the peel-off base 5 and the packaging film f break along the cut portion 6, and a clean opening can be formed with the opening forming portion 4 as its periphery.

[0046] In addition, since the peel-off base 5 is formed in a spiral shape, by simply pushing the pressure plate 10 inward and then pulling the peel-off base 5 upward from the pressure plate 10 as a base point, the peel-off base 5 and the packaging film f will break in a spiral along the cut portion 6, providing fun when forming an opening, and ultimately forming a neat opening with the opening forming portion 4 as its periphery.

[0047] In addition, since the peel-off base 5 is formed in an approximately rectangular shape, by simply pushing the pressure plate 10 inward and then pulling the peel-off base 5 upward using the pressure plate 10 as a base point, the peel-off base 5 and the packaging film f will break in an approximately linear manner along the cut portion 6 while the peel-off base 5 and the opening forming portion 4 will separate at the boundary with the opening forming portion 4, making it possible to easily form an opening of a specified length.

[0048] Furthermore, since the pressure plate 10 is formed in an approximately triangular shape, it has a simple shape that is easy to manufacture, but can form three peel starting points 11 consisting of corners, so that the peel starting points 11 can be efficiently placed close to and overlapped at predetermined locations of the cut portion 6.

[0049] Although the preferred embodiment of the opening forming seal 1 according to the present invention has been described above, the present invention is not limited to a specific embodiment, and various modifications and variations are possible. [Explanation of symbols]

[0050] f. Packaging film h aperture 1 Opening forming seal 2 Base material 3 Adhesive layer 4 Opening forming part 5. Peeling base 6 Cutting section 10 Pressure plate 11 Peeling starting point

Claims

1. A seal that is attached to a packaging film and peeled off together with the packaging film at a predetermined location to form an opening in the packaging film, The adhesive layer is formed on the back surface of a substrate, and a pressure plate is disposed at a predetermined position of the substrate. The base material includes an opening forming portion formed on the outside and a release base portion formed inside the opening forming portion and surrounded by the opening forming portion, the opening forming portion and the peeling base are disposed adjacent to each other via a cut portion formed so as to be separable from the opening forming portion and the peeling base, An opening forming seal characterized in that the pressure plate is formed in a sheet shape having a peel starting point consisting of a corner portion, and is superimposed on the upper surface of the peel base so that the peel starting point is close to a predetermined location of the cut portion.

2. The opening-forming seal according to claim 1 , wherein the peel base is formed in an annular or disc-like shape.

3. The opening forming seal according to claim 1 , wherein the peel base is formed in a spiral shape.

4. The opening forming seal according to claim 1 , wherein the peelable base portion is formed in a substantially rectangular shape.

5. 5. The opening forming seal according to claim 1, wherein the pressure plate is formed in a substantially triangular shape.

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