Information Concealment Sheet

Abstract

To provide an information hiding sheet in which the main body piece and the hiding piece that are adjacent to each other are peelably adhered, and which, even when peeled and opened immediately after the main body piece and the hiding piece are adhered, can leave a trace of being opened, in a manner of leaving the trace only in an area required to detect illicit opening.SOLUTION: In a structure where a main body piece 10 and a hiding piece 20 are adjacent to each other via a folding part 30, band-like opening detection parts 13 that extend respectively along an upper side and a lower side of the main body part 10 are provided, and a band-like strong adhesion part 60 is provided in an area that faces the opening detection part 13 on the hiding piece 20 when the main body piece 10 and the hiding piece 20 are folded via the folding part 30. The opening detection part 12 has multiple V-letter shaped half slits 13 formed with protruding sides facing the opposite side to the folding part 30, and half slits 14 are formed on sides of an outer periphery of the opening detection part 13.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an information concealment sheet in which a main body piece and a concealment piece that are connected to each other are detachably attached, and particularly to a technique for detecting that the main body piece and the concealment piece have been illegally peeled and unsealed from the attached state.

Background Art

[0002] As a postcard which is one of information transmission media, a round-trip postcard in which a main body piece having an information display column and a concealment piece for concealing the information displayed in the information display column are connected is used. Such a round-trip postcard can conceal the information displayed in the information display column by folding it through the connecting side of the main body piece and the concealment piece and detachably attaching the main body piece and the concealment piece by an adhesive layer laminated on the concealment piece.

[0003] However, since the adhesive layer laminated on the concealment piece is for detachably attaching the main body piece and the concealment piece, there is a risk that the main body piece and the concealment piece may be illegally peeled and unsealed from the attached state.

[0004] Here, Patent Document 1 discloses an information concealment form including a main body paper piece provided in a concealment information entry area for entering concealment information, and a concealment paper piece connected to the main body paper piece via a folding line and covering the concealment information entry area of the main body paper piece by folding back along the folding line. The outer part of the concealment information entry area of the main body paper piece is provided with a strip-shaped peeling part surrounded by a half-cut-shaped cut line along three sides excluding the folding line, and an adhesive layer part adhered along the longitudinal direction of each peeling part is provided at a part of the inner surface of the concealment paper piece covering the concealment information entry area that overlaps with the peeling part. According to this information concealment form, when the main body paper piece and the concealment paper piece are unsealed after being sealed, the peeling part will peel between the papers. Therefore, since the trace of unsealing remains due to the peeling between the papers of this peeling part, illegal unsealing can be detected.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in what is disclosed in Patent Document 1, when the main body piece of paper and the concealing piece of paper are sealed and then opened, for the peeling portion to peel between the papers, it is a major premise that the adhesive portion is strongly adhered to the peeling portion. Therefore, when opening immediately after sealing the main body piece of paper and the concealing piece of paper, there is a possibility that the peeling portion will not peel between the papers and no trace of opening will remain.

[0007] Also, in what is disclosed in Patent Document 1, in order to surely cause peeling between the papers at the peeling portion when the main body piece of paper and the concealing piece of paper are sealed and then opened, a part of the cut line is formed so as to face the adhesive layer portion. However, in that case, there is a possibility that the peeling between the papers at the peeling portion will reach the outer periphery of the main body piece of paper or the information display column. In an information concealment sheet such as a folding postcard in which a main body piece having an information display column and a concealing piece for concealing the information displayed in the information display column are connected, after the main body piece and the concealing piece are peeled off from the adhered state, mechanical processing such as mechanically reading the information displayed in the information display column may be performed. In that case, it is necessary to maintain the outer shape of the sheet, but if the peeling between the papers at the peeling portion reaches the outer periphery of the main body piece, the outer shape of the sheet cannot be maintained and mechanical processing cannot be performed, which is a problem. Also, if the peeling between the papers at the peeling portion reaches the information display column of the main body piece, there is a problem that the information displayed in the information display column cannot be viewed.

[0008] The present invention has been made in view of the problems of the conventional technology as described above, and in an information hiding sheet in which a main body piece and a hiding piece connected to each other are detachably attached, even when peeled and opened immediately after the main body piece and the hiding piece are attached, traces can be left, and an information hiding sheet capable of leaving traces of peeling and opening only in areas necessary for detecting unauthorized opening is provided.

Means for Solving the Problems

[0009] In order to achieve the above object, the present invention has a main body piece having an information display column and a hiding piece connected to the main body piece, and is folded through a connecting side of the main body piece and the hiding piece so that the information display column is on the inside and laminated on the hiding piece by an adhesive layer by which the main body piece and the hiding piece are detachably attached, the main body piece has strip-shaped opening detection portions extending along the upper side and the lower side in regions adjacent to the upper side and the lower side intersecting the connecting side on the sticking surface with the hiding piece, the hiding piece has strip-shaped strong adhesion portions in a region facing the opening detection portions when the main body piece and the hiding piece are folded through the connecting side, the opening detection portion has a first half slit which is open on the side opposite to the protruding side and has a convex shape with the protruding side facing the side opposite to the connecting side, and a plurality of the first half slits are arranged side by side along the upper side and the lower side so as to face the strong adhesion portion when the main body piece and the hiding piece are folded through the connecting side, and at least on the upper side, the lower side, and the side on the connecting side of the outer periphery of the opening detection portion, not connected to the first half slit a second half slit is formed so as to surround the plurality of first half slits.

[0010] In the present invention configured as described above, when the main body piece and the concealment piece are peeled and unsealed from the state where they are adhered by the adhesive layer, in the unsealing detection portions provided in the regions adjacent to the upper side and the lower side respectively of the adhesion surface of the main body piece with the concealment piece, since they are adhered to the strong adhesion portions provided on the concealment piece, paper separation of the main body piece occurs starting from the first half slit provided in the unsealing detection portion. At this time, the first half slit has a convex shape with the side opposite to the protruding side being open, but since the protruding side faces the side opposite to the connecting side of the main body piece and the concealment piece, that is, the peeling start end side when peeling the main body piece and the concealment piece, paper separation is likely to occur, and even when peeled and unsealed immediately after the main body piece and the concealment piece are adhered, a trace can be left. Also, the paper separation spreads to the main body piece as the main body piece tears from the opened end of the first half slit, but in the unsealing detection portion, a second half slit is formed so as to surround a plurality of the first half slits on at least the upper side, the lower side, and the side on the connecting side of the outer periphery of the unsealing detection portion. Therefore, the spread of the paper separation of the main body piece to the outside of the unsealing detection portion is avoided by the second half slit, and thereby, it is avoided that the paper separation reaches the outer periphery of the main body piece and the outer shape of the main body piece cannot be maintained, or that the paper separation reaches the information display column of the main body piece and the information displayed in the information display column cannot be viewed.

Advantages of the Invention

[0011] According to the present invention, the first half-slits provided in the unsealing detection portion of the main body piece are formed in a convex shape with an opening on the side opposite to the protruding side, and the protruding side faces the side opposite to the connecting side of the main body piece and the shielding piece and is arranged along the upper and lower sides of the main body piece. Since a plurality of them are formed side by side, paper peeling is likely to occur, and even when the main body piece and the shielding piece are peeled and unsealed immediately after being adhered, the traces can be left. Further, among the outer peripheries of the unsealing detection portion, at least on the upper side, the lower side, and the side on the connecting side, the second half-slits are formed so as to surround the plurality of first half-slits. Therefore, the peeling between the papers of the main body piece spreading outside the unsealing detection portion is avoided by the second half-slits, and thereby, the traces of peeling and unsealing can be left only in the area necessary for detecting unauthorized unsealing.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

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Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0014] FIG. 1 is a diagram showing an embodiment of the information concealment sheet of the present invention, (a) is a diagram showing one surface, (b) is a cross-sectional view taken along line A-A' shown in (a), (c) is a cross-sectional view taken along line B-B' shown in (a), and (d) is a diagram showing the other surface. FIG. 2 is a diagram showing a configuration in which the release paper 40 is peeled off from the concealment piece 20 of the concealment postcard 1 shown in FIG. 1.

[0015] As shown in FIGS. 1 and 2, in this embodiment, a concealment postcard 1 is formed by attaching a release paper 40 onto a concealment piece 20 on one surface of a base sheet 2 in which a main body piece 10 and a concealment piece 20 are connected with each side as a connecting side.

[0016] A folding portion 30 is formed on the connecting side between the main body piece 10 and the concealment piece 20 by means of a half slit, a score line, or the like, whereby the base sheet 2 can be folded via the folding portion 30.

[0017] On one surface of the main body piece 10, an information entry column 11 for entering information transmitted using this concealment postcard 1 is provided, and outside the information entry column 11, strip-shaped opening detection portions 12 extending along the upper side and the lower side of the main body piece 10 are provided in regions adjacent to the upper side and the lower side of the main body piece 10 that intersect with the folding portion 50. Note that the length in the longitudinal direction of the opening detection portion 12 is preferably 80% or more of the upper side and the lower side of the main body piece 10. Further, instead of the information entry column 11, a column on which information transmitted using this concealment postcard 1 is printed may be provided, and these may be combined into an information display column.

[0018] In the unsealing detection part 12, a V-shaped first half slit 13 with an opening on the side opposite to the protruding side is formed in a plurality along the upper and lower sides of the main body piece 10 with the protruding side facing the side opposite to the folding part 30. Along the outer peripheral side of the unsealing detection part 12, a second half slit 14 is formed so as to surround the half slit 13. These half slits 13 and 14 are formed from one surface of the base sheet 2 so as not to penetrate the base sheet 2 from the front and back, and their depths are the same as each other. For example, they are 50% to 60% of the thickness of the base sheet 2.

[0019] On the other surface of the main body piece 10, a destination information display area 16 for displaying the address, name, or title of the return destination of this concealed postcard 1 is provided.

[0020] On one surface of the concealment piece 20, in the area facing the unsealing detection part 12 when the base sheet 2 is folded through the folding part 30, an adhesive for firmly adhering the main body piece 10 and the concealment piece 20 with difficulty in peeling is applied, thereby providing a strong adhesion part 60. The strong adhesion part 60 is provided so as to face a plurality of half slits 13 when the base sheet 2 is folded through the folding part 30. Note that "difficult to peel" means that when the main body piece 10 and the concealment piece 20 are peeled by hand after being adhered, the main body piece 10 itself is torn or peeled between papers in the thickness direction, and they are adhered strongly enough. Further, on one surface of the concealment piece 20, in the area sandwiched between the two strong adhesion parts 60, for example, an adhesive with a weak adhesive force is applied, so that a pseudo-adhesive layer 50 that enables peeling of these after the main body piece 10 and the concealment piece 20 are adhered is laminated. And a release paper 40 is detachably adhered so as to cover these pseudo-adhesive layer 50 and strong adhesion part 60. Note that by printing a ground pattern or the like in the area where the pseudo-adhesive layer 50 of the concealment piece 20 is laminated, it is also conceivable to avoid the situation that the information entered in the information entry column 11 of the main body piece 10 is seen through in a state where the main body piece 10 and the concealment piece 20 are adhered. In that case, the pseudo-adhesive layer 50 will be laminated after printing a ground pattern or the like on the concealment piece 20.

[0021] The release paper 40 is provided with a destination information display area 41 on which the address, name, or title of the addressee of this concealed postcard 1 is displayed.

[0022] The usage method of the concealed postcard 1 configured as described above will be described below.

[0023] First, the usage method until the main body piece 10 and the concealed piece 20 of the concealed postcard 1 shown in FIGS. 1 and 2 are adhered will be described.

[0024] FIG. 3 is a diagram for explaining the usage method until the main body piece 10 and the concealed piece 20 of the concealed postcard 1 shown in FIGS. 1 and 2 are adhered.

[0025] After the concealed postcard 1 shown in FIGS. 1 and 2 is delivered to the addressee according to the destination information 41a displayed in the destination information display area 41 of the release paper 40 as shown in FIG. 3(a), information to be notified from the addressee of this concealed postcard 1 to the reply destination, for example, application information 11a, is entered in the information entry column 11.

[0026] Next, in order to make an application using the application information 11a entered in the information entry column 11, as shown in FIG. 3(b), the release paper 40 is peeled off from the concealed piece 20. Then, the pseudo-adhesive layer 50 and the strong adhesive portion 60 provided in the area where the release paper 40 of the concealed piece 20 was adhered are exposed.

[0027] Thereafter, as shown in FIG. 3(c), it is folded through the folding portion 30 so that the surface on which the information entry column 11 is provided faces inward, and the main body piece 10 and the concealed piece 20 are adhered by the pseudo-adhesive layer 50 and the strong adhesive portion 60. Then, it will be sent to the reply destination of the concealed postcard 1 according to the destination information 16a displayed in the destination information display area 16 of the main body piece 10. At that time, since the concealed piece 20 is adhered to the surface of the main body piece 10 on which the information entry column 11 is provided, it is possible to avoid the application information 11a entered in the information entry column 11 from being viewed during the delivery of the concealed postcard 1.

[0028] Next, the operation when the main body piece 10 and the concealment piece 20 of the concealed postcard 1 shown in FIGS. 1 and 2 are peeled off after being adhered will be described.

[0029] FIG. 4 is a diagram for explaining the operation when the main body piece 10 and the concealment piece 20 of the concealed postcard 1 shown in FIGS. 1 and 2 are peeled off after being adhered.

[0030] When the concealed postcard 1 is delivered to the destination with the main body piece 10 and the concealment piece 20 adhered as described above, as shown in FIG. 4(a), at the destination of the concealed postcard 1, in order to confirm the application information 11a entered in the information entry field 11, the main body piece 10 and the concealment piece 20 are peeled off with the end side opposite to the folding portion 30 as the peeling start end.

[0031] As the main body piece 10 and the concealment piece 20 are peeled off, in the region where the pseudo-adhesive layer 50 of the concealment piece 20 is laminated, the main body piece 10 and the concealment piece 20 are peelably adhered by the pseudo-adhesive layer 50, so that the peeling piece 20 is peeled off from the main body piece 10. On the other hand, in the region where the strong adhesive portion 60 of the concealment piece 20 is provided, the main body piece 10 and the concealment piece 20 are adhered by the strong adhesive portion 60 with difficulty in peeling, so that paper peeling occurs on the main body piece 10. And since the unsealing detection portion 12 is provided in the region facing the strong adhesive portion 60 of the main body piece 10, the main body piece 10 is peeled between papers by the unsealing detection portion 12. As shown in FIG. 4(b), a part of the main body piece 10 becomes the paper peeling portion 17b and remains adhered to the concealment piece 20 by the strong adhesive portion 60, and the paper peeling portion 17a where the paper peeling portion 17b has peeled off remains on the main body piece 10 side.

[0032] In this way, when the main body piece 10 and the concealment piece 20 of the concealed postcard 1 are peeled off after being adhered, the paper peeling portions 17a and 17b are generated by the paper peeling between the papers in the main body portion 10, so that traces of peeling and unsealing remain, and unauthorized unsealing can be detected.

[0033] Here, the operation of the half slits 13 and 14 provided in the unsealing detection portion 12 will be described.

[0034] FIG. 5 is a diagram for explaining the operation of the half slit 13 provided in the opening detection unit 12 in the concealed postcard 1 shown in FIGS. 1 and 2, and FIG. 6 is a diagram for explaining the operation of the half slit 14 provided in the opening detection unit 12 in the concealed postcard 1 shown in FIGS. 1 and 2.

[0035] As described above, the half slit 13 provided in the opening detection unit 12 has a V shape with an opening on the side opposite to the protruding side, and faces the side opposite to the folding portion 30 where the protruding side is the connecting side between the main body piece 10 and the concealed piece 20. On the other hand, since the main body piece 10 and the concealed piece 20 that are detachably attached are folded via the folding portion 30 and detachably attached, they are peeled from each other with the side opposite to the folding portion 30 as the peeling start end. Then, since the area where the half slit 13 of the opening detection unit 12 is formed is adhered to the concealed piece 20 by the strong adhesion portion 60, as shown in FIG. 5(a), the portion surrounded by the V shape of the half slit 13 starts to peel between the papers from the apex of the narrow V shape, and a part of it becomes the inter-paper peeling portion 17b and remains adhered to the concealed piece 20, while the inter-paper peeling portion 17a that has peeled between the papers remains on the main body piece 10 side.

[0036] After that, as shown in FIG. 5(b), the peeling between the papers of the main body piece 10 spreads to the main body piece 10 as the main body piece 10 tears from the open end of the half slit 13.

[0037] In this way, in the unsealing detection unit 12, the half slit 13 having a V shape with an opening on the side opposite to the protruding side is formed such that the protruding side faces the peeling start end side where the main body piece 10 and the shielding piece 20 are peeled off. This makes it easy for peeling between papers to occur, and even when the main body piece 10 and the shielding piece 20 are peeled and unsealed immediately after being adhered, the traces can be left. Also, even when the main body piece 10 and the shielding piece 20 are adhered with a weak force, the traces can be left. Further, since peeling between papers is likely to occur, even if the adhesive constituting the strong adhesive portion 60 is thinly applied to weaken the adhesive force of the strong adhesive portion 60, peeling between papers can be caused. Thereby, when information is printed on the adhering surface of the release paper 40 with the shielding piece 20, printing peeling can be prevented.

[0038] Also, as described above, the peeling between papers of the main body piece 10 spreads to the main body piece 10 as the main body piece 10 tears from the open end of the half slit 13. However, in the unsealing detection unit 12, a half slit 14 is formed on the outer peripheral side of the unsealing detection unit 12 so as to surround the half slit 13. Therefore, as shown in FIG. 6, the peeling between papers of the main body piece 10 spreading outside the unsealing detection unit 12 is avoided by the half slit 14. Thereby, it is avoided that the peeling between papers reaches the outer periphery of the main body piece 10 and the outer shape of the main body piece 10 cannot be maintained, or that the peeling between papers reaches the information entry column 11 of the main body piece 10 and the information entered in the information entry column 11 cannot be viewed.

[0039] (Other embodiments) FIG. 7 is a diagram showing another embodiment of the information shielding sheet of the present invention, (a) is a diagram showing one surface, and (b) is a diagram showing a configuration in which the release paper 40 is peeled from the shielding piece 120 shown in (a).

[0040] As shown in FIG. 7, in this embodiment, an adhesive that forms, for example, the strong adhesive portion 60 is applied in dots along the side opposite to the folded portion 30 of the concealment piece 120 with respect to what is shown in FIGS. 1 and 2, so that a plurality of dot paste portions 70 are provided, which is different from the concealment postcard 101. The release paper 40 is removably attached to the concealment piece 120 so as to cover all of the pseudo-adhesive layer 50, the strong adhesive portion 60, and the dot paste portion 70.

[0041] Even in the concealment postcard 101 configured as described above, when the main body portion 10 peels between papers at the unsealing detection portion 12 when the main body piece 10 and the concealment piece 120 are peeled off after being attached, the half slit 13 makes it easier for the main body portion 10 to peel between papers, and the spread of the peeling between papers outside the unsealing detection portion 12 is avoided by the half slit 14. Furthermore, in the concealment postcard 101 of this embodiment, a plurality of dot paste portions 70 are provided along the side opposite to the folded portion 30 of the concealment piece 120, which is the peeling start end side when the main body piece 10 and the concealment piece 120 are peeled off after being attached, so that the concealment postcard 101 is accidentally peeled and unsealed during delivery is avoided.

[0042] In the above-described embodiment, the depths of the half slits 13 and 14 are the same as each other. However, in order to surely avoid the spread of the peeling between papers caused by the half slit 13 outside the unsealing detection portion 12 by the half slit 14, it is preferable that the depth of the half slit 14 is equal to or greater than that of the half slit 13.

[0043] In the above-described embodiment, the half slit 14 is formed on the outer peripheral side edge of the unsealing detection unit 12. However, in order to avoid the paper separation occurring due to the half slit 13 from spreading outside the unsealing detection unit 12 by the half slit 14, the half slit 14 may be formed so as to surround a plurality of half slits 13 on at least the upper side, the lower side, and the side on the folding portion 30 side of the outer periphery of the unsealing detection unit 12. In that case, in order for the half slit 14 to surround all of the plurality of half slits 13, the end portion of the half slit 14 on the side opposite to the folding portion 30 is arranged so as to sandwich at least the half slit 13 that is farthest from the folding portion 30 among the plurality of half slits 13, and the half slit 14 may extend from there toward the folding portion 30 side.

[0044] In the above-described embodiment, as the half slit 13 formed in the unsealing detection unit 12, a V-shaped one with an opening on the side opposite to the protruding side was described as an example. However, in addition, as long as it has a convex shape such as a U-shaped one with an opening on the side opposite to the protruding side, the half slit 13 formed in the unsealing detection unit 12 is not limited to the V-shaped one. However, as long as it has a vertex angle like the V-shaped one, when the main body piece 10 and the concealment piece 20 are peeled off, paper separation is likely to occur at the main body piece 10 with the half slit 13 as a trigger.

[0045] FIG. 8 is a view showing another form of the half slit formed inside the unsealing detection unit 12 shown in FIGS. 1 and 7.

[0046] As the half-slits formed inside the unsealing detection unit 12, as long as the side opposite to the protruding side is open and the protruding side has a convex shape facing the side opposite to the folding portion 30, the half-slits 113, 213, 313 using arcs as shown in FIGS. 8(a) to (c), or the substantially U-shaped half-slits 413, 513 composed of three sides as shown in FIGS. 8(d) and (e) may be used. Furthermore, as shown in FIGS. 8(f) and (g), the half-slits 613, 713 using two sides intersecting on the side opposite to the folding portion 30 may also be used. In addition, in the half-slits 413, 513, 613, 713 shown in FIGS. 8(d) to (g), the portion where the two sides intersect may be rounded.

Explanation of Signs

[0047] 1,101 Concealed postcard 2 Base sheet 10 Main body piece 11 Information entry field 11a Application information 12 Unsealing detection unit 13, 14 Half-slits 16, 41 Destination information display area 16a, 41a Destination information 17a, 17b Inter-sheet peeling portion 18 Fracture portion 20, 120 Concealing piece 30 Folding portion 40 Release paper 50 Pseudo-adhesive layer 60 Strong adhesive portion 70 Dot adhesive portion

Claims

【Claim 1】 An information concealment sheet having a main body piece with an information display column and a concealment piece connected to the main body piece, and being folded so that the information display column is inside through a connecting side between the main body piece and the concealment piece and adhered to the concealment piece by an adhesive layer laminated thereon, and the main body piece and the concealment piece are detachably adhered, The main body piece has strip-shaped unsealing detection parts extending along the upper side and the lower side, each in a region adjacent to the upper side and the lower side intersecting the connecting side among the adhering surfaces with the concealment piece. The concealment piece has a strip-shaped strong adhesion part in a region facing the unsealing detection part when the main body piece and the concealment piece are folded through the connecting side. The unsealing detection part A first half slit having an opening on the side opposite to the protruding side and a convex shape with the protruding side facing the side opposite to the connecting side is formed in a plurality along the upper side and the lower side so as to face the strong adhesion part when the main body piece and the concealment piece are folded through the connecting side, and An information concealment sheet, in which a second half slit not connected to the plurality of first half slits is formed on at least the upper side, the lower side, and the side on the connecting side of the outer periphery of the unsealing detection part so as to surround the plurality of first half slits.

Images