sandwich packaging

Abstract

To provide sandwich packaging with improved opening functionality.SOLUTION: A film 11 surrounding a triangular sandwich 12 is provided with a back seal portion 13 extending along both first rectangular surfaces 12A. A top seal portion 17 is provided across the back seal portion 13 at the overlapping portion of the film 11 along the first rectangular surface 12A and side extension portions 14, 15 extending outward from a first side 12d of the sandwich 12, and a film extension portion 18 is formed outside the top seal portion 17. In the overlapping portion of the side extension portions 14, 15 of the film extension portion 18, cuts 20 are formed on both right and left sides of the back seal portion 13 at a film edge portion 24 serving as a starting end of the back seal portion 13 overlapping the inside of the side extension portions 14, 15. Guide displays 21, 22, 23 for guiding the opening method of both the side extension portions 14, 15 and the cuts 20 overlapping in the film extension portion 18 are attached to the film 11.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a package containing a triangular sandwich. [Background technology]

[0002] Conventionally, as disclosed in Patent Document 1, for example, a triangular sandwich has been used in which a film is wrapped around a triangular sandwich in the thickness direction to form a cylindrical shape, and a seal is applied in one place in the longitudinal direction of the film. The film is folded along the inclined planes, with the short sides of the sandwich being positioned as a reference, and the lateral extensions of the film that are in contact with each short side of the sandwich are folded along the inclined planes with the short sides being positioned as a reference. In this package, a seal is applied in one place in the longitudinal direction of the film that is wrapped around a triangular sandwich in the thickness direction to form a cylindrical shape, and the film is folded along the inclined planes with the short sides being positioned as a reference. A package has been proposed in which the extension portion of the film extending outward is sealed and cut near the edge, and a dot seal is applied in the thickness direction of the sandwich near the edge where the surface on which the long side of the sandwich is located meets the other inclined surface at the overlapping portion of the extension portion of the film that contacts each short side of the sandwich, and a seal separate from this dot seal is applied, and further, an opening notch of the required shape is formed in the area of ​​the extension portion of the film outside the position where the dot seal is formed and where the seal is not applied.

[0003] Furthermore, similar to Patent Document 1, Patent Document 2 proposes a packaging form with the aim of providing a packaged sandwich that is easy to open in a basic packaging form in which the film is folded along an inclined surface. According to the packaged sandwich in the packaging form of Patent Document 2, an opening aid is provided along the common side of the first and second rectangular faces, and when opening, the film is cut open along the center of the triangular sandwich, dividing the packaging sheet into two and allowing the sandwich inside to be easily removed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 7-291348 [Patent Document 2] Japanese Patent Publication No. 2022-175254 Summary of the Invention [Problem to be solved by the invention]

[0005] In the packaging configuration of Patent Document 1, when opening from the opening slit, the opening guide may be interrupted midway, making it difficult to open properly. Furthermore, in the packaging configuration of Patent Document 2, an opening aid is provided along the common edge of the first and second rectangular faces. This causes the film to tear from the top of the triangular sandwich to the center, cutting across the triangular plane intersecting the inclined face. This exposes half of the sandwich after opening. When removing and eating one of the sandwiches, the ingredients on the cut surface of the remaining sandwich (the surface obtained by cutting the square in half diagonally) may become exposed and stick to other items, creating hygiene issues. It has also been pointed out that when opening, force is applied in the twisting direction of the sandwich, which can cause the sandwich to lose its shape or become crushed. Thus, the opening functionality of the sandwich packaging configurations proposed to date leaves room for improvement.

[0006] SUMMARY OF THE INVENTION An object of the present invention is to provide a sandwich package with improved opening performance. [Means for solving the problem]

[0007] The sandwich packaging of the invention according to claim 1 of the present application is as follows: In a film (11) formed into a cylindrical shape by being wrapped around a triangular sandwich (12) having a long side (12a) and two short sides (12b) in the thickness direction, a back seal portion (13) is provided at a palm-shaped overlapping portion extending in the center of the thickness of the sandwich (12) across two first rectangular faces (12A) of the sandwich (12) corresponding to the short sides (12b), and a side extension portion of the film (11) formed by folding the film (11) along the first rectangular faces (12A) of each first rectangular face (12A) of the sandwich (12) based on the side (12c) where the two first rectangular faces (12A) meet. a sandwich package in which the first rectangular surface (12A) and the first rectangular surface (12B) are folded along the first rectangular surface (12A) so as to overlap the previously folded film (11); and a horizontal seal is applied across the spine seal (13) to the overlapping portions of the previously folded film (11) and the side extensions (14, 15) extending outward from the sides (12d, 12e) where the second rectangular surface (12B) corresponding to the long side (12a) of the sandwich (12) and the first rectangular surface (12A) meet, thereby forming a top seal (17) and a bottom seal (19), and a film extension (18) is formed outside the top seal (17), At the overlapping portion of the side extensions (14, 15) in the film extension portion (18), the film edge portion (24) which is the starting end of the spine seal portion (13) overlaps and faces the inside of the side extensions (14, 15), The film edge (24) has tear-opening start ends (20) formed on both the left and right sides of the spine seal portion (13), In the center of the top seal portion (17) in the film extension portion (18), the area on the extension of the tear from the tear-opening starting end (20) is weakly sealed, The film (11) is characterized in that the overlapping side extensions (14, 15) in the film extension (18) and the guide signs (21, 22, 23) for the opening method from the tear-open starting end (20) are attached to the side extensions (14, 15) where the top seal portion (17) is formed and to the film (11) that has been previously folded into the first rectangular surface (12A) where the side extensions (14, 15) overlap. According to the invention of claim 1, tear opening edges are formed on both the left and right sides of the spine seal at the film edge where the spine seal begins. This allows the package to be opened reliably and smoothly using the spine seal as a guide. Furthermore, by providing instructions on how to open the package, consumers can easily open it. Furthermore, a wide opening can be achieved by opening along the spine seal, which extends across the two first rectangular faces of the sandwich. After opening, the contents remain in a bag-like shape. When a portion of the sandwich is removed for consumption, the remaining portion is protected and contained within the bag-like film, ensuring hygiene. In particular, the cut surface of the sandwich faces away from the opening opening, ensuring good hygiene. When the remaining sandwich is placed nearby, adhesives exposed on the second rectangular face (cut surface) do not adhere to other surfaces. Furthermore, the film edge with the tear opening edges overlaps the inside of the folded side extensions, preventing the opening edge of the spine seal from catching on other objects and accidentally opening the package before it is sold.

[0008] The invention according to claim 2 is characterized in that the tear-opening starting end (20) is formed at a position covered by the left and right side extensions (14, 15) in the folded-over portion of the film extension (18). According to the invention of claim 2, the tear-opening starting end for opening is hidden by the side extension and not exposed, so it cannot be opened carelessly and has a tamper-proof function.

[0009] The invention according to claim 3 is characterized in that guide marks (23) that enable the tearing direction and opening order from the tear-opening starting end (20) to be determined are attached to both the left and right sides of the spine seal portion (13). According to the invention of claim 3, the tearing method for opening the tear starting end for opening is clearly displayed, so that the package can be opened easily without any time-consuming opening.

[0010] In the invention according to claim 4, the guide displays (21, 22, 23) are , openIt is characterized by including number markings (21a, 22a, 23a) indicating the sealing order. According to the invention of claim 4, the opening order is displayed by numbers, so that the packages can be opened easily without being confused about the opening order.

[0011] The invention according to claim 5 is characterized in that the weak sealing treatment is a part coating treatment. According to the invention of claim 5, the intersection between the top seal and the spine seal is weakened by part coating treatment, so that the tear guide portion from the opening start end passes through the intersection between the spine seal and the top seal without impairing the airtightness, allowing for smooth opening.

[0012] The invention of claim 6 is characterized in that each of the lateral extension portions (14, 15) is formed with a side seal portion (16) that extends from the extension end edge (14a, 15a) toward the side (12d, 12e) where the second rectangular surface (12B) and the first rectangular surface (12A) meet, and that intersects with the top seal portion (17) and the bottom seal portion (19). According to the invention of claim 6, a side seal portion is formed on each lateral extension portion, extending across the top seal portion or the bottom seal portion, thereby sealing the sandwich storage portion, preventing the sandwich bread from drying out and extending the freshness retention period of the fillings (food) sandwiched between the sandwiches longer than conventional packaging forms.

[0013] In the invention according to claim 7, the film (11) has a tear directionality that allows it to be torn open from the tear-opening starting end (20) along the spine seal portion (13). According to the invention of claim 7, the film is torn and guided so that it tears linearly from the tear starting end for opening to both sides of the spine seal portion, making opening easy and smooth. [Effects of the Invention]

[0014] According to the present invention, the spine seal portion extending across the two first rectangular faces of the sandwich acts as a tear guide band, allowing the sandwich package to be opened easily with a wide opening, and the sandwich package has improved openability, making it easy for consumers to open. [Brief explanation of the drawings]

[0015] [Figure 1] 1A and 1B are schematic perspective views showing a sandwich package, in which (a) is a view from one first rectangular surface side of the sandwich, and (b) is a view from the other first rectangular surface side of the sandwich. [Figure 2] FIG. 10 is a rear view of the package in a display state. [Figure 3] 1A and 1B are rear views of the package, in which FIG. 1A shows a state in which one of the side extensions has been opened, and FIG. 1B shows a state in which both side extensions have been opened. [Figure 4] FIG. 10 is an explanatory diagram showing the sandwich surrounded by a cylindrically formed film. [Figure 5] 3 is a schematic perspective view of the packaging body as seen from the second rectangular surface side. FIG. [Figure 6] FIG. 2 is a schematic perspective view showing the state in which the package is opened. DETAILED DESCRIPTION OF THE INVENTION

[0016] Next, a sandwich packaging body according to the present invention will be described below by way of a preferred embodiment with reference to the accompanying drawings. [Example]

[0017] FIG. 1 shows a package 10 according to an embodiment of the present invention. The package 10 is formed by tightly wrapping a triangular sandwich 12 in a transparent film 11. The film 11 may be, for example, a heat-sealable, transparent film made of biaxially oriented polypropylene film with a thickness of 30 to 40 μm. As shown in FIG. 4, the sandwich 12 wrapped in the package 10 has an isosceles triangular shape with one long side 12a and two short sides 12b, 12b on its side. The sandwich 12 is formed by stacking multiple sandwiches and has a desired thickness. As shown in FIG. 5, the package 10 is displayed in a storefront with a first rectangular surface 12A corresponding to one short side 12b of the sandwich 12 facing forward, and a second rectangular surface 12B corresponding to the long side 12a, which is the cut surface from which the contents are most visible.

[0018] 4, a transparent film 11 having a width dimension m (the dimension parallel to the long sides 12a of the sandwich 12) longer than the dimension m1 of the long sides 12a of the sandwich 12 is wrapped around the second rectangular face 12B and both side faces of the sandwich 12 to form a cylindrical shape, and a spine seal portion 13 of a predetermined width is formed at the overlapping portion extending in the longitudinal direction. The spine seal portion 13 of the cylindrical film is formed in one location in the center of the thickness direction of the sandwich 12 facing the two first rectangular faces 12A, 12A of the sandwich 12, so as to prevent the spine seal portion 13 from being exposed on the second rectangular face 12B side of the sandwich 12, which would spoil the appearance. In addition, the spine seal portion 13 is formed with a welded portion (hatched portion in Figure 4) of a predetermined width in which a crisscross seal is formed on the overlapping film in a palm-like shape, and an unsealed portion (unhatched portion in Figure 4) on the outer edge of the welded portion where the film is not welded, and the spine seal portion 13 is folded down so as to follow the film covering the first rectangular faces 12A, 12A.

[0019] As shown in Figures 1 and 3, the portions of the film 11 wrapped around the sandwich 12 that face each first rectangular surface 12A are folded along the first rectangular surface 12A based on the reference edge (edge) 12c where the first rectangular surfaces 12A, 12A meet, and the left and right lateral extension portions 14, 15, which are formed by folding back and overlapping the film 11 extending outward from the left and right short sides 12b, 12b of each first rectangular surface 12A of the sandwich 12 by folding back the film 11 facing the first rectangular surface 12A, are folded along the first rectangular surface 12A based on the short sides 12b, 12b. Each of the left and right lateral extension portions 14, 15 corresponding to each first rectangular surface 12A of the sandwich 12 has a side seal portion 16 that extends continuously in a straight line from the folded edge (extended end edge) 14a, 15a of the lateral extension portion 14, 15 toward the first edge 12d where one first rectangular surface 12A and the second rectangular surface 12B of the sandwich 12 meet or the second edge 12e where the other first rectangular surface 12A and the second rectangular surface 12B meet, at a position away from the short side 12b of the sandwich 12, and is crossed by a top seal portion 17 and a bottom seal portion 19 that become the corresponding lateral seal portions described later. The side seal portion 16 extends from the folded edges 14a, 15a of the lateral extensions 14, 15 on the reference side 12c side, near the corner of the reference side 12c of the sandwich 12, to a position beyond the corresponding first side 12d or second side 12e, and is formed continuously to the end of the overlapping region without reaching the corner of the reference side 12c of the sandwich 12. In the embodiment, the top seal portion 17, the bottom seal portion 19, and the side seal portion 16 are solid seal portions in which no seal stitches are formed.

[0020] 1, in the package 10, the left and right side extensions 14, 15 corresponding to each first rectangular surface 12A of the sandwich 12 are alternately folded along the corresponding first rectangular surface 12A of the sandwich 12 to overlap the film 11 that has been previously folded along the first rectangular surface 12A, and the side extensions 14, 15 are also folded so as to overlap each other in a predetermined region near the center where the spine seal 13 is formed. In addition, the open end of the film 11 that has previously been folded along the first rectangular surface 12A extends outward by a predetermined length from the first side 12d or the second side 12e. A top seal portion 17 is formed over the entire thickness of the sandwich 12 at the overlapping portion between the extension portion extending outward from the first side 12d of the film 11 folded along one of the first rectangular faces 12A of the sandwich 12 and the side extension portions 14, 15, and the top seal portion 17 is formed so as to cross the spine seal portion 13 and the side seal portions 16, 16 of the both side extension portions 14, 15, and a film extension portion 18 is formed extending a predetermined length outward from the top seal portion 17. Note that, for convenience, in Fig. 1, the film extension portion 18 is shown extending upward along the first rectangular face 12A, but in the display state shown in Fig. 5, the film extension portion 18 extends diagonally upward along the second rectangular face 12B. In addition, a bottom seal 19 is formed across the entire thickness of the sandwich 12 at the overlap between the extension extending outward from the second side 12e of the film 11 folded along the other first rectangular surface 12A of the sandwich 12 and the side extensions 14, 15, and across the spine seal 13 and the side seals 16, 16 of the both side extensions 14, 15, and the extended film is cut and trimmed out at a position outside the bottom seal 19. Note that the film 11 used has layers with different fusion temperatures laminated on the outer and inner surfaces of the film 11 so that the areas where the inner surfaces of the film 11 face each other and the areas where the outer surfaces face each other at the overlapping areas form a relatively weak seal when the top seal 17 and bottom seal 19 are formed.

[0021] 1(a), in the film 11 that has been folded first along the first rectangular surface 12A, linear incisions 20 are formed as tear-open starting ends on both the left and right sides of the spine seal 13 in the film edge 24 that forms the starting end of the spine seal 13. Such incisions 20 may be V-shaped, or may be U-shaped, semicircular, trapezoidal, or C-shaped incisions or notches, or short perforations. The inner surface of the film 11 of the package 10 is part-coated as a weak seal treatment to facilitate tearing of the film 11 from the incision 20 across the top seal 17, at the intersection with the spine seal 13 located in the center of the top seal 17, and in a predetermined region (see the dotted hatching in Figure 3(b)) extending from a position outside the formation position of the incisions 20, 20 formed on both sides of the spine seal 13 to beyond the top seal 17 on the extension of the tear caused by the incisions 20, 20. Furthermore, for the film 11 of the embodiment, it is preferable to use a film with tear directionality that allows for continuous, uninterrupted tearing along the spine seal 13 from the incision 20 across the top seal 17 to the bottom seal 19.

[0022] The film edge portions 24 where the incisions 20, 20 are formed overlap and face the inside of the left and right side extending portions 14, 15 at the overlapping portions with the left and right side extending portions 14, 15. In the embodiment, the incisions 20, 20 are covered by the left and right side extending portions 14, 15, and are hidden below the folded side extending portions 14, 15, not exposed on the surface, and are configured so as not to be directly touched from the outside. Also, as shown in Figures 2 and 3, the package 10 has guide signs 21, 22, 23 printed on the film 11 to guide how to open the overlapping side extending portions 14, 15 and the incisions 20, 20 at the film extending portion 18. In the embodiment, the guide indicators 21, 22, 23 are configured by combining number indicators 21a, 22a, 23a indicating the opening order and arrow indicators 21b, 22b, 23b indicating the opening direction. In the embodiment, as guide indicators for guiding the opening of the package 10 in the order of the right-side lateral extension 15, the left-side lateral extension 14, and the notches 20, 20, the right-side lateral extension 15 is provided with the number 1 as the step number indicator 21a and multiple right-pointing arrows as the arrow indicator 21b indicating the opening direction, and the left-side lateral extension 14 is provided with the number 2 as the step number indicator 22a and multiple left-pointing arrows as the arrow indicator 22b indicating the opening direction. Furthermore, guide marks 23 showing how to tear from incision 20 are attached to film 11 at positions corresponding to both the left and right sides of spine seal 13, and guide mark 23 includes procedure number mark 23a with a number 3, arrow mark 23b with a downward arrow (pointing from first edge 12d to reference edge 12c) made up of multiple triangles indicating the opening direction (tear direction), and guide character mark 23 with the word "PULL" indicating tearing. In the embodiment, guide marks 21 and 22 for left and right side extensions 14 and 15 are attached on the front side of the folded portions of film extension 18 for left and right side extensions 14 and 15, and guide mark 23 for incision 20 is attached on the front side of film 11 where incision 20, which was previously folded along first rectangular surface 12A, is formed.

[0023] In the package 10 of the embodiment, incisions 20, 20 are formed on both the left and right sides of the spine seal 13 at the film edge 24, which forms the starting end of the spine seal 13 extending between the two first rectangular faces 12A, 12A of the sandwich 12. By pinching and pulling downward the starting end of the spine seal 13 between the incisions 20, 20, the spine seal 13 acts as a tear strip, allowing the package 10 to be stably and easily torn open without the need for cutting tape. In addition, the area on the extension of the tear from the incisions 20, 20, including the intersection of the spine seal 13 and the top seal 17, is part-coated to weakly seal the top seal 17. This allows the tear guide from the incisions 20, 20 to smoothly proceed beyond the top seal 17 without impairing the hermetic seal, making it easy to open the film 11. Moreover, by using film 11 with a tear directionality that faces the tearing direction from incisions 20, 20, film 11 can be smoothly torn and guided along spine seal 13, allowing for opening. Furthermore, spine seal 13 extends in a direction that intersects with the thickness direction of sandwich 12, so that no force is applied in a direction that twists sandwich 12 when it is torn open, preventing sandwich 12 from losing its shape or becoming crushed.

[0024] As shown in FIG. 6 , the package 10 of the embodiment can be opened along the spine seal 13 to create a wide opening that spans the two first rectangular faces 12A, 12A of the sandwich 12. After opening, the contents remain in a bag-like shape, and if a portion is eaten, the remaining portion is protected inside the bag, making it hygienic. In particular, the second rectangular face 12B, which forms the cut surface of the sandwich 12, faces the opposite side of the opening, providing excellent hygiene. When the remaining sandwich 12 in the package 10 is placed nearby, adhesives on the second rectangular face 12B are not exposed and accidentally adhere to other objects. Furthermore, the film edge 24, which serves as the opening start point of the spine seal 13, overlaps the inside of the folded side extensions 14, 15, eliminating the risk of the opening start point of the spine seal 13 getting caught on something and accidentally opening the package before it is sold. In particular, the opening start edge, which is the starting point for pulling the spine seal 13 to tear the film 11, overlaps the underside (inside) of the folded side extensions 14, 15 and is hidden without being exposed to the outside (surface), so it functions as tamper-resistant packaging. Also, because the bottom seal 19 is not weakly sealed, if the spine seal 13 acts as a tear strip and tears the film 11, the tearing is stopped by the bottom seal 19, and the spine seal 13 remains without being cut off from the film 11. Therefore, the tear strip does not become separated from the container after opening and becomes waste, and it can be discarded as a lump of used packaging material, eliminating the hassle of disposal.

[0025] In the package 10 of the embodiment, guide marks 21, 22, and 23 are attached to the film 11 to guide the user through each tearing method involving the overlapping side extensions 14, 15 and the incisions 20, 20 in the film extension 18, so that opening the package 10 is not time-consuming. Furthermore, the guide marks 21, 22, and 23 are provided with numbers 21a, 22a, and 23a indicating the opening order, arrows 21b, 22b, and 23b indicating the opening direction, and letters, so that the user can intuitively determine the opening order and opening direction, and the package can be opened easily. Furthermore, the guide marks 23 indicating the tearing direction from the incisions 20, 20 are prominently attached on both the left and right sides of the spine seal 13, so that the user can immediately know how to open the package using the incisions 20, 20 and the tearing direction from the incisions 20, 20 when opening the package, and so opening the package is not time-consuming.

[0026] The packaging body 10 of the embodiment has side seal portions 16 formed on the left and right lateral extension portions 14, 15 that are folded onto each first rectangular surface 12A of the sandwich 12, which extend from the folded edges 14a, 15a of the lateral extension portions 14, 15 across the corresponding top sheet portion 17 and bottom seal portion 19 to the end of the overlapping area.Therefore, the storage portion of the sandwich 12 can be sealed by the side seal portions 16, 16, 16, 16 and the top seal portion 17 and bottom seal portion 19, which prevents the bread of the sandwich 12 from drying out and, depending on the ingredients, can extend the freshness retention period of the fillings (food) to be sandwiched, and can also extend the expiration date from manufacture to the end of sale compared to conventional bagged sandwich packaging.

[0027] (Example of change) The present invention is not limited to the configurations of the examples, and can be modified as follows, for example: Furthermore, the configurations described in the examples are not limited to the following modifications, and various embodiments can be adopted within the scope of the gist of the present invention. (1) The guide signs 21, 22, and 23 are sufficient as long as they indicate at least the order in which the packages should be opened and the direction in which they should be opened, and various other signs may be used in the form of such signs. (2) Other opening assistance processes may be provided on both the left and right sides of the spine seal portion 13, such as providing a half-cut weakened line formed by laser processing or the like so as not to penetrate the film 11 as an opening assistance section. (3) As a weak seal treatment to be performed on the top seal portion 17, instead of a part coating treatment on the film 11, a weak seal portion may be obtained in the top seal portion 17 by changing the sealing conditions when forming a weak seal portion with a seal surface shape of a heated seal body that can be weakly sealed (such as a combination of seal shapes that separate weak seal areas and normal seal areas, or by processing the seal surface into a recess corresponding to the weak seal forming portion). (4) The bottom seal portion 19 may be formed by a welding seal. (5) The tear-opening starting end 20 may not be entirely covered by the left and right lateral extensions 14, 15 depending on the extension length of the tubular film 11 wrapped around the sandwich 12 from the first side 12d and the second side 12e of the sandwich 12, and other film folding conditions. [Explanation of symbols]

[0028] 11 film, 12 sandwich, 12A first rectangular surface, 12B second rectangular surface 12a Long side, 12b Short side, 12c Reference side (the side where the two first rectangular faces meet) 12d first side, 12e second side, 13 back seal portion, 14 side extension portion 14a folded edge (extended edge), 15 lateral extension portion, 15a folded edge (extended edge) 16 Side seal part (seal part), 17 Top seal part 18 film extension portion, 19 bottom seal portion, 20 notch (tear starting end for opening) 21 Guide display, 21a Number display, 22 Guide display, 22a Number display 23 Guide mark, 23a Number mark, 24 Film edge

Claims

1. A sandwich package comprising a film wrapped around a triangular sandwich having sides each consisting of a long side and two short sides in a thickness direction to form a cylindrical shape, the film having a back seal applied to a palm-shaped overlapping portion extending in the center of the thickness of the sandwich across two first rectangular faces of the sandwich corresponding to the short sides, the film being folded along the first rectangular faces of each first rectangular face of the sandwich using the edge where the two first rectangular faces meet as a reference, to form a lateral extension of the film, which is then folded along the first rectangular face so as to overlap the previously folded film, and a horizontal seal applied across the back seal to form a top seal and a bottom seal at the overlapping portion of the previously folded film extending outward from the edge where the second rectangular face corresponding to the long side of the sandwich meets each first rectangular face, At the folded-over portion of the side extension portion of the film extension portion, the film edge portion that becomes the starting end of the spine seal portion overlaps and faces the inside of the side extension portion, tear-opening start ends are formed on both the left and right sides of the spine seal portion at the edge of the film, In the center of the top seal portion of the film extension, an area on an extension of the tear from the tear starting end for opening is weakly sealed, The film extension has overlapping side extensions and tear-opening instructions for opening the film from the tear-open starting end, which are attached to the side extensions where the top seal is formed and to the film that has been folded in advance onto the first rectangular surface where the side extensions overlap. A sandwich package characterized by:

2. 2. The sandwich package according to claim 1, wherein the tear-opening starting end is formed at a position covered by the left and right side extensions in the folded-over portion of the film extension.

3. 2. The sandwich package according to claim 1, wherein guide marks that enable the user to determine the tearing direction and opening order from the tear-starting end for opening are attached to both the left and right sides of the spine seal.

4. 2. The sandwich package according to claim 1, wherein the guide markings include numbers indicating the order in which the sandwiches are opened.

5. 2. The sandwich package according to claim 1, wherein the weak seal treatment is a part coating treatment.

6. A sandwich packaging body as described in claim 1, characterized in that each of the lateral extension portions has a side seal portion formed thereon extending from the extended end edge toward the edge where the second rectangular surface and the first rectangular surface meet, and across which the top seal portion and bottom seal portion cross.

7. The sandwich packaging according to any one of claims 1 to 6, characterized in that the film has a tear direction that allows it to be torn open from the tear-opening starting end along the spine seal.

Images