Sandwich packaging body

Abstract

To provide a sandwich packaging body that improves its opening functionality.SOLUTION: A back seal portion 13 extending along both first rectangular surfaces 12A is applied to a film 11 surrounding a triangular sandwich 12. A top seal portion 17 is applied across the back seal portion 13 at a fold overlap region between the film 11, which extends outward from a first side 12d of the sandwich 12 and aligns with the first rectangular surface 12A, and lateral extension portions 14, 15. On the fold overlap region of the lateral extension portions 14, 15 of a film extension portion 18 extending outside the top seal portion 17, notches 20 are formed on both left and right sides of the back seal portion 13 at a film edge portion 24, which is a starting end of the back seal portion 13 overlapping inside the lateral extension portions 14, 15. An auxiliary seal portion 26 is formed in a predetermined area on both left and right sides, sandwiching the left and right notches 20, 20 at a film overlap portion 25.SELECTED DRAWING: Figure 3

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] In order to solve the above problems and achieve the intended purpose, the first means is: 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 the film (11) is folded along the first rectangular faces (12A) based on the side (12c) where the two first rectangular faces (12A) meet, and the back seal portion (13) is provided at the side extension of the film (11) formed in the film (11) The extensions (14, 15) are folded along the first rectangular faces (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 faces (12B) corresponding to the long sides (12a) of the sandwich (12) and the first rectangular faces (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), in a sandwich package. 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), At the film edge portion (24) covered with the lateral extensions (14, 15), tear-starting ends (20) are formed on both sides of the spine seal portion (13), and auxiliary seal portions (26, 27, 28) are formed on the left and right of the tear-starting ends (20, 20) and extend by a predetermined width toward the outside above the top seal portion (17). According to this configuration, tear initiation ends are formed on both the left and right sides of the spine seal at the film edge where the spine seal begins, so that the spine seal acts as a tearing band and is guided to tear linearly all the way to the bottom seal, allowing for smooth opening of the package. In particular, auxiliary seals are formed in predetermined areas on both the left and right sides between the two tear initiation ends, enhancing the shape retention and rigidity of the overlapping film. This prevents the tearing force from being dispersed and interrupted when tearing across the top seal, allowing for smooth tearing guidance of the film using the spine seal as a band. Furthermore, by opening along the spine seal that extends across the two first rectangular faces of the sandwich, a wide opening can be obtained. Furthermore, after opening, the contents remain in a bag-like shape, and even if a portion of the sandwich is removed for eating, the remaining sandwich is protected and contained within the bag-like film, making it hygienic. In particular, because the cut surface of the sandwich faces away from the opening, it is hygienic, and when the remaining sandwich is placed nearby, adhesives exposed on the second rectangular surface (cut surface) will not get on other things. Furthermore, because the edge of the film where the tear-starting edge is provided overlaps the inside of the folded side extension, it is possible to prevent the opening edge of the spine seal from getting caught on something and accidentally opening the package before it is sold. Furthermore, because the tear-starting edge is hidden by the side extension and not exposed, it cannot be accidentally opened, providing a tamper-resistant function.

[0008] The second means is characterized in that the auxiliary seal portions (26, 27, 28) are connected to the upper part of the top seal portion (17) and are formed in an area extending to the left and right vicinity of the tear starting end portion (20). According to this configuration, by connecting the auxiliary seal portion to the top seal portion, the shape retention and rigidity of the film overlap portion can be further improved, and tearing of the spine seal portion can be initiated more smoothly.

[0009] The third means is characterized in that the auxiliary seal portions (26, 27, 28) are formed on the outside above the top seal portion (17), with a predetermined width in the height direction, in an area from the left and right vicinity of both tear starting ends (20, 20) to the left and right ends of the film extension portion (18). This configuration further improves the shape retention and rigidity of the film overlap portion when the spine seal portion is torn open, thereby improving the ease of opening.

[0010] The fourth means is characterized in that the tear start ends (20) are formed at adjacent positions on the left and right sides of the spine seal portion (13). With this configuration, the film can be torn from both sides of the spine seal, making it easy to open.

[0011] The fifth means is characterized in that both tear starting ends (20) are formed from a V-shaped notch (20a) that expands toward the film edge (24) and a linear notch (20b) that extends slightly in the tear direction from the bottom of the V-shaped notch (20a). With this configuration, the film can be torn linearly from the tear starting end.

[0012] The sixth means is characterized in that the sandwich (12) is wrapped in a straight-cut film oriented in the extending direction of the spine seal portion (13). With this configuration, when the spine seal is torn, the film is torn in a straight line, and the spine seal can be torn in a straight line to open the package smoothly.

[0013] The seventh means is characterized in that the packaging film (11) of the sandwich (12) is subjected to a part coating treatment on the outer surface of at least the area corresponding to the position where the top seal portion (17) or the auxiliary seal portion (26, 27, 28) is formed. With this configuration, the folded-over portions of the side extensions are adhered by a part coat, maintaining the folded state, so that when the package is displayed for sale, the folded state of the side extensions is maintained and the appearance of the package is not marred. Furthermore, when the package is opened, the adhesion of the side extensions can be easily peeled off by hand, so that the beginning of the spine seal can be easily exposed by opening the side extensions to the left and right.

[0014] The eighth means is characterized in that opening guide marks (21, 22, 23) showing the procedure for tearing the film (11) to open the packaged side sandwich (12) are attached to the film (11), including number marks (21a, 22a, 23a) indicating the order in which to tear the film (11). According to this configuration, the opening procedure is clearly indicated, so that the package can be opened easily without taking time and effort. [Effects of the Invention]

[0015] According to the present invention, auxiliary seals are formed in predetermined areas on both the left and right sides of the two tear-starting edges, thereby enhancing the shape retention and rigidity of the overlapping film. When tearing across the top seal, the tearing force is not dispersed, preventing the tear from being interrupted. This allows for good tear guidance of the film, with the spine seal acting as a belt. Furthermore, after opening, the sandwich remains bag-shaped, and the remaining sandwich, even if a portion is removed for eating, is protected within the bag-shaped film, making it hygienic. Furthermore, because the edge of the film where the tear-starting edges are provided overlaps the inside of the folded side extensions, the opening start edge of the spine seal will not get caught on something and be accidentally opened before sale, providing a tamper-resistant function that prevents accidental opening. [Brief explanation of the drawings]

[0016] [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] FIG. 10 is a rear view of the packaging body, showing the state in which the overlaps of both the left and right side extension portions are 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. 10 is a schematic perspective view showing a state in which the package is being opened. [Figure 7] An explanatory diagram showing a first alternative form example of the packaging body, where (a) shows the back of the packaging body as it is displayed when selling sandwiches, and (b) shows the state in which the overlapping of both the left and right side extension portions is opened. [Figure 8] An explanatory diagram showing a second alternative form of packaging, where (a) shows the back of the packaging displayed when selling sandwiches, and (b) shows the state in which the overlapping left and right side extension portions have been opened. DETAILED DESCRIPTION OF THE INVENTION

[0017] 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]

[0018] 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 (packaging film) 11. The film 11 is preferably a transparent film made of, for example, biaxially oriented polypropylene film with a thickness of 30 to 40 μm. As shown in FIG. 4, the sandwich 12 wrapped in the film 11 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 required 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.

[0019] 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 has a welded portion (hatched portion in Figure 4) of a predetermined width in which multiple seal lines are formed in a straight line along the extension direction of the spine seal portion 13, and an unsealed portion (unhatched portion in Figure 4) on the outer edge of the welded portion where no film is welded, and the spine seal portion 13 is folded down so as to follow the film covering the first rectangular faces 12A, 12A.

[0020] 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 of the sandwich 12, near the corner of the reference side 12c, to a position beyond the corresponding first side 12d or second side 12e, and is continuous to the end of the overlapping region, without reaching the corner of the reference side 12c of the sandwich 12. Regarding each seal portion in the embodiment, the top seal portion 17 and the auxiliary seal portion 26 described below are seals with the same cross seal pattern, while the bottom seal portion 19 is a seal with multiple linear seal lines spaced closer together than the spine seal portion 13 along the second side 12e of the sandwich 12, and the side seal portion 16 is a narrow band-like seal without any seal pattern, although other seal patterns may also be used.From the viewpoint of opening the package 10, it is preferable that the top seal 16 and auxiliary seal portion 26 be cross seals with intersecting straight lines, and it is desirable that the back seal portion 13 be a seal with multiple straight seal lines along the back seal portion 13 so that it can function as an opening strip, and it is most preferable that the side seal portion 16 and bottom seal 19 be narrow linear seals with no seal lines from the viewpoint of airtightness.

[0021] 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, at the overlapping portion between the extension portion extending outward from the second edge 12e of the film 11 folded along the other first rectangular surface 12A of the sandwich 12 and the side extension portions 14, 15, a bottom seal portion 19 is formed across the entire thickness of the sandwich 12, crossing the spine seal portion 13 and the side seal portions 16, 16 of the side extension portions 14, 15, and the extended film is cut off at a position outside the bottom seal portion 19.

[0022] Package 10 is provided with an inner sheet 29 within film 11 that covers sandwich 12, directly covering second rectangular surface 12B, which is the cut surface of sandwich 12, so as to prevent adhesive substances from adhering to second rectangular surface 12B of film 11 that covers the entire sandwich 12. (In FIG. 5, the outline of inner sheet 29 is shown by a dashed line and is hatched for easy identification.) Inner sheet 29 is made of the same material as film 11 and is formed in a strip shape that is slightly narrower than sandwich 12, extending from bottom seal portion 19 to top seal portion 17.

[0023] 1(a), 2, and 3, in the film 11 that has been folded first along the first rectangular surface 12A, a film edge 24 that forms the starting end of the spine seal 13 has incisions 20 formed on both the left and right sides of the spine seal 13 as tear starting ends for opening. The incisions 20 are formed in a Y-shape by a V-shaped incision 20a that expands toward the film edge 24 and a linear incision 20b that extends slightly linearly from the bottom of the V-shaped incision 20a in the tearing direction of the linearly cut film that is torn along the extension direction of the spine seal 13, and are formed at positions close to the left and right of the spine seal 13. In other words, the positions (close positions) of the incisions 20, 20 relative to the spine seal 13 are set at positions where a tearing force is likely to be applied to the incisions 20, 20 in the tearing direction when the starting end of the spine seal 13 is pinched with fingers to start tearing. The length of linear incision 20b in incision 20 need only be such that film 11 can be torn from linear incision 20b along spine seal 13 on both sides of spine seal 13. In overlapping portion 25 (film overlapping portion) where the inner surfaces of film 11 extending outward from first side 12d along one first rectangular surface 12A of sandwich 12 and film 11 extending outward from first side 12d along second rectangular surface 12B face each other, auxiliary seal portions 26 are formed on both the left and right sides of both incisions 20, 20, in predetermined regions of predetermined width and height on the outer side above and outside top seal portion 17, and connected to the top of top seal portion 17. In the embodiment, auxiliary seal 26 is formed in the region extending to the left and right vicinity of incision 20, and is configured to enhance the shape retention and rigidity of film overlap 25 and provide good tear guidance when spine seal 13 is pinched and torn by auxiliary seal 26. In other words, the left and right vicinity of incision 20 where auxiliary seal 26 is formed is a position where auxiliary seal 26 enhances the shape retention and rigidity of film overlap 25 and provides good tear guidance when spine seal 13 is pinched and torn.Furthermore, auxiliary seal portion 26 is preferably set in a position and area that will prevent the film from being pulled and bent when torn from incisions 20, 20, thereby dispersing the tearing force and preventing tearing from being hindered. The outer surface of film 11 of package 10 is partially coated in an area (area P surrounded by a two-dot chain line in FIG. 3) corresponding to the position where top seal portion 17 and auxiliary seal portion 26 are formed, and the overlapping areas of both side extension portions 14, 15 and film 11 that has been previously folded along one of first rectangular faces 12A, where the outer surfaces face each other, are bonded by the heat used to form top seal portion 17 and auxiliary seal portion 26, thereby maintaining both side extension portions 14, 15 in a folded state along first rectangular face 12A. Furthermore, the film 11 in this embodiment is a linearly cut film oriented in the extension direction of the spine seal portion 13, and can be torn smoothly and continuously in a straight line from the incision 20 across the top seal portion 17 to the bottom seal portion 19 without interruption. The part coating treatment may be applied only to a portion of the outer surface of the film 11 within the region where the top seal portion 17 and auxiliary seal portion 26 are formed. In this embodiment, in the folded portion of the film 11 extending outward from the second side 12e of the sandwich 12, the portion where the outer surfaces of the film 11 face each other is not subjected to the same part coating treatment as that applied to the film extension portion 18 extending upward (outward) from the top seal portion 17. Therefore, a crease is formed by the pressing force during the formation of the bottom seal portion 19, and the side extension portions 14, 15 remain aligned along the first rectangular surface 12A. As with the folded portion on the top seal portion 17 side, a part coating treatment may be applied to the outer surface of the film in the area where the bottom seal portion 19 is formed, so that the film 11 is adhered by the heat used to form the bottom seal portion 19. The top seal portion 17 and the left and right auxiliary seal portions 20, 20 formed in the film overlap portion 25 are formed together by folding the side extension portions 14, 15 along the first rectangular surface 12A and sealing them in a folded state.

[0024] 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. Furthermore, as shown in Figures 2 and 3, the package 10 has guide marks 21, 22, 23 on the film 11 as opening guide marks for the package 10, which indicate the opening procedure and opening direction, etc., for opening the side extending portions 14, 15 and tearing the film extending portion 18 along the overlapping incisions 20, 20. As the opening guide marks 21, 22, 23, both number marks 21a, 22a, 23a indicating the opening order and arrow marks 21b, 22b, 23b indicating the opening direction are attached at positions corresponding to the opening locations. In the embodiment, as guide marks 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 attached with the number 1 as the step number mark 21a and the right-pointing arrow mark 21b indicating the opening direction, and the left-side lateral extension 14 is attached with the number 2 as the step number mark 22a and the left-pointing arrow mark 22b indicating the opening direction. Furthermore, guide marks 23 indicating how to tear from incision 20 are attached to film 11 corresponding to both the left and right sides sandwiching the formation position of spine seal portion 13, and guide marks 23 include number 3 as mark 23a indicating the procedure number and a downward arrow (arrow pointing from first edge 12d to reference edge 12c) as mark 23b indicating the opening direction (tear direction). In this embodiment, guide marks 21, 22 for opening left and right side extension portions 14, 15 are attached at predetermined visible positions on each of left and right side extension portions 14, 15, and guide mark 23 for tearing from incision 20 is attached inside the overlapping portion of side extension portions 14, 15, folded first along first rectangular surface 12A, and attached at a predetermined position forward in the tear direction corresponding to the formation position of incision 20.Such guidance may be selectively and suitably displayed using an arrow shape, a number display, or other symbols, or by adding a diagram or the like.

[0025] As shown in Figure 6, the package 10 of the embodiment is opened by opening the side extensions 14, 15 that are folded along one of the first rectangular faces 12A to the left and right, grasping the film extension 18 that extends outward from the film edge 24 where the top seal 17 is formed and one of the side extensions 14 with one hand, and pinching and pulling the starting end of the spine seal 13 with the fingertips of the other hand.The package 10 is then torn in a straight line along the spine seal 13, starting from both notches 20, across the top seal 17, and reaching the bottom seal 19, where the tearing stops, and the package is opened. In the package 10, incisions 20, 20 are formed on both the left and right sides of the spine seal 13 in the film edge portion 24, which forms the starting end of the spine seal 13 extending between the two first rectangular surfaces 12A, 12A of the sandwich 12. Therefore, by pinching and pulling 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 successfully torn open. In addition, the auxiliary seals 26, 26, which are formed near both the left and right sides sandwiching the two incisions 20, 20, improve the shape retention and rigidity of the film overlap portion 25 near the incisions 20, and the tearing force when tearing the spine seal 13 can be concentrated at the incisions 20, 20, allowing the spine seal 13 to begin tearing smoothly. Furthermore, incisions 20, 20 are formed adjacent to both the left and right sides of spine seal 13, and sandwich 12 is covered with a linearly cut film extending along spine seal 13. This allows film 11 to be torn from both sides of spine seal 13 for smooth opening, and allows for easy crossing of top seal 17. Spin seal 13 acts as a tearing strip, guiding the tear to the bottom seal 19 for smooth opening of package 10. Furthermore, incisions 20 are formed in a Y-shape, making the V-shaped incision 20a easy to locate, and linear incision 20b makes it easy to tear film 11 in a straight line. Furthermore, spine seal 13 has multiple seals extending along the tearing direction of spine seal 13, making spine seal 13 a strong tearing strip that provides smooth tearing guidance.Furthermore, because spine seal 13 extends in a direction intersecting the thickness direction of sandwich 12, tearing and opening can be done smoothly without applying excessive force, and because force is not applied in the thickness direction of sandwich 12, which would cause sandwich 12 to be twisted, sandwich 12 is prevented from losing its shape or becoming crushed before opening and eating package 10 of sandwich 12. Furthermore, because the opening is a narrow opening cut in a straight line, sandwich 12 does not fall out after opening and remains contained in the bag-like film, making it hygienic.

[0026] In the package 10 of the embodiment, the folded portions of the side extensions 14, 15 are adhered by a partial coating, maintaining the folded state. Therefore, when the package 10 is displayed for sale, the folded state of the side extensions 14, 15 is maintained, and the appearance of the package 10 is not impaired. Furthermore, when the package 10 is opened, the adhesion of the side extensions 14, 15 can be easily peeled off by hand, so that the beginning of the spine seal 13 can be easily exposed by opening the side extensions 14, 15 to the left and right. Furthermore, because the package 10 of the embodiment is opened along the spine seal 13, a wide opening spanning the two first rectangular faces 12A, 12A of the sandwich 12 can be obtained. After opening, the contents remain in a bag-like shape, and if only a portion is eaten, the remaining portion is protected inside the bag, making it hygienic. In particular, because second rectangular surface 12B, which forms the cut surface of sandwich 12, faces the opposite side of the opening, it is hygienic and prevents adhesive substances from second rectangular surface 12B from being exposed to the surface and accidentally sticking to the surrounding area when sandwich 12 remaining in film 11 is placed nearby. Also, because film edge 24, which forms the opening start point of spine seal 13, overlaps the inside of folded side extensions 14, 15, there is no risk of the opening start point of spine seal 13 getting caught on something and accidentally opening the package before it is sold. In particular, because the opening start point, which is the starting point for pulling spine seal 13 to tear film 11, overlaps the underside (inside) of folded side extensions 14, 15 and is hidden without being exposed to the outside (surface), it functions as tamper-resistant packaging. Furthermore, spine seal 13 acts as a tear strip, and film 11 is torn in a straight line until the end point reaches bottom seal 19, where it is blocked, leaving the torn portion without separating from film 11 (see Figure 6). Therefore, after opening, the packaging does not become separated into large and small pieces of garbage, but can be disposed of as a single lump of used packaging material, eliminating the hassle of disposal.

[0027] The packaging body 10 of the embodiment is provided with number indicators 21a, 22a, 23a indicating the opening order and arrow indicators 21b, 22b, 23b indicating the opening direction for each opening method involving tearing at the overlapping side extension portions 14, 15 and the incisions 20, 20 in the film extension portion 18. This allows the user to intuitively determine the opening order and opening direction, eliminating the need for time and effort in opening the packaging body 10. In particular, by providing the guide indicators 21, 22, 23 indicating the opening procedure on the film 11, the user can easily understand the opening method of this embodiment in which the incision 20 is hidden inside the packaging body 10. Furthermore, the packaging body 10 includes an inner sheet 29 that directly covers the second rectangular surface 12B, so that adhesives and the like on the second rectangular surface 12B do not adhere to the inner surface of the film 11, thereby preventing the packaging body 10 from impairing its appearance when displayed.

[0028] 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 seal portion 17 and bottom seal portion 19 to the end of the overlapping area.Therefore, the storage area 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.

[0029] Figures 7 and 8 show another form of packaging that uses an auxiliary seal portion with a different shape from that of the embodiment, and illustrate the back of the packaging body in a display state and the state in which the left and right side extension portions are open.

[0030] 7 and 8 show alternative auxiliary seal portions 27, 28 in which, when the left and right side extension portions 14, 15 are open (see FIGS. 7(b) and 8(b)), a plurality of seal portions 27a, 28a are formed at the film overlap portion 25 between the incisions 20, 20 and the ends of the side extension portions 14, 15, spaced apart in the width direction, extending from the film edge portion 24 to the top seal portion 17 along the tearing direction of the spine seal portion 13 or extending in a direction intersecting the tearing direction. A package 10 having alternative auxiliary seal portions 27, 28 formed therein also achieves the same effects as those of the above-described embodiment.

[0031] (Example of change) The present invention is not limited to the configurations of the examples, etc., 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 notches 20 may be formed by notches or perforations in a V-shape, or other shapes such as U-shape, semicircle, trapezoid, or C-shape. (2) The auxiliary seal portions 26, 27, 28 are not limited to those formed as a continuous seal area extending from the film edge portion 24 to the top seal portion 17 as in the examples and other embodiments, but may be formed in a predetermined area excluding the notch 20 on the outside above the top seal portion 17 with a predetermined gap, and in an area of ​​a predetermined width in the height direction up to the left and right ends of the film extension portion 18. This configuration also further improves the shape retention and rigidity of the film overlap portion when the spine seal portion 13 is torn open, thereby making it easier to open. (3) The seals formed in the spine seal portion 13 may be formed as multiple straight seals along the tearing direction from the top seal portion 17 to the bottom seal portion 19 as in the embodiment, or may be formed as checkerboard-shaped cross seals or other solid seals. (4) The bottom seal portion 19 may be formed by a welding seal. (5) The part coating process may be carried out as needed, and a film made of a material may be used in the areas where the outer surfaces of the film 11 face each other, so that the film 11 adheres (welds) to such an extent that the heat applied when forming the top seal portion 17 and the bottom seal portion 19 allows the lateral extension portions 14, 15 to be easily opened. [Explanation of symbols]

[0032] 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 15 side extension portion, 17 top seal portion, 18 film extension portion 19 bottom seal portion, 20 notch (tear starting end), 20a V-shaped notch portion 20b Linear cut portion, 21 Guidance mark (opening guide mark) 22 Information display (opening information display), 23 Information display (opening information display) 24 film edge portion, 25 film overlap portion, 26, 27, 28 auxiliary seal portion

Claims

1. a sandwich package including a film wrapped around a triangular sandwich having sides each consisting of a long side and two short sides in the thickness direction to form a cylindrical shape, the film having a back seal at a palm-shaped overlapping portion extending across two first rectangular faces of the sandwich corresponding to the short sides in the center of the thickness of the sandwich, the film being folded along the first rectangular faces at each of the first rectangular faces of the sandwich, based on the edge where the two first rectangular faces meet, to form a lateral extension of the film, which is folded along the first rectangular faces so as to overlap the previously folded film, and a horizontal seal across the back seal at the overlapping portion of the previously folded film and the lateral extension extending outward from the edge where the second rectangular face corresponding to the long side of the sandwich meets each of the first rectangular faces, to form a top seal and a bottom seal, and a film extension formed outside the top seal; 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, At the edge of the film covered by the side extensions, tear start portions are formed on both sides of the spine seal portion, and auxiliary seal portions are formed on the left and right of the tear start portions, extending by a predetermined width toward the outside above the top seal portion. A sandwich package characterized by:

2. 2. The sandwich package according to claim 1, wherein the auxiliary seal portion is connected to an upper portion of the top seal portion and is formed in an area extending to the left and right vicinity of the tear start end.

3. The sandwich packaging of claim 1, characterized in that the auxiliary seal portion is formed on the outside above the top seal portion, with a predetermined width in the vertical direction, in an area from the left and right vicinity of the two tear starting ends to the left and right ends of the film extension portion.

4. 2. The sandwich package according to claim 1, wherein the tear start ends are formed at adjacent positions on either side of the spine seal.

5. 2. The sandwich packaging of claim 1, wherein the two tear starting ends are formed from a V-shaped cut that expands toward the edge of the film and a linear cut that extends slightly in the tear direction from the bottom of the V-shaped cut.

6. 2. The sandwich package according to claim 1, wherein the sandwich is packaged in a straight-cut film oriented in the direction of extension of the spine seal.

7. The sandwich packaging body described in claim 1, characterized in that the sandwich packaging film has a part coating treatment applied to the outer surface of at least the area corresponding to the position where the top seal portion or the auxiliary seal portion is formed.

8. A sandwich package as described in any one of claims 1 to 7, characterized in that an opening guide marking indicating the procedure for tearing the film to open the packaged sandwich is attached to the film, including a number marking in the order in which it should be opened.

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