Sandwich packaging method, packaging film, and package

Abstract

To provide a sandwich packaging means which packages a sandwich in a package, is sealed, and has convenience in opening. [Solution] A method for packaging sandwiches, comprising: a first step of forming a joint in the packaging film that is rectangular, to form a tubular film body in the form of a square tube with open ends, positioning a sandwich in an intermediate portion of the longitudinal direction inside the tubular film body along the joint, with one side surface aligned with a first film surface portion and a cross-sectional portion of ingredients aligned with one of the third film surfaces; a second step of folding inward an excess portion of the tubular film body on the back surface side of the sandwich in the longitudinal direction relative to the sandwich, thereby sealing the sandwich while forming a gripping portion; and a third step of folding inward an excess portion of the tubular film body on the bottom surface side of the sandwich in the longitudinal direction relative to the sandwich, thereby sealing the sandwich.

Description

[Technical field]

[0001] The present invention relates to a method, a packaging film, and a package for packaging sandwiches. [Background technology]

[0002] Sandwiches in the shape of a roughly triangular prism sold at convenience stores and the like are generally wrapped in a wrapping film such as a plastic film for the purpose of being easy to carry and convenient. The purchaser can open the wrapping film by pulling the seal near the opening handle, take out the sandwich from inside the wrapping film, and eat it.

[0003] Here, the conventional packaging form for triangular prism-shaped sandwiches is to first mold the packaging film into a triangular prism shape to create a package that can package an approximately triangular prism-shaped sandwich, then leave one side of the package as a hollow space, insert the sandwich into the triangular prism-shaped packaging film through this hollow space, and then seal the hollow space with a part of the packaging film.

[0004] Furthermore, although there is a method for packaging sandwiches in a wrapper, when one considers the location of the opening portion, etc., this cannot be said to be an embodiment that is particularly convenient (Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 7-291348 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in conventional sandwich packaging, the sandwich is enclosed in a preformed packaging body, which creates a difference in size between the packaging body and the sandwich to be enclosed, resulting in a gap between the sandwich and the packaging film, which means that the sandwich is prone to shaking inside the packaging body when transporting the sandwich, and there is a risk that the ingredients, such as mayonnaise, of the sandwich will adhere to the ingredient covering material or the packaging body during transportation, damaging the appearance of the sandwich as a product.

[0007] The appearance of a product is important for the sale of food products. Therefore, it is desirable to seal the sandwich as close as possible with the wrapping film, to minimize the gap between the sandwich and the wrapping body, and to prevent the sandwich from shaking during transportation. In this way, it is possible to reduce the risk of the ingredients coming into contact with the wrapping film during transportation, which could result in the wrapping film becoming soiled and damaging the appearance.

[0008] Furthermore, the conventional sandwich packaging methods are not capable of completely maintaining the hermeticity of the sandwich when it is packaged. Therefore, it is impossible to eliminate the possibility of foreign matter such as dust or insects entering the packaged sandwich through gaps in the packaging. Therefore, in food packaging where it is particularly important to prevent the entry of foreign matter, a packaging method that provides a tighter seal than the conventional technology is desirable.

[0009] Furthermore, in conventional sandwich packaging, the opening surface of the sandwich that can be manipulated and opened when eating the sandwich is only one of the surfaces that make up the triangular prism of the sandwich, which is not very convenient.

[0010] In addition, in conventional sandwich packaging, the joint surface (hereinafter referred to as the joint) of the packaging film of the packaging body that covers the sandwich is located at the cut-away portion of the ingredients, the rear or back surface of the sandwich, etc. Therefore, for example, when opening the sandwich, the joint of the packaging film becomes an obstacle, and the sandwich is not easily openable. Therefore, a packaging form that is easier to open is desirable.

[0011] In addition, in the conventional sandwich packaging, when the packaging body is preformed from the packaging film, a surplus portion is generated that protrudes from the packaging body to the outside. Therefore, the conventional packaging form is not an environmentally friendly form, and a more environmentally friendly packaging form is desirable.

[0012] The present invention aims to solve the above problems. [Means for solving the problem]

[0013] The present invention relates to a method for packaging a sandwich, the method comprising the steps of: packaging a sandwich with a packaging film, the sandwich having two side surfaces shaped like a right triangle, an ingredient cross-section portion along the hypotenuse of the side surface, a sandwich back portion along one of two sides forming a right angle on the side surface, and a sandwich bottom portion along the other of the two sides; forming a joint portion by joining edges of two opposing sides of the rectangular packaging film, the method comprising the steps of: placing the sandwich in a longitudinal middle portion along the joint portion inside the tubular film body, the tubular film body having a rectangular tubular shape with open both ends, the tubular film body being formed by a first film surface portion where the joint portion is located, a second film surface portion opposed to the first film surface portion, and a pair of third film surfaces opposed to each other; a second step of folding inward an excess portion of the tubular film body on the side of the sandwich bottom surface in the longitudinal direction relative to the sandwich, while forming a gripping portion and sealing it; and a third step of folding inward an excess portion of the tubular film body on the side of the sandwich bottom surface in the longitudinal direction relative to the sandwich, wherein an opening tape stretched along the longitudinal direction is provided so as to be located on the other third film surface of the tubular film body, and in the second step, the excess portion is folded in so that the opening end of the opening tape is located at the back surface of the sandwich.

[0014] The present invention also relates to a method for packaging a sandwich, the method comprising the steps of: wrapping a sandwich with a packaging film, the sandwich having two side surfaces shaped like a right triangle, an ingredient cross-section portion along the hypotenuse of the side surface, a sandwich back portion along one of two sides forming a right angle on the side surface, and a sandwich bottom portion along the other of the two sides; forming a joint portion by joining edges of two opposing sides of the packaging film pulled from an assembly of sheet-like packaging films, thereby forming the tubular film body in advance in accordance with the size of the sandwich; placing the sandwich in a longitudinal intermediate portion along which the joint portion extends within the tubular film body, with one of the side surfaces along the first film surface portion, and placing the sandwich in the longitudinal intermediate portion along which the joint portion extends within the tubular film body; a second step of folding inward an excess portion of the tubular film body on the side of the sandwich bottom surface in the longitudinal direction relative to the sandwich to seal the sandwich, while folding inward an excess portion of the tubular film body on the side of the sandwich bottom surface in the longitudinal direction relative to the sandwich, wherein the third step of the method for packaging sandwiches includes: a first step of positioning the cross-sectional portion of the ingredient in an orientation that is aligned with one of the third film surface portions, and cutting the packaging film along a plane perpendicular to the first film surface portion, the second film surface portion, and the third film surface portion before the start of a second step; a second step of folding inward an excess portion of the tubular film body on the side of the sandwich bottom surface in the longitudinal direction relative to the sandwich to seal the sandwich, wherein an opening tape stretched along the longitudinal direction is provided so as to be located on the other third film surface portion of the tubular film body, and in the second step, the excess portion is folded in so as to position the opening end of the opening tape at the back surface of the sandwich.

[0015] Furthermore, the present invention is a method for packaging sandwiches as described in claim 1 or claim 2, characterized in that at least one of the second step and the third step includes a step of folding the first film surface portion and the second film surface portion of the packaging film covering the sandwich, with a center line formed along the longitudinal direction of the tubular film body as a tip, toward the inside of the tubular film body, and abutting the tubular film against the bottom portion of the sandwich or the back portion of the sandwich.

[0016] Furthermore, the present invention relates to a method for packaging sandwiches as described in claim 1 or claim 2, characterized in that at least one of the second step and the third step is carried out by a step of pressing a solid object against a back portion or a bottom portion of the sandwich, or moving a solid object along the back portion or the bottom portion of the sandwich, thereby forming upright portions with only both ends of the packaging film upright, folding the upright portions along the back portion or the bottom portion of the sandwich, and sealing the sandwich with the packaging film.

[0017] The present invention also relates to a packaging film for packaging sandwiches having an approximately triangular prism shape, characterized in that at a pair of opposing end edges of the packaging film, a planned joining portion for joining the opposite edges after packaging the sandwich is provided in the short direction at the end edges, the planned joining portion having a width of approximately 5 mm to approximately 20 mm, and at two sides constituting the other opposite edge not corresponding to the planned joining portion of the packaging film, a tear-open tape is provided connecting the opposite edges in an approximately straight line from one edge to the other edge, and a tear-open handle is provided in contact with the tear-open tape.

[0018] The present invention also relates to a sandwich packaging film as described in claim 5, characterized in that the printing space is arranged in advance on a part of the packaging film so that the printing space is located on the back or bottom part of the sandwich when the sandwich is packaged.

[0019] In addition, the present invention relates to a sandwich packaging film as described in claim 6, characterized in that the opening handle is located at a height position on the back part of the sandwich that is more than half the height of the sandwich when the wrapped sandwich is placed with the bottom part of the sandwich facing down.

[0020] A package in which a sandwich is placed in a bag made of a heat-sealable packaging film made of a base material made of a heat-sealable transparent plastic film or paper, either printed with letters or patterns or plain, and a thermoplastic synthetic resin layer, and the sandwich is then heat-sealed and closed, the ends of a single sheet-like packaging film being folded together to form a rectangular tubular film body, and a joint portion, which is the overlapping portion of the folded parts, is formed by bending the joint portion from the front end of the sandwich over the back surface of the sandwich, the second triangular surface portion, and the bottom surface of the sandwich, so as to follow the sandwich, and is heat-sealed along the front end and rear end of the sandwich to the front and rear ends of the sandwich of the bag formed in front of and behind the sandwich when the bag is bent. a seal portion formed by folding the sandwich back portion of the bag upward toward the inside of the bag; a fold-in portion formed by folding the sandwich bottom portion of the bag upward toward the inside of the bag; an opening trigger portion formed on the back portion of the sandwich at a height equal to or more than half the height of the sandwich when the sandwich is in an upright position with the bottom portion at the bottom; and an opening means provided from the opening trigger portion to the bottom portion and the back portion of the sandwich, the opening means being detached from the bag to open the bag. A sandwich package comprising: Effect of the Invention

[0021] By carrying out the present invention, it is possible to improve the sealing performance of the sandwich after packaging, suppress the shaking of the sandwich within the packaging film during transportation, and ensure a sufficient opening surface for the sandwich. [Brief description of the drawings]

[0022] [Figure 1] FIG. 2 is a plan view of a packaging film used in packaging a sandwich according to one embodiment of the present invention. [Diagram 2] 1 is a perspective view of a sandwich covered with a packaging film used in a packaging means for a sandwich according to one embodiment of the present invention; FIG. [Diagram 3] FIG. 2 is a flow chart illustrating a process for packaging sandwiches according to one embodiment of the present invention. [Figure 4] 1 is a perspective view of a sandwich being embedded in a packaging film to form a tubular film body during packaging by a sandwich packaging means according to one embodiment of the present invention; FIG. [Diagram 5] 1 is a perspective view of a sandwich packaging device according to an embodiment of the present invention, showing a state in which the rear surface of the sandwich is gusset-folded during packaging; FIG. [Figure 6] 1 is a perspective view of a sandwich according to an embodiment of the present invention, showing a process of packaging the sandwich with the rear portion sealed; FIG. [Figure 7] 1 is a perspective view of the bottom of a sandwich during a packaging procedure of the sandwich according to one embodiment of the present invention, in which the packaging film is being folded at the bottom of the sandwich. FIG. [Figure 8] 2 is a perspective view of the bottom of the sandwich when the bottom is sealed during a packaging procedure for the sandwich according to one embodiment of the present invention; FIG. [Figure 9] 1 is a perspective view of the bottom of a sandwich when an excess portion of the packaging film on the bottom of the sandwich is folded and fixed in a procedure for packaging the sandwich according to one embodiment of the present invention; FIG. [Figure 10] 1 is a perspective view of a sandwich after packaging according to a procedure for packaging a sandwich according to one embodiment of the present invention, viewed from the cross-section side of the ingredients. FIG. [Figure 11] 1 is a perspective view of a sandwich packaged according to a sandwich packaging procedure according to one embodiment of the present invention, taken from the rear side of the sandwich when the sandwich is being opened. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The present invention relates to a method for packaging a sandwich, the method comprising the steps of: packaging a sandwich with a packaging film, the sandwich having two side surfaces shaped like a right triangle, an ingredient cross-section portion along the hypotenuse of the side surface, a sandwich back portion along one of two sides forming a right angle on the side surface, and a sandwich bottom portion along the other of the two sides; forming a joint portion by joining edges of two opposing sides of the rectangular packaging film, the method comprising the steps of: placing the sandwich in a longitudinal middle portion along the joint portion inside the tubular film body, the tubular film body having a rectangular tubular shape with open both ends, the tubular film body being formed by a first film surface portion where the joint portion is located, a second film surface portion opposed to the first film surface portion, and a pair of third film surfaces opposed to each other; a second step of folding inward an excess portion of the tubular film body on the side of the sandwich bottom surface in the longitudinal direction relative to the sandwich, while forming a gripping portion and sealing it; and a third step of folding inward an excess portion of the tubular film body on the side of the sandwich bottom surface in the longitudinal direction relative to the sandwich, wherein an opening tape stretched along the longitudinal direction is provided so as to be located on the other third film surface of the tubular film body, and in the second step, the excess portion is folded in so that the opening end of the opening tape is located at the back surface of the sandwich.

[0024] Here, the side surface refers to the first triangular surface portion and the second triangular surface portion, and the excess portion of the packaging film refers to the grip portion, and the same area is represented by different words.

[0025] In addition, the first side refers to the side of the packaging film corresponding to the cross-section of the filling in the sandwich, the second side refers to the side of the packaging film located on the back side of the sandwich, and the third side refers to the side of the packaging film located on the bottom side of the sandwich.

[0026] In addition, in the packaging means for sandwich 2 according to one embodiment of the present invention, the two approximately triangular surfaces which are the side portions of the approximately triangular prism-shaped sandwich are called and defined as a first triangular surface portion 3 and a second triangular surface portion 6, respectively.

[0027] In addition, in the sandwich packaging means of one embodiment of the present invention, the surface of the approximately triangular prism-shaped sandwich from which the approximately rectangular sandwich fillings are exposed, which is a surface formed by including the base of the triangle of the triangular-shaped first surface portion 3 of the approximately triangular prism-shaped sandwich and the base of the triangle with the triangular-shaped second surface portion 6, is called and defined as filling cross-section portion 4 (Figure 11).

[0028] In addition, in the sandwich packaging means of one embodiment of the present invention, the approximately rectangular shaped surfaces of the approximately triangular prism-shaped sandwich, which include the hypotenuse 55 of the triangular shaped first surface portion 3 and the triangular shaped second surface portion 6, are called and defined as the sandwich back surface portion 22 and the sandwich bottom surface portion 23, respectively.

[0029] In addition, in the sandwich packaging means according to one embodiment of the present invention, the side portion of the approximately triangular prism-shaped sandwich 2 common to the sandwich back surface 22 and the sandwich bottom surface 23 is called and defined as the top portion 24 .

[0030] [1. Regarding the sandwich packaging film according to one embodiment of the present invention] First, the shape of the sandwich to be packaged and the packaging film of the sandwich according to one embodiment of the present invention will be described. The sandwich 2 according to one embodiment of the present invention is intended for a sandwich having a substantially triangular shape, such as those very commonly sold at convenience stores, for example. In addition, in the sandwich packaging method according to one embodiment of the present invention, even if the shape of the sandwich is substantially rectangular, packaging is possible, although the sealing manner of the back surface of the sandwich and the rear surface of the sandwich is different.

[0031] Moreover, in packaging the sandwich according to one embodiment of the present invention, a packaging film 1 is used to function as a package for packaging the sandwich 2. One example of the material of the packaging film 1 is a polymeric organic compound including plastic. Specifically, the polymeric organic compound is polypropylene (PP), polyester (PET), nylon (PA), polyethylene (PE), or the like. However, the packaging film 1 is not limited to polymeric organic compounds such as plastic, and may be paper, or the like.

[0032] Also, for example, as one mode of preparation of the packaging film 1 at the stage before packaging, the packaging film 1 is cut into a substantially rectangular shape to a size capable of packaging one sandwich 2. At this time, the packaging film 1 may be in a form in which a single sheet of the packaging film 1 to be used is pulled out from a roll film, which is a continuous roll-like bundle of packaging films 1, just before packaging the sandwich, and the packaging film is cut to an appropriate length for use.

[0033] One embodiment of the packaging film 1 is shown in Fig. 1. As shown in Fig. 1, one embodiment of the packaging film 1 is a film-like packaging film 1 with a length of about 300 mm and a width of about 300 mm, which is capable of appropriately packaging a typical sized sandwich (the length of one side other than the base of the triangular surface is about 150 mm).

[0034] The packaging film 1 has intended joining portions 36 at end portions 35 that are two opposing sides (the left and right sides in the figure) of the packaging film 1, where the end portions 35 are welded and anchored. The intended joining portions 36 are an area of ​​one side of the packaging film 1, with a combined width of about 5 mm to 20 mm and a length of about 5 mm to 20 mm, and after the sandwich 2 is placed thereon, welding is performed at these portions, allowing the sandwich 2 to be enclosed.

[0035] 1, an opening tape 29 is disposed near the left side of the packaging film 1, extending from an upper edge 40 to a lower edge 41 of the packaging film. A purchaser of sandwich 2 can open sandwich 2 by pulling opening tape 29, which tears packaging film 1 as opening tape 29 is pulled out.

[0036] Also, on the opening tape 29 on the left side of the packaging film 1, a opening tape 17 having an opening handle 50 and an opening cut 51 is disposed so as to abut against the opening tape 29. The user first grasps the opening handle 50 with his / her fingers as a knob and pulls along the direction in which the opening tape 29 is disposed, whereby the packaging film 1 is torn at the opening cut 51 provided in advance, and the user can open the package using the opening tape 29.

[0037] 1, the opening tape 29 is provided on the left side of the packaging film 1, but since the opening tape 29 is provided on both sides of the sandwich back surface 22 and the sandwich bottom surface 23 after packaging, the configuration of the packaging film 1 may be various, and the opening tape 29 may be provided on the right side of the packaging film 1. Also, although the opening tape 17 is provided on the lower left of FIG. 1, since the opening tape 17 is disposed on the sandwich back surface or the sandwich bottom surface 23 after packaging, the position of the opening tape 17 may be various.

[0038] In addition, although printing space 42 is provided approximately near the center of packaging film 1 in Figure 1, it may have various shapes in terms of size, frame shape, arrangement, etc., as long as it fits appropriately on either side after sandwich 2 is packaged and the characters in printing space 42 can be properly viewed.

[0039] The names of ingredients of the product can be printed and written in advance in the printing space 42. Therefore, it is possible to omit the display of ingredients by using labels such as stickers.

[0040] The triangular prism-shaped sandwich 2 to be packaged is intended to be a sandwich having a triangular prism structure in which the triangular surface of the sandwich 2 is a substantially right-angled isosceles triangle. However, as long as the overall shape of the sandwich 2 is a triangular prism, the shape of the triangular surface of the sandwich 2 is not limited to a substantially right-angled isosceles triangle, and packaging can also be performed in, for example, an equilateral triangle.

[0041] 2. Packaging procedure for sandwiches according to one embodiment of the present invention Next, a procedure for packaging a sandwich according to one embodiment of the present invention will be described with reference to the flow chart of Fig. 3. First, packaging film 1 is spread and arranged so as to be approximately parallel to a horizontal plane (step S1).

[0042] Then, the sandwich 2 is placed on the unfolded packaging film 1 (step S2). At this time, the sandwich 2 is placed with the first triangular surface portions 3 of the two triangular surfaces of the triangular prism-shaped sandwich 2 facing downward. For convenience, the triangular surface that is the side surface of the sandwich 2 that abuts the approximate center of the packaging film 1 is referred to and defined as the first triangular surface portion 3.

[0043] Regarding steps S1 and S2, the process of bringing the packaging film 1 into contact with the sandwich 2 may be in another manner that leads to the same result. That is, as another manner, the packaging film 1 may be covered from above and brought into contact with the sandwich 2 by covering the vicinity of the center of the packaging film 1 with the triangular first surface portion 3 located on the upper surface of the sandwich 2 (FIG. 2).

[0044] Then, packaging film 1 is folded to cover sandwich 2 (step S3). At this time, packaging film 1 is folded so as to abut along ingredient cross section portion 4, top end portion 24, and triangular second surface portion 6 of sandwich 2. Therefore, when sandwich 2 is entirely covered with packaging film 1, packaging film 1 becomes a roughly rectangular prism-shaped cylinder with sandwich 2 embedded therein (FIG. 4). This roughly rectangular prism-shaped cylinder will be referred to hereinafter as tubular film body 25.

[0045] Then, the joint portions 36, which are the covering portions between the end side portions 35 of the packaging film 1, are joined by the first triangular surface portion 3 of the sandwich 2, completing the tubular film body 25 (step S4). The joint portions 36 of the packaging film 1 are joined by, for example, thermal welding using heat. The joint portions 36 of the packaging film 1 are then brought into close contact with each other, forming joint portions 7. Through the above process, the tubular film body 25 is completed.

[0046] The tubular film body 25 in which the sandwich 2 is embedded has a joint 7 and is composed of a first film surface portion 56 covering the second surface portion 6 of the triangular shaped surface, a second film surface portion 57 covering the first surface portion 3 of the triangular shaped surface, a third film surface portion 58 covering the top end portion 24, and a third film surface portion 58 covering the cross-sectional portion 4 of the ingredient.

[0047] Here, the joints 7 are welded by heat welding and therefore have sufficient adhesion, so there is almost no risk of foreign matter entering through the joints 7. That is, when the tubular film body 25 is completed, only the spaces at the front and rear of the tubular film body 25 (the rear space 32 and the bottom space 33) are open, and the other parts are sealed off from the outside.

[0048] Next, the packaging film 1 on the sandwich back side 8 of the sandwich 2 is adhered by gusset folding (FIG. 5, step S5). One example of the mechanism of the gusset folding in step S5 is a mode in which the first film surface portion 56 and the second film surface portion 57 are folded, and the second film surface portion 57 of the tubular film body 25 and the first film surface portion 56 of the tubular film body 25 are folded toward the inside of the tubular film body 25 so that a crease is formed in the vicinity of the central axis parallel to the longitudinal direction of the tubular film body 25, parallel to the surface that constitutes the ingredient cross-section portion 4. In other words, this folding mode is a gusset folding that folds to form a gusset portion.

[0049] Here, this gusset folding may be performed by, for example, pressing a flat plate or the like with an appropriate force from above and below against the approximate center of first film surface portion 56 and second film surface portion 57 of tubular film body 25, which are the folding portions, to push packaging film 1 toward the inside of tubular film body 25. By using such an embodiment, it is possible to realize automation of gusset folding using an automatic device.

[0050] Also, this gusset folding may be performed in such a manner that pressing is performed by the flat plate or the like while the sandwich 2 is being transported in the middle of being packaged.

[0051] Furthermore, the folding style of the packaging film 1 in step S5 is not limited to gusset folding, and may be other styles as long as the packaging film 1 can be in close contact with the sandwich back side 8 of the sandwich 2, such as the folding of the packaging film 1 described below.

[0052] Then, by performing a gusset folding in step S5, excess packaging film 28 is formed at the tip of sandwich bottom portion 23 (FIG. 6). Then, boundary portion 43 between excess packaging film 28 and sandwich 2 is sealed by welding along the edge of sandwich 2, thereby completing the sealing of sandwich back portion 22 with packaging film 1 (step S6). The method for welding boundary portion 43 is, for example, thermal welding. Also, the formed excess packaging film 28 can be marked with, for example, the mark of the manufacturer selling sandwich 2 or the name of sandwich 2 to be packaged.

[0053] In this manner, since the excess packaging film portion 28 is heat-sealed, the sandwich back portion 22 of the sandwich 2 is adequately sealed. This makes it possible to adequately reduce the risk of foreign matter being mixed into the sandwich back side 8 of the sandwich 2.

[0054] Next, the sandwich 2 placed with the triangular first surface portion 3 at the bottom is rotated about 90 degrees together with the tubular film body 25, with the longitudinal direction of the tubular film body 25 as the axis of rotation so that the ingredient cross-section portion 4 of the sandwich 2 is at the bottom (step S7). After this rotation, the ingredient cross-section portion 4 is on the bottom surface, the top end portion 24 is at the apex, and the sandwich 2 is in a well-balanced upright state with the ingredient cross-section portion 4 at the bottom. This step S7 is provided for the purpose of facilitating the subsequent work process, and this step S7 may be omitted.

[0055] Next, the first film surface portion 56 that will come into contact with the sandwich bottom side 9 of the sandwich 2 is folded to make it adhere closely to the sandwich bottom portion 23. As an example of the mechanism for folding the packaging film 1 on the sandwich bottom side 9, first, a strong object such as a plate is slid downward from the top end portion 24 of the sandwich 2 along the sandwich bottom portion 23 of the sandwich 2 to press the packaging film 1 and bring the packaging film 1 into close contact with the entire sandwich bottom portion 23 of the sandwich 2 (FIG. 7). At this time, the strong structure is not brought into contact with the two edge portions 35 of the sandwich bottom portion 23 of the sandwich 2 and the triangular first surface portion 3 and the triangular second surface portion 6. In other words, the width of the strong object such as a plate is set to be slightly shorter than the length and width of the top end portion 24 of the sandwich 2. The folding step S7, like the gusset folding described above, may also be automated using automatic equipment by moving a sturdy object such as a plate or by moving sandwich 2 along a sturdy object such as a plate.

[0056] Then, after step S7, in the sandwich bottom portion 23 of the sandwich 2, only the packaging film near its two end edge portions 35 is not adhered to the sandwich bottom portion 23, but stands upright while being separated from the sandwich bottom portion 23 as an upright portion in a protruding state (hereinafter referred to as the packaging film upright portion 10).

[0057] Next, the two upright portions 10 of the packaging film are folded toward the sandwich bottom portion 23 of the sandwich 2. At this time, the two end portions 35 are used as starting points and folded toward the sandwich bottom portion 23 at approximately 90 degrees.

[0058] Then, as in the case of the sandwich bottom portion 23, when the packaging film upright portion 10 is folded, a packaging film excess portion 28 is formed at the rear end. A boundary portion 43 between this packaging film excess portion 28 and the sandwich 2 is also welded along the edge of the sandwich 2 as described above (FIG. 8, step S9). The welding mechanism is, for example, thermal welding. Therefore, even on the sandwich bottom side 9, the packaging film 1 sufficiently seals the sandwich 2.

[0059] The manner in which sandwich bottom portion 23 is folded in steps S8 and S9 may be the above-mentioned gusset-folding method.

[0060] Then, in step S9 described above, sandwich 2 is completely sealed in packaging film 1. At this point, sandwich 2 is wrapped by heat welding at boundary 43 with two excess packaging film portions 28, and the other portions are wrapped by packaging film 1. Therefore, sufficient sealing performance is achieved, and the possibility of foreign matter entering packaging film 1 is greatly reduced.

[0061] Then, excess packaging film portion 28 formed in step S9 is folded toward sandwich bottom portion 23 of sandwich 2, so that the entire excess packaging film portion 28 is aligned along sandwich bottom portion 23 of sandwich 2 (FIG. 9). After excess packaging film portion 28 is folded, excess packaging film portion 28 is fixed while being aligned along sandwich bottom portion 23 by a fastening material such as adhesive tape 34. Through this process, packaging of sandwich 2 is completed (step S10).

[0062] After going through the above steps, when the packaging of sandwich 2 is completed, opening tape 29 is provided along approximately the center line of sandwich back portion 22 and sandwich bottom portion 23 after packaging (FIG. 9). Therefore, a user can open sandwich back portion 22 and sandwich bottom portion 23 along opening tape 29, and can easily remove sandwich 2 from inside packaging film 1.

[0063] The sandwich package packaged through the above steps has a configuration as shown in FIG. 9 or 10, and includes a bag 59, a joint portion 7 provided across the sandwich back portion 22, the triangular second surface portion 6, and the sandwich bottom portion 23, two portions, a front seal portion 12 and a rear seal portion 11 formed by thermally welding the front and rear ends of the sandwich 2 to the packaging film 1, two excess portions 28 of the packaging film formed near the front and rear ends of the sandwich, and a joint portion 7 provided across the sandwich back portion 22. the sandwich 2 is folded inward at the sandwich bottom portion 23, a fold-in portion formed inward at the sandwich bottom portion 23, an opening tape 17 serving as an opening trigger portion formed on the sandwich back portion 22 at a height equal to or more than half the height of the sandwich when the sandwich 2 is stood upright with the sandwich bottom portion 23 at the bottom, and an opening tape 29 serving as opening means provided across the sandwich bottom portion 23 and the sandwich back portion 22.

[0064] Furthermore, after sandwich 2 is packaged, printing space 42 is located on sandwich back portion 22. Therefore, by displaying packaged sandwich 2 on a shelf with sandwich bottom portion 23 on the bottom, ingredient cross-section portion 4 on the front side, and sandwich back portion 22 on the back side, there is no risk of the printing space becoming dirty.

[0065] In addition, in the packaged sandwich 2, the joint 7 is provided over a part of the sandwich back surface 22, the triangular second surface 6, and a part of the sandwich bottom surface 23 (FIGS. 9 to 11). Therefore, it is possible to provide an opening surface by the tear tape 29 over two surfaces, the sandwich back surface 22 and the sandwich bottom surface 23.

[0066] [2. Effects of the sandwich packaging method according to one embodiment of the present invention] Next, the effects of the sandwich packaging method according to one embodiment of the present invention will be described.

[0067] According to the sandwich packaging method of the present invention, it is possible to seal at three locations: rear seal portion 11, front seal portion 12, and joint portion 7. Therefore, it is possible to ensure sufficient sealing of sandwich 2 compared to conventional packaging methods for sandwich 2, and to sufficiently prevent foreign objects such as insects from entering the inside of sandwich 2.

[0068] Furthermore, according to the method for packaging sandwich 2 according to one embodiment of the present invention, sandwich 2 is covered with packaging film 1 for packaging, so that the gap between sandwich 2 and packaging film 1 can be minimized. Therefore, sandwich 2 is less likely to shake within packaging film 1 during transportation, and the risk of ingredients adhering to packaging film 1 or ingredient cross section 4, making it difficult to see the contents, can be reduced. Therefore, the risk of a decrease in commercial value can be reduced.

[0069] In addition, according to a method for packaging a sandwich according to an embodiment of the present invention, the opening is The packaging film 1 is disposed on the front and rear sides of the sandwich 2, and thus has a sufficient opening space, making it easy to remove the sandwich 2 from inside the packaging film 1, and is therefore highly convenient.

[0070] Furthermore, according to the method for packaging sandwiches 2 according to one embodiment of the present invention, when packaging sandwiches 2 using an automatic device, it is possible to move sandwiches 2 and packaging bags made of packaging film 1 at the same speed. In other words, sandwiches 2 can be transported while being packaged, and the processing speed of the packaging process can be increased.

[0071] Furthermore, according to the packaging method of the sandwich 2 according to one embodiment of the present invention, the tear tape 29 and the shape of the notch are distinctive, making it easy to open. In this respect, this embodiment is excellent in terms of convenience.

[0072] Furthermore, in the packaging means for sandwich 2 according to one embodiment of the present invention, in a process prior to packaging sandwich 2, ingredient covering material 5 may be provided on ingredient cross-section portion 4 of sandwich 2 in order to maintain the appearance of the product. Here, the ingredient covering material 5 may be made of the same kind of material as packaging film 1, for example, a plastic film such as nylon. When covering with ingredient covering material 5, the covering may be done manually by a human being, or the covering may be automated using a machine.

[0073] As an example of the covering mode with the ingredient covering material 5 described above, the ingredient cross-section portion 4 of the sandwich 2 may be covered with the ingredient covering material 5 in advance, and then the sandwich 2 may be wrapped with the wrapping film 1 .

[0074] Furthermore, when the packaging means for the sandwich 2 in one embodiment of the present invention is automated, for example using an automatic driving machine, it is also possible to print on the rolled film in advance and then cut it to the size for one sandwich before use.

[0075] Furthermore, when the sandwich packaging means according to one embodiment of the present invention is automated, the packaging film 1 may be folded in advance to form a tubular film body 25, and then the sandwich 2 may be embedded in the tubular film body 25. Even in this case, the sandwich 2 can be packed tightly because a perfect triangular prism-shaped packaging body is not formed in advance.

[0076] In the embodiment described above, the preparation of sandwiches 2 and the molding of tubular film body 25 from packaging film 1 can be carried out simultaneously in parallel, which is expected to reduce the time required on the production line.

[0077] In addition, in the packaging means for sandwich 2 according to one embodiment of the present invention, as described above, ingredients and the like can be printed in advance in printing space 42 of packaging film 1. This eliminates the need to attach a separate label, saving time and effort, and is an embodiment that is highly convenient and environmentally friendly, leading to a reduction in the waste of resources.

[0078] Furthermore, the shape of the label as the opening handle of the packaging means of the sandwich 2 according to one embodiment of the present invention may be in various forms. Specifically, for example, it may be an arc shape or an angular shape.

[0079] Furthermore, the shape of the cut edge of the opening handle portion 50 of the packaging film 1 used in the packaging means for the sandwich according to one embodiment of the present invention may be various, as long as it is a shape that can trigger the vertical splitting of the packaging film 1. Specifically, a semicircular cut edge, a triangular cut edge, a rectangular cut edge, or the like is flexible.

[0080] Furthermore, with regard to the height position of opening handle 50 used in the sandwich packaging means according to one embodiment of the present invention, when sandwich 2 is placed with sandwich bottom portion 23 facing down, opening handle 50 is provided at a position that is at least half the height width of sandwich 2. In this manner, when packaging film 1 is opened, sandwich back portion 22 and sandwich bottom portion 23 can be opened over a wide range.

[0081] In addition, the sandwich opening mode of the sandwich packaging method according to one embodiment of the present invention may be other modes. Specifically, the width of the opening tape may be approximately 80% or more of the width of the sandwich back portion (length of top end 24), allowing opening over a wide range. In such a mode, the opening means of sandwich 2 allows opening over a wide range of sandwich bottom portion 23 and sandwich back portion 22, providing excellent convenience for users.

[0082] Furthermore, in the method for packaging sandwiches according to one embodiment of the present invention, the packaging film may be a packaging film previously formed into a rectangular shape, or a length corresponding to the amount of one sandwich to be packaged may be pulled out from an aggregate of roll films, for example a film roll of packaging film, and a tubular film body 25 may be previously formed according to the size of the sandwich, after which the sandwich is inserted and sealed in. In this case, the packaging film may be cut before the tubular film body 25 is formed and the sandwich is sealed in, or after the tubular film body 25 is formed and the sandwich is sealed in.

[0083] After the sandwich is sealed, one end of the tubular film body 25 is cut, and then the second step is carried out.

[0084] In this manner, the time required for packaging the sandwiches can be reduced, and a large number of sandwiches 2 can be packaged in a short period of time.

[0085] The above-mentioned contents are not limited to the present embodiment. It goes without saying that any other inventions that are considered to be of the same nature, such as minor modifications, are within the same technical scope as the present invention. [Explanation of symbols]

[0086] 1 Packaging film 2. Sandwiches 3 Triangular shaped surface first surface part (side surface) 4. Cross-section of ingredients (first side) 5. Ingredients covering material 6 Triangular surface second surface (side surface) 7 Joint 8 Sandwich back side 9 Bottom side of sandwich 10 Packaging film upright part 11 Rear seal 12 Front seal 17 Tear Tape 22 Back of sandwich (second side) 23 Sandwich bottom (third side) 24 Apex 25 Cylindrical film body 28 Excess packaging film (gripping part) 29 Opening Tape 32 Rear space 33 Bottom side space 34 Adhesive Tape 35 Edge 40 Upper edge of packaging film 41 Bottom edge of packaging film 42 Printing space 50 Opening handle 51 Opening cut 55 Hypotenuse 56 First film surface 57 Second film surface 58 Third film surface 59 bags

Claims

1. The packaging film covers both sides of the right-angled triangle, the cross-section of the ingredients along the hypotenuse of the sides, and the front A sandwich back portion along one of the two sides that form a right angle on the side, and and a sandwich having a sandwich bottom along the other of the two sides.

1. A method of packaging sandwiches for packaging, comprising the steps of: A joint is formed by joining two opposing edges of the rectangular packaging film. The first film surface portion where the joint portion is located and the second film surface portion facing the first film surface portion are The film surface portion and a pair of third film surface portions facing each other form a rectangular tubular shape with openings at both ends. The joint portion inside the cylindrical film body is aligned along the cylindrical film body. The sandwich is placed in the middle of the longitudinal direction, and one of the side surfaces is placed on the first film surface portion. and the ingredient cross-section portion is positioned along one of the third film surfaces. The first step to a second step of folding inward an excess portion of the tubular film body on a side of the sandwich back surface in the longitudinal direction with respect to the sandwich to form a gripping portion and seal the excess portion; The longitudinal direction of the sandwich in the tubular film body and a third step of folding inward and sealing the excess portion on the bottom surface side of the chuck, A substantially linear tear tape having an opening assist function that allows the sandwich to be opened along the tear tape is disposed near the center line in the longitudinal direction of each of the back surface of the sandwich and the bottom surface of the sandwich; In addition, the joint portion is provided so as to be bent and formed along the sandwich over the back surface of the sandwich, the second triangular surface of the right-angled triangle shape, and the back surface of the sandwich when the sandwich is packaged in the packaging film. A method for packaging sandwiches comprising the steps of:

2. A method for packaging a sandwich, the method comprising the steps of: packaging a sandwich having two right-angled triangular sides, an ingredient cross-section along the hypotenuse of the side, a sandwich back along one of two sides that form a right angle on the side, and a sandwich bottom along the other of the two sides, the method comprising the steps of: A tubular film body corresponding to the size of the sandwich is formed in advance by forming a joint by joining two opposing edge portions of the packaging film pulled from an assembly of sheet-like packaging films, and the sandwich is positioned in a longitudinal middle portion of the tubular film body along the joint, the tubular film body having a rectangular tubular shape with both ends open or one end open, the tubular film body being formed by a first film surface portion where the joint is located, a second film surface portion opposed to the first film surface portion, and a pair of third film surface portions opposed to each other, with one of the side surfaces aligned along the first film surface portion and the ingredient cross-section portion aligned along one of the third film surface portions; The first step is to cut the packaging film along a plane perpendicular to the first film surface portion, the second film surface portion, and the third film surface portion before the second step is started. A first step characterized by a second step of folding inward an excess portion of the tubular film body on a side of the sandwich back surface in the longitudinal direction with respect to the sandwich to form a gripping portion and seal the excess portion; and a third step of folding inward and sealing an excess portion of the tubular film body on a bottom surface side of the sandwich in the longitudinal direction with respect to the sandwich, A substantially linear tear tape having an opening assist function that allows the sandwich to be opened along the tear tape is disposed near the center line in the longitudinal direction of each of the back surface of the sandwich and the bottom surface of the sandwich; The joint is formed so as to be bent along the sandwich from the back surface of the sandwich to the second triangular surface of the right-angled triangle and the back surface of the sandwich when the sandwich is wrapped in the wrapping film. A method for packaging sandwiches comprising the steps of:

3. At least one of the second step and the third step is The first film surface portion and the second film surface portion of the packaging film covering the sandwich, 3. A method for packaging sandwiches as described in claim 1 or claim 2, characterized in that it includes a step of folding the tubular film body toward the inside of the tubular film body, using a center line formed along the longitudinal direction of the tubular film body as a tip, and abutting the tubular film body against the bottom portion of the sandwich or the back portion of the sandwich.

4. At least one of the second step and the third step is A solid object is pressed against the back or bottom surface of the sandwich, or the sandwich is By moving a rigid object along the back surface of the sandwich or the bottom surface of the sandwich, the package Only both ends of the packaging film are made to stand upright to form upright portions, and the upright portions are then placed in the sandwich. The sandwich is folded along the back or bottom of the sandwich, and the sandwich is wrapped in the wrapping film. The method is characterized in that the method is performed by a step of sealing the witch. A method for packaging a sandwich according to claim 1 or claim 2.

5. A transparent, heat-sealable plastic film that can be printed with text or patterns or can be plain. or a heat-sealable packaging film made of a paper substrate and a thermoplastic synthetic resin layer. A package in which a sandwich is placed in a bag and closed by heat sealing, The ends of a sheet of packaging film are folded together to form a rectangular cylindrical film body, The joint portion, which is the overlapping portion of the joint, is sandwiched between the back surface of the sandwich, the second triangular surface, and the The sandwich bottom and the front end of the sandwich are extended to fit along the sandwich. A joint formed by bending as shown in FIG. a front end of the sandwich formed at the front and rear of the bag when the bag is bent; and at the rear end of the sandwich, A seal portion formed by heat welding along the The sandwich front end and the sandwich rear end of the bag are provided with packaging flaps. Film surplus and A fold formed at the sandwich rear portion of the bag inwardly and upwardly toward the inside of the bag. The inlet and A fold formed in the sandwich bottom portion of the bag toward the inside of the bag. Department and The sandwich is placed upright with the bottom surface of the sandwich at the bottom. In this embodiment, the sandwich is formed at a height of at least half the height of the sandwich on the rear side of the sandwich. An opening trigger part, The opening trigger portion is a base portion, and the opening trigger portion is a bottom surface portion of the sandwich and and a substantially linear opening tape provided along the vicinity of the longitudinal center line of each of the sandwich back portions, the opening tape being capable of opening the bag by being detached from the bag; A sandwich package comprising:

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