Sandwich packaging bag roll, sandwich packaging bag making device, and sandwich packaging method

Abstract

To easily accommodate a sandwich in a bag, reduce the amount of plastic used, and prevent paper waste and paper powder from being generated in a place where the sandwich is packed. [Solution] A sandwich packaging roll 1 is pulled out from each of a pair of rolls 34 on which the sandwich packaging roll 1 is wound, the paper sheet portion 2 having an approximately isosceles trapezoidal food storage portion 4 and the non-paper sheet portion 3 made of a plastic sheet are continuously connected alternately, the food storage portions 4 of the sandwich packaging rolls 1 are overlapped, and a bag is formed by forming connections along the short sides 5 and side sides 6 of the isosceles trapezoid, a right-angled triangular sandwich x is placed into the bag through an opening on the long side 7 of the isosceles trapezoid, the non-paper sheet portion 3 is cut to separate the bag containing the sandwich x from the sandwich packaging roll 1, and the paper sheet and plastic sheet remaining on the opening side are folded and the top is sealed.

Description

[Technical field]

[0001] The present invention relates to a food packaging bag for packaging sandwiches in the shape of a right angle triangle. [Background technology]

[0002] Sandwiches in the shape of a right triangle are stored in packaging bags made of plastic film and displayed in stores. Patent Document 1 and the like disclose packaging bags for storing such right-angled triangular sandwiches.

[0003] The food packaging bag in Patent Document 1 is a bag body sealed on three sides by a top sealing part formed by bonding a pair of plastic film sheets together along a line crossing both sides while leaving a predetermined range of the tip of each sheet as a tab, and a side sealing part formed by bonding both sides of each sheet rearward of the top sealing part. The pair of sheets are formed into a trapezoid or trapezoid-like shape with both sides narrowing toward the tip, and after the three sides are sealed to form a bag body, this bag body is expanded three-dimensionally (paragraph 0024 of the same document).

[0004] In addition, the cited reference 2 describes cutting a paper sheet into a rectangular shape, connecting it to a long plastic sheet, and cutting or fusing it to make a triangular food packaging bag for food, which gives the bag a more solid and luxurious feel (ibid. 0019).

[0005] Furthermore, cited document 3 describes a sealing device that folds and fixes the cylindrical opening of a bag containing a triangular prism-shaped article such as a sandwich from all four sides. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2020-70084 A [Patent Document 2] JP 2005-35673 A [Patent Document 3] JP 2002-205701 A Summary of the Invention [Problem to be solved by the invention]

[0007] The food packaging bag made from the plastic film sheet described in Patent Document 1 has a trapezoidal bag body in which a right-angled triangular sandwich is placed and packaged. The sandwich can be neatly packaged with almost no gaps, following the shape of the right-angled triangle. In addition, since an opening aid such as cutting tape is provided, it can be easily opened, and the sandwich inside can be removed from the opening. Furthermore, since it is made of a transparent plastic sheet, the sandwich inside can be easily observed.

[0008] However, plastic containers must be disposed of separately from combustible waste after use. In addition, plastic that is not collected flows into the environment and is one of the causes of marine pollution, and its adverse effects on the ecosystem are also becoming a problem.

[0009] The food packaging bag described in Patent Document 2 uses a paper sheet in addition to a plastic sheet. However, Patent Document 2 aims to increase the sense of weight and luxury. As shown in 0030 of the same document, cutting a paper sheet strip to a predetermined length and overlapping the cut paper sheet on a plastic sheet does not reduce the amount of plastic used, and waste increases by the amount of the paper sheet. In 0034 and subsequent documents, it is described that a plastic sheet strip and a paper sheet strip are each unwound from a roll, cut to a predetermined length by a cutter, and the ends of the cut plastic sheet and the ends of the cut rectangular paper sheet are overlapped and sealed with a heat seal bar, thereby alternately joining the rectangular plastic sheet and the rectangular paper sheet to form a front sheet strip. However, such a process of alternately joining rectangular plastic sheets and rectangular paper sheets is not actually possible, and even if it were to be carried out, it would require extremely complicated and large-scale equipment and processes.

[0010] In the sealing device as disclosed in Patent Document 3, the open cylindrical opening of the sandwich bag that is protruding from the sandwich and is sealed can be automatically folded from all four sides. However, when using conventional sandwich packaging bags as disclosed in Patent Documents 1 and 2, the manufacturer of the packaging bag must first create the bag body, pack and transport it, and supply it to the sandwich packaging company, who must then open it and bring the sandwich packaging bag to the sandwich packaging process. This is time-consuming and laborious, and increases costs.

[0011] Furthermore, in order to put a sandwich into the sandwich packaging bag that has been made into a flattened bag, the opening of the closed bag must be opened. This is a time-consuming task. Paragraph 0061 of Patent Document 3 describes that in order to supply the articles (sandwiches) contained in the bags to a receiver at the article supply position, the articles are stored manually, the bags stacked on a supply table are opened by an air blowing means or a suction means, and the articles are pushed into the opened bag manually or by a pusher. However, manual work requires a worker. Also, a device for opening the bag by an air blowing means or a suction means is large and expensive, and there is a possibility that the bag will fail to open.

[0012] To provide a sandwich packaging bag stock, a sandwich packaging bag making device, and a sandwich packaging method that can easily accommodate a sandwich in a bag body, reduce the amount of plastic used, and do not generate paper waste or paper powder in the area where the sandwich is packaged. [Means for solving the problem]

[0013] In order to solve the above problems, the sandwich packaging base material of the present invention is a sandwich packaging base material in which a paper sheet portion having a substantially isosceles trapezoidal food storage portion and a non-paper sheet portion are alternately and continuously connected. A rectangular ear portion having the same width as the short side of the substantially isosceles trapezoidal food storage portion is formed next to the short side, and the non-paper sheet portion is a rectangular plastic sheet having the same width as the short side of the substantially isosceles trapezoid, and it is preferable that one end of the ear portion is connected to one end of the non-paper sheet portion.

[0014] The first sandwich packaging original may be a sandwich packaging original having a cutout provided inside a rectangle having a short side of the isosceles trapezoid that is the food storage section of the paper sheet part, and a window formed in the cutout by a transparent sheet attached to the back side of the first paper sheet. The second sandwich packaging original may be a sandwich packaging original as described in claim 2, having a horizontal cutting line parallel to the short side of the isosceles trapezoid and a vertical cutting line formed perpendicular to the horizontal cutting line from both ends of the horizontal cutting line inside a rectangle having a short side of the isosceles trapezoid that is the food storage section of the paper sheet part, and an opening sheet provided on the horizontal cutting line and the vertical cutting line. The first and second sandwich packaging originals may be provided as a pair.

[0015] The sandwich packaging bag making apparatus of the present invention comprises two roll holding members for holding a sandwich packaging roll in which a paper sheet portion having a food storage portion of an approximately isosceles trapezoid shape and a non-paper sheet portion made of a plastic sheet are continuously connected in an alternating manner, a connection forming member for forming a connection portion along the short sides and side sides of the isosceles trapezoid shape when the food storage portions of the paper sheet portions of the sandwich packaging roll pulled out from each of the two roll holding members overlap, and a cutting member for cutting the non-sheet portions.

[0016] Furthermore, the sandwich packaging method of the present invention involves pulling out sandwich packaging rolls from each of a pair of rolls of sandwich packaging rolls, which are wound with sandwich packaging rolls in which a paper sheet portion having an approximately isosceles trapezoidal food storage portion and a non-paper sheet portion made of a plastic sheet are alternately and continuously connected, overlapping the food storage portions of each sandwich packaging roll, forming connections along the short sides and side edges of the isosceles trapezoid to form a bag, placing the right-angled triangular sandwich into the bag through the opening on the long side of the isosceles trapezoid, cutting the non-paper sheet portion to separate the bag containing the sandwich from the sandwich packaging roll, folding the paper sheet and plastic sheet remaining on the opening side and sealing the top. A first sandwich packaging original roll has a cutout portion provided inside a rectangle whose side is the short side of the isosceles trapezoid that is the food storage portion of the paper sheet part, and a window portion formed by a transparent sheet attached to the back side of the first paper sheet (the surface that contacts the sandwich when the sandwich is stored in the first sandwich packaging original roll) at the cutout portion; and a second sandwich packaging original roll has a horizontal cutting line parallel to the short side of the isosceles trapezoid and a vertical cutting line formed perpendicular to the horizontal cutting line from both ends of the horizontal cutting line inside the rectangle whose side is the short side of the isosceles trapezoid that is the food storage portion of the paper sheet part, and has opening sheets provided on the horizontal cutting line and the vertical cutting line.The food storage portions of these second sandwich packaging original rolls are overlapped with each other and connection portions are formed along the short side and side sides of the isosceles trapezoid to form a bag, and the sandwich is placed inside the bag so that the surface along the hypotenuse of the right-angled triangle sandwich is aligned with the window portion of the first sandwich packaging original roll. Effect of the Invention

[0017] The sandwich packaging bags made from the sandwich packaging roll of this invention use paper for the paper sheet portion that makes up the majority of the bag, and are made primarily from paper, which is incinerable and easily decomposes in the environment, with less plastic used and less adverse impact on the environment. Since the roll of raw material is supplied to the sandwich packer, it can be provided more cheaply than if the bag was supplied after it was made. It is easy to put sandwiches into the bag, making it easy to automate packaging. Since the paper sheet is not cut at the food packaging site, no paper waste or paper powder is generated, making it clean. [Brief description of the drawings]

[0018] [Figure 1] FIG. 2 is a front view showing a sandwich packaging roll. [Diagram 2] FIG. 4 is a right side view showing the vicinity of the non-paper sheet. [Diagram 3] FIG. 2 is a front view showing the paper sheet portion of the sandwich packaging roll of the first example. [Figure 4] FIG. 4 is a front view showing the paper sheet portion of a sandwich packaging roll according to a second example. [Diagram 5]FIG. [Figure 6] FIG. 11 is a front view showing the paper sheet portion of a sandwich packaging roll according to a third example. [Figure 7] FIG. [Figure 8] FIG. 11 is a front view showing the paper sheet portion of a sandwich packaging roll according to a fourth example. [Figure 9] FIG. [Figure 10] FIG. 2 is a front view showing a schematic diagram of a method for manufacturing a raw sheet for sandwich packaging. [Figure 11] FIG. 2 is a front view showing a schematic diagram of a sandwich packaging bag making apparatus. [Figure 12] FIG. [Figure 13] FIG. 11 is a right side view showing a schematic diagram of the start state of bag making. [Figure 14] FIG. 11 is a right side view illustrating the formation of a connection portion. [Figure 15] FIG. 13 is a right side view showing a schematic diagram of inserting a sandwich. [Figure 16] FIG. 13 is a right side view showing a schematic view of the sandwich inserted. [Figure 17] FIG. 13 is a right side view showing the state in which the bag containing the sandwich is lowered. [Figure 18] FIG. 11 is a right side view showing the separation of the bag containing the sandwich; [Figure 19] FIG. 2 is a perspective view showing a bag containing a sandwich. [Figure 20] FIG. 1 is a perspective view showing an example of a wrapped sandwich with a sealed mouth. [Figure 21] FIG. 2 is a perspective view of the bevel side of the sandwich. [Figure 22] FIG. 2 is a perspective view of the bottom side of the sandwich. [Diagram 23] FIG. 2 is a perspective view of the bevel side of the wrapped sandwich. [Figure 24] FIG. 13 is a perspective view showing how the wrapped sandwich is opened. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a sandwich packaging roll. The sandwich packaging roll 1 has a paper sheet portion 2 and a non-paper sheet portion 3, which are alternately connected in a continuous manner and are repeated at a constant cycle. FIG. 2 is an enlarged right side view of part A, showing the vicinity of the non-paper sheet. Although each sheet constituting the sandwich packaging roll is a thin sheet, in this cross-sectional view, the thickness is emphasized in order to make the structure easier to understand.

[0020] The paper sheet portion 2 is a portion that forms the main body of the sandwich packaging bag manufactured from this sandwich packaging roll, and is mainly made of a paper sheet. This paper sheet may be coated or laminated on one or both sides. Also, a transparent sheet for forming a window may be provided as in the paper sheet portion of the second example described below. In this example, coating or lamination for heat sealing is provided on one side.

[0021] The non-paper sheet portion is made of a material other than paper. At least the portion to be cut is made of a material that is unlikely to produce chips or powder when cut, and in this example, a plastic film such as polypropylene is used.

[0022] 3 is a front view showing the paper sheet part of the sandwich packaging roll of the first example. The paper sheet part 2 has a food storage part 4 of a substantially isosceles trapezoid shape. A rectangular ear part 8 having the same width as the short side 5 of the substantially isosceles trapezoid shape of the food storage part 4 is formed next to the short side 5. In addition, a folding part 9 is formed on the side of the long side 7 of the substantially isosceles trapezoid shape, which becomes a folding margin after the sandwich is stored. The folding part 9 of this example has an isosceles trapezoid shape that narrows in width as it goes away from the food storage part 4, and an ear-shaped shape that continues beyond that. This ear-shaped part is a rectangle with the same width as the ear part 9.

[0023] The non-paper sheet portion 3 is rectangular and is provided between the adjacent paper sheet portions 2. In this example, the width of the non-paper sheet portion 3 is the same as that of the ear-shaped portions of the ear portions 8 and the folded portion 9, and both ends of the non-paper sheet portion 3 are connected to the ear-shaped portions of the ear portions 8 and the folded portion 9 with joints of a predetermined length. In this example, a planned cutting line 10 is set in the middle of the length of the non-paper sheet portion 3.

[0024] FIG. 4 is a front view of the paper sheet part of the sandwich packaging roll of the second example, and FIG. 5 is a rear view of the same. The outer shape of the paper sheet part 2 is the same as that of the first example. In this example, a window part 11 is provided inside the food storage part 4. The window part is provided inside an area surrounded by a rectangular shape of the short side of the isosceles trapezoid shape of the food storage part 4, two perpendicular lines extending perpendicularly from this short side toward the long side 6, and a part of the long side 6. Within the rectangular area, a cutout part 12 is formed from the side close to the short side 6, and a transparent sheet 13 is attached to cover the cutout part 12. In this example, the cutout part 12 is a rectangle with rounded corners, but it may be a circle, a horizontally elongated ellipse, or the like.

[0025] FIG. 21 is a perspective view of the slanted side of the sandwich, and FIG. 22 is a perspective view of the bottom side. The sandwich x is made by stacking several rectangular slices of bread, sandwiching ingredients, and cutting them along the diagonal into a right-angled triangle shape. In this example, a non-square slice of bread is used, and the two perpendicular sides are different lengths, with the surface along the longer side being the vertical surface x2 and the surface along the shorter side being the bottom surface x3. When the sandwich is packaged, the window portion 11 is set to fit the slanted surface x1 of the sandwich. A transparent sheet 13 is attached to the surface of the paper sheet portion 2 that contacts the sandwich.

[0026] FIG. 6 is a front view of the paper sheet part of the sandwich packaging roll of the third example, and FIG. 7 is a rear view of the same. The outer shape of the paper sheet part 2 is the same as that of the first example. In this example, an opening aid part 14 is provided inside the food storage part 4. The opening aid part 14 is provided inside an area surrounded by a rectangular shape by the short side of the isosceles trapezoid of the food storage part 4, two perpendicular lines extending perpendicularly from the short side toward the long side 6, and a part of the long side 6. A horizontal dividing guide line 15 horizontally provided near the short side or near the long side of the isosceles trapezoid part, and a vertical dividing guide line 16 vertically provided from both ends of the horizontal dividing guide line 15 form a U-shaped dividing guide part 17, that is, a rectangular shape with one side missing. In this third example, the horizontal dividing guide line 15 is provided on the short side 5 side.

[0027] The horizontal dividing guiding line 15 and the vertical dividing guiding line 16 guide the paper sheet to be divided along the line, and may be completely divided along the line, or may be a partial cutting line or a perforation in which the divided and connected parts are alternately repeated. In this example, the horizontal dividing guiding line 15 and the vertical dividing guiding line 16 are formed by a perforation. In other words, the long side 7 side is an open U-shaped dividing guiding part, and no dividing guiding line is provided near the long side of the part surrounded by this, and it is connected to the other part of the paper sheet. This dividing guiding part 17 is preferably formed as large as possible, and is wide enough to take out the sandwich stored therein.

[0028] The opening sheet 18 has a cover portion 19 for covering the tearing guide portion 17 of the paper sheet, and a tab portion 20 provided underneath. The cover portion 19 is roughly rectangular and slightly wider than the tearing guide portion 17, i.e., large enough to form a connection portion outside the tearing guide portion 17.

[0029] The paper sheet 3 and the opening sheet 18 are connected by adhesive or the like. Alternatively, lamination or application of a heat-welding material may be performed near the connection of either the paper sheet or the opening sheet 18, and the connection may be made by heat sealing. An inner connection part 21 is provided in which the paper sheet and the opening sheet 18 are connected inside the separation induction part 17. In this example, it is formed by a thin part provided immediately inside the separation induction part 17 and a thin part provided so as to extend vertically from near the center of the horizontal separation induction line 15. Then, on the outside, a non-connection part 22 is provided along the separation induction part 17 where the paper sheet and the opening sheet 18 are not connected, and an outer connection part 23 is formed in which the paper sheet and the opening sheet 18 are connected outside the separation induction part 17. This outer connection part 23 is formed so as to surround the separation induction part 17, thereby closing the periphery of the separation induction part 17, so that air cannot enter or exit through the separation induction part 17. Additionally, the upper tab 20 of the tear sheet 18 is not connected to the paper sheet.

[0030] The sandwich packaging roll of the second example and the sandwich packaging roll of the third example are preferably used in pairs, and therefore the pair of the sandwich packaging roll of the second example and the sandwich packaging roll of the third example can be provided as a set of sandwich packaging rolls.

[0031] FIG. 8 is a front view showing the paper sheet part of the sandwich packaging roll of the fourth example, and FIG. 9 is a rear view of the same. As with the sandwich packaging roll of the third example, it has an opening assisting part 14, but is configured upside down. In this example, the horizontal dividing guide line 15 is provided on the long side 7 side. Also, the tab part 20 of the opening sheet 18 is provided on the side closer to the long side 7. When a sandwich is wrapped using the sandwich packaging roll of this example, the tab part appears on the upper side of the wrapped sandwich, and when opening, this tab part is pulled from top to bottom. The sandwich packaging roll of the fourth example can also be provided as a set of sandwich packaging rolls by pairing it with the sandwich packaging roll of the second example.

[0032] Fig. 10 is a front view showing a manufacturing method of a raw cloth for sandwich packaging. The raw cloth for sandwich packaging 30 is a strip-shaped raw cloth consisting of a continuous paper sheet of a certain width, and serves as the base material for the raw cloth for sandwich packaging. In this example, one side (the side in front in Fig. 8) is laminated or coated with a heat-sealing material so that it can be heat-sealed. The raw cloth for sandwich packaging 30 flows from bottom to top in Fig. 10.

[0033] In the cut-out portion forming process Q1, cut-out portions 31 are formed in the widthwise center of the paper sheet roll 30 at a predetermined cycle. This cycle corresponds to the length required to form one sandwich packaging bag. Here, the cut-out portions 31 are rectangular, and their width is wider than that of the non-paper sheet portion 3.

[0034] In the non-paper sheet attachment process Q2, a non-paper sheet 32 ​​is attached to cover the cut portion 31. Here, a sheet piece of plastic film is attached by heat sealing.

[0035] In the outer shape forming process Q3, the outer shape of the sandwich packaging roll is formed. One cycle of the sandwich packaging roll 1, i.e., the outer shape of one batch used in bag making, is cut out using a cutter, press, etc. The non-paper sheet 32 ​​is cut out at its narrowest width to form the non-paper sheet portion 3. The space between the non-paper sheet 32 ​​and the next non-paper sheet 32 ​​is cut out to the shape of the paper sheet portion 2. Here, the paper sheet portion 2 is cut out so that the long side 7 of the isosceles trapezoid portion 4 faces the downstream side, the upper side in Figure 8, and the short side 5 faces the upstream side. In this way, one unit is formed.

[0036] By repeating the above process while unwinding the paper sheet roll 30 for the repetition cycle, a sandwich packaging roll is formed and sent downstream. The sandwich packaging roll being formed is wound around a core 33 to become a roll 34. The long side 7 of the isosceles trapezoid portion 4 of the food storage section 4 of the paper sheet portion 2 for one cycle is wound before the short side 5.

[0037] The above has been described by taking the first example of the method for manufacturing the sandwich packaging roll as an example, but the sandwich packaging rolls of the second, third, and fourth examples are basically the same. Furthermore, in the case of the sandwich packaging roll of the second example, in addition to the above steps, a step of forming the window portion 11, that is, a step of forming the cutout portion 12 and a step of attaching the transparent sheet 13 are added, and in the case of the sandwich packaging roll of the third and fourth examples, a step of forming the separation guide portion 17 and attaching the tear sheet 18 are added.

[0038] The sandwich packaging method will be described. Fig. 11 is a front view showing a schematic diagram of the sandwich packaging bag making apparatus, and Fig. 12 is a right side view of the same. The sandwich packaging bag making apparatus 40 is provided with two original roll holding members 41a, 43b that hold sandwich packaging original rolls 1a, 1b, a joint forming member 42 that forms a joint in the paper sheet portion 2, and a cutting member 43 that cuts the non-sheet portion 3. Furthermore, downstream of the joint forming member 42, a downstream roller 45 is provided, and upstream of the joint forming member 42, an upstream roller 45 is provided.

[0039] The joint forming member 42 forms a joint along the short side 5 and side 6 of the isosceles trapezoid when the food storage sections 4 of the paper sheet parts 2 of the sandwich packaging rolls 1a, 1b pulled out from the two rolls are overlapped. In this example, it is a heat bar shaped to fit the short side 5 and side 6 of the isosceles trapezoid. This heat bar may be provided in a pair. Alternatively, one of the heat bars may be an unheated pressing member of the same shape, or may be a plate-shaped pressing member. These paired members are movable toward and away from each other.

[0040] The cutting member 43 may be a heating blade that melts the plastic film, or may be a traveling blade that cuts the sheet while traveling. The cutting member 43 can be retracted to a position where it does not come into contact with the sandwich packaging material or the joint forming member 41 when not cutting.

[0041] The downstream roller 44 is located in a position where it can come into contact with the vicinity of the leading ends of the two sandwich packaging rolls, and is located immediately upstream of the cutting device 43. Here, it is a pair of rollers that can come into contact with each other so as to sandwich the leading ends of the two sandwich packaging rolls. These two rollers are movable so as to approach and move away from each other.

[0042] An upstream roller 45 is provided for each of the two sandwich packaging webs 1. An upstream roller 45a is provided for one sandwich packaging web 1a, and an upstream roller 45b is provided for the other sandwich packaging web 1b, which pull out the sandwich packaging webs 1a and b from their respective web rolls 34a and b and feed them to a bag making position 46 where a joint forming member is located. These upstream rollers 45a and 45b are synchronized to feed the two sandwich packaging webs 1a and b at the same length.

[0043] Upstream of the bag making position 46, the two sandwich packaging rolls 1a,b form a path in which the distance between them increases toward the upstream side. Here, the upstream rollers 45a,45b are positioned apart from each other to form a path that widens upward, but a similar path may be formed by a guide member or the like. Then, upstream of the bag making position 46, a sandwich insertion space 47 is formed between the two sandwich packaging rolls 1a,b.

[0044] Next, the sandwich packaging method will be described. FIG. 13 is a right side view showing a schematic diagram of the start state of bag making. The rolls of raw cloth 34a and b are attached to the respective rolls of raw cloth holding members 41. For example, one roll of raw cloth 34b is the sandwich packaging raw cloth of the second example, and the other roll of raw cloth 34a is the sandwich packaging raw cloth of the third or fourth example. The sandwich packaging raw cloths 1a and b are pulled out from the respective rolls of raw cloth 34a and b, passed through the upstream rollers 45a and 45b, and further attached to the downstream roller 45 at their leading ends. The downstream roller 45 is closed, and the leading ends of the two overlapping sandwich packaging raw cloths 1a and b are sandwiched. At this time, the pair of members constituting the joint forming member 42 are separated from each other and are retreated to a position where they do not interfere with the sandwich packaging raw cloths 1a and b. The two sandwich packaging raw cloths 1a and b are overlapped with their outlines aligned. Here, the original roll 34 is wound from the long side 7 of the isosceles trapezoidal portion 4 of the paper sheet portion 2, so that the short side 5 is pulled out first. Therefore, as shown in FIG. 11, the short side 5 faces downward (facing downstream).

[0045] Fig. 14 is a right side view showing the formation of the joint. The two members of the joint forming member 42 approach each other and close so as to sandwich the overlapping paper sheet portions of the sandwich packaging rolls 1a,b. A joint is formed by heat sealing along the short side 5 and the side side 6 of the isosceles trapezoidal portion 4, and a three-sided bag is formed. The long side 7 of the isosceles trapezoidal portion 4 is not connected.

[0046] FIG. 15 is a right side view showing the sandwich insertion. After the heat sealing is completed, the two members of the joint forming member 42 move away from each other and return to the retreated position. The short side 5 and the side 6 of the isosceles trapezoidal portion 4 are connected to the short side 5 and the side 6, but the long side 7 of the isosceles trapezoidal portion 4 is an opening that is not connected. The long side 7 of the isosceles trapezoidal portion 4 and the subsequent folded portion 9 and the non-paper sheet portion 3 are connected to the sandwich packaging rolls 1a and b that are open from each other. Therefore, when the two members of the joint forming member 42 move away from each other, the opening on the long side 7 of the isosceles trapezoidal portion 4 naturally opens. In addition, a sandwich insertion space is formed at the top, and the sandwich x can be easily inserted into the bag formed from this sandwich insertion space. This may be done manually, but a device for automatically inserting sandwiches is already in use, so this may be used.

[0047] The sandwich x is inserted into the bag from the corner x4 where the slope x1 and the vertical x2 intersect, with the surface along the hypotenuse of the right triangle (slant x1) facing one sandwich packaging roll 1b and the surface along the longer perpendicular line (vertical surface x2) facing the other sandwich packaging roll 1a. For example, when the sandwich packaging roll of the second example (assumed to be placed on the right side in the figure) and the sandwich packaging roll of the third or fourth example (assumed to be placed on the left side in the figure) are used as a pair, the slope x1 faces the window portion 11 of the sandwich packaging roll of the second example, and the vertical surface x2 faces the opening assist portion of the sandwich packaging roll of the third or fourth example.

[0048] 16 is a right side view showing a schematic diagram of the state in which a sandwich x is put in. When a sandwich x is put in, the food storage section 4 of the bag deforms to follow the outer shape of the sandwich x.

[0049] When the sandwich x is placed in the bag, the downstream rollers 44 are opened and retracted to a position where they do not interfere with the bag containing the sandwich x. The upstream rollers 45 are rotated to feed the sandwich packaging rolls 1a, 1b by the length of one cycle. This causes the bag containing the sandwich to drop below the downstream rollers 44. Figure 17 is a right side view showing the bag containing the sandwich in the lowered state.

[0050] FIG. 18 is a right side view showing the separation of the bag containing the sandwich. When the downstream roller 44 is closed, the mouth of the bag containing the sandwich is held. At this time, the cutting line 10 of the non-sheet portion 3 on the upstream side of the bag containing the sandwich is located at the height of the cutting member 43 immediately downstream of the downstream roller 44. The cutting member 43, which was in the retreated position, moves along the cutting line 10 while contacting the non-sheet portion 3. In this way, the non-sheet portion 3 is cut along the cutting line 10, and the bag containing the sandwich is separated from the sandwich packaging roll 1. The upstream of the sandwich cutting line 10 becomes the new tip of the sandwich packaging rolls 1a, 1b, and the state returns to that shown in FIG. 13. By repeating this process, bags containing the sandwich are formed one after another. The cutting is performed above the sandwich, but since it is performed on the non-sheet portion 3 made of a plastic film or the like, no paper waste or paper powder is generated. Therefore, foreign matter does not adhere to the sandwich, and the work can be performed hygienically.

[0051] Although the sandwich packaging rolls 1a, 1b are arranged to flow from top to bottom as an example, they may be arranged to flow horizontally. In this case, a path is formed upstream of the bag making position along which the two sandwich packaging rolls 1a, 1b spread out, and a sandwich insertion space is formed between the two sandwich packaging rolls 1a, 1b.

[0052] FIG. 19 is a perspective view showing a bag containing a sandwich. The top is open, and the bottom surface x3 of the sandwich is exposed upward. The part close to the long side 7 of the food storage section 4, the folded part 9, and the non-paper sheet part 3 stand on the bottom surface x3 of the sandwich x like four walls. These four wall-like parts are folded, and a seal or adhesive tape 44 is applied on them to seal them. In this way, a sandwich package is formed by an automated operation. FIG. 20 is a perspective view showing an example of a packaged sandwich with a sealed opening. The majority of the members for packaging the sandwich are paper sheets, and the amount of plastic used can be significantly reduced. For those who package the sandwich, a raw sandwich packaging sheet can be provided instead of a pre-made sandwich packaging bag. This can reduce the cost required for packaging. The sandwich can be easily inserted, the sandwich can be packaged without failure using a simple device, and paper dust is not generated during the bag making and packaging process.

[0053] FIG. 23 is a perspective view of the inclined side of a wrapped sandwich. That is, this is an example of a wrapped sandwich when the sandwich wrapping roll of the second example and the sandwich wrapping roll of the third example are used as a pair. A window portion 11 is provided on the inclined surface x1, which is the cut surface of the sandwich, so that the portion with the ingredients can be clearly observed. This wrapped sandwich x is displayed in a store with the surface x1 along the oblique side facing forward. In this way, by showing the ingredients of the sandwich to consumers through the transparent sheet 13, it is possible to stimulate their desire to purchase. Also, by seeing the ingredients, consumers can accurately select the sandwich they want to eat.

[0054] Fig. 24 is a perspective view showing a method for opening the sandwich package, showing the vertical surface x2 side of the packaged sandwich. This sandwich package bag can be easily opened by pinching the tab 20 with your fingers and pulling the opening sheet 18 off the paper sheet. The paper sheet 3 and the opening sheet 18 are only weakly connected by adhesive or heat sealing, so they can be easily pulled apart, leaving a large opening. The sandwich x inside can be easily removed from this opening.

[0055] When the sandwich packaging roll of the fourth example is used instead of the sandwich packaging roll of the third example, the handle portion of the opening sheet 18 appears on the upper side, and when opening, the opening sheet 18 is peeled off by pulling it down from the top. [Explanation of symbols]

[0056] 1. Sandwich packaging rolls 2.Paper sheet section 3. Non-paper sheet section 4. Food storage section (isosceles trapezoidal section) 5. Short side 6. Hypotenuse 7. Long side 8. Ears 9. Folding section 10. Cutting line 11. Window section 12.Cutout section 13.Transparent Sheet 14. Opening assistance section 15.Horizontal cutting guide line 16. Vertically divided induction line 17. Divided Guidance Section 18. Opening sheet 19. Covering part 20. Knob 21.Inner connection part 22. Non-connected parts 23.Outside connection 30.Paper sheet roll 31.Notch 32. Non-paper sheets 33. Core material 34. Raw material roll 40.Sandwich packaging bag making equipment 41. Raw material holding member 42. Connection forming member 43.Cutting material 44.Downstream roller 45.Upstream roller 46. ​​Bag making position 47. Sandwich insertion space Q1. The process of forming the notch Q2. Non-paper sheet installation process Q3.Outline forming process x. Sandwich x1.Slope (cut surface) x2.Vertical surface x3.Bottom x4. Corner

Claims

1. A base material for sandwich packaging, comprising an ear portion, a roughly isosceles trapezoidal food storage portion, a paper sheet portion connected to a folding portion and the ear portion, and a non-paper sheet portion, which are alternately and continuously connected.

2. A rectangular ear portion having the same width as the short side is formed adjacent to the short side of the approximately isosceles trapezoidal shape of the food storage portion, The non-paper sheet portion is a rectangular plastic sheet having a width equal to the short side of the approximately isosceles trapezoidal shape, 2. The sandwich packaging material according to claim 1, wherein one end of the edge portion and one end of the non-paper sheet portion are connected.

3. The sandwich packaging base material according to claim 2, further comprising a cutout portion provided within a rectangle having a short side of the isosceles trapezoid which is the food storage portion of the paper sheet portion, and a window portion formed by a transparent sheet attached to the back surface of the first paper sheet in the cutout portion.

4. Within a rectangle having a short side of the isosceles trapezoid that is the food storage portion of the paper sheet portion, a horizontal cutting line is parallel to the short side of the isosceles trapezoid, and a vertical cutting line is formed perpendicular to the horizontal cutting line from both ends of the horizontal cutting line, 3. The sandwich packaging material according to claim 2, further comprising a tear-off sheet provided on the transverse and longitudinal cutting lines.

5. Two roll-holding members for holding a roll of sandwich packaging material in which an ear portion, a roughly isosceles trapezoidal food storage portion, a paper sheet portion connected to a folding portion and the ear portion, and a non-paper sheet portion made of a plastic sheet are alternately and continuously connected; a joint forming member for forming joints along the short sides and side sides of the isosceles trapezoid when the food storage portions of the paper sheet portions of the sandwich packaging rolls pulled out from the two roll holding members are overlapped; A sandwich packaging bag making device equipped with a cutting member for cutting the non-sheet portion.

6. A method of manufacturing a sandwich packaging roll comprising: drawing out a sandwich packaging roll from each of a pair of rolls on which the sandwich packaging roll is wound, the roll being made of a paper sheet portion connected to a folding portion and a pair of ears, and a non-paper sheet portion made of a plastic sheet, the non-paper sheet portion being connected in an alternating manner; The food container portions of each sandwich packaging roll are overlapped, forming a connection portion along the short side and the side of the isosceles trapezoid to form a bag body; Place the right-angled triangular sandwich into the bag through the opening on the long side of the isosceles trapezoid. The non-paper sheet portion is cut to separate the bag containing the sandwich from the sandwich packaging roll; This sandwich packaging method involves folding the remaining paper and plastic sheets on the opening side and sealing the top.

7. a first sandwich packaging base roll, the first sandwich packaging base roll having a cutout portion provided inside a rectangular shape having a short side as one side of an isosceles trapezoidal food storage portion of the paper sheet portion, and a window portion formed in the cutout portion by a transparent sheet attached to the back surface of the first paper sheet; a second sandwich packaging roll having a food storage portion of the paper sheet portion, which is a rectangle having a short side of the isosceles trapezoid as one side, a horizontal cutting line parallel to the short side of the isosceles trapezoid and a vertical cutting line perpendicular to the horizontal cutting line from both ends of the horizontal cutting line, and an opening sheet provided on the horizontal cutting line and the vertical cutting line, is overlapped with the food storage portion of the second sandwich packaging roll, and a connection portion is formed along the short side and side of the isosceles trapezoid to form a bag body; 7. A method for sandwich packaging according to claim 6, wherein the sandwich is placed inside the bag so that a surface along the hypotenuse of the right-angled triangle sandwich is aligned with the window portion of the first sandwich packaging sheet.

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