JP2022173795A - food packaging bag - Google Patents

Abstract

To provide a food packaging bag capable of closing and sealing an opening part by neatly folding an opening part-side excess sheet piece after food is contained in a bag body when packaged.SOLUTION: A food packaging bag 1 comprises a bag body 10: which has one pair of sheets 2, 3 in a shape wider on the other side in a first direction than on one side which are put one over the other; and which also has three sides sealed with a top joint part 11 of the one end side and side joint parts 12, 12 of both end side parts to have an opening part 13 on the other end side. The food packaging bag packages food 6 in a three-dimensional shape both side faces of which are triangular and have a predetermined width. The food packaging bag 1 comprises a reinforcement sheet 5 which has side edges 5b, 5b which are added to a region sandwiched between two valley-folding lines L3, L3 corresponding to both side edges 60b, 60b of a bottom face 60 of the food 6 in a regions as an excess sheet piece of the pair of sheets 2, 3 on the side of the opening part 13 with the food 6 contained in the bag body 10, and are aligned with the respective valley-folding lines L3.SELECTED DRAWING: Figure 9

Description

The present invention relates to a food packaging bag for packaging food.

There are foods such as sandwiches finished in a three-dimensional shape (a triangular prism lying down) having triangular side surfaces (mainly a right-angled triangle shape) and a predetermined width. A general food packaging bag for packaging food is shown in FIG. 24, and a new one is known as described in Patent Document 1.

The food packaging bag 1' includes a bag body 10' and a header portion 15'. The bag body 10' is formed by superimposing a pair of sheets 2' and 3' having a shape in which the other end side is wider than the one end side. , 12' and the other end serves as an opening 13'. The header portion 15' is formed by joining the protruding pieces of the sheets 2' and 3' protruding from the top joint portion 11' to each other at appropriate points to be integrated.

The second sheet 3' in the header portion 15' is formed with, for example, an inverted U-shaped cut line 32' and an opening piece 33' having the cut line 32' as an outline. An unsealing strip 34' such as a cut tape is joined to the inner surface of the second sheet 3' from the unsealing piece 33' to the other end side of the second sheet 3'.

Food packaging methods are described in Patent Document 2 and Patent Document 3, for example. The outline is as follows. First, as shown in FIG. 25(a), air of a predetermined pressure is blown into the bag body 10' from the opening 13' by a blower (not shown), or the first sheet 2 is blown by a suction head (not shown). The opening 13' is opened by, for example, sucking and lifting the opening 13' side of '. In this state, the food 6' is accommodated in the bag body 10' from the apex side.

When the food 6' is accommodated in the bag body 10', the shape of the opening 13' becomes rectangular as shown in FIG. A pair of opposing triangular side portions are formed between the side joint portions 12' of the first sheet 2' and the second sheet 3'. The middle part of the first sheet 2' forms a rectangular front part. The middle part of the second sheet 3' forms a rectangular back part.

After the food 6' is accommodated in the bag body 10', as shown in FIG. Of the excess sheet pieces on the side, the sheet piece of the second sheet 3' (the sheet piece of the back portion) is folded along the bottom surface 60' of the food 6'. Next, as shown in FIG. 26A, one of the left and right sheet pieces (the sheet piece on one side) is folded so as to overlap the previously folded sheet piece. Next, as shown in FIG. 4B, the other sheet piece on the left or right (the sheet piece on the other side surface) is folded so as to overlap the previously folded sheet piece. Next, as shown in FIG. 1(c), the remaining sheet piece of the first sheet 2' (front sheet piece) is folded so as to overlap the previously folded sheet piece. As a result, the opening 13' of the food packaging bag 1' is closed. Then, when the opening 13' is closed, the tape 8' is adhered to seal the opening 13'. Alternatively, the opening 13' is sealed by attaching a label or joining predetermined portions of the sheet pieces folded and overlapped by welding or the like. A food package is completed through the above steps.

JP 2017-171326 A Japanese Patent Application Laid-Open No. 2003-226307 JP-A-2002-179173

However, when a highly rigid (hard) sheet is used as the second sheet 3', when packaging the food 6', even if the extra sheet piece of the second sheet 3' is folded, the second sheet 3' ' excess sheet piece may rebound due to stiffness and may not conform properly to the bottom surface 60' of the food product 6'. In addition, when a sheet that tends to curl because it is a laminated sheet of different materials is used as the second sheet 3', an excess sheet piece of the second sheet 3' may curl inward or outward. flatness and may not conform properly to the bottom surface 60' of the food product 6'. In these cases, it becomes difficult to cleanly finish the bottom of the food package. If the bottom of the food package is not clean, the appearance of the food package deteriorates and the commercial value of the food package is impaired. In order to prevent this, manual correction is required, which is time-consuming. Alternatively, if it is difficult to correct, it may be discarded.

Therefore, the present invention has been made in view of such circumstances. An object of the present invention is to provide a food packaging bag that can be sealed.

The food packaging bag according to the present invention is
A pair of sheets having a shape in which the other end side is wider than one end side in the first direction is superimposed, and three sides are sealed by a top joint portion on one end side and side joint portions on both sides, and the other end side is A food packaging bag that includes a bag body that serves as an opening and packages a three-dimensional food product having triangular sides and a predetermined width,
Of the regions of the pair of sheets that become extra sheet pieces on the opening side when the food is accommodated in the bag body, it is added to the region sandwiched between two valley fold lines corresponding to both side edges of the bottom surface of the food. A food packaging bag comprising a reinforcing sheet having side edges aligned with or along each valley fold line.

Here, as one aspect of the food packaging bag according to the present invention,
Of the pair of sheets, the sheet to which the reinforcing sheet is added has at least an end region on the opening side,
Plastic sheets are used in the end regions,
A configuration can be adopted in which the excess sheet piece of the sheet to which the stiffening sheet is added consists of a plastic sheet in the edge region.

Further, as another aspect of the food packaging bag according to the present invention,
Of the pair of sheets, the sheet to which the reinforcing sheet is added has at least an end region on the side of the opening and an adjacent region adjacent to the end region,
a plastic sheet is used in the end regions and a sheet with higher rigidity than the plastic sheet is used in the adjacent regions;
The redundant sheet piece of the sheet to which the reinforcing sheet is added can be constructed such that the base is made up of the sheet in the adjacent area and the tip is made up of the plastic sheet in the end area.

Further, as another aspect of the food packaging bag according to the present invention,
Of the pair of sheets, the sheet to which the reinforcing sheet is added is divided into an upper section, a middle section, and a lower section,
A paper sheet or cellophane sheet is used for the middle part, and a plastic sheet is used for the lower part,
The excess sheet piece of the sheet to which the reinforcing sheet is added may be composed of a paper sheet or cellophane sheet with a middle portion as a base portion and a plastic sheet with a lower portion as a tip portion.

Also, in these cases,
A configuration in which the reinforcing sheet is attached to the base can be adopted.

Further, as another aspect of the food packaging bag according to the present invention,
The reinforcing sheet has a first edge that coincides with or follows the mountain fold line of the sheet corresponding to the trailing edge or leading edge of the bottom surface of the food item.

According to the present invention, when packaging food, after the food is accommodated in the bag body, the excess sheet piece on the side of the opening extending from the outer edge of the bottom surface of the food is appropriately folded. A reinforcing sheet is added to a region corresponding to the bottom surface of the food among the sheet pieces to be folded first along the edges of the food, and both side edges of the reinforcing sheet are aligned with both side edges of the bottom surface of the food among the sheet pieces to be folded first. coincides with or along two valley fold lines corresponding to . This makes the portion more rigid than the other portions. As a result, the first sheet piece is folded along the bottom surface of the food product. Therefore, according to the present invention, when food is packaged, the excess sheet piece on the side of the opening after the food is accommodated in the bag body can be neatly folded to close and seal the opening. , the bottom of the food package can be finished neatly.

FIG. 1 is an exploded perspective view of a food packaging bag according to Embodiment 1-1. FIG. 2 is a front view of a food packaging bag according to Embodiment 1-1. FIG. 3 is a rear view of the food packaging bag according to Embodiment 1-1. FIG. 4(a) is a front view of the first sheet of the food packaging bag according to Embodiment 1-1. FIG. 4(b) is a cross-sectional view taken along line AA of FIG. 4(a). FIG. 5(a) is a front view of the second sheet of the food packaging bag according to Embodiment 1-1. FIG. 5(b) is a cross-sectional view taken along line BB of FIG. 5(a). FIG. 6(a) is a front perspective view of a food package in which food is packaged in a food packaging bag according to Embodiment 1-1. FIG. 6B is a perspective view seen from the rear side. FIG. 7 is an explanatory diagram of the manufacturing process of the food packaging bag according to Embodiment 1-1, and is an explanatory diagram of the manufacturing process of the first sheet material (and the second sheet material). FIG. 8 is an explanatory diagram of the manufacturing process of the food packaging bag according to Embodiment 1-1, in which the first sheet material and the second sheet material are overlapped, and then the food packaging bag is finally manufactured. is an explanatory diagram of each process until is completed. FIGS. 9(a) and 9(b) are explanatory views of the process of closing and sealing the opening after the food is accommodated in the food packaging bag according to Embodiment 1-1. FIG. 10 is a rear view of the food packaging bag according to Embodiment 1-2. FIG. 11 is a rear view of the food packaging bag according to Embodiment 1-3. 12 is a rear view of the food packaging bag according to Embodiment 1-4. FIG. 13 is a rear view of the food packaging bag according to Embodiment 1-5. FIG. 14 is a rear view of the food packaging bag according to Embodiment 1-6. FIG. FIG. 15(a) is an explanatory view of the process of closing and sealing the opening after the food is accommodated in the food packaging bag according to Embodiment 1-5. FIG. 15(b) is an explanatory view of the process of closing and sealing the opening after food is accommodated in the food packaging bag according to Embodiment 1-6. FIGS. 16(a) to 16(h) are front views of various modifications of the reinforcing sheet of the food packaging bag. 17 is a rear view of the food packaging bag according to Embodiment 2-1. FIG. FIG. 18(a) is a front view of the second sheet of the food packaging bag according to Embodiment 2-1. FIG. 18(b) is a sectional view taken along line CC of FIG. 18(a). 19 is a rear view of the food packaging bag according to Embodiment 2-2. FIG. FIG. 20(a) is a front view of the second sheet of the food packaging bag according to Embodiment 2-2. FIG. 20(b) is a cross-sectional view taken along line DD of FIG. 20(a). FIG. 21 is a rear view of the food packaging bag according to Embodiment 2-3. FIG. 22(a) is an explanatory view of the process of closing and sealing the opening after the food is accommodated in the food packaging bag according to the alternative embodiment 1. FIG. FIG. 22(b) is an explanatory view of the process of closing and sealing the opening after the food is accommodated in the food packaging bag according to the second embodiment. FIG. 23(a) is an explanatory view of the process of closing and sealing the opening after the food is accommodated in the food packaging bag according to the third embodiment. FIG. 23(b) is an explanatory view of the process of closing and sealing the opening after the food is accommodated in the food packaging bag according to the fourth embodiment. FIG. 24 is a rear view of a conventional food packaging bag. FIGS. 25(a) to 25(c) are explanatory diagrams of the process of packaging food using the food packaging bag. 26(a) to (d) are explanatory diagrams continued from FIG. 25. FIG.

<Overview of food packaging bags>
Various embodiments of food packaging bags for sandwiching food will be described below, but first, items common to each embodiment will be described.

As shown in FIGS. 1 to 3, the food packaging bag 1 includes a bag body 10 and a header portion 15. As shown in FIGS. The bag body 10 is formed by stacking and joining a pair of sheets (a first sheet 2 and a second sheet 3). The first sheet 2 is also called a front sheet, and the second sheet 3 is also called a back sheet. The pair of sheets has a shape in which one of the mutually orthogonal directions is longer than the other, and the other end is wider than the one end. Three sides of the bag body 10 are joined and sealed by a top joint portion 11 on one end side and side joint portions 12, 12 on both sides, and an opening portion 13 is formed on the other end side. The header portion 15 is formed by joining the protruding pieces of the sheets 2 and 3 protruding from the top joint portion 11 to each other at appropriate locations and integrating them. In the following, one of the above (vertical direction in FIGS. 2 and 3) is referred to as the “longitudinal direction” or “first direction”, and the other (horizontal direction in FIGS. 2 and 3) is referred to as the “width direction”. Or it is called "second direction".

The first sheet 2 includes a body portion 20 and a tip portion 21 (the projecting piece described above). The trunk portion 20 has a shape that gradually widens from one end side to the other end side. The tip portion 21 has a narrow shape extending from one end of the trunk portion 20 .

The second sheet 3 includes a body portion 30 and a tip portion 31 (the projecting piece described above). The trunk portion 30 has a shape that gradually widens from one end side to the other end side. The tip portion 31 has a narrow shape extending from one end of the trunk portion 30 .

The trunks 20, 30 are trapezoidal. For this reason, one end of the trunks 20 and 30 (and the other end of the tip portions 21 and 31 that coincide with this) is linear perpendicular to the longitudinal direction. In other words, one end of the trunks 20 and 30 is linear parallel to the width direction. Both side edges of the trunks 20 and 30 are linearly inclined with respect to the longitudinal direction. However, the other end sides of both side edges of the body portions 20 and 30 are cut off by the notch portion 14 . As a result, the other end sides of the body portions 20 and 30 are narrowed by the notch portion 14 .

As also shown in FIG. 4, the first sheet 2 is divided into a plurality of regions in the longitudinal direction. Specifically, the first seat 2 is divided into three regions, an upper step portion 22A, a middle step portion 22B, and a lower step portion 22C. The upper stage portion 22A is divided into the upper portion of the trunk portion 20 and the tip portion 21 . The lower section 22</b>C is defined in the lower portion of the body section 20 . The middle section 22B is partitioned between the upper section 22A and the lower section 22C, that is, the intermediate section of the trunk section 20. As shown in FIG. The upper step portion 22A and the lower step portion 22C have the same height dimension.

The first sheet 2 is composed of three sheets (a middle divided sheet 23 and upper and lower end divided sheets 23, 23) whose edges are overlapped (overlapping portion 24), and the overlapping portion 24 is the first sheet. are joined along the width direction of the sheet 2 (joint portion 25) to form one sheet. In this example, the joint portion 25 is a strip-shaped seal having a predetermined width formed by welding using a heating bar or a heating roller. In the overlapping portion 24, the edge of the divided sheet 23 at the end is arranged on the outer surface side of the edge of the intermediate divided sheet 23, and the edge of the intermediate divided sheet 23 and the edge of the divided sheet 23 at the end are arranged on the outer surface side. , the outer surface of the edge of the middle divided sheet 23 and the inner surface of the edge of the end divided sheet 23 are overlapped so as to face each other.

The intermediate split sheet 23 is a heat-sealable plastic sheet (film) made of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), or the like. As an example, the sheet is a biaxially oriented polypropylene (OPP) sheet (film) or a non-oriented polypropylene (CPP) sheet (film). Alternatively, the sheet is a laminated sheet (film). As one form of the laminated sheet (film), the sheet is formed by laminating a substrate layer, an adhesive layer and a resin layer in order from the outer surface side. Resins such as polyethylene terephthalate (PET), polypropylene (PP), and polyethylene (PE) are used as the base layer. A dry laminate, an extrusion laminate, or the like is used as the adhesive layer. A resin such as polypropylene (PP) or polyethylene (PE) is used as the resin layer. The polypropylene sheet (film) is not only a polypropylene sheet (film) with a purity of 100%, but also a sheet (film) containing polypropylene as a main component and other components (for example, other resin components such as polyethylene). It is a concept that includes It should be noted that the term "sheet" is not defined by thickness, but is a concept that includes films (the same shall apply hereinafter).

On the other hand, the divided sheets 23, 23 at the upper and lower ends are made of paper, unbleached kraft paper, Japanese paper, mixed paper, synthetic paper, glassine paper, paper quality or paper-like (collectively referred to as "paper"), Alternatively, it is a sheet (film) mainly composed of these (these are collectively referred to as a "paper sheet" (film)). The paper may be paper comprising bio-based polyethylene terephthalate (bio-based PET, so-called bio-PET). The sheet has heat-weldability all over at least one side of the inner surface side or the outer surface side, or partially at required locations, as required. For example, the sheet is a laminated sheet (film) in which paper is used as an outer layer and a plastic sheet (film) is used as an inner layer. As one form of the laminated sheet (film), the sheet is formed by laminating a substrate layer, an adhesive layer and a resin layer in order from the outer surface side. Paper is used as the base material layer. A dry laminate, an extrusion laminate, or the like is used as the adhesive layer. A resin such as polypropylene (PP) or polyethylene (PE) is used as the resin layer. As an example, the base layer is paper having a basis weight of about 12 g/m ² or about 15 g/m ² , the adhesive layer is dry laminate, and the resin layer is biaxially oriented polypropylene (OPP).

Alternatively, the divided sheets 23, 23 at the upper and lower ends are ordinary cellophane, moisture-proof cellophane, cellophane-like or cellophane-like (collectively referred to as "cellophane") or sheets (films) mainly composed of these. (These are collectively called "cellophane sheet" (film).). The sheet has heat-weldability all over at least one side of the inner surface side or the outer surface side, or partially at required locations, as required. For example, the sheet is a laminate sheet (film) obtained by laminating cellophane as an outer layer and a plastic sheet (film) as an inner layer. As one form of the laminated sheet (film), the sheet is formed by laminating a substrate layer, an adhesive layer and a resin layer in order from the outer surface side. Cellophane is used as the base material layer. A dry laminate, an extrusion laminate, or the like is used as the adhesive layer. A resin such as polypropylene (PP) or polyethylene (PE) is used as the resin layer. As an example, the substrate layer is plain cellophane or moisture-proof cellophane, the adhesive layer is dry laminate, and the resin layer is biaxially oriented polypropylene (OPP).

The upper stage portion 22A corresponds to the split sheet 23 at the upper end portion. The middle section 22B corresponds to a section of the intermediate divided sheet 23 excluding the upper and lower overlapped sections 24,24. The lower part 22C corresponds to the divided sheet 23 at the lower end. As a result, in the first sheet 2, the upper portion 22A and the lower portion 22C become opaque (or translucent) portions, and the middle portion 22B becomes a transparent portion that allows the inside to be visually recognized.

As also shown in FIG. 5, the second sheet 3 is divided into a plurality of regions in the longitudinal direction. Specifically, the second seat 3 is divided into three regions, an upper step portion 35A, a middle step portion 35B, and a lower step portion 35C. The upper step portion 35A is partitioned into the tip portion 31 . The lower section 35</b>C is defined in the lower portion of the body section 30 . The middle section 35B is partitioned between the upper section 35A and the lower section 35C, that is, the section excluding the lower portion of the trunk section 30. As shown in FIG. The middle step portion 35B has a height dimension greater than that of the middle step portion 22B of the first seat 2 . The upper step portion 35A and the lower step portion 35C have the same height dimension. The upper step portion 35A and the lower step portion 35C have height dimensions smaller than those of the upper step portion 22A and the lower step portion 22C of the first seat 2 .

The second sheet 3 is composed of three sheets (a middle divided sheet 36 and upper and lower end divided sheets 36, 36) overlapped at their edges (overlapped portion 37), and the overlapped portion 37 is the second sheet. are joined along the width direction of the sheet 3 (joint portion 38) to form one sheet. In this example, the joint 38 is a strip-shaped seal having a predetermined width formed by welding using a heating bar or a heating roller. In the overlapping portion 37, the edge of the divided sheet 36 at the end is arranged on the inner surface side of the edge of the intermediate divided sheet 36, and the edge of the intermediate divided sheet 36 and the edge of the divided sheet 36 at the end are arranged. is superimposed so that the inner surface of the edge of the middle divided sheet 36 and the outer surface of the edge of the end divided sheet 36 face each other.

The middle split sheet 36 is a paper sheet or a cellophane sheet. On the other hand, the divided sheets 36, 36 at the upper and lower ends are plastic sheets.

The upper step portion 35A corresponds to a portion of the divided sheet 36 at the upper end portion excluding the overlapping portion 37 . The middle section 35B corresponds to the intermediate split sheet 36 . The lower portion 35C corresponds to a portion of the divided sheet 36 at the lower end portion excluding the overlapping portion 37. As shown in FIG. As a result, in the second sheet 3, the upper portion 35A and the lower portion 35C become transparent portions, and the middle portion 35B becomes an opaque (or translucent) portion.

The top joint 11 is formed by welding the sheets 2,3 along one end of the body 20,30. In this example, the top joint 11 is a strip-shaped seal formed by welding using a heating bar and having a predetermined width.

The side joint portion 12 is formed by welding the sheets 2 and 3 along the side edges (oblique sides) of the body portions 20 and 30 and the side edges (oblique sides) of the tip portions 21 and 31 . In this example, the side joint portion 12 is a strip-shaped seal formed by welding using a heating bar and having a predetermined width. The width of the side joints 12 is smaller than the width of the top joints 11 . Specifically, the side joint 12 has a width of 2 mm or more, more preferably 3 mm or more, and 5 mm or less, more preferably 4 mm or less.

The interior of the bag body 10 configured in this manner serves as a food storage section. An inner sheet 4 is attached to the inner surface of the first sheet 2 in the bag body 10 . The inner sheet 4 is joined, for example, at two points at the other end by point seals (joints 40), and one end is a free end. As a result, even if the food moves within the container, the inner sheet 4 adheres to the surface of the food and follows the movement. Therefore, the first sheet 2 does not get dirty and its appearance is not spoiled.

A cut line 32 is formed in the second sheet 3 in the header portion 15 . The cut line 32 is formed by a full cut line, a half cut line (half cut), a perforation line, or the like. The cut line 32 is formed extending to the edge of the intermediate split sheet 36 . Therefore, the portion of the cut line 32 formed at the edge of the intermediate split sheet 36 functions as an easily tearable portion of the intermediate split sheet 36 . An opening piece 33 is formed on the second sheet 3 in the header portion 15 by forming the cut line 32 . The opening piece 33 has a cut line 32 as an outline, a fixed end between both end points, and a free end at one end. In this example, the cut line 32 is formed in an inverted U shape. Thereby, the opening piece 33 becomes an upward tongue piece.

The second sheet 3 is provided with an opening strip 34 as opening means. The opening strip 34 is provided on the inner surface of the second sheet 3 from the opening piece 33 to the other end side of the second sheet 3 . The strip 34 for opening is provided, for example, along the longitudinal direction at the central portion in the width direction of the second sheet 3 . The opening strip 34 is joined to the inner surface of the second sheet 3 by welding, adhesion, or the like. As an example, the strip 34 for opening is joined to the inner surface of the second sheet 3 by thermal adhesion or self-adhesion after applying a coating agent to the inner surface (the surface facing the second sheet 3). . The strip 34 for opening is, for example, a cut tape, thread, or the like having a strength capable of breaking the second sheet 3 . In this example, the unsealing strip 34 is a band-shaped cut tape with a width of 5 mm or more, or 10 mm or more. The cut tape is obtained by thinly cutting a thermally adhesive plastic sheet such as biaxially oriented polyester or polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), or biaxially oriented polypropylene (OPP).

The food packaging method using the food packaging bag 1 is as described in the background art section. First, the opening 13 is opened, and after the food is accommodated in the bag body 10 from the apex side, the excess sheet piece on the side of the opening 13 extending in the shape of a rectangular tube from the outer edge of the bottom surface of the food is appropriately folded. As a result, the opening 13 is closed and sealed. As a result, the food package 7 is completed as shown in FIG. The food package 7 is kept airtight by sealing the top joint 11 , the side joints 12 , 12 and the opening 13 . Therefore, outside air or the like does not enter inside, and the packaged food 6 maintains the desired quality.

When eating the food 6, the opening piece 33 is grasped and pulled down. The opening piece 33 is joined to one end of the opening strip 34 . Therefore, when the opening piece 33 is picked and pulled down, the opening strip 34 is pulled, the second sheet 3 is broken along both side edges of the opening strip 34, and the second sheet 3 is divided and opened. part is formed. The food 6 can be taken out from this split opening.

A method for manufacturing the food packaging bag 1 is as follows. The food packaging bag 1 is manufactured through a step (first step) of manufacturing a first sheet raw material 2X in which the first sheet 2 is continuous, shown in FIG. 7, and a second sheet 3, shown in FIG. The step of manufacturing the second sheet material 3X (second step), the step of manufacturing the food packaging bag 1 from the first sheet material 2X and the second sheet material 3X shown in FIG. process).

As shown in FIG. 7, in the first step, a raw sheet roll obtained by winding a raw divided sheet 23X in which the divided sheet 23 in the middle is continuous, and a divided sheet in which the divided sheets 23 at the ends are continuous. Two sheet material rolls each having the material 23X wound in a roll shape are rotatably held. The pair of edge divided sheet original fabrics 23X, 23X have the same width. The intermediate sheet material division 23X and the pair of end sheet material divisions 23X, 23X are drawn out and supplied from each sheet material roll. The pair of edge split sheet fabrics 23X, 23X are supplied so as to sandwich the intermediate split sheet fabric 23X, and each side edge of the intermediate split sheet fabric 23X and the side of the edge split sheet fabric 23X are supplied. The edges are overlapped (overlapped portion 24), and the overlapped portion 24 is joined to form one raw sheet.

As shown in FIG. 7, in the second step, a sheet material roll in which a divided sheet material 36X in which the intermediate divided sheet 36 is continuous is wound in a roll shape, and a divided sheet material in which the end portions are continuously divided Two original sheet rolls each having 36X wound in a roll shape are rotatably held. The pair of edge divided sheet original fabrics 36X, 36X have the same width. The middle divided sheet material 36X and the pair of end divided sheet materials 36X, 36X are delivered from the respective sheet material rolls and supplied. The pair of edge split sheet fabrics 36X, 36X are supplied so as to sandwich the intermediate split sheet fabric 36X. The edges are overlapped (overlapped portion 37), and the overlapped portion 37 is joined to form one raw sheet.

The raw sheets 2X and 3X are manufactured in this way. Then, after being wound into a roll once, the roll is set in the bag-making device, or the original sheet 2X, 3X is manufactured by the bag-making device, and is continuously conveyed and then , to the third step.

As shown in FIG. 8, in the third step, the first raw sheet 2X to which the inner sheet 4 is joined, and the second raw sheet 2X to which the cut line 32 is formed and the unsealing strip 34 is joined. While overlapping the original sheet 3X so that the inner surfaces face each other and intermittently conveying in this state, i) a step of forming the top joint portion 11 (step 3-1), ii) side joint a step of forming the portion 12 (step 3-2, which may be performed simultaneously with step 3-1); iii) cutting the side joint portion 12 along the middle line of the side joint portion 12; , a step of individually separating the food packaging bag 1 (step 3-3), and iv) a step of forming the notch 14 (step 3-4).

This type of food packaging bag 1 having a trapezoidal shape is manufactured so as to be laterally opposite to the transport direction of the original sheets 2X and 3X because of its shape. That is, the opening 13 is formed on one side in the width direction (TD) orthogonal to the conveying direction (MD) of the raw sheets 2X and 3X, and the header portion 15 is formed on the other side in the width direction. The packaging bag 1 and the food packaging bag 1 having the opening 13 formed on the other side in the width direction and the header portion 15 formed on the one side in the width direction are alternately manufactured. In FIG. 8, the structure related to the former food packaging bag 1 is denoted by "A" after the symbol, and the structure related to the latter food packaging bag 1 is denoted by "B" after the symbol. there is

For this reason, in the adjacent food packaging bags 1, 1, i) the intermediate divided sheet 23 related to the middle stage portion 22B of the first sheet 2 of one food packaging bag 1 and the other food packaging bag 1 The intermediate divided sheet 23 related to the middle portion 22B of the first sheet 2 is composed of the same sheet (middle divided sheet material 23X), and ii) the upper portion of the first sheet 2 of one food packaging bag 1 The end divided sheet 23 related to the portion 22A and the end divided sheet 23 related to the lower stage portion 22C of the first sheet 2 of the other food packaging bag 1 are the same sheet (end divided sheet raw fabric 23X ), and iii) the intermediate divided sheet 36 related to the middle portion 35B of the second sheet 3 of one food packaging bag 1 and the middle portion 35B of the second sheet 3 of the other food packaging bag 1 is composed of the same sheet (intermediate divided sheet raw fabric 36X), and iv) the end divided sheet related to the upper part 35A of the second sheet 3 of one food packaging bag 1 36 and the end divided sheet 36 related to the lower part 35C of the second sheet 3 of the other food packaging bag 1 are composed of the same sheet (end divided sheet material 36X).

The overall flow of the third step is roughly the same as that described in JP-A-2005-219319. However, in what is described in this patent document, the side joints are formed by fusing. In contrast, in this example, the side joints 12 are formed by welding and cutting. For welding, a heating bar having a width of the side joints 12, 12 of the adjacent food packaging bags 1, 1, that is, twice the width of the side joints 12 is used. A Thomson blade is used for cutting. Incidentally, the steps 3-3 and 3-4 may be performed simultaneously by punching out the food packaging bag 1 using a full circumference Thomson blade.

As described above, according to the food packaging bag 1 according to this example, the sheets 2 and 3 are partly made of paper sheets or cellophane sheets. Paper sheets and cellophane sheets tend to crease more than plastic sheets. Therefore, the sheets 2 and 3 are sharply bent at each side of the food package 7, and the food package 7 has a sharp appearance. Therefore, according to the food packaging bag 1 according to this example, in the state of the food package 7, there is an advantage that the appearance is excellent, the stability is excellent, and the self-supporting state is excellent.

Also, paper sheets and cellophane sheets are more rigid (harder) than plastic sheets. As a result, the sheets 2 and 3 are stiffened, and in the state of the food package 7, there is an effect that the self-supporting property is improved. Moreover, the stiffness of the sheets 2 and 3 improves the rigidity of the food package 6 . Therefore, according to the food packaging bag 1 according to this example, the effect of preventing the food 6 from losing its shape is high.

Moreover, according to the food packaging bag 1 according to this example, the amount of plastic used can be reduced by using a paper sheet or a cellophane sheet. In recent years, waste plastics have become a worldwide environmental problem, but the food packaging bag 1 according to this example is an effective measure against this environmental problem.

Further, according to the food packaging bag 1 according to this example, the upper portion 22A of the first sheet 2 is divided into the upper portion of the bag body 10 and the header portion 15, and the lower portion 22C is divided into the lower portion of the bag body 10. partitioned. As a result, in the state of the food package 7, the upper and lower portions of the standing food 5 are hidden by the opaque upper portion 22A and the lower portion 22C, and only the central portion of the food 5 is the transparent middle portion 22B. becomes visible from That is, only the central portion of the food 5 that looks the most delicious is visible and emphasized. Therefore, according to the food packaging bag 1 according to the present example, in the state of the food package 7, it is possible to arouse the purchase intention of the purchaser.

Further, according to the food packaging bag 1 according to this example, the side joints 12 are formed in a strip shape with a predetermined width along the side edges of the bag body 10 and the side edges of the header portion 15 . As a result, in the state where the food package 7 is formed, the side joints 12 are laid down backward as shown in FIG. Then, the header portion 15 is in an upright state because pillars are formed on both sides. Moreover, the header portion 15 is in a flat state extending straight from the front portion of the bag body 10 . Therefore, according to the food packaging bag 1 according to the present example, the appearance of the food packaging body 7 can be improved, and the header portion 15 can be improved when displayed in a store such as a convenience store. It is possible to make it easy to visually recognize the display in.

<Embodiment 1-1>
As shown in FIGS. 3 and 9, the food packaging bag 1 includes a reinforcing sheet 5. As shown in FIG. The reinforcing sheet 5 is formed on the side edges 60b and 60b of the bottom surface 60 of the food 6 in the area of the second sheet 3 which becomes an extra sheet piece on the side of the opening 13 when the food 6 is accommodated in the bag body 10. It is added to the area sandwiched between the two valley fold lines L3, L3 corresponding to 60b. In this example, the reinforcing sheet 5 has stickiness or adhesiveness on the inner surface side, and is attached to the outer surface of the second sheet 3 (of the middle section 35B). Alternatively, the reinforcing sheet 5 may be joined to the outer surface of the second sheet 3 by welding as long as the inner surface side thereof has heat-welding properties.

The reinforcing sheet 5 is a paper sheet or a plastic sheet. However, the reinforcing sheet 5 is not a thin sheet that constitutes the sheets 2 and 3, but a sheet that is thick and has higher rigidity (harder) than the sheets 2 and 3. As shown in FIG. The paper sheets of the sheets 2, 3 have a thickness of 25 to 60 μm, the plastic sheets of the sheets 2, 3 have a thickness of 15 to 40 μm, while the reinforcing sheet 5 has a thickness of 50 to 150 μm. As an example, the reinforcing sheet 5 is a label base material used for labels.

The reinforcing sheet 5 has a rectangular shape with a first edge 5a, left and right side edges 5b, 5b, and a second edge 5c. More specifically, the second edge 5c is longer than the first edge 5a, and along with this, the left and right side edges 5b, 5b are spaced from the first edge 5a toward the second edge 5c. is the wide hypotenuse. Therefore, the reinforcing sheet 5 has an isosceles trapezoidal shape.

The first edge 5a is inside the mountain fold line L2 of the second sheet 3 corresponding to the trailing edge 60a of the bottom surface 60 of the food product 6 and along the mountain fold line L2. The side edge 5b is inside the valley fold line L3 of the second sheet 3 corresponding to the side edge 60b of the bottom surface 60 of the food 6 and along the valley fold line L3. The second edge 5c is inside the boundary line 35bc between the middle step portion 35B and the lower step portion 35C of the second sheet 3 and along the boundary line 35bc. The distance Da between the mountain fold line L2 and the first edge 5a and the distance Db between the valley fold line L3 and the side edge 5b are each 15 mm or less, preferably 12 mm or less, and even more preferably 8 mm or less.

The width of the two valley fold lines L3, L3 swells in the middle part, and the side edges 5b, 5b become oblique sides correspondingly because the ingredients of the food 6 are thick. This corresponds to the fact that the width of 60 expands in the middle portion.

An unsealing strip 34 is interposed on the inner surface side of the reinforcing sheet 5 . For this reason, an easily breakable portion 50 is formed in the edge portion of the reinforcing sheet 5 related to the first edge 5a. The easily breakable portion 50 is a plurality of cut lines arranged in parallel along the edge. Alternatively, the easy-to-break portion 50 may be a pair of cut lines or a pair of notches cut at a predetermined length from the first edge 5a toward the second edge 5c at positions sandwiching the opening strip 34. good too. Alternatively, the breakable portion 50 may be a group of fine scratches or the like formed along the edge.

As shown in FIG. 9( a ), the reinforcing sheet 5 is used to replace the extra sheet piece of the second sheet 3 (the sheet piece first folded along the bottom surface 60 of the food 6 ) when packaging the food 6 . Among them, it is arranged in a region corresponding to the bottom surface 60 of the food 6 . This makes the portion more rigid than the other portions. The first edge 5a of the reinforcing sheet 5 extends along the mountain fold line L2 of the second sheet 3, and the side edges 5b, 5b of the reinforcing sheet 5 extend along the two valleys of the second sheet 3. It is along folding lines L3, L3. Due to these edge actions, the excess sheet piece of the second sheet 3 is easily folded along the mountain fold line L2 and the two valley fold lines L3, L3. As a result, the excess sheet piece of the second sheet 3 is folded along the bottom surface 60 of the food product 6 correctly.

For this reason, as shown in FIG. 9B, after the extra sheet piece of the second sheet 3 is folded, the overlapping portion of the folded sheet piece and the unfolded sheet piece is Of these, the portion along the two valley fold lines L3, L3 of the second sheet 3 and the portion along the valley fold line L4 of the second sheet 3 corresponding to the front edge 60c of the bottom surface 60 of the food 6 are Smooth and reliable joining can be achieved (joints 16, 16, 17). By the formation of the joints 16, 16, and 17, the opening 13 is sufficiently sealed at this stage.

By the way, the size of the reinforcing sheet 5 is not so large that it advances to the lower portion 35C of the second sheet 3 and the second edge 5c coincides with or follows the valley fold line L4 of the second sheet 3. . The reason why the reinforcing sheet 5 is not provided for the lower portion 35C is that i) the lower portion 35C is a plastic sheet, but the plastic sheet has lower rigidity (softer) than the paper sheet or the cellophane sheet, and the reinforcing sheet is not used. This is because the plastic sheet is likely to be valley-folded without using the edge action of 5, and ii) the plastic sheet is less prone to curling, and there is less need for correction by the reinforcing sheet 5.

As shown in FIG. 8, the reinforcing sheet 5 is added in the third step of the manufacturing method of the food packaging bag 1. As shown in FIG. That is, the third step additionally includes a step of adhering the reinforcing sheet 5 to the outer surface of the second sheet 2X (step 3-0). Step 3-0 is performed before Step 3-1 or Step 3-2, or is performed simultaneously with Step 3-1 or Step 3-2, or Step 3-1 or after step 3-2. Alternatively, step 3-0 may be performed after step 3-4.

As described above, according to the food packaging bag 1 according to the present embodiment, when the food 6 is packaged, the excess sheet pieces on the side of the opening 13 after the food 6 is accommodated in the bag body 10 are neatly removed. The opening 13 can be closed and sealed by folding, and the bottom of the food package 7 can be neatly finished.

<Embodiment 1-2>
This embodiment differs from Embodiment 1-1 in the size of the reinforcing sheet 5 . Other than this point, both embodiments are the same. Therefore, in the following, different points will be described, and description of the same points will be omitted as they are the same as those of Embodiment 1-1.

As shown in FIG. 10, the first edge 5a of the reinforcing sheet 5 coincides with the mountain fold line L2 of the second sheet 3. As shown in FIG. A side edge 5 b of the reinforcing sheet 5 is aligned with the valley fold line L 3 of the second sheet 3 .

As described above, the food packaging bag 1 according to this embodiment also has the same effects as the food packaging bag 1 according to Embodiment 1-1.

<Embodiment 1-3>
This embodiment differs from Embodiment 1-1 in that the reinforcing sheet 5 is added. Other than this point, both embodiments are the same. Therefore, in the following, different points will be described, and description of the same points will be omitted as they are the same as those of Embodiment 1-1.

As shown in FIG. 11, a reinforcing sheet 5 is added to the inner surface of the second sheet 3 . In this example, the reinforcing sheet 5 has stickiness or adhesion on the inner surface side, and is adhered to the inner surface of the second sheet 3 (of the middle section 35B). Alternatively, the reinforcing sheet 5 may be joined to the inner surface of the second sheet 3 by welding as long as the reinforcing sheet 5 has heat-welding properties on the inner surface side.

As described above, the food packaging bag 1 according to this embodiment also has the same effects as the food packaging bag 1 according to Embodiment 1-1.

<Embodiment 1-4>
The difference of this embodiment from Embodiment 1-1 lies in the shape of the reinforcing sheet 5 . Other than this point, both embodiments are the same. Therefore, in the following, different points will be described, and description of the same points will be omitted as they are the same as those of Embodiment 1-1.

As shown in FIG. 12, since the side edges 5b, 5b of the reinforcing sheet 5 are vertical sides, the reinforcing sheet 5 has a rectangular shape. When the ingredients of the food 6 are not so thick, the bottom 60 of the food 6 has a rectangular shape. Therefore, the two valley fold lines L3, L3 of the second sheet 3 are parallel lines, and correspondingly, the side edges 5b, 5b are vertical sides.

As described above, the food packaging bag 1 according to this embodiment also has the same effects as the food packaging bag 1 according to Embodiment 1-1.

<Embodiment 1-5>
This embodiment differs from Embodiment 1-1 in the size and shape of the reinforcing sheet 5 . Other than this point, both embodiments are the same. Therefore, in the following, different points will be described, and description of the same points will be omitted as they are the same as those of Embodiment 1-1.

As shown in FIGS. 13 and 15(a), the reinforcing sheet 5 advances to the lower portion 35C of the second sheet 3, and the second edge 5c extends along the valley fold line L4 of the second sheet 3. The size is up to Further, in response to the expansion of the width of the two valley fold lines L3, L3 of the second sheet 3 at the intermediate portion, the side edges 5b, 5b of the reinforcing sheet 5 are bent or folded so that the width is expanded at the central portion. A curved curve.

As described above, the food packaging bag 1 according to this embodiment also has the same effects as the food packaging bag 1 according to Embodiment 1-1.

<Embodiment 1-6>
This embodiment differs from Embodiments 1-4 in the size of the reinforcing sheet 5 . Other than this point, both embodiments are the same. Therefore, in the following, different points will be described, and description of the same points will be omitted as they are the same as those of Embodiments 1-1 and 1-4.

As shown in FIGS. 14 and 15(b), the reinforcing sheet 5 advances to the lower portion 35C of the second sheet 3, and the second edge 5c extends along the valley fold line L4 of the second sheet 3. The size is up to Further, both side edges 5b, 5b of the reinforcing sheet 5 are straight lines corresponding to the fact that the two valley fold lines L3, L3 of the second sheet 3 are parallel lines.

As described above, the food packaging bag 1 according to this embodiment also has the same effects as the food packaging bag 1 according to Embodiment 1-1.

<Various Modifications of Reinforcement Sheet 5>
As shown in FIG. 16, the reinforcing sheet 5 has a pair of tear guide lines 51, 51 extending from the first edge 5a to the second edge at positions sandwiching the unsealing strip 34. As shown in FIG. The fracture guide line 51 shown in FIGS. 16(a) and 16(b) is a perforation. The fracture guide lines 51 shown in FIGS. 16(e) and 16(f) are V-shaped full cutting lines or half cutting lines (half cuts) arranged linearly at regular intervals. The fracture guide lines 51 shown in FIGS. 16(g) and (h) are Y-shaped full cutting lines or half cutting lines (half cuts) arranged linearly at regular intervals. As shown in FIGS. 16(a), (b), (e) to (h), the reinforcing sheet 5 may use both the easily breaking portion 50 and the breaking guide lines 51, 51. FIG. Alternatively, as shown in FIGS. 16(c) and 16(d), the reinforcing sheet 5 may be provided with only the break guide lines 51, 51. FIG.

<Embodiment 2-1>
This embodiment differs from Embodiments 1-4 in the size of the reinforcing sheet 5 and the location where the reinforcing sheet 5 is added. Other than this point, both embodiments are the same. Therefore, in the following, different points will be described, and description of the same points will be omitted as they are the same as those of Embodiments 1-1 and 1-4.

As shown in FIGS. 17 and 18, the reinforcing sheet 5 extends to the top joint 11 and is sized so that the first edge 5 a intersects the score line 32 . In addition, corresponding to the two valley fold lines L3, L3 of the second sheet 3 and the following two mountain fold lines L1, L1 of the second sheet 3 becoming parallel lines, both sides of the reinforcing sheet 5 are folded. The edges 5b, 5b are straight. Therefore, the reinforcing sheet 5 has a rectangular shape elongated along the longitudinal direction of the second sheet 3 .

A reinforcing sheet 5 is added to the inner surface of the second sheet 3 . The reinforcing sheet 5 is joined to the inner surface of the second sheet 3 (joint portion 52). In this example, the reinforcing sheet 5 has a heat-welding property, and the joining portion 52 is formed by welding using a heating bar or a heating roller. It is a strip-shaped seal having a predetermined width over the . For example, the joints 52 are formed at three locations on both sides and the center of the reinforcing sheet 5 . Alternatively, the reinforcing sheet 5 may have stickiness or adhesiveness on the inner surface side and be attached to the inner surface of the second sheet 3 .

The cut line 32 is formed so as to extend to the edge related to the first edge 5 a of the reinforcing sheet 5 . Therefore, the portion of the cut line 32 formed at the edge of the reinforcing sheet 5 functions as an easily broken portion of the reinforcing sheet 5 . The reinforcing sheet 5 is provided with a pair of breaking guide lines 53, 53 extending along the longitudinal direction of the reinforcing sheet 5 from both end points of the cut line 32 toward the second edge 5c. In this example, the break guide line 53 is a perforation.

As described above, the food packaging bag 1 according to this embodiment also has the same effects as the food packaging bag 1 according to Embodiment 1-1.

<Embodiment 2-2>
This embodiment differs from Embodiment 2-1 in the opening means. Other than this point, both embodiments are the same. Therefore, in the following, different points will be described, and description of the same points will be omitted as they are the same as those of Embodiments 1-1 and 2-1.

As shown in FIGS. 19 and 20, the opening means is an opening strip 34. As shown in FIGS. The unsealing strip 34 is joined to the inner surface of the reinforcing sheet 5 by welding, adhesion, or the like. At the time of opening, the opening strip 34 breaks the second sheet 3 and the reinforcing sheet 5 at the same time.

As described above, the food packaging bag 1 according to this embodiment also has the same effects as the food packaging bag 1 according to Embodiment 1-1.

<Embodiment 2-3>
This embodiment differs from Embodiment 2-1 in the opening means. Other than this point, both embodiments are the same. Therefore, in the following, different points will be described, and description of the same points will be omitted as they are the same as those of Embodiments 1-1 and 2-1.

As shown in FIG. 21, the opening means utilizes the directionality of the reinforcing sheet 5 . The reinforcing sheet 5 has tear directionality (linear cutability) in the longitudinal direction. Therefore, the reinforcing sheet 5 is provided with neither a break guide line nor an unsealing strip.

As described above, the food packaging bag 1 according to this embodiment also has the same effects as the food packaging bag 1 according to Embodiment 1-1.

It should be noted that the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention.

In the above embodiment, the extra sheet piece of the second sheet 3 (the sheet piece that is first folded along the bottom surface 60 of the food product 6) has a size that completely covers the bottom surface 60 of the food product 6. However, the invention is not limited to this. For example, as shown in FIG. 22, the extra sheet piece of the second sheet 3 may have a size that does not cover a portion of the bottom surface 60 of the food 6 (the portion on the front end 60c side).

Further, in the above-described embodiment, the tip portion of the extra sheet piece of the second sheet 3 (corresponding to the lower portion 35C of the second sheet 3) is a plastic sheet. As a result, as described above, it is possible to obtain the effect that the leading end portion of the sheet piece is less likely to curl. However, the invention is not limited to this. For example, as shown in FIG. 23, the leading edge of the sheet strip may be a paper sheet or a cellophane sheet. As an example, if the second sheet consists of a single sheet of paper or cellophane, then the leading edge of the sheet strip is of course the sheet of paper or cellophane.

In the above embodiment, at least one of the pair of sheets 2 and 3 is divided into a plurality of regions in the first direction, and each region and the other sheet when not divided into a plurality of regions are made of plastic. Either sheets, paper sheets or cellophane sheets are selectively used. However, a nonwoven fabric may be used as the sheet.

Also, in the above embodiment, the first sheet piece to be folded along the bottom surface 60 of the food 6 is an extra sheet piece of the second sheet 3 . However, the first sheet piece to be folded may be an extra sheet piece of the first sheet 2 . In this case the reinforcing sheet 5 is added to the first sheet 2 .

Moreover, the header portion is not essential in the food packaging bag. For example, it may be a food packaging bag that does not have a header and is composed only of a bag body.

In addition, "triangular shape", "right triangle shape", "rectangular shape", "square tube shape", "trapezoid shape", "isosceles trapezoid shape", "straight line", "central part", "end part", In the present invention, terms such as "side", "coincidence", "same", "parallel", and "perpendicular" that specify a shape, site or state are used in the present invention. It also includes the concept of

Also, in the above embodiments, the food is a sandwich. However, the food to be packaged may be western confectionery such as cake, Japanese confectionery such as sponge cake, processed rice such as bread, or rice ball, as long as it can be accommodated in the food packaging bag. is not particularly limited.

Also, as long as there is no physical interference, applying the technical elements described above to other embodiments or examples, replacing the technical elements described above with technical elements according to other embodiments or examples It is naturally possible to combine the technical elements described above, etc., and this is naturally intended by the present invention.

DESCRIPTION OF SYMBOLS 1... Food packaging bag, 10... Bag main body, 11... Top joint part, 12... Side joint part, 13... Opening part, 14... Notch part, 15... Header part, 16... Joint part, 17... Joint part, 2... First sheet 2X... First sheet material 20... Body part 21... Tip part 22A... Upper stage part 22B... Middle stage part 22C... Lower stage part 23... Divided sheet 23X... Divided sheet Original fabric 24 Overlapping portion 25 Joining portion 3 Second sheet 3X Second sheet original fabric 3a Opening edge 30 Body portion 31 Tip portion 32 Notch Line, 33... Opening piece, 34... Strip for opening, 35A... Upper part, 35B... Middle part, 35C... Lower part, 35bc... Boundary line, 36... Divided sheet, 36X... Divided sheet raw fabric, 37... Overlapping Part 38 Joint part 4 Inner sheet 40 Joint part 5 Reinforcement sheet 5a First edge 5b Side edge 5c Second edge 50 Easy breakable part 51 Break Guide wire 52 Joint portion 53 Breaking guide wire 6 Food (sandwich) 60 Bottom 60a Rear edge 60b Side edge 60c Front edge 7 Food package 8 Tape L1... Mountain fold line of the second sheet 3 corresponding to the intersection line between the back surface and the side surface of the food 6, L2... Mountain fold line of the second sheet 3 corresponding to the trailing edge 60a of the bottom surface 60 of the food 6, L3 ... valley fold line of the second sheet 3 corresponding to the side edge 60b of the bottom surface 60 of the food product 6, L4... valley fold line of the second sheet 3 corresponding to the front edge 60c of the bottom surface 60 of the food product 6, L5... folded back mountain fold line of the second sheet 3, Da... distance between mountain fold line L2 and first edge 5a, Db... distance between valley fold line L3 and side edge 5b

Claims (6)

A pair of sheets having a shape in which the other end side is wider than one end side in the first direction is superimposed, and three sides are sealed by a top joint portion on one end side and side joint portions on both sides, and the other end side is A food packaging bag that includes a bag body that serves as an opening and packages a three-dimensional food product having triangular sides and a predetermined width,
Of the regions of the pair of sheets that become extra sheet pieces on the opening side when the food is accommodated in the bag body, it is added to the region sandwiched between two valley fold lines corresponding to both side edges of the bottom surface of the food. A food packaging bag comprising a reinforcing sheet having side edges aligned with or along each valley fold line. Of the pair of sheets, the sheet to which the reinforcing sheet is added has at least an end region on the opening side,
Plastic sheets are used in the end regions,
2. The food packaging bag according to claim 1, wherein the excess sheet piece of the sheet to which the reinforcing sheet is added is composed of a plastic sheet having an end region at the tip. Of the pair of sheets, the sheet to which the reinforcing sheet is added has at least an end region on the side of the opening and an adjacent region adjacent to the end region,
a plastic sheet is used in the end regions and a sheet with higher rigidity than the plastic sheet is used in the adjacent regions;
2. The food packaging bag according to claim 1, wherein the excess sheet piece of the sheet to which the reinforcing sheet is added is composed of the base of the sheet in the adjacent region and the tip of the plastic sheet in the end region. Of the pair of sheets, the sheet to which the reinforcing sheet is added is divided into an upper section, a middle section, and a lower section,
A paper sheet or cellophane sheet is used for the middle part, and a plastic sheet is used for the lower part,
2. The food packaging bag according to claim 1, wherein the excess sheet piece of the sheet to which the reinforcing sheet is added is composed of a paper sheet or cellophane sheet with a middle portion as a base and a plastic sheet with a lower portion as a tip. The food packaging bag according to claim 3 or 4, wherein the reinforcing sheet is attached to the base. 6. Food packaging according to any one of claims 1 to 5, wherein the reinforcing sheet has a first edge that coincides with or follows a mountain fold line of the sheet corresponding to the trailing edge or leading edge of the bottom surface of the food. bag.

Images