Sealable bag and method for manufacturing a sealed bag

Abstract

The present invention provides a sealed bag and a method for manufacturing a sealed bag that can improve quality. [Solution] The sealed envelope 10 comprises a bag body 11 formed in the shape of a bag from tack paper 13, on which an adhesive sheet 15 is peelably attached to release paper. The bag body 11 is made into a bag shape by folding along folds 41 to 43 so that the adhesive sheet 15 is on the outside. The bag body 11 is provided with a plurality of seals 31 which are part of the adhesive sheet 15 and can be separated and peeled off from the rest of the bag body 11. Perforations 46 to 48 are formed along the folds 41 to 43 of the bag body 11.

Description

Technical Field

[0001] The present invention relates to a bag body with a seal and a method for manufacturing the bag body with a seal.

Background Art

[0002] Conventionally, for office or household bag bodies, pouches, envelopes for congratulations, envelopes, etc. have been used. Patent Document 1 discloses a bag body with a seal provided with a peelable seal on such a bag body. According to this bag body with a seal, after the use as a bag body is finished, the seal can be peeled off from the bag body and pasted to enjoy.

[0003] Specifically explaining the bag body with a seal of Patent Document 1, this bag body is formed of a tack paper in which an adhesive sheet is peelably bonded to release paper, and is formed into a bag shape by being folded along a crease so that the adhesive sheet faces the outside. Further, a seal is formed by a part of the adhesive sheet on the bag body. The seal is separated by a cut from the other part of the adhesive sheet and is peelable.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the bag body with a seal of the above Patent Document 1, since the bag body is formed of a tack paper (multi-layer paper) in which an adhesive sheet and release paper are bonded together, the thickness of the bag body is relatively large. Therefore, it is considered difficult to fold the bag body firmly just by folding it along the crease.

[0006] Furthermore, at the folds where the bag body is bent, the adhesive sheet is more likely to peel off from the release paper, and lifting of the adhesive sheet from the release paper is likely to occur.

[0007] Therefore, the sealed bag described in Patent Document 1 still has room for improvement in terms of quality.

[0008] This invention has been made in view of the above circumstances, and its main objective is to provide a sealed bag and a method for manufacturing a sealed bag that can improve quality. [Means for solving the problem]

[0009] To solve the above problems, the sealed bag of the present invention is The bag body is formed in a bag shape using tack paper, on which an adhesive sheet is peelably bonded to a release paper. The bag body is formed into a bag shape by folding along the folds so that the adhesive sheet is on the outside. The bag body is a sealed bag body provided with a part of the adhesive sheet that is separated from the other part and is peelable, Perforations are formed along the fold in the bag body. [Effects of the Invention]

[0010] According to the present invention, perforations are formed along the folds of the bag body. In this case, the bag body can be easily folded along the folds. Therefore, it is possible to firmly fold the bag body, which is relatively thick due to being made of adhesive paper.

[0011] Furthermore, the perforations formed along the folds of the bag allow the adhesive sheet and release liner to interlock at the folds. This enhances the sense of unity between the adhesive sheet and release liner at the folds. As a result, it is possible to suppress the lifting of the adhesive sheet relative to the release liner at the folds.

[0012] Therefore, based on the above, it is possible to improve the quality of the bag itself (and by extension, the sealed bag). [Brief explanation of the drawing]

[0013] [Figure 1] (a) is a front view of the envelope with a seal, and (b) is a back view of the envelope with a seal. [Figure 2] This is a diagram showing the unfolded state of a small envelope with a sticker attached. [Figure 3] This is a rear view showing the bag after the protruding piece has been detached from the bag body and the bag body has been sealed with a sealing sticker. [Figure 4] This is a diagram illustrating the manufacturing process for self-adhesive envelopes. [Figure 5] (a) is a rear view illustrating the first step of the bag-making process, and (b) is a rear view illustrating the second step of the bag-making process. [Figure 6] This shows a more concrete example of a self-adhesive envelope, with (a) being the front view, (b) the back view, and (c) the unfolded diagram. [Modes for carrying out the invention]

[0014] An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the sealable bag of the present invention is embodied as a sealable small envelope. Figure 1 shows (a) a front view of the sealable small envelope 10 and (b) a rear view of the sealable small envelope 10. Figure 2 is an unfolded view showing the sealable small envelope 10 in an unfolded state. In Figure 2, the cross-section of the adhesive paper 13 is also shown within the circular frame.

[0015] As shown in Figures 1(a) and (b), the sealable envelope 10 comprises a bag body 11 formed in the shape of a bag and a protruding piece 12 that protrudes from the bag body 11. The bag body 11 and the protruding piece 12 are integrally formed from adhesive paper 13.

[0016] As shown in FIG. 2, the sticker paper 13 is a multi-layer paper in which an adhesive sheet 15 is detachably bonded to a release paper 14. The adhesive sheet 15 has an adhesive layer 17 provided on one side of a base material 16, and is bonded to the release paper 14 by the adhesive layer 17 . The base material 16 is formed of, for example, a paper material or a film material. Further, the adhesive layer 17 is formed of, for example, an acrylic-based adhesive (paste).

[0017] The bag body 11 is formed into a bag shape by being bent along the creases 41 to 43 so that the adhesive sheet 15 faces outward. The bag body 11 has a front surface portion 21, a pair of side portions 22 and 23, and a pair of flap portions 24 and 25. The front surface portion 21 is a portion that forms the front surface of the bag body 11 and has a vertically long rectangular shape.

[0018] The pair of side portions 22 and 23 are respectively connected to the left and right sides of the front surface portion 21, bent to the back side of the front surface portion 21, and bonded to each other. In this case, the side edges of each of the side portions 22 and 23 are overlapped with each other, and the overlapped side edges are bonded to each other by an adhesive (paste). Further, when the side portions 22 and 23 are bonded to each other, a back surface portion 26 that forms the back surface of the bag body 11 is formed by the side portions 22 and 23.

[0019] In the bonding portion 27 (see also FIG. 3) where the side portions 22 and 23 are bonded, the side portions 22 and 23 are bonded in a state where the side portion 22 is arranged on the inner side and the side portion 23 is arranged on the outer side. Therefore, the side portion 22 can be referred to as the lower front (under the paste), and the side portion 23 can be referred to as the upper front. Further, the bonding portion 27 extends in the vertical direction and is located at the center portion in the left-right direction of the bag body 11. Therefore, the bag body 11 is so-called center-bonded.

[0020] Each flap section 24, 25 includes a lower flap section 24 connected to the underside of the surface section 21 and an upper flap section 25 connected to the top side of the surface section 21. The lower flap section 24 is folded so as to overlap each side section 22, 23 (i.e., the back surface 26) and is attached to the back surface 26 with adhesive (glue). The lower flap section 24 is also called the bottom. The upper flap section 25 is the part that is folded so as to overlap each side section 22, 23 (i.e., the back surface 26) in order to seal the bag body 11 (more specifically, the opening of the bag body 11). The upper flap section 25 corresponds to the "upper flap section".

[0021] The bag body 11 is provided with multiple peelable seals 31. These seals 31 are part of an adhesive sheet 15. The adhesive sheet 15 has cuts 33 (so-called half-cuts) formed around each seal 31. Each seal 31 can be separated from the rest of the adhesive sheet 15 and peeled off by these cuts 33. The surface of the seals 31 displays images of animals, characters, etc. However, the surface of the seals 31 may also display text, symbols, or other information besides images.

[0022] The multiple seals 31 include multiple seals 31a provided on the front surface 21 of the bag body 11 and multiple seals 31b provided on the back surface 26 (see also Figure 3). In this embodiment, there are three or more of each type of seal 31a and 31b. In addition, each seal 31 (31a, 31b) is positioned at a location at least 3 mm away from the folds 41-43 of the bag body 11.

[0023] In the adhesive sheet 15, the area excluding each seal 31 is a non-seal area 35. The non-seal area 35 spans both the front surface 21 and the back surface 26 of the bag body 11. Although not shown in the illustration, a pattern is displayed on the surface of the non-seal area 35. However, other displays such as letters or symbols may also be displayed on the surface of the non-seal area 35.

[0024] The back surface 26 of the bag body 11 is provided with a writing area 37 on the surface of the non-sealed area 35 for writing information such as text. The writing area 37 is a white, elongated area located at the bottom of the side portion 22 of the back surface 26. Information such as names and amounts can be written in the writing area 37.

[0025] Next, we will explain the folds provided in the bag body 11.

[0026] In the bag body 11, a fold 41 is formed at the boundary between the surface portion 21 and the side portion 22. The side portion 22 is folded to the back side of the surface portion 21 along this fold 41. In addition, perforations 46 are formed along the fold 41 of the bag body 11.

[0027] In the bag body 11, a fold 42 is formed at the boundary between the surface portion 21 and the side portion 23. The side portion 23 is folded to the back side of the surface portion 21 along this fold 42. In addition, perforations 47 are formed along the fold 42 of the bag body 11.

[0028] In the bag body 11, a fold 43 is formed between the surface portion 21 and the lower flap portion 24. The lower flap portion 24 is folded along this fold 43 so that it overlaps with the back portion 26. In addition, perforations 48 are formed along the fold 43 of the bag body 11.

[0029] In the bag body 11, a fold 44 is formed between the surface portion 21 and the upper flap portion 25. The upper flap portion 25 can be folded along this fold 44 so that it overlaps with the back portion 26 (see Figure 3). In addition, perforations 49 are formed along the fold 44 of the bag body 11.

[0030] Each of the folds 41-43 corresponds to the "fold" described in claim 1. Also, each of the perforations 46-48 corresponds to the "perforation" described in claim 1. Furthermore, each of the perforations 46-48 can also be called the "first perforation."

[0031] Next, the protruding piece 12 will be explained using Figure 3 in addition to Figures 1(b) and 2. Figure 3 is a rear view showing the bag body 11 with the protruding piece 12 detached and the bag body 11 sealed with the sealing seal 53.

[0032] As shown in Figures 1(b) and 2, the protruding piece 12 is provided so as to protrude from the bonded portion 27 of each side portion 22, 23 of the bag body 11 in the left-right direction. Specifically, the protruding piece 12 protrudes from the side portion 23 that is located on the outside of the bonded portion 27. The protruding piece 12 is positioned so as to protrude from the side edge of the side portion 23 and overlap the side portion 22. In this case, the protruding piece 12 is positioned so as to cover a part of the upper side of the writing area 37. Furthermore, the protruding piece 12 and the side portion 23 are positioned so that their surfaces are flush with each other.

[0033] The protruding piece 12 is shaped like a long rectangle in the vertical direction. The upper end of the protruding piece 12 is located at approximately the same position in the vertical direction as the upper end of the side portion 23 (back portion 26). The lower end of the protruding piece 12 is located above the lower end of the side portion 23 (back portion 26). In this case, the lower end of the protruding piece 12 is located above the upper end of the lower flap portion 24, and more specifically, it is located at a position above and separated from the upper end of the lower flap portion 24.

[0034] The protruding piece 12 is positioned so that the side edge of the protruding side that extends from the side portion 23 does not extend outward in the left-right direction from the bag body 11. In this case, the side edge of the protruding piece 12 is located inward in the left-right direction from the side edge of the bag body 11 (more specifically, the side edge along the fold 41). Also in this case, the entire protruding piece 12 is positioned overlapping the side portion 22.

[0035] A perforation 51 is formed along the boundary between the protruding piece 12 and the side portion 23. This makes it possible to separate the protruding piece 12 from the side portion 23 along the perforation 51, as shown in Figure 3. The perforation 51 corresponds to the "perforation" described in claim 2. The perforation 51 can also be called the "second perforation".

[0036] Multiple (four in this embodiment) sealing seals 53 are provided on the protruding piece 12 in a detachable manner. Each sealing seal 53 consists of a part of the adhesive sheet 15. The adhesive sheet 15 has a cut 55 (a so-called half-cut) formed around each sealing seal 53. Each sealing seal 53 can be separated and peeled off from the rest of the adhesive sheet 15 by its cut 55.

[0037] The sealing sticker 53 is a sticker used to seal the bag body 11 and has a vertically elongated shape. As shown in Figure 3, the sealing sticker 53 is attached to the upper flap portion 25 of the bag body 11 after the protruding piece 12 is separated from the bag body 11 along the perforation 51. Specifically, the sealing sticker 53 is attached across the upper flap portion 25 and the back portion 26, with the upper flap portion 25 folded along the fold 44 so that it overlaps the back portion 26. In this embodiment, messages such as "Congratulations" and "Pocket Money" are displayed on the surface of the sealing sticker 53. Therefore, the sealing sticker 53 also serves as a message sticker.

[0038] The sealing seal 53 is usually affixed to the center of the bag body 11 in the left-right direction (see Figure 3). When the sealing seal 53 is affixed in this manner, each seal 31b provided on the back surface 26 of the bag body 11 is positioned so as not to overlap with the sealing seal 53. Specifically, each seal 31b includes multiple seals 31b that are located on both the left and right sides of the sealing seal 53 when it is affixed as described above. The left-right spacing L of these seals 31b is greater than the width W of the sealing seal 53X, which has the largest width (left-right length) among the sealing seals 53. This ensures that the sealing seal 53 does not overlap with each seal 31b, regardless of which of the different widths of sealing seals 53 is affixed.

[0039] Next, the manufacturing method of the sealable envelope 10 will be explained based on Figures 4 and 5. Figure 4 is a diagram illustrating the manufacturing procedure of the sealable envelope 10. Figure 5 is a rear view (a) illustrating the first step of the bag-making process, and (b) is a rear view illustrating the second step of the bag-making process.

[0040] As shown in Figure 4, when manufacturing the sealed envelope 10, the first step is to perform a printing process S1 using a printing device. In the printing process S1, the adhesive paper is pulled out from a roll on which it is wound, and the design of the sealed envelope 10 (the design of the seal 31 and the non-sealed area 35, the message on the sealing seal 53, etc.) is printed on the surface of the adhesive paper (more specifically, the surface of the adhesive sheet).

[0041] Next, die-cutting process S2 is performed using a die-cutting device that has a die such as a Thomson die. In die-cutting process S2, first, the tack paper printed in printing process S1 is half-cut (that is, cuts 33, 55 are made in the adhesive sheet of the tack paper) to form the seal 31 and the sealing seal 53. Subsequently, the tack paper is die-cut into the unfolded shape of the seal-attached envelope 10. During this process, perforations 46-49, 51 are formed on the tack paper at the same time as die-cutting. As a result, a sheet body S (see Figure 2) having the unfolded shape of the seal-attached envelope 10 is formed.

[0042] Next, the bag-making process S3 is performed using a bag-making device. In the bag-making process S3, folds 41-44 (crease lines) are made on the sheet body S, and the sheet body S is folded along these folds 41-44 to produce a sealed envelope 10.

[0043] Specifically, in the bag-making process S3, first, as shown in Figure 5(a), a first step S4 is performed in which each side portion 22, 23 of the sheet body S is folded and glued to the back side of the surface portion 21. In the first step S4, glue is applied to the back side of the side edge of the side portion 23, and this glued portion is then glued to the surface of the side edge of the side portion 22. This forms a glued portion 27 where the side edges of each side portion 22, 23 are glued together. Note that in Figure 5(a), the glued portion 27 is shown with hatching to make it easier to see (the same applies to Figure 5(b)).

[0044] Next, as shown in Figure 5(b), a second step S5 is performed in which each flap portion 24, 25 is folded so that it overlaps each side portion 22, 23 (in other words, the back portion 26). In the second step S5, each flap portion 24, 25 is folded while the bonded portion 27, which was bonded in the first step S4, is pressed down with a roller 57. In this case, for the lower flap portion 24, glue is applied to its back surface before folding and bonding it to each side portion 22, 23. Also, for the upper flap portion 25, it is unfolded again after being folded.

[0045] The roller 57 that presses down on the bonded portion 27 is positioned with its axial direction aligned with the direction in which the bonded portion 27 extends (up and down). The axial length of the roller 57 is slightly shorter than the distance between each flap portion 24, 25 when they are folded. This allows the roller 57 to press down on a wide area of ​​the bonded portion 27 in the vertical direction. For convenience, the roller 57 is shown with dot hatching in Figure 5(b).

[0046] The manufacturing of the sealed envelope 10 is completed through the above steps.

[0047] As described in detail above, the configuration of this embodiment provides the following excellent effects.

[0048] • Perforations 46-48 are formed along the folds 41-43 of the bag body 11. In this case, it is easier to fold the bag body 11 along the folds 41-43. Therefore, it is possible to firmly fold the bag body 11, which is relatively thick due to being formed from the tack paper 13.

[0049] Furthermore, the perforations 46-48 are formed along the folds 41-43 of the bag body 11, allowing the adhesive sheet 15 and the release paper 14 to interlock at the folds 41-43. This enhances the sense of unity between the adhesive sheet 15 and the release paper 14 at the folds 41-43. As a result, it is possible to suppress the lifting of the adhesive sheet 15 relative to the release paper 14 at the folds 41-43.

[0050] Therefore, based on the above, it is possible to improve the quality of the bag body 11.

[0051] Since a sealing seal 53 is provided on the protruding piece 12 that extends from the bag body 11, there is no need to prepare a sealing seal separately from the sealed envelope 10. Therefore, this configuration is advantageous in terms of manufacturing and management. In addition, since a perforation 51 is formed at the boundary between the protruding piece 12 and the bag body 11, the protruding piece 12 can be separated from the bag body 11 along the perforation 51 when using the bag body 11.

[0052] In the second step S5 of the bag-making process, the flap portions 24 and 25 are folded so that they overlap the side portions 22 and 23 while the roller 57 holds down the bonded portions 27 of the vertically extending side portions 22 and 23. In this configuration, if protruding pieces are provided that protrude vertically from the flap portions 24 and 25, there is a risk that the protruding pieces will interfere with the roller 57 when the flap portions 24 and 25 are folded. Therefore, in order to avoid such interference, it is necessary to shorten the length of the roller 57 (more specifically, the length of the roller 57 in the direction in which the bonded portions 27 extend). However, if the length of the roller 57 is shortened, the range in which the roller 57 can hold down the bonded portions 27 of the side portions 22 and 23 becomes narrower, making it easier for peeling to occur at the bonded portions 27.

[0053] Therefore, in the above embodiment, in view of these points, the protruding piece 12 is provided so as to protrude from the bonding portion 27 of each side portion 22, 23 in the left-right direction. In this case, interference between the protruding piece 12 and the roller 57 when the flap portions 24, 25 are folded can be avoided. For this reason, the length of the roller 57 can be increased so that a wider area of ​​the bonding portion 27 can be pressed by the roller 57. As a result, in a configuration that includes the protruding piece 12, peeling of the bonding portion 27 can be made less likely.

[0054] When inserting or removing items (such as money) from the bag body 11, the bag body 11 expands, causing the folds 41-43 to widen. In a configuration where the seal 31 is positioned close to the folds 41-43 of the bag body 11 (for example, a configuration where the seal 31 is positioned 1 mm away from the folds 41-43), it is conceivable that the seal 31 may unintentionally peel off when the folds 41-43 widen. In contrast, in the above embodiment, all of the multiple seals 31 provided on the bag body 11 are positioned 3 mm or more away from the folds 41-43. Therefore, the above-mentioned situation where the seal 31 peels off unintentionally is less likely to occur.

[0055] Since multiple seals 31 are provided on both the front surface 21 and the back surface 26 of the bag body 11, after use as a bag, the seals 31 can be peeled off and the child can play with it many more times.

[0056] Furthermore, in this configuration, each seal 31b provided on the back surface 26 is positioned so as not to overlap with the sealing seal 53 when the sealing seal 53 is attached across the upper flap 25 and the back surface 26 in the center of the bag body 11 in the left-right direction. This prevents a situation where the seal 31 cannot be removed after the bag body 11 is sealed with the sealing seal 53.

[0057] The upper end of the protruding piece 12 is located at approximately the same position vertically as the upper end of the side portion 23 (and consequently the back portion 26). In this configuration, if the upper flap portion 25 is folded towards the back portion 26 to seal the bag body 11 before the protruding piece 12 is detached from the bag body 11, the upper part of the protruding piece 12 will be covered by the upper flap portion 25. Therefore, it becomes possible to realize that the protruding piece 12 has been forgotten to be detached. This prevents sealing the bag body 11 with the protruding piece 12 still attached.

[0058] Furthermore, in order to obtain the above effect, the upper end of the protruding piece 12 does not necessarily need to be in the same position vertically as the upper end of the side portion 23. The above effect can be obtained as long as the protruding piece 12 is positioned such that a part of it is covered by the upper flap portion 25 when the upper flap portion 25 is folded towards the back portion 26 along the fold line 44.

[0059] The protruding piece 12 is positioned so that the side edge of the protruding side that extends from the side portion 23 does not extend outward in the left-right direction beyond the bag body 11. In this case, it is possible to prevent the inconvenience of accidentally detaching the protruding piece 12 by catching one's hand on its side edge.

[0060] The bag body 11 is provided with a writing area 37 on the surface of the non-sealed area 35 for writing information such as text. For example, if the writing area is located on the surface of the seal 31, important information written in the writing area will be lost if the seal 31 is accidentally peeled off. However, with the above configuration, where the writing area 37 is located in the non-sealed area 35, it is possible to avoid such a situation.

[0061] The protruding piece 12 is positioned so as to cover a portion of the entry field 37. In this case, since the remaining portion of the entry field 37 is not covered by the protruding piece 12, the presence of the entry field 37 can be noticed, thereby preventing the user from forgetting to fill in the entry field 37. In addition, because the entry field 37 is only partially covered by the protruding piece 12, the user may forget to detach the protruding piece 12.

[0062] Figures 6(a) to (c) show more specific examples of the sealable envelopes of the present invention.

[0063] The present invention is not limited to the embodiments described above, and may be implemented, for example, as follows.

[0064] In the above embodiment, the protruding piece 12 is provided so as to protrude from the bonded portion 27 of each side portion 22, 23, but the protruding piece 12 may also be provided so as to protrude from the lower flap portion 24 or the upper flap portion 25. However, in order to press a wide area in the vertical direction of the bonded portion 27 with the roller 57 during the second step S5, it is desirable to provide the protruding piece 12 so as to protrude from the bonded portion 27.

[0065] Alternatively, the sealed envelope 10 may be configured without a protruding piece 12. In this case, the sealing sticker can be prepared separately from the sealed envelope 10.

[0066] In the above embodiment, the bag body 11 was glued in the middle (center glued), but the bag body 11 may be glued in other ways, such as side glued, side glued, or diamond glued.

[0067] In the above embodiment, the sealable bag of the present invention was embodied as a sealable money envelope, but the present invention does not necessarily have to be applied to money envelopes, and may be applied to other types of bags such as congratulatory envelopes or envelopes. [Explanation of symbols]

[0068] 10...Sealed envelope as a sealed bag body, 11...Bag body, 12...Protruding piece, 13...Tack paper, 14...Release paper, 15...Adhesive sheet, 21...Front part, 22,23...Side parts, 24,25...Flap part, 26...Back part, 27...Bonding part, 31...Seal, 41~43...Fold lines, 46~48...Perforations, 51...Perforations, 53...Sealing seal.

Claims

1. The bag body is formed in a bag shape using tack paper, on which an adhesive sheet is peelably bonded to a release paper. The bag body is formed into a bag shape by folding along the folds so that the adhesive sheet is on the outside. The bag body is a sealed bag body provided with a part of the adhesive sheet that is separated from the other part and is peelable, A bag body with a seal, wherein perforations are formed along the fold of the bag body.

2. The bag body is provided with a protruding piece that is formed integrally with the bag body by the tack paper, Perforations are formed at the boundary between the protruding piece and the bag body. The sealed bag according to claim 1, wherein the protruding piece is provided with a sealing seal that is part of the adhesive sheet and separate from the other part to be peelable.

3. The bag body is, The surface portion that forms the surface of the bag body, A pair of side portions are connected to the left and right sides of the aforementioned surface portion, and are folded and glued together to the back side of the aforementioned surface portion, It has a pair of flap portions that are connected to the upper and lower sides of the surface portion and are folded so as to overlap the pair of side portions, The sealed bag body according to claim 2, wherein the protruding piece protrudes in the left-right direction from the bonded portion where the pair of side portions are bonded together.

4. The pair of side portions form a back surface that forms the back surface of the bag body. Multiple seals are provided on the front surface and the back surface, The sealed bag body according to claim 3, wherein each of the seals provided on the back surface is positioned so as not to overlap with the sealing seal when the sealing seal is affixed to the upper flap portion and the back surface in the center of the bag body in the left-right direction.

5. Multiple seals are provided on the bag body. The sealed bag according to any one of claims 1 to 4, wherein each of the seals is positioned at least 3 mm away from the fold.

6. A manufacturing method for producing a sealed bag according to claim 3 or 4, The first step is to fold the pair of side portions and attach them to the back side of the surface portion, A method for manufacturing a sealed bag, comprising: a second step of folding the flap portion so that it overlaps the pair of side portions, which have been bonded together in the first step, while pressing down on the bonded portion with a roller.

Images