JP2005041515A - Packaging bag and manufacturing method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag, which is easy to unseal and on which an unsealing tape is attached easily without using a separate machine even when the packaging bag is manufactured using a rotary bag-making machine. <P>SOLUTION: The unsealing tape 11 for unsealing the packaging bag 1 is attached on the inner surface of the packaging bag 1 in such a way that the tape 11 extends straight from one edge of a lid plate 7 to one edge of a bottom plate 8a connected a front plate 2 via the front plate 2 of a packaging bag body 4 in a direction perpendicular to the peripheral direction of an opening 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging bag and a manufacturing method of the packaging bag, and more particularly to a packaging bag suitable for opening and a manufacturing method of the packaging bag.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, packaging bags such as flat bags and square-bottom bags that contain the above-mentioned items in order to mail or deliver various items are known. Such packaging bags are not only made of paper but also made of a material processed into a film for improving durability.
[0003]
About the packaging bag, when opening the packaging bag whose opening is sealed, the packaging bag made of paper can be easily opened by tearing it by hand, etc., but from a film processed material or thick paper It is difficult to break the packaging bag by hand. For this reason, when opening the packaging bag made of the film-processed material or the like, it is necessary to use a tool such as scissors or a cutter, and it takes time to open the packaging bag.
[0004]
Therefore, in recent years, a packaging bag is considered in which an opening tape is provided in the vicinity of the opening so as to be parallel to the circumferential direction of the opening.
[0005]
According to such a packaging bag with an opening tape, one end of the opening tape is picked and pulled toward the other end of the opening tape, and the vicinity of the opening of the packaging bag is along the opening tape. By tearing it, the packaging bag can be easily opened.
[0006]
[Problems to be solved by the invention]
However, when the opening tape is provided in the vicinity of the opening in the packaging bag, when sealing the opening of the packaging bag, for example, the location where the opening tape is provided is on the inside. If the opening is sealed by bending the opening of the packaging bag, the packaging bag cannot be opened using the opening tape. For this reason, the packaging bag whose opening has been sealed as described above must be opened using a tool, which is time-consuming.
[0007]
Further, the packaging bag is formed by bending a raw fabric to form a cylindrical body, cutting the cylindrical body into a predetermined length to form a green bag, folding the lower end portion of the green bag, Many are manufactured by so-called rotary bag making machines. However, when producing a packaging bag by this rotary bag making machine, in order to provide the opening tape so as to be parallel to the circumferential direction of the opening, after the packaging bag is completed or in the previous step, The packaging bag had to be provided with an opening tape using a different machine. For this reason, the manufacturing process of the packaging bag increased, and it took time and labor to manufacture the packaging bag. As a result, the manufacturing cost of the packaging bag also increased.
[0008]
The present invention has been made in view of these points, can be easily opened, and can be easily opened without using a different machine, even when a packaging bag is manufactured using a rotary bag making machine. It aims at providing the manufacturing method of the packaging bag which can provide a tape, and a packaging bag.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the packaging bag according to the invention described in claim 1 is characterized by a cylindrical packaging bag body having an opening and a bottom plate connected to the bottom edge of the packaging bag body. In the packaging bag having the bottom portion, the opening means for unsealing the packaging bag extends from the opening portion side to the one end edge of the bottom plate through the packaging bag body in the circumferential direction of the opening portion. It is in a point provided in a straight line in the direction intersecting with.
[0010]
According to the packaging bag of the first aspect of the present invention, since the opening means of the packaging bag is provided so as not to be parallel to the circumferential direction of the opening in the packaging bag, the opening of the packaging bag Even if it is sealed in such a manner that the vicinity of is wrapped inside, the packaging bag can be easily opened by pulling the opening means from the bottom plate side.
[0011]
In the case of manufacturing such a packaging bag, after the opening means is provided on the original fabric, the other manufacturing process of the packaging bag can be performed continuously with the step of providing the opening means. Even with a bag making machine, it is possible to easily provide an opening means without using a different machine.
[0012]
In addition, the packaging bag according to the invention described in claim 2 has a lid connected to the top edge of the packaging bag body, and the unsealing means extends from one edge of the lid. It exists in the point provided so that the one end edge of the said bottom plate might be reached via a packaging bag main body.
[0013]
According to the packaging bag of the invention described in claim 2, when the opening is sealed so that the end on the cover plate side of the opening means is exposed, the end on the cover plate side and the bottom plate By pulling the opening means from both end portions on the side, the packaging bag can be easily broken in a direction intersecting the circumferential direction of the opening portion.
[0014]
Furthermore, the manufacturing method of the packaging bag according to the invention of claim 3 is characterized in that opening means are continuously provided in a straight line in the length direction of the original fabric, and the cylindrical body is formed by bending the original fabric. Forming a green bag by cutting the cylindrical body into a predetermined length, forming a lid on the top side end of the green bag and providing the opening means, The bottom plate forming the bottom is formed at the bottom side end of the green bag at the position where the opening means is provided.
[0015]
According to the method for manufacturing a packaging bag according to the third aspect of the present invention, after the opening means is provided on the original fabric, the other manufacturing process of the packaging bag can be performed continuously with the step of providing the opening means. Therefore, even with a so-called rotary bag making machine, the opening means can be easily provided on the packaging bag without using a different machine.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a packaging bag according to the present invention will be described with reference to FIGS.
[0017]
1 and 2 are perspective views showing a packaging bag according to the present embodiment.
[0018]
As shown in FIGS. 1 and 2, the present packaging bag 1 has a cylindrical packaging bag body 4 having a front plate 2 and a rear plate 3 made of film-processed material or paper, and the packaging bag body. 4, a gusset 5 is formed between the front plate 2 and the rear plate 3 by being folded in a V shape. A square lid plate 7 is connected to the top side edge of the front plate 2, and the front plate 2, the rear plate 3 and the bottom side edge of the packaging bag body 4 are connected to the front plate 2. A square base 9 is connected as a bottom formed by bending a bottom plate 8 connected to the bottom edge of the gusset 5.
[0019]
The packaging bag 1 is located on the inner surface of the packaging bag 1 from one end edge of the cover plate 7 to one end edge of the bottom plate 8a connected to the front plate 2 via the front plate 2. As an opening means, an opening tape 11 made of synthetic resin or the like is provided in a direction intersecting the circumferential direction of the opening 12 of the packaging bag 1 (a direction orthogonal in the present embodiment).
[0020]
In the vicinity of the cover plate end portion 11a of the opening tape 11 in the cover plate 7 and in the vicinity of the bottom plate end portion 11b of the opening tape 11 in the bottom plate 8a, respectively, along both sides of the opening tape 11 respectively. A cut 14 is formed. These cuts 14 allow the lid plate end 11a and the bottom plate end 11b of the opening tape 11 to be easily picked.
[0021]
And the said packaging bag 1 pulls the said opening tape 11 to the other end part side from the cover plate edge part 11a and / or the bottom plate edge part 11b, and the front surface plate 2 of the said packaging bag 1 to this opening tape 11 By breaking along, the packaging bag 1 can be opened and opened in a direction perpendicular to the circumferential direction of the opening 12.
[0022]
Further, on the inner surface of the lid plate 7, a sealing sheet 18 composed of an adhesive sheet 16 and a release sheet 17 covering one surface of the adhesive sheet 16 is provided, and the other surface of the adhesive sheet 16 is the lid plate 7. It is stuck so as to touch the inner surface. The sealing sheet 18 peels the release sheet 17 from the pressure-sensitive adhesive sheet 16, and sticks the pressure-sensitive adhesive sheet 16 to the rear surface plate 3 or the like of the packaging bag body 4 to open the opening 12 of the packaging bag 1. Can be sealed.
[0023]
Next, the manufacturing method of this packaging bag is demonstrated.
[0024]
FIG. 3 is a conceptual diagram showing from the attachment of the opening tape 11 to the formation of the cylindrical body 25 in the manufacturing process of the packaging bag 1, and FIG. 4 shows the completion of the packaging bag 1 from the formation of the raw bag 29. It is a conceptual diagram which shows up.
[0025]
First, as shown in FIG. 3, the raw fabric 20 that is a raw material of the packaging bag 1 is fed out, and the lid 20, the front plate 2, and the bottom plate 8 a connected to the front plate 2 in the raw fabric 20. The opening tape 11 is stuck in a straight line. At this time, the opening tape 11 is continuously attached to the cover plate 7, the front plate 2 and the bottom plate 8a of the packaging bag 1 which is formed next adjacently in the raw fabric 20. .
[0026]
Subsequently, the sealing sheet 18 is stuck to the position corresponding to the cover plate 7 in the original fabric 20 from the upper side of the opening tape 11.
[0027]
Next, the notch 14 is formed by bringing the cutter 21 into contact with the side edge of the opening tape 11 at a position corresponding to one end edge portion of the cover plate 7 and the bottom plate 8a in the original fabric 20. To do. At this time, the cutter 21 is continuously brought into contact with the bottom plate 8a and a position corresponding to the cover plate 7 of the packaging bag 1 formed next to the bottom plate 8a. The bottom plate 8a and the notch 14 of the lid plate 7 are simultaneously formed by the contact operation.
[0028]
Further, an adhesive material 23 is applied to one side edge of the original fabric 20, and gussets 5 are respectively formed at boundaries between portions of the original fabric 20 that become the front plate 2 and the rear plate 3. A cylindrical body 25 having a gusset 5 is formed by bonding the side edge and the other side edge with the adhesive 23.
[0029]
Subsequently, the boundary portion of each packaging bag 1 in the cylindrical body 25, that is, one end edge of the bottom plate 8 of one packaging bag 1 and the top of the lid plate 7 and the rear plate 3 of the packaging bag 1 to be formed next. The bottom plate 8, the lid plate 7 and the cut plate 27 are cut by bringing a cutter into contact with a position corresponding to one end edge of the cut plate 27 connected to the side edge. Thereby, as shown in FIG. 4, the green bag 29 which is a prototype of the packaging bag 1 is formed.
[0030]
Then, the bottom plate 8 of the green bag 29 is bent, and one end of the bottom plate 8a connected to the front plate 2 and the bottom plate 8b connected to the rear plate 3 are bonded to form a square bottom 9, and an edge cutter (not shown) is formed. Are cut off on both sides of the lid plate 7 and the cut plate 27 by bringing the lid plate 7 connected to the front plate 2 and the cut plate 27 connected to the rear plate 3 into contact with both sides in the width direction of the packaging bag 1. To do.
[0031]
Thereafter, a half cutter (not shown) is brought into contact with the boundary between the rear plate 3 and the cut plate 27, and only the lid plate 7 is left and the cut plate 27 is cut so that the opening tape 11 is provided. The packaging bag 1 with the lid 7 having the square bottom 9 having 5 is completed.
[0032]
According to the present embodiment, as described above, after attaching the opening tape 11 to the original fabric 20, the other manufacturing process of the packaging bag 1 is performed continuously to the attaching process of the opening tape 11. Can do.
[0033]
Therefore, even when manufacturing the packaging bag 1 provided with the opening tape 11 in a so-called rotary bag making machine, the opening tape 11 can be easily provided without using a different machine. Thereby, the manufacturing cost of the packaging bag 1 can also be reduced.
[0034]
Moreover, since this packaging bag 1 is provided with the tape 11 for opening so that it may be arrange | positioned in the direction orthogonal to the circumferential direction of the opening part 12 in the said packaging bag 1, as shown in FIG. The opening tape 11 is pulled from the bottom plate end portion 11b even when the opening portion 12 is sealed with the gum tape 31 or the like so that the cover plate end portion 11a of the opening tape 11 is wound inside. Thus, the packaging bag 1 can be easily opened. Furthermore, as shown in FIG. 6, when the opening 12 is sealed with the adhesive sheet 16 so that the lid end 11a of the opening tape 11 is exposed, the lid end 11a By pulling the opening tape 11 from both the bottom plate end portion 11b, the front plate 2 of the packaging bag 1 can be easily broken in the direction perpendicular to the circumferential direction of the opening portion 12. Thereby, the said packaging bag 1 can be opened large and the accommodation thing inside the packaging bag 1 can be confirmed easily and rapidly.
[0035]
In addition, this invention is not limited to the said embodiment, A various change is possible as needed.
[0036]
For example, the order of the manufacturing process of the packaging bag 1 according to the present invention is not limited to that of the present embodiment. For example, the sealing tape 11 is formed after the opening tape 11 is attached to the raw fabric 20 and then the sealing bag 11 is sealed. The sheet 18 may be adhered, and various modifications such as forming the square bottom 9 after the cut plate 27 is cut from the rear plate 3 are possible.
[0037]
Further, the unsealing means is not limited to the unsealing tape 11 of the present embodiment, and may be constituted by, for example, two cutting lines.
[0038]
Furthermore, the packaging bag 1 which concerns on this invention is not limited to the packaging bag 1 of the square bottom 9 which has the gusset 5, The packaging bag which has the bottom part comprised by the packaging bag main body 4 provided with the opening part 12, and the bottom plate 8 If it is 1, it can be used for various packaging bags 1 such as a flat bag 33 as shown in FIGS. 7A and 7B or a flat bag 34 having a gusset 5 as shown in FIG.
[0039]
【The invention's effect】
As described above, according to the packaging bag and the manufacturing method of the packaging bag according to the present invention, the opening portion of the packaging bag is sealed so that the end portion on the cover plate side of the opening means is wound inside. However, the packaging bag can be easily opened by pulling the opening means from the end on the bottom plate side.
[0040]
In addition, when the opening is sealed so that the end on the cover plate side of the opening means is exposed, the opening means is pulled from both the end on the cover plate side and the end on the bottom plate side, thereby packaging bag Can be easily broken in a direction perpendicular to the circumferential direction of the opening. Thereby, a packaging bag can be opened largely and the accommodation thing inside a packaging bag can be confirmed easily and rapidly.
[0041]
In addition, after the opening means is provided on the raw fabric, the other manufacturing process of the packaging bag can be performed continuously with the process of providing the opening means, so even with a so-called rotary bag making machine, a different machine can be used. The opening means can be easily provided in the packaging bag.
[Brief description of the drawings]
1 is a perspective view from the back side showing an embodiment of the packaging bag according to the present invention. FIG. 2 is a perspective view from the front side showing the packaging bag of FIG. 1. FIG. FIG. 4 is a conceptual diagram showing the process from sticking of an opening tape to the formation of a cylindrical body in the process. FIG. 6 is a perspective view showing an example when the opening of the packaging bag of FIG. 1 is sealed. FIG. 6 is a perspective view showing another example when the opening of the packaging bag of FIG. 1 is sealed. ) Front view showing another embodiment of the packaging bag according to the present invention (b) Rear view showing the packaging bag of FIG. 7 (a) [Fig. 8] Back side showing another embodiment of the packaging bag according to the present invention Perspective view [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Front surface plate 3 Rear surface plate 4 Packaging bag main body 5 Gusset 7 Lid plate 8a Bottom plate 8b connected to front surface plate Bottom plate 9 connected to rear surface plate Square bottom 11 Opening tape 11a Lid plate edge portion 11b Bottom plate edge portion 12 Opening Part 14 Cut 18 Sheet for sealing

Claims (3)

In a packaging bag having a cylindrical packaging bag body having an opening, and a bottom formed by a bottom plate connected to a bottom side edge of the packaging bag body,
An opening means for opening the packaging bag is provided linearly in a direction intersecting with the circumferential direction of the opening so as to reach the one end edge of the bottom plate from the opening side through the packaging bag body. A packaging bag characterized by that. It has a cover plate connected to the top side edge of the packaging bag body, and the opening means is provided from one end edge of the cover plate to one end edge of the bottom plate through the packaging bag body. The packaging bag according to claim 1. Opening means are continuously provided in a straight line in the length direction of the original fabric, the original fabric is bent to form a cylindrical body, and the cylindrical body is cut into a predetermined length to obtain a green bag. Forming a lid at a position on the top side of the green bag where the opening means is provided, and forming a bottom at a position on the bottom side of the green bag where the opening means is provided. A method for manufacturing a packaging bag, comprising forming a bottom plate to be formed.

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