JPH05270551A - Flat bag with zipper and manufacture thereof - Google Patents

Abstract

PURPOSE:To perform the fitting of a zipper to a bag main body easily and assuredly by a method wherein after forming a bag main body, incisions are put from the ends of the mouth part to the inside along respective folding lines to open the vicinity of the mouth part, and a zipper is fitted on the opened inner surface CONSTITUTION:The title flat bag with zipper 1 is equipped with a cylindrical bag main body 10, which has a confronted pair of flat parts 11, 15, and a zipper 20 which is fitted on one inner surface in the vicinity of the side which becomes a mouth part of the bag. In this case, the bag main body 10 is formed as a hutt-seamed bag, for which a step for the joined surface of the sheet is provided on either one of respective flat surface parts 11 or 15. Also, respective folding lines 12, 14 are formed by connecting surfaces of respective flat surface parts 11, 15. In addition, a fusion seal surface 35 is formed in such a manner that the total end part of the mouth part may be sealed. Then, respective fusion seal surfaces 31, 33 are formed along respective folding lines 12, 14, from the mouth part end to the inside of the zipper 20. By doing this, incisions are put along respective folding lines 12, 14 to open the vicinity of the mouth part, and the zipper 20 is easily fitted on the inner surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat bag with a zipper, and more particularly to a flat bag whose mouth portion can be opened and closed by a zipper for taking out contents, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, among flat bags (containers) having opposed flat surfaces, those for heat-sealing the four sides of the bag (four-side sealed bag) are film materials which are materials for the flat bag. It is possible to process the zipper parts in the same direction as the conveyance direction, and from the viewpoint of improving productivity,
Conventionally, a flat bag with a zipper has been manufactured by this method.
Recently, a device has been devised to attach a zipper to a bag other than a four-sided sealed bag, and a cap bag-like member having a zipper part may be put on a cap in addition to the bag body part of the bag. A container made by a method of applying the same has been proposed.

[0003]

However, in a bag other than the four-sided seal bag, for example, a so-called central joint-sealed bag as shown in FIG. 7, there is a step especially at the central (back) seal 52. Therefore, there is a problem that even if the cap bag-shaped member 60 including the zipper portion 65 is covered, the certainty is poor and it is difficult. In addition, the central joint pouch 50
Has a problem that the flow direction (C) of the film and the flow direction (D) of the zipper member are orthogonal to each other, and the process of attaching the zipper member becomes complicated. The present invention has been made in view of the above circumstances, and an object thereof is to provide a flat bag with a zipper in which a zipper member can be mounted easily and reliably, and a manufacturing method thereof.

[0004]

In order to solve such a problem, the present invention provides a tubular bag main body having a pair of opposed flat surfaces and a bag mouth of the bag main body. A zipper flat bag having a zipper attached to an inner surface near one end on one side, wherein the bag main body has a step provided with a sheet mating surface on either of the pair of flat portions. The continuous surface of the pair of flat portions forms a fold line, and the zipper is formed along the two fold lines from the mouth end portion so as to seal the entire end portion of the mouth portion of the bag body. The fusion-sealing surface is formed so as to seal the incised portion that has been cut open to a position further inward than the fixed position.

Also, a flat bag with a zipper provided with a tubular bag main body having a pair of opposed flat portions and a zipper attached to the inner side surface of the bag main body near one end of the bag main body near the mouth of the bag. A method for manufacturing a bag, which comprises incising a predetermined distance inward from two facing positions of the mouth end of a tubular bag main body, and cutting the end of the cut. Two foldable door-shaped opening surfaces are formed with the connecting straight line as a base line, and the opening surfaces are bent along the base line so that the inner surfaces of the opening surfaces are exposed, and the inner surfaces of the opening surfaces are respectively formed. , Fixing the male member and the female member of the zipper in a mirror image relationship with respect to the base line, and closing the two surfaces so as to fit the male member and the female member of the zipper, After that, melt the vicinity of the notch and the upper end. And it was configured to produce in close contact seal the top of the vessel.

[0006]

According to the present invention, the method generally used is
A bag body is formed, a cut is made inward from the mouth end of the bag body along two folding lines, the bag body is opened near the mouth, and a zipper is attached to the opened inner surface. Therefore, the zipper member can be easily and surely attached.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A flat bag 1 with a zipper according to the present invention comprises a tubular bag body 10 having a pair of flat portions 11 and 15 facing each other as shown in FIG. A zipper 20 is provided on the inner surface near one end on the side that becomes the mouth of the bag.
The zipper 20 is for freely opening and closing the mouth of the flat bag. Before the zipper is fixed, the tubular bag body portion 10 is basically formed by adhering the end faces of one sheet to each other in a ply-sealed manner, so that a matching step 37 is formed at the rear portion of the bag. ing.

Folding lines 11 and 14 are formed on the connecting surfaces of the flat portions 11 and 15 as shown in the figure. A fusion-sealing surface 35 is formed at the mouth of the bag body 10 so as to seal the entire end of the mouth. Further, fusion-sealing surfaces 31, 33 are formed along the two fold lines 12, 14 from the mouth end portion to a position further inward than the inside of the fixing of the zipper 20. This is performed in order to seal the incision that has been opened as will be described later.

The zipper 20 has a strip shape as shown in FIG. 6, and is formed by a combination of a male member 21 and a female member 25 which are fitted to each other. The male member 21 is the substrate 22.
And a convex band 23 projecting from the central portion of the flat surface on one side of the substrate 22, and the other flat surface 22a of the substrate 22 (the convex band 2).
The side opposite to the forming surface 3) is bonded to the inner surface of the flat bag. On the other hand, the female member 25 includes a substrate 26 and a recessed band 28 formed in the central portion of a flat surface on one side of the substrate 26, and the other flat surface 26a of the substrate 26 (the side opposite to the surface on which the recessed band 28 is formed) is formed. It is designed to be adhered to the other inner surface of the flat bag that faces it.

The flat bag with zipper 1 of the present invention is formed through the following steps. First, as shown in FIG. 1, a tubular bag main body portion 10 having a pair of flat portions 11 and 15 and formed in a palm shape is prepared. As shown in the figure, this product is provided with a seal-matching portion 17 peculiar to sticking a palm together as shown in the figure, and the bag is manufactured by a commonly used method.

Next, as shown in FIG. 2, the bag end portion of the bag main body 10 is located at two opposing positions, that is, a folding surface which is a continuous surface of the flat surface portions 11 and 15 of the bag main body portion 10. From the upper ends of the lines 12 and 14, make incisions 12a and 14a inwardly up to a predetermined distance, respectively.
A straight line connecting the end portions of a and 14a is defined as a base line L, and door-like open surfaces 11a and 15a that can be bent from this portion are divided into two.
Form one.

Next, as shown in FIG. 3, the opening surface 1
1a and 15a are bent along the base line L so that the inner surfaces of the open surfaces 11a and 15a are exposed. At this time, the strip-shaped male member 21 and the female member 25 forming the zipper 20 are conveyed to the positions above the open surfaces 11a and 15a, respectively. In this way, the carrying direction (A) of the bag body 10 and that of the zipper 20 (B) are in the same direction, which facilitates processing and is suitable for mechanization.

Next, as shown in FIG. 4, the male member 21 and the female member 25 of the zipper 20 are connected to the base line L on the open surfaces 11a and 15a which are bent so that the inner surfaces are exposed.
It is fixed so as to have a mirror image relationship with. Usually, they are arranged parallel to each other along the base line L. in this case,
The fixing of the zipper members 21 and 25 is generally performed by a heat sealing method.

Then, as shown in FIG.
In order to fit the male member 21 and the female member 25, the two surfaces 11a and 15a that have been opened are brought into close contact with each other, and then the vicinity 3 of the place where the cut is made.
1, 33 and the upper end portion 35 are fused to tightly seal the upper portion of the container. Thus, the flat bag with a zipper of the present invention is formed, and the contents to be put in the bag are usually filled from the bottom of the flat bag in the open state, and then the bottom is fusion-sealed.

In the present invention, the case where the contents are finally charged from the bottom of the bag has been described as an example. However, the bottom is sealed from the beginning, and the contents are finally charged from the zipper. Alternatively, the zipper may be closed and finally the upper end 35 may be sealed. Further, in the present invention, the zipper 2
It is also possible to mount the male mold member 21 and the female mold member 25 of 0 on the inner surface of the bag main body 10 while the fitting is performed in advance.

[0016]

According to the present invention, the bag main body is once formed by a commonly used method, and the bag main body is formed from the mouth end 2
Since a notch is made inward along one folding line to open the vicinity of the mouth of the bag body and the zipper is attached to the opened inner surface, the zipper member can be easily and surely mounted.

[Brief description of drawings]

FIG. 1 is a schematic view showing one step in the manufacturing process of a flat bag with a zipper according to the present invention.

FIG. 2 is a schematic view showing one step of the manufacturing process of the flat bag with a zipper of the present invention.

FIG. 3 is a schematic view showing one step in the manufacturing process of the flat bag with a zipper of the present invention.

FIG. 4 is a schematic view showing one step in the manufacturing process of the flat bag with a zipper of the present invention.

FIG. 5 is a schematic perspective view showing a step in the manufacturing process of the flat bag with a zipper of the present invention, and is a final one form diagram of the flat bag.

FIG. 6 is a schematic perspective view illustrating the configuration of a zipper.

FIG. 7 is a schematic perspective view of a joint-sealed bag.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Flat bag with zipper 10 ... Bag main body 11, 15 ... Flat part 12, 14 ... Folding line 20 ... Zipper

Claims (2)

[Claims] 1. A flat bag with a zipper, comprising a tubular bag main body having a pair of opposed flat portions, and a zipper attached to an inner side surface of the bag main body near one end of the bag main body on the side that becomes the mouth of the bag. In the bag, the bag body is a palm-sealing bag having a step provided with a sheet mating surface on either of the pair of flat portions, and the continuous surface of the pair of flat portions forms a fold line. , So as to seal the entire end of the mouth of the bag body and from the end of the mouth 2
A flat bag with a zipper, comprising a fusion sealing surface formed so as to seal an incision that has been cut open to a position further inside than the zipper fixing position along one folding line. 2. A flat bag with a zipper, which comprises a tubular bag main body having a pair of opposed flat surfaces, and a zipper attached to an inner surface of the bag main body near one end of the bag main body on the side of the mouth of the bag. A method for manufacturing a bag, which comprises incising a predetermined distance inward from two positions facing each other at the mouth end of a tubular bag body,
Two foldable door-like open faces are formed with a straight line connecting the end portions of the cuts as a base line, and the open faces are bent along the above-mentioned base line so that the inner faces of the open faces are exposed, The male member and the female member of the zipper are fixed to the inner surfaces of the respective members so as to have a mirror image relationship with the base line, and the male member and the female member of the zipper are fitted to each other,
A method for producing a flat bag with a zipper, characterized in that the two surfaces are closed together, and after that, the vicinity of the place where the cut is made and the upper end portion are fused and the upper portion of the container is tightly sealed.