JPH0479882B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention has a bag main body portion that is wide in the horizontal direction, a mouth that projects vertically in the center of the bag body portion, and a recessed line in the mouth. The present invention relates to a method for manufacturing a bag with a so-called zipper, which has an inverted T-shaped appearance and has a fastener attached thereto.

[Prior Art] An automatic bag making method for bags with articulating devices attached inside the mouth involves directly forming articulating devices consisting of concave and convex shapes along both edges of a flat film, and then rolling this film along a mandrel. After occluding the articulating tool by bending it into a circle, heat sealing is performed along both edges, and then horizontally sealing is performed by applying a heat seal bar horizontally from both sides with the articulating tool side facing the front side. A method of attaching an articulating tool to the mouth of a bag is known (Japanese Patent Application Laid-Open No. 56-42640).

[Problems with the Prior Art] However, in the bag making method described above, it is possible to manufacture a bag in which the outside of the articulating tool is hermetically sealed. It is not possible to manufacture a bag with a fastener in which a vertically protruding opening is formed in the center of the part and a fitting is attached to the opening.

Furthermore, this known example has the following problems.

a Because the occlusion tool is formed near both edges of the inside of the film that forms the bag body, the film is wide, and since it is formed into a cylindrical shape and then the occlusion tool is engaged with it, this occlusion is The technology is very difficult, and for practical purposes the speed must be quite slow. For this reason, productivity does not increase.

b. At the mouth of the bag, the outside of the articulator is heat-sealed to seal the mouth of the bag, so the heat-sealed portion is located at the end of the mouth of the bag, giving the bag a poor appearance.

c If the heat-sealed portion is located at the edge (outside) of the mouth of the bag, the number of sides on which pinholes will occur due to external force increases accordingly.

An object of the present invention is to provide a method for manufacturing a bag with a fastener, in which the main body portion of the bag is wide in the horizontal direction, a mouth is formed in the vertical direction from the center, and a fastener is attached to the mouth.

[Means to solve the problem] The configuration of the present invention is as follows.

A step of folding a zipper tape in which articulating tools consisting of concave and convex shapes are formed in parallel on one side of a plastic film in half and interlocking the concave and convex shapes during feeding, and a bag tape made of a flat plastic film. A step of winding it around a cylindrical mandrel and forming it into a cylindrical shape by pulling both longitudinal edges together so that the two edges of the zipper tape are folded in half and the bag tape formed into a cylindrical shape. The edges are made to face each other with the articulating tool facing inside the bag tape, and in the zipper tape, both edges ahead of the articulating tool and both edges of the bag tape are overlapped with each other, and the overlapping edges are Heat-sealing both edges of the bag tape and both edges of the zipper tape by applying a heat seal bar to the outside, and placing the cylindrical body formed by gluing the bag tape of the zipper tape under a mandrel, There is a process of forming a bag by applying a heat seal bar horizontally from the front and back with the zipper tape in front and sealing it in a direction across the cylindrical body. After putting the contents into the bag via a mandrel, the bag is sealed. A method for producing a bag with a fastener, which comprises the following steps: sealing the bag with a mouth seal, and cutting off the bag horizontally in the middle of the mouth seal with a cutting blade.

[Function] The zipper tape is unrolled from the roll in a flat state, and midway through, it is folded inward and engaged with the articulating tool. On the other hand, the bag tape is also unrolled from the roll, formed into a cylindrical shape by a mandrel, and pushed out with both edges drawn together in a state of folding hands. The zipper tape folded in half is placed so as to face both edges of the bag tape in the folded state, and both edges are inserted inside the folded palms. When the inside of the zipper tape and the bag tape are made of heat-sealable polyethylene, for example, a heat insulator such as Teflon tape is placed between both edges of the zipper tape, and in this state, both edges of the bag tape are A heat seal bar is fitted on the outside of the The sealing tape and the bag tape are each heat-sealed by the heat of the heat seal bar, and the zipper tape is attached to the bag tape. Next, at a position away from the lower end of the mandrel, a heat seal bar is applied horizontally from the front and back with the zipper tape on the front side to seal the bottom and form a bag. Note that the term "bottom seal" used here is for convenience of explanation, and refers to the side seal of the bag. After the bottom is sealed, the contents are poured into the mandrel from above,
After one bag has been moved, the mouth seal is performed again, and at the same time the mouth of the bag is sealed, the middle of the seal is cut off, and the bag with its contents sealed is dropped and taken out as one bag. Bag making, filling and sealing are automatically performed by the above sequence.

[Example] FIG. 1 shows an embodiment of the present invention.

The number 1 is a zipper tape made by integrally forming protrusions 2 and grooves 3 as an articulating tool on the same side of a tape made of plastic film.This zipper tape 1 is wound into a roll, and the delivery On the way, it is folded in half at the center by guide rollers and pinch rollers, and the convex strips 2 and concave strips 3 are engaged with each other.

On the other hand, the bag body film 4, which is a plastic film or a plastic film laminated with aluminum foil or paper, is curved at the cylindrical mandrel 5 and has both edges 4'.
are protruded in the shape of palms together.

Both edges 1' of the zipper tape 1 formed in two folds are attached to the bag body film 4 which is aligned in the shape of palms together.
The bag film 4 is inserted in such a way that it faces both edges 4' of the bag film 4 and slightly overlaps both edges 4' of the bag film 4. Here, it is compressed by heat seal bars 6, 6a from both sides to seal the bag film 4. Both edges 4' of the zipper tape 1 and both edges 1' of the zipper tape 1 are heat-sealed. In addition,
During this heat sealing, a heat insulating member 7 such as Teflon is inserted between both edges of the zipper tape 1 to prevent the zipper tapes 1 from being heat sealed together.

By heat-sealing the zipper tape 1 as described above, the bag film 4 is formed into a cylindrical body 9 and advances, and when it stops, the horizontal heat-seal bar 8, It is heat sealed by 8a. During this heat-sealing, since they escape from the heat insulating member 7, the zipper tape 1 and the inner heat-sealing member, such as the polyethylene layer, of the bag film 4 are fused together to form a bag. The contents are put into this bag via the mandrel 5. Then, when the bag moves one bag and stops, the horizontal heat seal bars 8 and 8a operate from the front and rear directions again with the zipper tape 1 in front, and the input port side is heat sealed. As a result, the contents that were previously introduced are completely sealed inside the bag. In the next step, the sealed bag is cut in the middle of the heat seal on the input port side. In addition, heat seal bars 6, 6a, horizontal heat seal bars 8, 8
a. The cutters operate synchronously, and during this time the zipper tape 1, bag film 4, and bag are stopped.

The shaded area shown in FIG. 2 indicates the heat sealing position in the cylindrical body 9, and the horizontal heat sealing bars 8, 8a come into contact with the shaded area. In Fig. 2, the heat-sealed state has an inverted T-shape consisting of left and right horizontal wings (main body part) a and a neck (mouth) b vertically protruding from the center, and the articulating tool is the second
As shown in FIG. 3, it is installed in the neck b.

Figure 3 shows a portion of the lateral heat seals 8, 8a whose positions have been changed by 90° from the above embodiment, that is, the first
The figure shows the form of a bag formed when the zipper tape 1 side is placed in front and lateral heat seal bars 8', 8a' are applied from the left and right sides of the zipper tape 1 side to sandwich and heat seal the cylindrical body 9. In this bag, the hatched parts in Fig. 31 are horizontal heat seal bars 8' and 8.
A' is heat-sealed to form a bag as shown in FIG. 32, and the cross section of the opening portion is as shown in FIG. 3.

The bag made in this way is suitable for a packaging form that can be kept stable, for example, with the opening facing upward, as in the one in Figure 2, and the bag in Figure 3 is suitable for a packaging form that does not require it to be placed particularly stably. It is suitable for packaging in relatively large quantities.

Both edges of the zipper tape 1 are inserted into the inside of the bag film 4 so as to face both edges 4' and are heat sealed.If the material is heat sealable, both edges 1 of the zipper tape 1 ' may be placed outside both edges 4' of the bag film 4 and heat-sealed.

[Effects of the present invention] As described above, the present invention brings together both edges of the bag body film in the shape of palms together, and then makes the two edges of the zipper tape folded in half face each other so that the two edges slightly overlap each other. By heat-sealing the parts to form a cylindrical body, and heat-sealing this in a straight line from front to back in a right angle direction with the zipper tape in front, the bag body part is wide in the horizontal direction, and from this center An inverted T-shaped bag in which a mouth is formed to protrude in the vertical direction and an articulating tool is attached to the inside of the mouth can be efficiently and automatically filled. In addition, since the zipper tape is folded in half, this folded part seals the mouth and there is no need to seal the outside of the occlusal area each time, which improves the appearance and reduces the incidence of pinholes because there is no seal part. It has a decreasing effect.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of the manufacturing method of a bag with a fastener according to the present invention, Figure 2 1, 2, and 3 are explanatory diagrams of a bag made by the manufacturing method shown in Figure 1, and Figure 3 is the same as Figure 1. FIG. 2 is an explanatory diagram of a bag other than the bag shown in FIG. 2 made by the manufacturing method shown. 1... Zipper tape, 2... Convex stripes, 3... Concave stripes, 4... Bag body film, 5... Mandrel,
6, 6'...Heat seal bar, 7...Insulating member,
8, 8a, 8', 8a'...Horizontal heat seal bar,
9... Cylindrical body.

Claims (1)

[Scope of Claims] 1. A step of folding a zipper tape in which articulating tools consisting of a concave shape and a convex shape are formed in parallel on one side of a plastic film in half and interlocking the concave shape and the convex shape while feeding the tape, and a flat plastic film. Wrapping the bag tape made of film around a cylindrical mandrel and forming it into a cylindrical shape by pulling both longitudinal edges together so that the palms are pressed together, and forming the bag tape into a cylindrical shape with both edges of the zipper tape folded in half. The two edges of the bag tape are placed facing each other with the articulating tool facing inside the bag tape, and in the case of a zipper tape, the two edges of the bag tape beyond the articulating tool are overlapped with each other. a step of heat-sealing both edges of the bag tape and both edges of the zipper tape by applying a heat seal bar to the outside of the overlapping edges; and a cylindrical body formed by adhering the zipper tape and the bag tape. Below the mandrel, a heat seal bar is applied horizontally from the front and back with the zipper tape in front to form a bag by sealing the bottom in the direction across the cylinder, and the contents are passed through the mandrel into the bag. A method for manufacturing a bag with a fastener, which comprises the following steps: after placing the bag in the bag, the bag is sealed and sealed, and the middle of the bag is cut horizontally with a cutting blade to cut off one bag.