JPS6090139A - Manufacture of triangulr packaging bag, one side thereof has gusset - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a triangular packaging bag having a gusset on one side. The present invention relates to a method of manufacturing a packaging bag having a gusset formed on either side of the bag.

Traditionally, processed rice foods such as rice balls sold at supermarkets and shops have been packaged in triangular bags to match the shape of the rice balls. There is no thickness at the side edges or beveled edges, and the front and back pieces are usually in contact when not in use, and since they are made of synthetic resin film, the area between the two pieces is electrically charged. This has the fatal disadvantage that static electricity is likely to be generated, and therefore, the two pieces are in close contact with each other, making it difficult to open the bag when storing rice balls. In particular, this drawback tends to be more pronounced in packaging bags made of thick film. As a result, the entire opening of the bag cannot be opened sufficiently, especially depending on the machine.
Therefore, it has not been possible to fully carry out the automatic packaging of products by machines, and conventionally the above-mentioned packaging work has been carried out mainly by hand.

Furthermore, since the triangular bag as described above has no thickness at the beveled edge, the bag does not follow the shape of the rice ball when the rice ball is stored therein, and therefore has the disadvantage that it is likely to lose its shape.

Therefore, as a means to eliminate all of the above-mentioned drawbacks, it is possible to form a gusset on the beveled edge of the triangular bag, but due to the special shape of the triangle, it is difficult to form a gusset on such a packaging bag. Due to the manufacturing process, this could not be achieved with conventional packaging bags of this type.

In order to solve all of the above-mentioned problems, the present invention has developed a packaging bag that has a beveled edge, such as the triangular bag for rice balls, rather than a bag that has only straight edges for general product packaging. It was invented with the aim of forming a gusset on the beveled edge of the object, and its purpose was to make the opening process easier and to enable automatic packaging of special-shaped products such as rice balls. To provide a completely new method for producing a triangular packaging bag with a gusset that does not lose its shape when storing products.

The present invention has been made to achieve such an object, and involves folding both side edges of a long sheet jfA made of thermoplastic synthetic resin into a hollow tube to form a gazebo I. By cutting the long sheet material across both side edges and thermally cutting the long film at a predetermined angle to form a triangle with the cut line portion, The present invention provides a manufacturing method for manufacturing a triangular packaging bag having a cut line portion as an opening and a side edge where the gusset is formed and a fusing line portion formed by thermal fusing as side oblique edges.

That is, by forming gussets on both side edges of a long sheet formed into a cylindrical shape, and by thermally cutting and cutting the long sheet material, the oblique edges where the gussets are formed are made into one side. A triangular packaging bag will be manufactured.

Since the triangular packaging bag manufactured in this way has a gusset formed on the beveled edge, the beveled edge is thick and the front and back sides of the bag come into contact with each other. Therefore, there is no possibility that static electricity will be generated between the two pieces.

The present invention provides a long sheet 4 formed into a cylindrical shape as described above.
4. Since the bag is manufactured by a simple process of forming gussets on both side edges, fusing and cutting a long sheet material, the gusset part and the fusing part are attached to both sides of the bag, that is, the oblique edges,
Triangular packaging bags with a gusseted opening are now produced in large quantities, making it easy to form gussets on the beveled edges, which was not possible with conventional triangular packaging bags. We have achieved remarkable results in that it can be realized.

Moreover, since the bags are manufactured continuously by the operations of cutting and fusing as described above, there are great practical benefits in that mass production becomes possible and bag manufacturing can be automated by machines or the like.

Furthermore, since the packaging bags manufactured in this way prevent the generation of static electricity between the front and back pieces by forming the gusset as described above, there is no possibility that the two pieces of the bag will come into close contact with each other. Therefore, it is possible to easily open the bag, especially by machine, and as a result, it is possible to automatically package special shaped products such as rice balls using the triangular packaging bag, which improves the efficiency of the packaging work. There is a huge practical benefit of a significant improvement.

Furthermore, when the product is stored, the gusset expands and the packaging bag conforms to the shape of the product, so the bag never loses its shape.

EMBODIMENT OF THE INVENTION Hereinafter, embodiments of the present invention will be described according to an example shown in the drawings.

First, as shown in Fig. 1, a long film 1 made of a plastic synthetic resin of ¥15 previously formed into a cylindrical shape is fed 1 to 1, and then a second film is fed.
As shown in the figure, both side edges 2.2 of the long film 1 are folded inward to form a gusset 3.3.

Next, as shown in FIG. 3, the long film 1 is cut at an angle of about 60 degrees with respect to both side edges 2, 2, and then fused at an angle of about 60 degrees with respect to the cut line 4. do. The fusing line portion 5 is formed to intersect the cutting line portion 4 slightly inside the gusset 3.3.

Then, the long film l is further cut at an angle of about 60 degrees with the fusing line 5 and parallel to the cutting line 4, and then at an angle of about 60 degrees with the cutting line 4. Then, the fused wire portion 5 is formed again. Cutting and melting like this 11
By repeating steps 1i alternately, the cutting line portion 4 is formed into the opening 6, the fusing line portion 5 and the gussets 3, 3 are formed into the beveled edges 7, 8.
The outer shape of a large number of packaging bags 9 is formed, and at the same time, the triangular remaining portion 10 shown in FIG. A chamfered portion 13a is formed on the upper edge of the other bag. Furthermore, by cutting the triangular end portion 14 facing the remaining portion 1o, the other chamfered portion 13
After that, one side of the trapezoidal film was cut along the dashed line of the cut and melted bag shown in FIG. 3, and the remaining film was sealed into a sealing piece 1.
5, a triangular packaging bag 9 is manufactured in M shape as shown in FIG.

The packaging bag 9 manufactured as described above has the gusset 3 formed on the beveled edge 8, so the packaging bag 9
A gap is created between the front piece 16 and the back piece 17 of the front piece 16,
There is no static electricity generated between the back pieces 17, and the opening of the packaging bag 9 can be done very easily.
The storage work can be done very easily. The opening 6 of the packaging bag 9 containing the rice balls 18 is sealed with the sealing piece 15 as shown in FIG. 5.

In the above example, the long film l was cut (you cut it by pi8, but conversely, it was cut after cutting the long film l, or cutting 111i and hot melting LIJi were carried out simultaneously. However, the order of the cutting and heating steps does not matter.

Furthermore, in this example, about 6
Cutting and thermal cutting are performed alternately at an angle of 0 degrees, and this cutting and y,! ) /81! The angle at which the ft is performed is not limited to this, for example, it may be formed at an angle of about 45 degrees as shown in FIG. Therefore, the shape of the packaging bag 9 is not limited to the equilateral triangle shown in this embodiment, but may be an isosceles triangle as shown in FIG.

Furthermore, the material of the packaging bag 9 in the above embodiment is not limited to the synthetic resin type film of the embodiment, but may also be a sheet material thicker than the film, in short, a thermoplastic synthetic resin sheet material that can be thermally melted and cut. It's fine if that's the case, and the quality of the month is never a question.

Further, in this embodiment, a long film 1 previously formed into a cylindrical shape is used as the bag's cover, and this long film is formed by, for example, both ends 19a of one film as shown in FIG. , 19b may be formed into a cylindrical shape by heat-sealing the film 2o and the sheet JA21 thicker than the film 20, as shown in FIG.
It may be formed into a cylindrical shape by heat sealing both ends 20a, 20b and 21a, 21b, respectively. In particular, in the case of the embodiment shown in FIG. 8, it is possible to configure the front piece I6 of the packaging bag 9 with a transparent film 20 and the back piece 17 with an opaque film 14'21. This has the advantage that it can be more clearly recognized in appearance and the strength of the packaging bag 9 is guaranteed.

Further, the remaining portion 10 and the triangular end portion 1 in the above embodiment
4 is not necessarily an essential step for the present invention, therefore, the chamfered portions 13a, 13b on both sides of the sealing piece 15 and the lower portion 11
The small opening 12 of the packaging bag 9 manufactured according to the present invention
It is by no means essential.

Furthermore, the product stored in the packaging bag 9 is not limited to the rice balls of this embodiment, but may be other processed rice foods (and is not necessarily limited to processed rice foods). In short, the product may be any product as long as it can be stored in the triangular packaging bag 9, and its KaEtR does not matter at all.

All modifications may be made within the intended scope of the invention.

[Brief explanation of drawings]

FIG. 1 shows the conveyance process of a long film, (a) is a plan view, and (b) is an enlarged cross-sectional view along line 8-Δ of (a) with the middle omitted. Figure 2 shows the gazette forming process, (a) is a plan view, (a) is a plan view, (
B) is an enlarged cross-sectional view along line B-B of (A) with the middle omitted. FIG. 3 is a plan view showing the process of cutting and fusing. Figure 4 shows the packaging bag after manufacturing, (A) is a front view, (
B) is a sectional view taken along the line C-C of (A), and (C) is a D- of (A).
An enlarged sectional view of line D with the middle omitted. FIG. 5 is a perspective view of the packaging bag with products stored therein. FIG. 6 is a plan view showing another embodiment of the cutting and /8 cutting steps. FIG. 7 and FIG. 8 are enlarged cross-sectional views with the intermediate portion omitted of a long film of another example. 1... Long film 2a, 2b... Both side edges 3
a, 3b... Gusset 4... Cutting line part 5... Fusing line part 6... Opening part 9... Packaging bag applicant Daikei Co., Ltd. applicant Nissan! V Fukuro Co., Ltd. Agent Patent Attorney Original Noboru Figure 1 (B) Figure 2 (B)

Claims (1)

[Claims] A gauze 1. is formed by folding in both side edges 2.2 of a long cylindrical sheet material made of thermoplastic synthetic resin. Forming 3°3,
Next, the long sheet material is cut across the both side edges 2, 2, and the long sheet material is thermally cut at a predetermined angle to form a triangle with the cutting line 4. By this, the cutting line portion 4 is set to the opening portion 6 side,
A triangular packaging bag 9 is manufactured in which the side edge 2 where the gusset 3 is formed and the fusing line portion 5 formed by thermal fusing are respectively side oblique edges 7.8. A method for manufacturing a triangular packaging bag having: