JPS5974064A - Packing bag - 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 novel packaging bag, in which packaging bags having oblique or arcuate corners without sharp protrusions can be continuously obtained.

In order to prevent the corners of conventional packaging bags from sticking, especially at the bottom corners, the tips of the corners are cut diagonally in a separate process, or during continuous bag making, the corners on both sides of the bottom of the packaging bags are cut off diagonally in a separate process. A V-shaped notch is formed in the lateral direction along the side line at the corner portion, and the packaging material is cut from the tip of the V-shaped notch to form a packaging bag. In this case, the ■-shaped notch is formed. Because the rotational feed of the cutter and the packaging material cutting cutter are not necessarily synchronized, the packaging material cannot be cut from the tip of the ■-shaped notch, and as shown in Figure 1, the packaging material is cut near the tip of the V-shaped notch A of the packaging bag. A sharp abutment B is produced, and this sharp abutment B protrudes into the package or the package filled with contents, causing the contents to leak (7). As a result of various experimental studies, the inventor has obtained the present invention which does not have these drawbacks.

Embodiments of the present invention will be described below with reference to FIGS. 2 and 3. A synthetic resin film rod body having a heat adhesive property such as polyethylene, polypropylene, polyvinyl chloride, etc. having a thickness of 10 to 100 μm or a heat adhesive material as described above A band-shaped packaging material whose inner surface is made of a composite film whose inner surface is made of synthetic resin film and whose outer surface is made of metal foil such as aluminum foil, art paper, paper base material such as cellophane, etc., and whose inner surface is heat-adhesive. Either two pieces of 1 are overlapped, or they are folded in half and overlapped to form the bottom heat-bonded part 2 continuously on one side edge in the length direction, and the bottom heat-bonded part 2 is perpendicular to the bottom heat-bonded part 2 at predetermined intervals. 1
A plurality of continuous side heat-bonded parts 3 are formed in . It is formed from the outer edge 7 of the adhesive part 2, and the plurality of side heat-adhesive parts 3 are cut along the cutting line 4 to form a packaging bag.

Another embodiment of the present invention shown in FIGS. 4 and 5 is made by overlapping two sheets of the same band-like hue 1 as in the previous embodiment, and forming continuous bottom heat-bonded parts 2 17 on both side edges in the width direction. At the same time, a plurality of side heat-bonded parts 3 are formed 17 at predetermined intervals and are continuous perpendicularly to the bottom heat-bonded part 2. An X-shaped cut 6 having an intersection point 5 near the end is formed from the outer edge 7 of the bottom thermally bonded part 2,
The plurality of side heat-bonded parts 3 are cut along the planned cutting line 4, and the band-shaped hue 1 is cut along the planned cutting line 8 at the center in the length direction to form a packaging bag.

Another embodiment of the present invention shown in FIGS. 6 and 7 has two strips of hue 1 similar to the previous embodiment superimposed, and one side edge in the length direction is folded in two. Insert the bottom wrapping material 9 with the inner edge facing the other side edge, and continuously form the bottom thermally bonded part 2 with a concave inner edge, and continue orthogonally to the bottom thermally bonded part 2 at prescribed intervals. A plurality of side heat-bonded parts 3 are formed, and an X-shaped cut 6 having an intersection point 5 near the end on the cutting line 4 of the central part of the plurality of side heat-bonded parts n3 is formed on the bottom heat-bonded part 2. is formed from the edge 7, and the plurality of side heat-bonded parts 3 are cut along the cutting line 4 to form a packaging bag.

In another embodiment of the present invention shown in FIGS. 8 and 9, two band-shaped packaging materials 1 similar to those of the above embodiment are overlapped and folded in half at both side edges in the length direction. Insert the bottom wrapping materials 9 facing each other inside, and form the bottom heat-bonded parts 2 with concave edges of the inner wall 1j continuously on both edges, and connect the bottom heat-bonded parts 2 and the bottom heat-bonded parts 2 at predetermined intervals. (J
11 To form a heat-bonded part 3, an X-shaped cut 6 having an intersection 5 near the end of the central cutting line 4 of the plurality of side heat-bonded parts 3 is made from the outer edge 7 of the bottom heat-bonded part 2, respectively. The packaging bag is formed and cut along the planned cutting line 4 of the plurality of side heat-bonded parts 3, and also along the planned cutting line 8 of the central part in the length direction of the band-shaped packaging material 1.

FIG. 10 is a perspective view of a package in which the packaging bags shown in FIGS. 6 and 8 are filled with contents and the opening 10 is sealed. It shows.

Another embodiment of the present invention shown in FIGS. 11 and 12 is a method in which two strip-shaped packaging materials 1 similar to those of the previous embodiment are overlapped, and one side edge in the length direction is folded in half. Insert the bottom wrapping material 9 with the other side edge facing the edge, and continuously form the bottom thermally bonded part 2 with a concave inner edge, and continue at predetermined intervals orthogonally to the bottom thermally bonded part 2. A plurality of side heat-bonded parts 3
A semicircular notch 11 having a center near the end of the planned cutting line 4 at the center of the plurality of side heat-bonded parts 3 is formed along the outer edge 7 of the bottom heat-bonded part 2, and a plurality of The packaging bag is made by cutting along the planned cutting line 4 of the side heat-bonded portion 3.

In another embodiment of the present invention shown in FIGS. 13 and 14, two strip-shaped packaging materials 1 similar to those of the previous embodiment are overlapped, and the side edges on both sides in the length direction are folded in half. Insert the bottom wrapping materials 9 with the inner edges facing each other, and form the bottom heat-bonded parts 2 with concave inner edges continuously on both side edges, and make the bottom heat-bonded parts 2 orthogonal to the bottom heat-bonded parts 2 at predetermined intervals. A plurality of continuous side heat-bonded parts 3 are formed, and a semicircular notch 11 having a center near the end of the central cutting line 4 of the plurality of side heat-bonded parts 3 is formed as a bottom heat-bonded part 3. A packaging bag is formed by cutting along the cutting line 4 of the plurality of side heat-bonded parts and along the cutting line 8 of the central part in the length direction of the strip-shaped packaging material 1. It is.

The packaging bag of the present invention formed as described above has no right angles, especially at the bottom corners, and has an oblique or circular arc shape, and even if the side heat-adhesive portion 3 is cut away from the planned cutting m4, the bottom It is safe because it does not produce sharp protrusions near the inner corners of the container, and when handled as a package, it will not be inserted into other packages or the hands of fish handlers.

[Brief explanation of drawings]

Fig. 1 is a plan view of a conventional packaging bag, Fig. 2 is a partial plan view of a continuum of packaging bags, Fig. 3 is a plan view of a packaging bag, and Fig. 4 is a continuum of packaging bags of another embodiment. FIG. 5 is a plan view of the packaging bag, FIG. 6 is a partial plan view of a continuum of packaging bags of another embodiment, and FIG. 7 is a diagram showing the relative position of the band-shaped packaging material and the bottom packaging material. 8 is a partial plan view of a continuum of a packaging bag according to another embodiment, FIG. 9 is a sectional view showing the relative position between the band-shaped packaging material and the bottom packaging material, FIG. 10 is FIG. 6, Fig. 8 is a perspective view of a package using the packaging bag, Fig. 11 is a partial plan view of a continuum of packaging bags of another embodiment, and Fig. 12 shows the relative position of the band-shaped packaging material and the bottom packaging material. FIG. 13 is a partial plan view of a continuous body of a packaging bag according to another embodiment, and FIG. 14 is a sectional view showing the relative position of the band-shaped packaging material and the bottom packaging material. 1... Band-shaped packaging material, 2... Bottom thermal adhesive part, 3
・・・Side heat-adhesive part, 4...Cutting line, 5.
...Intersection, 6. Figure 12th factor] 1 9

Claims (2)

[Claims] (1) The band-shaped packaging materials whose inner surfaces are thermally adhesive are overlapped, and the bottom thermally bonded portions are continuously formed on both side edges in the longitudinal direction, and the bottom thermally bonded portions are formed at predetermined intervals. forming a plurality of side heat-bonded parts that are continuous orthogonal to the bottom heat-bonded part, and forming an X-shaped cut from the outer edge of the bottom heat-bonded part having an intersection point near an end on a planned cutting line of the plurality of side heat-bonded parts; and a packaging bag obtained by cutting the plurality of side heat-bonded parts along a planned cutting line. (2) Overlap the band-shaped packaging material whose inner surface is thermally adhesive, and form a continuous bottom thermally adhesive part on one or both side edges in the length direction (7
At the same time, a plurality of side heat-bonded parts are formed at predetermined intervals and continue orthogonally to the bottom heat-bonded part, and the center is formed near the end on the planned cutting line of the plurality of side heat-bonded parts. A packaging bag in which a semicircular notch is formed from the outer edge of a bottom heat-bonded part, and the plurality of side heat-bonded parts are cut along a planned cutting line.