JPH02233367A - Opening method of resin-sealed bag - Google Patents

Abstract

PURPOSE:To permit the top of a bag to be torn off in one direction in case of being broken in the midway of tearing along a perforation line by tearing from the other end by providing a pouring-out opening of the bag at the opposite sides thereof with V-shaped sealed faces capable of being easily cut along perforations horizontally extending to each side of the bag. CONSTITUTION:When a bag 1 having a sealed lower end 2 is heat sealed at the top into a flat face of a suitable width, an unsealed part 4 to serve as a pouring-out opening when opened is formed preferably midway between both side edges of the bag 1 with the opposite edges thereof shaped into the form of V-shaped notch and with a perforation 5 formed thereon for cutting off the flat sealed face 3 horizontally toward each side thereof. More specifically, the ends of the perforation line in the vertexes of the V-shaped bottoms 5 of both sides of the pouring-out opening face 4, so that it can be opened in either direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application in Industry] The present invention is particularly applicable to vt. The bag is made of a resin film of appropriate thickness and strength, such as polypropylene, or a cylindrical body that can be used to hold the bag, and the opening and sealing surface is heat press welded in advance or at the same time as the contents are filled. The present invention relates to a resin-based sealing bag that can be used for storage, and an appropriate method for opening the sealing bag, which is excellent in transportation and storage.

[Background of the invention and its problems]

Usually, the material of this type of synthetic resin sealing bag is specifically polypropylene (○.P.P), and polyester or nylon, or even a composite thereof, can be considered.
The material is not particularly limited.

In addition, in the bag making process, the original fabric is automatically fed out on the feed table with an opening at the top, and a thermal cutting blade that works in conjunction with the thermal welding device is used at intervals of a predetermined width proportional to the feeding speed. By heating and welding, predetermined areas are cut at the same time as the bags are welded, and bags are made by repeating this process.These heat welding and heat cutting processes are continuously repeated at a considerably high speed. Bags are made in large quantities.

Resin sealing bags with excellent transparency produced in this way have high oxygen permeability and high moisture shielding rate, and the contents of the package are clearly visible at a glance, so they are mainly used for commercial purposes. For example, powdered juice bases, various powdered or liquid soup bases, powdered stock bases, commercial sauces, soy sauce, miso, gel jams, semi-kneaded fluid cooking processing materials, etc. The contents, which are bags for filling viscous liquids, etc., and which would be extremely difficult to transfer to a spare bag in the event that the bag should be torn, are placed in the resin sealing bag of a size appropriate for the purpose of use. It is used for filling, storing and transporting large quantities.

In other words, it is lightweight, inexpensive, and can be filled with contents and sealed completely, making it easy to create a cubic shape that can be freely moved vertically and horizontally. Therefore, it is used in all fields without distinction, and its range of use is extremely wide. There is.

However, especially for the above-mentioned commercial fluid food materials or agricultural and industrial chemical materials, once the bag is torn, it is extremely difficult to transfer it to a spare bag, and post-processing thereof is not easy. Regarding a method for opening a pouring spout filled with fluid contents analogous to JP-A-57-117337 and JP-A-63-248654, the former Japanese Utility Model Application Laid-open No. 57-117-248654 discloses In the case of the No. 07337 publication, although the spout is provided at the center of the upper part of the bag, there is no design around the side of the bag, so the spout of the bag can be opened by using the perforations along the break line. When opening, an almost instantaneous force is applied at the time of opening, and there is no guarantee that the abutting spout surface can be opened horizontally and securely due to the expansion strength. There are drawbacks such as tearing diagonally from the corner of the spout, that is, the neck of the spout, and quality cannot be guaranteed. Furthermore, in the case of the product disclosed in Japanese Patent Application Laid-open No. 63-248654, when the end is grasped in the hand and broken from the sewing machine opening, the unsealed part that is an extension of the end and becomes the spout is broken by strong tearing inertia. Although it is reasonable that the package can be opened, there remains a question of reliability. In other words, unlike an ultra-thin resin film, a somewhat thick resin sealing bag is often expected to bounce diagonally upward or open diagonally downward, and in rare cases, the perforation This exposes the inherent drawbacks of plastic sealing bags, such as the fact that there is no way to do anything about it unless you prepare a knife, especially if the bag ends up straight up or is torn.

In other words, although this type of bag usually has excellent convenience,
Since the method of opening the pouring spout or the delivery spout is not reliable and the above-mentioned drawbacks exist, there is a strong demand for a resin sealing bag that is not only convenient but also durable and functional.

[Means for solving problems]

The present invention has focused on the above-mentioned reasons, and furthermore, in order to completely eliminate the drawbacks of the disclosed materials, the present invention is the result of intensive research by reexamining the tensile strength that is inevitably applied when opening this type of resin bag under various conditions. When sealing the appropriate surface width part of the upper end of the bag using a thermocompression mold, the spout is arranged so that it fits around the center of the bag rather than the edges, and a break line sewing machine is inserted from the side edge of the bag. While the holes are drilled horizontally, the contact areas on both sides of the spout can be easily opened.■The sealing surfaces are cut in the shape of a cut.
Even if a tear occurs along the line-shaped perforations, it can be torn off again from the opposite side, thus solving the problem all at once.

[Preferred embodiment of the invention]

A method of opening the resin sealing bag of the present invention that achieves the above object will be explained below with reference to the drawings.

FIG. 1 is a perspective view showing the overall configuration of an embodiment of the present invention, FIG. 2 is an enlarged plan view of the essential parts of the present invention in FIG. FIG.

The structure of the present invention is a method for opening a sealing bag made of a synthetic resin film having an appropriate thickness, and specifically, the resin shown in FIG. To explain the adhesive sealing bag 1 as an example, when the lower end becomes the sealing surface 2 and the entire width of the bag 1 is welded and sealed in a flat shape, the 7s seal which becomes the spout when opened is used. The non-contact surface 4 is arranged so as to be located preferably at the center side away from the side edges of the bag 1, and the contact surface 4 is placed on both sides of the V.
The resin sealing bag of the present invention is constructed by forming a concave shape in the shape of a letter and welding the bag, and forming a break line perforation 5 for horizontally cutting the welded surface 3 in the direction of both ends. It is.

That is, the gist of the present invention is that the tip of the perforation to be opened is a V-shaped trough 6 that penetrates into both sides of the spout surface 4, and when opening the spout surface 4, either the left or right The gist of the present invention is that the opening can be opened from the direction of .

Furthermore, the embodiment shown in FIG.
is formed almost at the center of the sealing bag A, and instead of a V-shaped valley 6 into which the porcelain perforation 5 enters both sides, the spout surface 4 is shaped by welding both end sides and the center side. Another feature of the present invention is that it is formed into a square shape with two relatively narrow pouring ports, and that both ends thereof are perforated along a horizontal line.

It should be noted that the present invention is not limited to a bag that is attached at the top and bottom as shown in the drawings, but can of course be applied to a sealed bag at the side end portion or a stand pack type.

[Effects of invention]

According to the present invention configured in this way, even when the bag is used for contents that are extremely difficult to restore once the bag is torn, there is no cause for concern when opening the bag; It can be opened reliably horizontally by tearing at the perforations.

In other words, the tip of the tear line perforation opening is characterized by a V-shaped trough that enters into both sides of the spout surface that comes into contact from either the left or right direction, and the tip is a V-shaped trough that enters into both sides of the spout surface that comes into contact from either the left or right direction, and the tip is a recessed part as shown in Figure 3. Since the seal is in contact with the seal, it has the advantage that anyone can open the package easily and easily without any mistakes.

For example, even if either the left or right side is torn off in the middle, it can be torn off from the opposite side, and furthermore, in the case of a narrow spouting surface of 20 mm as shown in Figure 3, only one side can be opened. It is extremely convenient to use as a spout for pouring small amounts.

As described above, the present invention forms relatively conspicuous V-cuts or recesses at both ends of the conventional outlet, making it obvious to the user that the package will be opened at a glance. The added utility is that it is economical and can be added extremely easily without modifying conventional bag-making machines, and in addition to its functionality, it can provide the ideal resin sealing bag that can kill two birds with one stone. , extremely significant and remarkable effects can be expected.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the overall configuration showing one embodiment of the present invention. FIGS. 2 and 3 are partially cutaway views showing the essential parts of the present invention in an enlarged plan view. A... Resin sealed container of the present invention. 1... Surface forming a packaging bag, 2... Sealing part, 3...
- Welding surface, 4... Open extraction port, 5... V-shaped valley, 6 Break line (perforation), 7... Elongated hole for handle. Patent applicant Shinyo Co., Ltd. Representative director Norio Ishii Figure 3

Claims (1)

[Claims] 1. A method for opening a sealing bag made of a synthetic resin film having an appropriate thickness, in which the entire width of the upper end is welded and sealed to form a flat surface. Arrange the non-welded surface, which will become the spout when opened, to be located away from the side edges of the bag, preferably at the center, and horizontally extend both sides of the welded surface, which will become the sealing bag. A break line perforation is formed in the end direction, and the part that comes into contact with the spout surface is a V-shaped valley into which the perforation enters, and the bag can be opened from either the left or right direction. A method for opening a resin sealing bag configured as follows. 2. Form the above-mentioned unsealing spout almost at the center of the bag, recess both ends of the spout surface, and weld the center side to form a two-port II shape, and horizontally extend to both ends of the spout. A method for opening a resin sealing bag, characterized in that a hole is made so as to penetrate a break line perforation for cutting from the bag.