JPS6025419Y2 - sealed packaging bags - Google Patents

Description

[Detailed description of the invention] This invention encloses powdered, linear, liquid, etc. foods in a long and narrow bag made of synthetic resin film or paper laminated with synthetic resin, and seals the ends of the bag. The present invention relates to a sealed packaging bag having an opening cut on one side to facilitate tearing the bag.

For example, as the sealed packaging bag provided with the above-mentioned opening cut,
As shown in FIG.
After making a cylindrical body and filling it with the contents, the rim is glued to form stepped sealing parts 2' and 2', and opening cuts 5' are cut in advance on the wide side of the cylindrical body. When opening the bag, the bag is laterally cut through the opening cut to open a contents extraction opening 6' with a constant width leading to the outside, as shown in Figure B. be.

By the way, sealed packaging bags are made by rolling up a tape-shaped packaging material from one end, heating and gluing both edges to form a cylinder, and then gluing this at regular intervals to create a seal and filling it with the contents. When the above-mentioned side edges are glued together to form a cylinder, the adhesive part is the so-called envelope-like material overlapped along the cylinder wall, and the both sides are formed into ears of a constant width. There are two types of packaging material: the so-called kuragashi-zuri, in which the inner surfaces of each other are brought into contact with each other, and the pieces are glued together to form a backing piece that protrudes outward. Although it is necessary to have a wide joint,
It is said to have excellent strength and sealing properties because it can be evenly pressed and bonded from both sides using heated rollers.

Furthermore, in gassho tensioning, by making the width of the left and right ear pieces slightly wider than the required bonding width in advance, even if the bonding position shifts slightly due to sideways shaking of the packaging material during the manufacturing process, there is always sufficient This has the advantage that the adhesive width is maintained.

'Next, regarding the point of adding opening cuts to the sealing part of sealed packaging bags, it is originally not easy to tear off bags made of synthetic resin film without making cuts.
Once the cut is made, the tension of the bag itself, which is about to spread outward through the contents, tends to expand naturally, and the bag can be broken with a small amount of force.

This is particularly noticeable when synthetic resin films or cellophane laminated with synthetic resins have deteriorated in quality over time.

Therefore, in the conventional sealed packaging bag shown in FIG. There were cases where the product warped and was difficult to handle.

In contrast, this invention forms a packaging bag with a high degree of sealing by using the above-mentioned gassho flap that extends the adhesive of the packaging material to the outside, and also uses the stretched back flap to make opening cuts unlimited. It is designed to prevent it from spreading,
As shown in FIG. 1, the entire packaging material is made of a normal material and has the above-mentioned gassho tension on both sides, and a non-adhesive part 7 with a required width between the adhesive part and the edge. It is a bag body having a backing piece 1 formed with the backing piece 1 remaining, and sealing parts 2, 2 at both ends, and the sealing parts 2, 2 are inserted from one side edge to the base end of the backing piece 1. Wide part 3 of a certain size including
The backing piece 1 is folded to one side so as to almost overlap the wide part 3, and the backing piece 1 is folded to one side so as to almost overlap the wide part 3.
Opening cuts 5 are cut from the side edge of the wide portion 3 to the non-adhesive portion 765 of the outer edge of the backing piece 1.

``This invention has the above structure, and the backing piece 1 has an i
The sealing strength is high because of this gap 11 Of course, to open this, hold the overlapped sealing part 2 and backing piece 1 with your fingertips, and press along the opening cut 5. It is sufficient to tear it horizontally, and after cutting, a contents outlet 6 of the required width is opened as shown in FIG. 2.

In this case, in this invention, as is clear from FIG. Even if they were to expand, the proximal end of the backing piece 1 acts as a resistance, preventing their progress from reaching the rest of the wide portion 3.

This, combined with the need to hold the seal 2 and the backing piece 1 at the same time when opening the package, prevents the contents from suddenly spilling out. Since the cut 5 is provided in the non-adhesive part 7 provided on the outer edge, there is a possibility that this part gets caught on other objects when the package is not intended to be opened, and a pulling force is applied to the cut 5. However, it bends easily and releases the pulling force, so it has the effect of preventing the concubine from opening it.

[Brief explanation of the drawing]

Figures 1A-D and 2 illustrate this invention;
Figure 1B is an external view, Figure 1B is an enlarged cross-sectional view of the E line in Figure 1, Figure 1C is an enlarged cross-sectional view of the Rollo line, and Figure 1 is an enlarged cross-sectional view of the Harbor line.Figure 2 shows the opened state. External view, the third tooth is based on an example of the conventional one, Fig. 3A is an external view showing a part of it, and Fig. 3B is an enlarged cross-sectional view taken along the R'-R' line of Fig. 3A. It is. 1. Akira, spine piece, 2... calf area, 3...
...Wide part, 4...Narrow part, 5...
・・Opening cut, 6・・・・Contents removal port, 7・
...Non-adhesive part.

Claims (1)

[Scope of utility model registration request] An outwardly projecting backing piece 1 with the inner surfaces of both side edges along the longitudinal direction of the band-shaped packaging material adhered to each other, and each sealing portion having the backing piece 1 positioned in the middle and having the edges crushed and adhered. 2・2
In the sealed packaging bag, the outer edge of the backing piece 1 is made into a non-adhesive part 7 of a required width, and the sealing part 2 is formed from one side edge to a non-adhesive part 7 of a certain size including the base end of the backing piece 1. It is formed into a step-like shape consisting of a wide part 3 and a narrow part 4 that is flattened, and the front backing piece 1 is applied by tilting it to the wide side, and the wide part 3 of the sealing part 2 is This sealed packaging bag has opening cuts 5, 5 cut from the side edge to the non-adhesive part 7 of the outer edge of the backing piece 1.