JPS6126197Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a packaging bag provided with air circulation means.

When closing a packaging bag made of a front film and a back film made of soft synthetic resin, as shown in FIG. After folding it back, it is pasted with a pressure-sensitive adhesive band 6 interposed therebetween. In this case, air gets into the bag when storing the product, but
When the lid piece 5 is folded back at its base, there is a problem that the bag becomes bulky because it is difficult for the air inside to escape.

Therefore, in order to vent the air inside this type of packaging bag, conventionally, as shown in FIG. Therefore, a gap having a width g is formed on the left and right sides of the folded portion of the lid piece 5, and the opening 2 is communicated with this gap. This means has the advantage that the structure is simple by simply changing the position of the fold of the lid piece 5, but the bag 1
Since the inside and outside of the bag are always in communication, it is easy for dust and dirt to enter the bag through the gap and adhere to the product 10 while it is on display at the store, resulting in a significant decrease in the value of the product 10. I have a problem.

Further, as shown in FIG. 2, by folding the back film 3 and the front film 4 in a partially overlapping state, the opening 2 is completely closed, while the front film 4 is placed opposite the opening 2. It has also been proposed to drill an air vent hole 9' in the side part, but even in this case, since the air vent hole 9' is always exposed to the outside, dust will not enter the bag 1 from this air vent hole 9'. It was impossible to avoid the intrusion of dirt and dust, and problems similar to those described above would occur.

The present invention provides air circulation means by forming an air circulation means in a portion of the front film covered by the lid piece.
The bag is designed to reliably release the air inside the bag and prevent dust and dirt from entering from the outside.

Next, the present invention will be explained based on the embodiment drawings (Figs. 3 to 5). The packaging bag 1 is made by folding one film to form two layers, or by overlapping two films and heat-sealing the outer edges to form one side. It is formed with an open edge. Of these, the back film 3 is extended from the opening 2 by an appropriate dimension L1 to form a lid piece 5, and the top surface of the tip of the lid piece 5 has a pressure-sensitive material having an appropriate width along the opening 2. An adhesive strip 6 is applied, and a removable protective tape 7 is further attached to this pressure-sensitive adhesive strip 6.

A crease 8 approximately parallel to the opening 2 is formed in the overlapping portion of the front film 4 and the back film 3 in the vicinity of the opening 2 at a position that is inserted into the opening 2 by an appropriate length L2, so that the front film 4 and back film 3
It is constructed so that it can be folded back against the surface of the front film 4 in a state where the two are partially overlapped. The front film 4 is located between the fold line 8 and the area to which the adhesive band 6 of the lid piece 5 is attached when both the front and back films 4 and 3 are folded back, that is, a distance l inside from the fold line 8. An air circulation means 9 consisting of a cut or a cut-out hole is provided in this area.

In the above configuration, after storing the product 10 through the opening 2, the protective tape 7 of the adhesive band 6 of the lid piece 5 is peeled off, and the front film 4 and the back film 3 are partially overlapped. The lid is closed by folding back the front film 4 along the fold line 8 and pasting the adhesive strip 6 of the lid piece 5 to the front film 4. In this case, when the product 10 is inserted, the packaging bag 1 swells and air accumulates inside, but the top film 4 does not reach the area where the air circulation means 9 is formed.
Since the bag 1 and the back film 3 simply overlap each other, when the center of the bag 1 is pressed from above and below, the air inside will escape from the air circulation means 9 to the outside. Furthermore, since the air circulation means 9 is covered by the lid piece 5, it is almost impossible for external dust and dirt to enter the bag from the air circulation means 9.

In the embodiments shown in FIGS. 3 to 5 above, when both the front and back films 4, 3 are folded back, the air circulation means 9 is located between the front edge of the front film 4 and the adhesive band 6. However, in other words, the air circulation means 9 is covered only by the lid piece 5, but as shown in FIG. The circulation means 9 may also be covered by the folded piece of the front film 4. In this way, the air circulation means 9 is doubly protected, making it even more difficult for dust, dirt, etc. to enter.

In addition, although the above embodiment was a case in which the opening was formed at the upper edge of the packaging bag, openings were formed at both the upper and lower ends of the bag, and each opening had the structure of the present invention. It's okay.

As described above, the present invention can release the internal air through the air circulation means formed on the front film, so it is possible to prevent the packaging bag from remaining swollen after storing the product, and the appearance On the other hand, since the air circulation means is always covered by the lid piece extending from the back film, external dust and dirt may enter the packaging bag once the product is stored. This has the effect of reliably preventing product value from being reduced due to dirt during display.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams showing conventional packaging bags;
3 to 6 show an embodiment of the present invention, FIG. 3 is a plan view of the packaging bag before closing the lid, FIG. 4 is a plan view of the packaging bag with the lid closed, and FIG. 5 is a plan view of the packaging bag with the lid closed. FIG. 4 is a cross-sectional view taken from the side, and FIG. 6 is a cross-sectional view of the same portion as FIG. 5 of another embodiment. 1... Packaging bag, 2... Opening, 4... Front film, 3... Back film, 5... Lid piece, 6...
Pressure-sensitive adhesive strip, 8...fold, 9...air circulation means.

Claims (1)

[Scope of utility model registration request] A front film and a back film made of soft synthetic resin form a bag body with at least one side opening open, the back film is appropriately extended from the opening to form a lid piece, and the front film and back film are connected to each other. is configured to be folded back to the front side of the front film along a fold line substantially parallel to the opening, while the front film is affixed to the tip edge of the lid piece so that when both the front and back films are folded back, In the packaging bag provided with the pressure-sensitive adhesive band, an air circulation means is formed between the fold line in the front film and the part of the lid piece to which the pressure-sensitive adhesive band is attached. Characteristic packaging bags.