JPS607335Y2 - packaging bag - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of packaging bags for packaging products such as socks and ties. The point is that it can be provided easily and at a low price.

In the drawings, to explain this example, vinyl chloride,
The left and right edges 3, 3 of the front and back plates 1 and 2, which are made by folding a plastic film such as polypropylene in half, are heat fused to form a bag opening 4 with an open top. In a case where the folded sealing piece 5 is an extension of the front and back plates 1 extending to one side, a reinforcing plate 8 made of what is commonly called synthetic paper, which is made by laminating or coating paper 7 with a plastic film 6, is attached to the folded sealing piece 5. overlapped on the inner surface, and aligned the left and right overlapped portions 9, 9 with the upper extension lines of the left and right edges 3, 3 of the front and back plates 1.2, so that the left and right edges 3,
They are integrated by heat fusion at the same time as step 3.

Note that the adhesive tape 1 for sealing is attached to the upper edge of the bent sealing piece 5.
2 is attached.

The packaging bag having the above structure is made by putting a product such as a bag inside, and then folding the folded sealing piece 5 together with the reinforcing plate 8 over the upper edges of the front and back plates 2 as shown in FIG. 12
Seal it with.

In the present invention, as described above, the reinforcing plate 8 in which the plastic film 6 is laminated or coated on the paper 7 is superimposed on the inner surface of the folded sealing piece 5, so that the folded sealing piece 5 with high toughness is obtained. be able to.

In particular, the plastic film 6 of this reinforcing plate 8 has a bent sealing piece 5.
The reinforcing plate 8 is bent so that its left and right edges coincide with the upper extension lines of the left and right edges 3, 3 of the front and back plates 1, 2 to be heat-sealed. Since the reinforcing plate 8 is superimposed on the inner surface of the bent sealing piece 5 so as to extend to both left and right ends of the sealing piece 5, the reinforcing plate 8 is thermally fused to the left and right edges of the front and back plates 1 and 2. It can be carried out at the same time as heat-sealing, and therefore the reinforcing plate 8 can be bonded at the same time as the bag is manufactured without requiring any special joining process or labor, making the manufacturing of the packaging bag extremely simple and inexpensive. This has a great practical effect in that it can be provided to people.

[Brief explanation of drawings]

FIG. 1 is a back view of the packaging bag according to the present invention, FIG. 2 is an enlarged longitudinal side view of the same, and FIG. 3 is a side sectional view of the packaging bag in a sealed state. 1...Made top plate, 2...Bag back plate, 3,3
...Both left and right edges, 4...Bag opening, 5...
...Folded sealing piece, 6...Plastic membrane,
7...Paper, 8...Reinforcement board.

Claims (1)

[Scope of utility model registration request] Front and back plates 1 and 2 made of plastic film
A bag opening 4 with an open top is formed by heat-sealing the left and right edges 3, 3, and an extension of the front and back plates 1 on the side of the bag opening 4 is used as a folded sealing piece 5, and the folded In a packaging bag in which a reinforcing plate 8 is superimposed on the inner surface of a curved sealing piece 5, the reinforcing plate 8 is
The reinforcing plate 8 is constructed by laminating or coating a plastic film 6 on it, and the left and right edges of the reinforcing plate 8 are folded in line with the upper extension lines of the left and right edges 3, 3 of the front and back plates 1, 2 to be heat-sealed. A packaging bag characterized in that a curved sealing piece 5 is extended to both left and right ends and heat-sealed.