JPS5931553Y2 - free standing pouch - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a self-supporting pouch for filling and sealing the contents of liquid or liquid-containing beverages, foodstuffs, and the like.

Conventionally, as a self-supporting pouch, the outer periphery of the bottom made of a sheet similar to the body is thermally fused to the lower end of a body made of a sheet made of a thin metal layer with a heat-melting resin layer integrally formed on the inner surface of the body.
A so-called self-supporting pouch is known in which the center side of the bottom heat-sealed portion is located above the lower edge of the body.

However, in conventional self-supporting pouches, the body was sealed by heat-sealing the edges of two sheets on both sides, so the area of the heat-sealed portion was large compared to the content of the pouch, resulting in a large size. ,
There were problems in that a large amount of sheet material was consumed, and since there were heat-sealed parts on both front side edges, the appearance was not very good.

This idea solves the above-mentioned problem by forming a body by joining both side edges of one sheet at the back of the body, and it is small but has a large internal capacity, and has the same content as conventional products. The purpose of this invention is to provide a self-supporting pouch that requires less sheet material and has a smart appearance since no joints such as heat-sealed parts are formed on the front surface.

An embodiment of this invention will be described below with reference to the drawings.

In FIGS. 1 to 3 and 6, 1 is a body, and this body 1 is made of a heat-fusible sheet such as a polyethylene sheet or a thin metal layer such as aluminum foil with a heat-fusible material such as polyethylene on the inner surface. The thin resin layer is superimposed on the inner surface of both side edges of a flexible sheet in which a thin resin layer such as polyester is integrally formed on the outer surface of the thin metal layer, and is thermally fused over the entire length in the longitudinal direction. This heat-sealed part 1a was positioned at the center of the back side of the body 1 in the lateral direction, and the heat-sealed part 1a was bent closely to the back face of the body 1 to form a flat cylindrical shape. It is something.

Reference numeral 2 is a bottom pleated sheet made of a sheet similar to that of the body 1. The sheet is folded into a vertical V-shape on the side surface, and a cut 1C is made at the lower end of the fold line 1b on both sides of the body 1, and the open end of the bottom pleated sheet 2 is folded into the body 1 It is inserted so as to form a W-shaped cross section so as to match the lower edge of the .

The inner surface of the outer circumference of the bottom 2 is sealed 2a by heat sealing with the inner surface of the lower end of the body 1 as shown in FIG.
The seal 2a is extended 2b, 2 to the intersection of the folded back line 10 of the folded sheet 2 and the trunk edge 1b so that the central part is located above the lower edge of the trunk 1 and maintains its independence.
b', and the front and back portions of the bottom 2 near both side edges 1b are adhered to each other by appropriate means 2C, 2C'.

The seal structure of the bottom is as shown in Fig. 7.
Instead of a, 2b, 2b', use one curved sticker 2d.
It may also be the same depending on the situation.

The self-supporting pouch constructed as described above is filled with a liquid or a content containing liquid, and the upper end of the body 1 is heat-sealed to seal the content, thereby sealingly packaging the content.

In this state, the pouch is inflated by the contents, and since the lower end of the body 1 and the outer circumference of the bottom folded sheet 2 are heat-sealed as in the above-described configuration, the pouch can be displayed on its own.

Fig. 4 shows another embodiment of this invention in which both side edges of the body 1 are overlapped so that the inner and outer surfaces face each other, and are attached and sealed by appropriate means 1d, and Fig. 5 shows both side edges of the body 1. Still another embodiment of this invention is shown in which the parts are abutted and a tape 3 is applied across both sides of the abutted part 1e for sealing.

As explained above, according to this invention, the body of the self-supporting pouch is constructed from one sheet, the both side edges of this sheet are joined and sealed by means such as heat fusion, and the circumferential part is attached to the body of the self-supporting pouch. Because it is located on the back side of the product, unlike conventional products in which the edges of both sides of two sheets are heat-sealed, there is no need to increase the width of the body in areas where the contents cannot be filled. If the width is the same, it can be made smaller and smaller, and since there is only one joint on the body, the sheet material required for the joint can be saved by one place compared to conventional products, and the body can be made smaller. Since there are no joints on the front side of the pouch, the entire front side can be printed, making it possible to provide a self-supporting pouch with a sleek and good appearance.

In addition, since the bottom of the self-supporting pouch is formed of only one bottom pleated sheet, it is easy to manufacture, and since there is no fused part of the sheet in the center of the bottom, it has advantages such as excellent strength.

[Brief explanation of drawings]

Fig. 1 is a rear view showing one embodiment of this invention, Fig. 2 is a sectional view of the same side, Fig. 3 is a cross sectional view of the same, and Figs. 4 and 5 are different versions of this invention. The cross-sectional views, FIGS. 6 and 7, respectively showing the embodiments are explanatory diagrams of the sealing structure of the bottom pleated sheet. 1... Body, 1a... Heat fusion part, 2...
...Bottom, 2a...Heat-sealed part of the bottom.

Claims (1)

[Scope of utility model registration request] A trunk main body, which is a single-layer or multi-layer sheet, and in the case of at least multiple layers, the innermost layer is made of a heat-fusible material, and the both side edges of the sheet are joined and sealed over the entire length in the vertical direction at the back surface of the trunk; A bottom folded sheet is folded to form an upright V-shape in cross section at at least one mouth of the trunk body, and the lower end thereof is sealed with the front and rear lower ends of the trunk body, respectively, and the folded inner part of the folded sheet Fold and seal the front and rear inner surfaces of each main body on the facing pleated sheet surfaces with two inclined lines or curves starting from the edge of the side on the line, and adhere the both sides of the pleated sheet to each other to make it self-supporting. A self-supporting pouch that has been given sex.