JP3055720U - Powder packaging paper bag - Google Patents

Abstract

(57) [Summary] [PROBLEMS] When filling a conventional bag body with powder, the powder adheres to the surface of the hot-melt adhesive applied to the inner surface of the cylindrical injection valve, and heat bonding after filling. To solve problems such as sometimes unable to seal the inlet. SOLUTION: A bent piece is formed by providing two cuts at predetermined intervals from the upper and lower ends of a cylindrical injection valve at an edge of a polymerized paper portion, and a bent position from the edge of the bent piece. The injection port of the cylindrical injection valve was provided on the inside, and a hot-melt adhesive was applied to the inner surface of the bent piece.

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper bag for storing powder such as flour.

[0002]

2. Description of the Related Art A powder packaging paper bag of this type is disclosed in Japanese Utility Model Publication No. 61-26193. In the above, the tip of the cylindrical injection valve provided in the bag body is made to protrude from the bag body, and the inner surface of the protruding tip is coated with a hot-melt adhesive. Therefore, when the powder is filled in the bag body, the powder adheres to the surface of the hot-melt adhesive, and there is a problem that it is not possible to completely seal when heating and bonding after filling.

[0003]

An object of the present invention is to solve the above-mentioned conventional problems and to provide a powder-packing paper bag which can reliably seal the injection port of a cylindrical injection valve.

[0004]

Means of the present invention is to provide a cylindrical injection valve at the upper end corner between the vertical glue margin and the overlapped paper part on one side of the bag body, and heat-melt the inner side thereof. A powdered packaging paper bag coated with a conductive adhesive, and forming a bent piece by providing two notches at predetermined intervals from the upper and lower ends of the cylindrical injection valve at the edge of the polymerized paper portion. In addition, the injection port of the cylindrical injection valve is provided at a position retracted from the edge of the bent piece, and a hot-melt adhesive is applied to the inner surface of the bent piece.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, reference numeral 1 denotes a bag body formed by folding gussets on the left and right sides, and is formed in multiple layers of kraft paper. A cylindrical injection valve 4 is provided at the upper end corner of one side of the bag body 1 between the vertical glue margin 2 and the superposed paper section 3, and a hot-melt adhesive 5 is applied to the inner side thereof. . In the present invention, two cuts 6, 7 are provided at predetermined intervals from the upper and lower ends 4a, 4b of the cylindrical injection valve 4 at the edge of the overlapped paper portion 3, and the bent piece 8 is formed between both cuts. The injection port 4c of the cylindrical injection valve 4 is formed at a position retracted from the edge of the bent piece 8, that is, at a substantially intermediate portion of the bent piece 8, as shown in FIG. Apply a hot-melt adhesive (hot melt) 5 to the inner surface. After filling the powder into the bag body 1 from the cylindrical injection valve 4, the bent piece 8 is returned to the original position as shown in FIG.

[0006]

According to the present invention, after filling the bag body with the powder, the bent piece is returned to the original position as shown in FIG. The sealing can be reliably performed, and there is no possibility that the stored powder leaks.

[Brief description of the drawings]

FIG. 1 is a perspective view

FIG. 2 is a perspective view showing a state in which a bent piece is returned to an original position after powder filling and heated and adhered.

[Explanation of symbols]

 1 Bag body 2 Vertical glue margin 3 Overlapping paper 4 Cylindrical injection valve 4a Upper end 4b Lower end 4c Injection port 5 Hot-melt adhesive 6 Cut 7 Cut 8 bent piece

Claims (1)

[Utility model registration claims] A cylindrical injection valve is provided at an upper end corner of one side of a bag body between a vertical glue margin and a superposed paper portion, and a hot-melt adhesive is applied to the inner surface thereof for powder packaging. A paper bag, wherein two notches are provided at predetermined intervals from the upper and lower ends of the cylindrical injection valve at the edge of the superposed paper portion to form a bent piece, and the bent piece is pulled from the edge of the bent piece. A powder-packing paper bag, characterized in that an injection port of a cylindrical injection valve is provided at a position where it is inserted, and a hot-melt adhesive is applied to the inner surface of the bent piece.