JP3034674U - Paper bag with valve for powder packaging - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a paper bag with a valve for powder packaging, which saves the waste of materials and is comparable in use. SOLUTION: A bag body in which left and right gussets are folded (1) (1)
A part of the small piece of paper 3 which serves as a valve is adhered to one corner of the straight mouth edge (2a) of (2), and this is folded inward to provide the blowing port 6.

Description

[Detailed description of the invention]

[0001]

TECHNICAL FIELD The present invention relates to a paper bag containing powder such as cement and Meriken powder, and more particularly to a paper bag with a valve for powder packaging provided with a non-return valve.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7 (a), a paper bag of this type has a bag body 11 having gusset-folded folds 10 on the left and right, which is cut off except for a portion B forming a blow-in port. B is folded inward as shown in FIG. 3 (b) to form a blow port. In the figure, H is the height of the protrusion of the non-return valve and shows the size of the cut-off portion 12. L is the size when the bag is connected to the bag, L1 is the cylindrical cutting size (L = L1-H), B Is the standard folding dimension of the valve, D is the diameter of the blow-in opening, and 13 is the perforation line of the upper sewing machine. As described above, since the conventional paper bag has the cut-off portion 12, it means that the material is wasted by that much, and the amount thereof reaches an enormous amount.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper bag with a valve that eliminates the waste of the above-mentioned materials and is comparable in use.

[0004]

[Means for Solving the Problems] According to the means of the present invention, a square valve forming small piece of paper is applied to both the front and back sides of one corner of a straight mouth edge of a bag body with left and right gusset folds, and the small piece of paper is diagonally folded. Into a triangular front piece and a triangular rear piece, apply adhesive to the back surface of the triangular front piece only, and adhere it to the bag body, and fold the upper part of the bag body together with the adhered triangular front piece with a gusset fold. Folded inward and left the triangular rear piece along the straight edge, then sew the straight edge together with the remaining triangular rear piece with a sealing tape and sew it with a sewing machine A paper bag with a valve for powder packaging, characterized in that a blowing port is formed by a front piece and a triangular rear piece.

[0005]

1 to 6 show a specific example of a paper bag with a valve for powder packaging according to the present invention. In FIG. 1, reference numeral 2 denotes a bag body having left and right folded gussets 1 and 1, and a valve-forming small paper piece 3 is applied to both front and back surfaces at one corner of a straight edge 2a. This small piece of paper 3 is square and has a diagonal fold 3a, which is divided into a triangular front piece 3b and a triangular rear piece 3c. Then, the adhesive 7 is applied to the back surface of the triangular tip piece 3b and adhered to the bag body 2 (see FIG. 2). Next, the bonded triangular front piece 3b is folded inward from the diagonal fold 3a. At this time, the gusset folds 1 and 1 of the bag body 2 are also folded inward from P1 and P2 shown in FIG. 3, and thus the triangular rear piece 3c which is not adhered is left along the straight edge 2a (see FIG. 4). In this state, as shown in FIG. 5, the sealing tape 4 is folded in two on the straight edge 2a and sewn on the sewing machine 5 to form the blowing port 6.

[0006]

As described above, according to the present invention, it is not necessary to provide a cut-off portion for forming a conventional blowing port, and the small paper piece 3 is adhered to both front and back surfaces of the bag body 2 to complete the blowing port. Therefore, it is possible to mold without waste and the economic advantage is very large.

[Brief description of the drawings]

FIG. 1 is a front view of a valve forming small piece of paper adhered to a bag body.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is a front view showing a state where a triangular tip piece of a small paper piece is adhered to a bag body and folded inward.

FIG. 4 is a perspective view showing the state of FIG.

FIG. 5 is a front view in which a sealing tape is put on the straight edge of the bag body and sewing is performed on the sewing machine.

FIG. 6 is a perspective view showing a state in which powder is filled.

FIG. 7 is an explanatory view of a conventional example.

[Explanation of symbols]

 1 Gazette Folding Part 2 Bag Body 2a Straight Mouth Edge 3 Valve Forming Paper Piece 3a Diagonal Line Fold 3b Triangular Tip Piece 3c Trigonal Rear Piece 4 Sealing Tape 5 Sewing Machine 6 Blowing Port 7 Adhesive

Claims (1)

[Utility model registration claims] 1. A bag body (2) having left and right gussets folded (1) (1)
A square valve forming small piece (3) is applied to both front and back sides of one corner of the straight edge (2a) of the straight edge (2a). Divided into square rear pieces (3c), 3
Adhesive (7) is applied to the back surface of only the rectangular tip piece (3b) to adhere it to the bag body (2), and the upper portion of the bag body (2) is bonded to the bag body (2) with a gazette fold (1). ) (1) is folded inside, and the triangular rear piece (3c) is left along the straight edge (2a), and then the straight edge (2a) is replaced with the remaining triangular rear piece (3c). Powder which is characterized in that a blowing tape (6) is formed by a triangular front piece (3b) and a triangular rear piece (3c) which are sewn together with a sealing tape (4) and sewn with a sewing machine (5). A paper bag with a valve for body packaging.