JP4443189B2 - Paper bag with valve - Google Patents

Description

The present invention relates to a paper bag with a valve for containing powder such as wheat flour, buckwheat flour, and corn starch. More specifically, a paper tube valve is attached to the opening of a paper bag body, and the powder is passed through the paper tube valve. The present invention relates to a paper bag with a valve that allows a body to be accommodated in a paper bag body.

As shown in FIGS. 10 and 11, as a conventional paper bag, a paper tube a made of a multilayer paper material is flatly folded, and folded portions c and d are formed at both corners of an open end b of the paper tube a. The upper paper e and the lower paper f are folded so that one of the upper paper e and the lower paper f of the paper tube a is opened to form a development surface g and the opening h at the center of the development surface g is closed. Folding along the line i and pasting together, the decorative paper j is adhered and fixed from above, and the simplest shape constituting the bottom is known (the opening upper part has the same configuration). Further, as a technique in which a paper tube valve is attached to this conventional paper bag so that powder can be easily accommodated in the paper bag, a technique described in the following patent document is known.

Utility Model Registration No. 3046996 JP 2003-160144 A

As shown in FIGS. 12 and 13, the valve-attached paper bag of Patent Document 1 has a folded portion c of the development surface g described above.
, D is provided with a paper tube valve k, a heat-melt adhesive application surface is provided on the entire inner surface of the paper tube valve k, and slits m are provided at both ends of the powder passage L. The powder supply nozzle can be smoothly installed in the powder passage L, and after filling the paper bag with a valve through the paper tube valve k, the paper tube valve k is heated and heated to apply the paper tube valve k by the surface to which the molten adhesive is applied. The whole inner surface of the paper is adhered to seal the paper bag with valve.

As shown in FIG. 14, in the paper bag with a valve of Patent Document 2, a paper tube valve k1 is attached to one of the folding portions c and d of the development surface g described above, and the upper surface of the outer open end of the paper tube valve k1. Protrudes from the lower surface to form a protruding piece n, and a heat-melt adhesive application surface is provided on the inner surface side of the protruding piece n. After filling the paper bag with a valve through the paper tube valve k1, the protruding piece n Heated from the outer surface side, the heated melt adhesive application surface is adhered to the paper tube a, and the paper tube valve k1 is closed and the valved paper bag is sealed.

The valved paper bag of Patent Document 1 has slits m at both ends of the powder passage L of the paper tube valve k.
The powder passage L with the slit m becomes a free end, and even if there is residual powder on the powder passage L, it can be easily removed. There is an advantage that the entire inner surface of k can be adhered without hindrance and the paper bag with valve can be sealed. However, in order to manufacture the slitted paper tube valve k, it is necessary to fold the valve paper in three and bond the overlapped portions to form a flat tube shape, and further cut both folds to provide the slit m. Become. Therefore, the manufacture of the above-described paper tube valve k has a problem that the process must be complicated by three different processes of tri-folding, adhesion, and cutting.

Further, the valved paper bag of Patent Document 2 has a protruding piece n on the upper surface of the paper tube valve k1, and is heated after powder filling to bond the protruding piece n onto the paper tube a, so that the paper tube valve k1 is attached. Although the paper bag with the closing valve can be sealed to prevent the powder from leaking, these are in a fixed state, and the protruding piece n becomes an obstacle, so the bottom surface of the paper tube valve k1 and the paper-like shape after the powder filling. It is difficult to remove the powder remaining on the cylinder a. Therefore, there is a high risk that the residual powder will cause the valve paper bag to become insufficiently sealed and cause powder leakage. To prevent this, the remaining powder will have to be removed by taking time and effort. There is a problem in terms of simplification.

Therefore, the object of the present invention is to easily remove the powder remaining on the heat-melt adhesive application surface,
It is an object of the present invention to provide a paper bag with a valve that can be heat-melted and bonded without any trouble, can be sealed, has a simple structure without powder leakage, and is easily manufactured.

The present invention has been proposed in order to achieve the above object, and is characterized by having the following configuration.
That is, according to the present invention, the paper tube valve is mounted in the opening of the bag body, will powder through the paper tube valve as freely housed in the paper bag body, wherein the paper cylinder valve, one valve sheet It was formed by adhering, leaving at least one portion of the seam of Resona folded and stage cut, the non with this unbonded side outward attached to the opening, and the paper cylinder valve A valve-attached paper bag is provided in which a heat-melt adhesive application surface is formed on the inner peripheral surface on the bonding side .

In the paper bag with a valve of the present invention, the end portion of the valve paper which is the non-adhered side of the paper tube valve is completely free end, and it remains on it by opening or shaking the valve paper at the free end. Is removed, and then the heated melt adhesive application surface is heated to melt bond the paper tube valve and seal the paper bag body. It can be removed, heat-melted and bonded without any trouble, can be sealed, has no powder leakage, has a simple structure, and can reduce the manufacturing process of the paper tube valve.
And the non-adhered side of the paper tube valve has a free cut end, and the step formed on the outside of the paper bag body is opened or shaken to Residual powder can be removed, and then the heated melt adhesive application surface can be heated to melt bond the paper tube valve and seal the paper bag body. Therefore, when pulling out the powder supply nozzle from the paper tube valve, the stepped piece will block the passage and prevent the powder from flowing into the paper tube valve, reducing the amount of residual powder. I can do it .

  The best mode for carrying out the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a valved paper bag showing an embodiment of the present invention, FIG. 2 is a perspective view showing a production state of the valved paper bag, and FIG. 3 is a plan view showing a production state of the valved paper bag. In the drawing, the valved paper bag 1 has a paper tube valve 4 mounted in the opening 3 of the paper bag body 2, and the powder can be stored in the paper bag body 4 through the paper tube valve 4. The valve paper 6 is formed by adhering with at least one end of the joint left, attached to the opening 3 with the non-adhered side facing outward, and heated on the inner peripheral surface 4a of the paper tube valve 4 A melt adhesive application surface is formed.

As shown in FIG. 2, the paper bag body 2 folds a paper tube 11 made of a multi-layered paper material 10 flat, and folds into both corners 12 a and 12 b of one open end 12 of the paper tube 11. 13, 1
4, one of the upper paper 15 and the lower paper 15a is opened to form a development surface 16, and the upper paper 15 and the lower paper 15a have folding lines 17 so as to close the opening 3 of the development paper 16. 17, the upper paper 15 and the lower paper 15 a are folded and bonded along the folding lines 17, 17, and the decorative paper 18 is further bonded thereon to form a bottom portion.

As the paper tube 11, any diameter and length are selected according to the purpose of use, and FIG.
2, the two-layered paper-like material 10 having the outer-layer paper-like material 20 and the inner-layer paper-like material 21 is used. However, the invention is not limited to this, and a multilayer of three or more layers may be used. The material is not limited to kraft paper, but may be a laminate of paper and plastic film.

Then, the paper tube 11 is flatly folded as shown in FIG. 2, bent in the direction of the arrow A along the crease line 22, and as shown in FIG. 3, at both corners 12a and 12b of the opening end portion 12. Triangular folding portions 13 and 14 are formed, and the upper paper 15 side of the paper tube 11 is opened to form a hexagonal development surface 16.
Form. Since the development surface 16 has the opening 3 at the center, it is necessary to bend the upper paper 15 and the lower paper 15a toward the opening 3 in order to close the opening 3. Therefore, the bending muscle 1
7 and 17 are attached to the upper paper 15 and the lower paper 15a, and the upper paper 15 along the fold lines 17 and 17 are attached.
And the lower paper 15a are folded, and at least the hatched portions 23 and 23 of the upper paper 15 and the lower paper 15a.
A paste is applied and pasted on a. In addition, it does not specifically limit as this bonding agent, Usually, what was chosen from adhesive agents, such as polyvinyl acetate, polyvinyl alcohol, an acryl type, rubber type, starch paste, is used suitably.

Then, the decorative paper 18 is pasted on the upper paper 15 and the lower paper 15a after the paper tube valve 4 is attached to the opening 3 of the paper bag body 2 to obtain a product (see FIG. 6). Therefore, FIG.
In this state, it is handed over to the customer as the valved paper bag 1, and after the powder is stored in the valved paper bag 1 by the customer, the heating and melt adhesive application surface 5 of the paper tube valve 4 is pressed and heated by a heater. Then, the paper tube valve 4 is completely sealed. 1 and 3, one side of the decorative paper 18 is preliminarily pasted on the back surface of the lower paper 15 a of the development surface 16. However, the decorative paper 18 is handed over separately and all subsequent work is performed by the customer. May be.
Further, as shown in FIG. 1, the other open end 12A of the paper tube 11 shown in FIG. 2 has no paper tube valve 4 and decorative paper as compared with the one open end 12 described above. 18 is substantially the same except that the cut tape 26 is attached to the upper portion 18 to form the upper opening portion.

8 and 9 show the configuration of the paper tube valve of the present invention . The feature of the paper tube valve is that the paper tube valve 4B cuts one valve paper 32 as shown in FIG. The valve paper 32 is folded in the direction of the arrow B and formed so that at least one end of the joint 33 is left, so that the stepped pieces 34 and 35 become complete free ends, and the end 32a is on one side. Is a free end, and further, the heat-melt adhesive application surfaces 5a and 5b are formed on the stepped piece 34 and the end portion 32a. Accordingly, the stepped piece 34 of the complete free end and one side can open or shake the side end portion 32a of the free end, so that the powder remaining on it can be easily removed, and then the surface to which the heated melt adhesive is applied If 5a and 5b are heated, the heat-melt adhesive application surfaces 5a and 5b are heat-melted and bonded, and the paper tube valve 4B can be immediately closed. The step-cut piece 35 closes the passage of the paper tube valve 4B when the powder supply nozzle is pulled out from the paper tube valve 4B, suppresses the back flow of the powder, prevents the powder from entering the paper tube valve 4B, The amount of residual powder can be reduced. Therefore, the paper tube valve 4B of the valved paper bag 1b is advantageous particularly in that the backflow of the powder is suppressed and the amount of the residual powder can be reduced .

As mentioned above, although Example 1, 2, and 3 of this invention were demonstrated, a specific structure is not limited to this, For example, two valve | bulb of Example 1 can be changed in the range which does not deviate from the summary of this invention. It should be understood that it is possible to shift the paper as in Example 3 as appropriate.

The valve-attached paper bag of the present invention has extremely high applicability when it is strongly required to easily eliminate powder leakage caused by residual powder during heat-melt bonding.

It is a perspective view of a paper bag with a valve which shows an embodiment of the invention . It is a perspective view which shows the manufacture state of the paper bag with the valve. It is a top view which shows the manufacture state of the paper bag with the valve. It is a perspective view which shows the finishing state of the paper bag with a valve. It is a perspective view of the paper bag with a valve which shows the wearing state of the paper tube valve of the present invention. It is an expanded view of the valve paper which comprises the paper cylinder valve of a paper bag with a valve same as the above. It is a top view which shows the example of the conventional paper bag. It is a top view which shows the example of the conventional paper bag. It is a top view which shows the example of the conventional paper bag shown in patent document 1. FIG. It is a top view which shows the example of the conventional paper bag shown in patent document 1. FIG. It is a top view which shows the example of the conventional paper bag shown in patent document 2. FIG .

Explanation of symbols

1, 1a, 1b Paper bag with valve 2 Paper bag body 3, h Opening 4, 4A, 4B, k, k1 Paper cylinder valve 4a Inner peripheral surface 5, 5a, 5b Heat-melt adhesive application surface 6, 24, 25, 30 , 32 Valve paper 7, 31, 33 Seam 10 Paper-like material 11, a Paper-like tube
12a, 12b corner 13, 14, c, d folding part 14a apex angle 14b base 15, e upper paper 15a, f lower paper 16, g unfolding surface 17, 22, i-folded line 18, j decorative paper 20 outer layer paper-like material 21 Inner layer paper-like material 23, 23a Shaded portions 24a, 25a, 30a, 30b,
32a end
26 Cut tape 34, 35 Stepped piece L Powder passage m Slit n Protruding piece

Claims (1)

A paper tube valve is attached to the opening of the paper bag main body, and powder can be stored in the paper bag main body through the paper tube valve. The paper tube valve cuts and stacks a single sheet of valve paper. At least one end of the seam of the seam is adhered and formed, the non-adhered side is attached outward to the opening, and the inner peripheral surface of the paper tube valve is heated to the non-adhered side A valved paper bag having a surface coated with a molten adhesive.

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