JPH0568846U - Bag with valve - Google Patents

Abstract

(57) [Summary] [Purpose] Minimize the flow of powder or granules, which are the contents, out of the bag. [Constitution] In a bag with a valve in which a cut 20 is provided in a part of a bag body 15 made of a non-breathable material and the cut 20 is covered with a valve piece, the valve piece 31 is a filter having air permeability and heat sealability. It is characterized by being made of wood.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bag with a valve for storing powder or granules (for example, fertilizer). In particular, it relates to a bag with a valve capable of minimizing the outflow of powder or granules to the outside of the bag.

[0002]

[Prior Art]

 As a conventional bag with a valve, those shown in FIGS. 3 to 5 are known.

This device has a structure in which a cut 20 is provided in a part of a bag body 10 made of a material having no air permeability (for example, polyethylene), and the cut 20 is covered with a valve piece 30 made of the same material as the bag body. ing.

In this bag with a valve, as shown in FIG. 6, a lower edge portion 11a of a tubular body 11 made of a polyethylene sheet is first heat-sealed (the heat-sealed portion is shown by diagonal lines throughout the drawings). ), And then the cut 20 is formed in the upper part. After that, while heat-sealing the upper edge portion 11b (portion indicated by an imaginary line) of the tubular body 11, cover the cut portion 20 with a valve piece 30, and heat-seal in a "U" shape as shown in FIG. Manufactured by.

In order to fill such a bag with a valve with a powdery or granular content, as shown in FIGS. 3 and 4, the filling nozzle N is connected to the valve piece 30 and the bag body 10. The contents C are inserted by inserting the cut 20 through the space and borrowing the force of the air A flowing out into the bag through the nozzle.

[0006]

[Problems to be solved by the device]

 In the bag with a valve as described above, when the content C is filled with the nozzle N, the air A is also filled together with the content. Therefore, when the nozzle N is pulled out from the bag after filling the content, the looseness from the cut 20 is loosened. There is a blowback.

In the conventional bag with a valve, the valve piece 30 is made of a material that is not breathable, so that the air A1 in the bag is cut from the cut piece 20 to the bag piece 30 as shown by a broken arrow in FIG. It had flowed out between the main body 10 and the outside of the bag. Therefore, there is a problem that a part of the contents once filled in the bag flows out of the bag together with the air A1 and pollutes the inside of the filling factory.

Therefore, in order to solve this problem, at present, as shown in FIG. 3, the bag body 10 is filled with pores (for example, holes formed by piercing with a needle-shaped body) 12 to fill the bag. However, if the diameter of the pores 12 is increased, the amount of contents leaking out of the bag through these pores increases, so the diameter of the pores must be reduced. However, it has not been effective enough to prevent blowback. Also, no matter how small the diameter of the pores 12 is, since the contents are powder or granules, there is no change in that leaks occur, which causes not only the inside of the factory but also the distribution channels to be polluted. Is becoming.

An object of the present invention is to solve the above problems and to provide a bag with a valve capable of minimizing the content of powder or granules flowing out of the bag. is there.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a valve bag in which a cut portion is provided in a part of a bag body made of a non-breathable material, and the cut portion is covered with a valve piece. It is characterized by being composed of a filter material having properties.

[0011]

[Operation effect]

 Since the present invention has the above-mentioned configuration, it has the following operational effects.

That is, in the valve-equipped bag of the present invention, the cut end is covered with the valve piece made of the air-permeable filter material, so that after filling the contents, the filling nozzle is removed from the bag. Most of the air generated by gentle blowback from the cut end passes through the valve piece and flows out of the bag. Therefore, most of the contents that try to flow out of the bag together with the air will be filtered by the valve piece and will not flow out of the bag.

As described above, according to the present invention, it is possible to minimize the content of powder or granules flowing out of the bag, and to eliminate the need for conventional pores. The effect that the inside and the distribution route are not contaminated can be obtained.

[0014]

【Example】

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

FIG. 1 is a front view showing an embodiment of a bag with a valve according to the present invention, and FIG. 2 is an end view of II-II in FIG. In these figures, the same parts as those of the conventional one are designated by the same reference numerals.

In FIG. 1, reference numeral 31 denotes a valve piece, which is made of a filter material having air permeability and heat sealability. For example, it is made of polyethylene nonwoven fabric.

The valve piece 31 is attached by a heat seal so as to cover the cut 20 of the bag body 15 as in the conventional case. The bag body 15 has no pores.

Since the cut end 20 of such a bag with a valve is covered with a valve piece 31 made of a filter material having air permeability, after the content C is filled, the filling nozzle N is removed from the bag. Most of the air A1 generated by the gentle blow-back from the cut 20 after being pulled out passes through the valve piece 31 and flows out of the bag, as shown by the broken line arrow in FIG. Therefore, most of the contents that try to flow out of the bag together with the air A1 will be filtered by the valve piece 31, and will not flow out of the bag.

If the valve piece 31 is made of a material having the same flexibility as that of the bag body 15, the adhesion between the valve piece 31 and the bag body 15 is improved, and the outflow of the contents is further improved. Can be prevented.

As described above, according to the valve-equipped bag of the present embodiment, it is possible to minimize the content of powder or granules flowing out of the bag and to eliminate the need for conventional pores. As a result, the inside of the factory and distribution channels will not get dirty.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be appropriately made within the scope of the present invention.

For example, the valve piece 31 is not limited to polyethylene non-woven fabric, and may be any filter material having air permeability and heat sealability. When a gap is created between the valve piece 31 and the bag body 15 due to the difference in flexibility, the opening edge of the valve piece 31 (the right side edge in FIG. 1) is heated after filling the contents. It may be sealed and sealed.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a bag with a valve according to the present invention.

FIG. 2 is an end view of II-II in FIG.

FIG. 3 is a front view showing a conventional bag with a valve.

FIG. 4 is an end view of IV-IV in FIG.

5 is IV-IV when the nozzle in FIG. 3 is pulled out.
End view.

FIG. 6 is a perspective view for explaining the manufacture of the bag with the valve.

[Explanation of symbols]

 15 bag body 20 cut 31 valve piece

Claims (1)

[Scope of utility model registration request] 1. A bag with a valve in which a cut is provided in a part of a bag body made of a non-breathable material and the cut is covered with a valve piece, wherein the valve piece is made of a filter material having air permeability and heat sealability. A bag with a valve characterized by being configured.