JPH0728845U - Injection valve device for powder packaging paper bag - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain an injection valve device for a powder packaging paper bag which can surely seal the pressure-sensitive adhesive layer applied to the injection valve cylinder without adhering the powder. [Structure] A tip of a release paper covering the surface of a pressure-sensitive adhesive layer for closing the injection valve cylinder is bent and folded on the adhesive layer.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an injection valve device for a powder packaging paper bag in which powder is stored in a bag via an injection valve cylinder and then the mouth of the injection valve cylinder is sealed with a pressure sensitive adhesive.

[0002]

[Prior art]

 In this type of powder packaging paper bag, when the powder is injected from the injection valve cylinder, the powder adheres to the surface of the pressure-sensitive adhesive applied to the inner peripheral surface of the injection valve cylinder. Reliable sealing of the mouth was extremely difficult.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to provide an injection valve device in which powder does not adhere to the surface of the pressure-sensitive adhesive applied to the inner peripheral surface of the injection valve cylinder, and the release paper can be easily peeled off and closed and sealed. It is in.

[0004]

[Means for Solving the Problems]

 The means of the present invention are as follows. In a powder packaging paper bag in which the injection valve cylinder is mounted and projected at one end of the bag body and a pressure-sensitive adhesive is applied to the inner peripheral surface of the mouth of the injection valve cylinder, a release paper covering the surface of the pressure-sensitive adhesive layer or An injection valve device characterized in that the tip of a synthetic resin film is bent, folded over the adhesive layer, and projected outward from the mouth of the injection valve cylinder.

[0005]

[Action]

 When the tip of the release paper is pulled toward you, the release paper 4 adhered to the pressure-sensitive adhesive layer 3 is gradually peeled off from the fold 4a, so the release paper 4 is easily peeled off, and the release valve cylinder Can seal the mouth.

[0006]

Embodiment 1 In FIGS. 1 and 2, reference numeral 1 is a paper bag which is folded in a left-right triangular shape at both ends and the pieces a and b between the two triangular folding portions are folded to insert and fix the injection valve cylinder 2, and the decorative paper C is attached. To do. As shown in FIG. 3, the injection valve cylinder 2 is provided with an adhesive layer 2b at its end in order to form a single valve paper 2a into a cylindrical shape, and when the valve cylinder 2 is formed, a feeling of sealing its mouth is provided. The pressure-sensitive adhesive layer 3 is applied, and the release paper 4 shown in FIG. 4 (a synthetic resin film may be used) is adhered to the pressure-sensitive adhesive layer 3. The release paper 4 is folded above the fold 4a so as to project toward the front, and in that state, the release paper 4 is folded over the crease lines 5 and 6 indicated by chain lines to bond the adhesive layer 3 to form the injection valve cylinder 2. , Release paper 4 is projected beyond that.

[0007]

[Effect of device]

 Since the present invention is configured as described above, when the release paper 4 is pulled as shown in FIG. 5, the fold position is gradually moved and peeled off, so that the pressure-sensitive adhesive layer 3 can be easily exposed, and immediately. The mouth of the injection valve cylinder 2 can be closed and sealed. Therefore, unlike the conventional case, the powder does not adhere to the surface of the pressure-sensitive adhesive layer during powder injection, and the mouth of the injection valve cylinder can be reliably sealed.

[Brief description of drawings]

1 is a plan view

FIG. 2 is a perspective view showing a usage state.

FIG. 3 is an exploded perspective view of an injection valve cylinder.

FIG. 4 is a developed perspective view of an injection valve cylinder to which release paper is adhered.

5 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Paper bag 2 Injection valve cylinder 3 Pressure-sensitive adhesive layer 4 Release paper

Claims (1)

[Scope of utility model registration request] 1. An injection valve cylinder is attached to one end of the bag body so as to protrude.
In a powder packaging paper bag in which a pressure sensitive adhesive is applied to the inner peripheral surface of the mouth of the injection valve cylinder, an adhesive layer is formed by bending the tip of a release paper or synthetic resin film covering the surface of the pressure sensitive adhesive layer. An injection valve device, characterized in that it is folded over and is projected outward from the mouth of the injection valve cylinder.