JPS5899353A - Injection hole valve for paper bag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention - acts as an injection hole during injection, and after injection acts as a valve that seals the injection hole by the internal pressure of the powder or granules themselves packed in the paper bag; Concerning injection hole valves for paper bags.

Conventionally, this type of injection hole valve uses paper laminated with polyethylene on the inner surface or paper coated with hot melt, as shown in FIG. A backing paper part 3 having a curved notch 3ayff: formed back sealing glue margin 3b is provided on one side of the backing paper part 3 via the folding line 2, and a folding line 2 is further provided on the other side of the backing paper part 3. The horizontal adhesive portion 4 is attached to one end of the hole valve body, which is pasted on the inner surface of the cover portion 1, through the front sealing adhesive portion 1a and the back sealing adhesive portion 3b. As shown in FIG.
, 6b, and is attached to the opening with one end open, and powder or granules are removed from the hole valve main body A having a hole lower consisting of a front sealing adhesive margin 1a and a back sealing adhesive margin 3b. Then, the injection hole valve is sealed by the internal pressure of the powder or granules itself packed into the paper bag 5, and in order to ensure this sealing, one end of the petal body A is sealed. The front sealing adhesive margin 1a and the back sealing adhesive margin 3b, which are the holes provided, are joined by full heat welding to form a double sealing adhesive margin 8, and this is attached to the backing paper portion 3 side, That is, it is partially attached to the backing paper part 3 at the curved notch part 3a which is bent toward the petal body A side and heat-welded to expose the polyethylene laminate or hot melt coating surface. There is.

Alternatively, as shown in FIG. 3, the opening at one end of the paper bag 5, which is sealed with both sealing paper pieces 6a and 6b, can be used as the injection hole valve without providing a new injection hole valve. After filling the metal with powder or granular gold, the outside of the metal is pasted with reinforcing paper 9, which has a hot-melt layer (9a) attached to the edge.

In the former case, the sealing adhesive margin 8 is double-layered to provide a strong sealing adhesive margin, but the curved cut portion 3 where the sealing adhesive margin 8t-, polyethylene laminate, or hot melt is exposed
Since it is partially attached to the backing paper part 3 in step a, sufficient sealing strength and adhesive strength cannot be obtained. In addition, the sealing adhesive portion 8
Since there is no crease line, it is difficult to bend, cannot be accurately and easily bent, and cannot be sealed quickly. Moreover, it is necessary to form a curved notch 3a in the back sealing adhesive margin 3b, which makes cutting difficult.
It cannot be manufactured easily.

On the other hand, in the latter case, the opening itself at one end sealed with both sealing paper strips 6a and 6b is used as the injection hole valve, and the reinforcing paper 9 is simply pasted there, so it may seem simple at first glance. , it is necessary to apply hot melt) 9a to the end of the reinforcing paper 9 in advance and further harden it, and after injection, it is necessary to apply heat from the outside of the reinforcing paper 9 and press it. Therefore, it is easy to manufacture. I can't do it, and I can't increase my speed. Moreover, since the opening itself at one end sealed with both sealing paper pieces 6a and 6b is used as the injection hole valve, when powder or granules are injected into the paper bag, the powder around the hole of the injection hole valve is used. Otherwise, particles may adhere to the reinforcing paper 9, and even if the reinforcing paper 9 is applied over the entire surface, sufficient sealing strength and adhesive strength cannot be obtained. former,
Both of the latter require large equipment for heat treatment and pasting after injection, and high-speed operation is not possible.

The present invention has been made in view of the above, and aims to provide an injection hole valve for a paper bag that can obtain sufficient sealing strength and pasting strength, can be quickly sealed, and can be manufactured easily. This is the purpose.

The injection hole valve of the paper bag according to the present invention is cut in one side of the cover part having the front sealing adhesive part at one end, at the boundary between the back sealing adhesive part and the main body of the back paper part, through a fold line. A backing paper section with a line is provided,
A horizontal adhesive margin is provided on the other side of the backing paper section via a fold line, and the horizontal adhesive margin is pasted on the inner surface of the cover section, and a front sealing adhesive margin and a back sealing adhesive margin are attached. The petal body is pasted to form a petal body with the cut line as the opening, and a double sealing adhesive area consisting of a front sealing adhesive area and a back sealing adhesive area is attached to one end of the petal body. This is characterized in that the sealing adhesive margin is bent toward the backing paper section and pasted on the entire surface, and will be explained in detail below with reference to the drawings.

FIGS. 4 and 5 show an embodiment of the injection hole valve according to the present invention.

The cover section 10 is a quadrilateral paper section with a front sealing adhesive section 1 at one end.
11. A backing paper section 13 is provided on one side of the cover section 10 via a fold line 12. The back paper section 13 consists of a back sealing adhesive section 14 and a back paper section main body 15, including a back sealing glue section,
A score line 16 is provided at the boundary between the paper backing section 14 and the backing paper section main body 15. The backing paper portion 13 is further provided with a horizontal glue margin portion 1 via the fold line 12.
7 is provided. Then, as shown in FIG.
is pasted on the inner surface of the petal to form a petal body B with the cut line 16 as the opening.
and paste it on one end of the petal body B.
It has a structure in which a double sealing adhesive margin 18 consisting of a back sealing adhesive margin 14 and a back sealing adhesive margin 14 is provided.

The injection hole valve of the present invention has such a structure, and as shown in FIG. It is attached between the backing paper part 20 and the vertical gluing margin part 23 of a paper bag 24 composed of 23.

When packing powder or granules into the paper bag 24, the powder or granules are injected together with air from the hole valve main body B, which has the cut line 16 of this injection hole valve as the hole opening, and is packed into the paper bag 24. . After filling, the injection hole valve is pressed and sealed by the internal pressure of the powder or granules themselves. After that, in order to completely ensure this sealing, as shown in FIG.
8, the sealing glue margin 181Fl is bent along the cut line 16 and pasted on the petal body B. Alternatively, as shown in FIG. 8, the outside of the sealing adhesive portion 18 is directly pasted with tape 25 to completely seal it.

This sealing ensures the sealing of the paper bag 24 and prevents spillage of powder or granules from the paper bag 24 during transportation or handling.

The above-mentioned sealing adhesive portion 18 can be sealed by doubling the sealing adhesive portion 18 and pasting the sealing adhesive portion 18′f on the entire surface of the hole valve body B to ensure sufficient sealing. Strength and adhesive strength can be obtained. Of course, since the powder or granules are injected through the petal body B, which has the incision line 16 as the opening, the powder or granules will not adhere to the area around the injection hole valve. The adhesive portion 18 adheres well to the petal main body B, providing greater sealing strength and adhesive strength.

In addition, the folding of sealing glue margin] 8 is done at the back sealing glue margin 14.
If it is folded along the cut line 16 provided at the boundary between the backing paper section main body 15, it can be easily and accurately folded with one hand. Sealing can also be done quickly.

When manufacturing the above injection hole valve, cut the back sealing glue allowance 1.
4 and the backing paper portion main bodies 1 and 5 are simply cut at the boundary line, so it can be manufactured easily. Since it is only necessary to cut the boundary line between the back sealing adhesive margin 14 and the back paper main body 15 in a straight line, cutting is easy, and therefore manufacturing is simple.

FIG. 9 shows a case where the injection hole valve of the present invention is attached to another paper bag.

In this case, the top and bottom are both sealed paper pieces 26a, 26b.
This is an example in which an injection hole valve is horizontally attached to the top of a paper bag 27 that is folded and sealed.

In this case as well, the powder or granules are packed into the paper bag 27,
Sealing can be ensured by bending the sealing adhesive portion 1st along the cut line 16 and pasting the sealing adhesive portion 18 on the petal body B side. Naturally, in this case as well, by bending the sealing adhesive margin 18 along the score line 16, it can be accurately and easily bent and sealed quickly. Of course, since the double sealing adhesive margin 18t-1 is fully affixed to the side of the valve main body B, the sealing strength and the strength with the affixing are sufficient.

FIGS. 10 and 11 show other embodiments of the injection hole valve according to the present invention.

That is, the cover portion 28 is a cover portion having a vertically elongated front sealing adhesive portion 29 at one end and a support portion 30 integrally provided on one side portion,
A backing paper section 13 is provided on the other side of the cover section 28 via the fold line 12 in the same way as in the embodiment described above, and the back sealing adhesive margin 1 of the backing paper section 13 is
A cut line 16 is formed at the boundary between the backing paper section main body 15 and the backing paper section 15, and a lateral movement section 17 is formed on the other side of the backing section 13 via the fold line 12.
As shown in FIG. Attach the substitute part 29 and the back sealing glue part 14 to one end of the petal body B,
It has a structure in which a portion of the front sealing adhesive portion 29 and the back sealing adhesive portion 14 is provided with a double-k sealing adhesive portion 31.

In this case as well, the same effects as the injection hole valve of the embodiment described above can be obtained. In this case, the cover section is provided with the supporting section 301 on the entire side of the cover section 28, so that when the injection hole valve is attached to the paper bag, the attachment strength is increased. be.

In addition, in order to easily seal the injection hole valve, the 12th
As shown in the figure, it is also possible to seal without bending the sealing adhesive portion 18 by applying hot melt 32 onto the score line 16.

As explained above, in the present invention, the sealing adhesive portion is doubled and the sealing adhesive portion is fully attached to the petal body, so that sufficient sealing strength and adhesive strength can be obtained. . Moreover, since the powder or granules are injected through the petal body with the incision line as the opening, the powder or granules will not adhere to the area around the injection hole valve. There are no adhesion defects, and the adhesive can be applied reliably, providing even more sufficient sealing strength and adhesion strength, and will never come off. In addition, since a cut line is formed at the boundary between the back sealing glue margin and the backing paper main body, it is possible to fold the sealing glue margin along the cut line when sealing. , can be folded accurately and easily, and can be sealed quickly. Moreover, when manufacturing the injection hole valve, the cutting process is simply a straight cut at the boundary line between the back sealing adhesive margin and the main body of the backing paper, which simplifies the manufacturing process. The technical effects of the invention are enormous.

[Brief explanation of drawings]

Fig. 1 is an exploded view of a conventional injection hole valve, and Figs. 2 and 3 are plan views of the entire paper bag showing conventional examples (Fig. 3 shows a state in which the reinforcing paper is partially opened). ), FIGS. 4 and 5 show an embodiment of the injection port valve according to the present invention, FIG. 4 is a developed view thereof, FIG. 5 is a plan view thereof, and FIG. 6 is a Fig. 5 is a plan view of the entire paper bag with the injection hole valve attached to the paper bag, Fig. 7 is a perspective view of the main part showing the sealing area with glue applied and pasted, and Fig. 8 is the injection hole valve. FIG. 9 is a plan view of the entire paper bag with the valve sealed. FIG. 9 is a plan view of the entire paper bag of another example in which the injection hole valve of FIG. 5 is attached to another paper bag. Another embodiment of the injection hole valve according to the invention is shown, FIG. 10 is a developed view thereof, FIG. 11 is a plan view thereof,
FIG. 12 is a perspective view of essential parts showing another sealing method for sealing the injection hole valve. 1, 10, 28--Cover section, 18, 11129
-...Front sealing glue margin, 2.12...Fold line, 3.13.
...Backing paper section, 3b, 14...Back sealing adhesive section, 4.17
...Horizontal glue allowance, 5,24.27...Paper bag, 8,18
．． 31...Sealing glue allowance part, 15...Backing paper part main body, 16
... Cut line, 30 ... Support part, A, B ... Petal body. Patent applicant: Nippon Flour Mills Co., Ltd. Kujiraoka Seifuku Co., Ltd. Figure 3 Figure 4 Figure 8 Figure 9 Figure 10 Figure 7 Figure 12

Claims (2)

[Claims] (1) On one side of the cover part which has a front sealing adhesive margin at one end, attach a backing paper part having a cut line at the boundary between the back sealing adhesive margin and the main body of the backing paper part through a fold line. A horizontal adhesive margin is provided on the other side of the backing paper section via a fold line, and the horizontal adhesive margin is pasted on the inner surface of the cover section, and a front sealing adhesive margin and a back sealing adhesive margin are attached. At the same time, a double hole valve body consisting of a front sealing adhesive margin and a back sealing adhesive margin is attached to one end of the hole valve main body. 1. An injection hole valve for a paper bag, characterized in that a sealing adhesive margin is provided, and the sealing adhesive margin is bent toward the backing paper section and pasted on the entire surface. (2) The paper bag injector according to claim 1, characterized in that the cover portion is provided with a support portion on the other side.