JPS6025403Y2 - packaging bag - Google Patents

Description

[Detailed description of the invention] The present invention is a packaging bag manufactured by the side seal method, more specifically, one of the two sheets constituting the bag is extended as appropriate from the opening of the bag to cover the bag. A bag that has one piece and is configured so that the opening can be opened and closed by folding the lid piece back to the outer surface of the other sheet, and the bag is manufactured using the side seal method with the lid piece folded back in advance. It is related to.

When a bag manufactured by the side seal method is provided with a lid that can be opened and closed, conventionally, one of the two sheets constituting the bag body is appropriately extended beyond the opening to form the lid piece. An adhesive layer with release paper is formed on this lid piece.
Therefore, after filling the bag with products, the release paper is peeled off and the lid piece is folded back onto the packaging body to close the bag.

However, with products like this where the release paper is removed and sealed manually, there is a problem in that it takes time to fill the bag, and if the bag is deformed by placing the product in it, it may not be possible to seal it neatly. was there.

Therefore, the upper and lower ends of the book binding bag are opened, the lid piece is folded back and sealed in advance in the upper opening, the product is sealed through the lower opening, and the lower opening is heat-sealed. The above-mentioned problem is being addressed by the following.

However, when manufacturing a bag with the lid piece folded back against the main body using the side seal method, in order to make the lid piece openable and closable after manufacturing, it is necessary to Some means must be taken to prevent the lid piece and the main body from being fused together.2 As a means for preventing heat fusion in the side seal method, for example,
As disclosed in Publication No. 614 and Publication No. 54-2516, mold release agents such as silicone are applied. It is difficult to apply evenly, the rate of defective products is high due to uneven coating, manufacturing efficiency is low because it cannot be applied at high speed, and it is difficult to dry the applied mold release agent. There were disadvantages such as requiring a process and complicating the process.

The present invention focuses on the fact that in soft synthetic resin sheets, there is no heat fusion between stretched sheets and unstretched sheets, or between sheets made of different materials. A stretched sheet or a different material is inserted between the book binding bag formed of the sheet and the lid piece to prevent heat fusion between the lid piece and the book binding bag. It is something.

Next, the present invention will be explained based on the drawings. In the drawings, 1 is a packaging bag made of a thin sheet made of synthetic resin such as polyethylene, polypropylene, nylon, etc., with a front plate 2' and a back plate. 3 uses a thin sheet of unstretched film, and seals the left and right edges 4, 4 of the front plate 2 and the back plate 3 by heat-sealing, respectively.

As a result, openings are formed in the bag 1 at both upper and lower ends.

One end of the back plate 3 is dimensioned 11 from the upper edge 5 of the front plate 2.
A lid piece part 6 is integrally extended to surround the opening.

A knob piece 8 formed by stretching a film of material opposite to the surface plate 2, separated by an appropriate distance p□ from the upper edge 7 of this lid piece part 6.
is positioned parallel to the opening, and the knob piece 8 and the lid piece part 6
A single-sided adhesive tape 9 with a width H2 is applied to the back side of both sides.
to connect the knob piece 8 and the lid piece part 6.

Furthermore, when providing an intervening tape 10 made of a stretched film of the same material as the surface plate 2 on the front side of the lid piece 6, the end of the intervening tape 1p is pasted over the upper edge 7 of the lid piece 6. The adhesive tape 9 is polymerized to adhere to the adhesive tape 9 by a width H3, while the other end of the intervening tape 10 is extended to the vicinity of the upper edge 5 of the surface plate 2, and is provided along the opening of the bag. As a result, an exposed adhesive band portion 11 having a width of (H1H3) is formed.

゛ □'°゛Fold back the knob piece 8 and the lid piece part 6 with the intervening tape 10 to the surface side of the surface plate 2 to seal the opening.In this state, fold the knob piece 8 and the lid piece part with the intervening tape 10 The right and left ends of the bag 6 and the left and right end edges 4, 4 of the bag are overlapped and heat-sealed.

As a result, the bag body 1 with the tip opening closed as shown in FIG. Since the lid piece 6 and the tab piece 8 are connected via the adhesive tape 9, the tip opening can be opened and closed simply by peeling off or attaching the adhesive tape 9 using the tab piece 8.

In order to continuously create such a bag body 1, first, a lid piece 6 with a length of 1□ and a tongue piece 12 with a length of 13 are integrally attached to the upper part of the back plate 3 with a length of 1□. An unstretched elongated sheet 13 is stretched in the longitudinal direction, and one end of the elongated sheet 13 (corresponding to the upper edge 7 of the lid piece 6) is stretched at an appropriate distance H0. Run the processed long sheet 8' for the knob 8 in parallel; one-sided adhesive tape 9 is run parallel to the longitudinal direction from the back side between both 8' and 13', and the ends of the back sides of both 8' and 13' are Paste.

Furthermore, an intervening tape 10 stretched from the surface side is run on one end side of the long sheet 13, and the intervening tape 10 is overlapped by a width H3 with respect to the single-sided adhesive tape 9.
Attach the back side of the tape to the adhesive band 11 of the single-sided adhesive tape 9.

Next, on the front side of the elongated sheet 13, an unstretched elongated sheet 14 corresponding to the surface plate 2 having a length of 1□ is run along the lower end and edge 15 of the intervening tape 10, while The sheet 13 is folded back along the vicinity of the lower edge 15 of the intervening tape 10 toward the surface side of the long sheet 14 for the surface plate, and the adhesive band 1 is exposed on the single-sided adhesive tape 9.
1 is adhered to the surface side of the long sheet 14.
If these long sheets 13 and 14 are heat-sealed at an appropriate interval H4 in the flow and straightening directions, and cut S at the time of the number and the decoy, 1.9 will be cut along the left and right edges 4.4 of the body 1. At the same time, the front plate 2 and the back plate 3 are heat-sealed, and at the same time, the folded lid piece 6 is placed between the front plate 2 and the cover plate 2, which has a different lid. Since the intervening tape 10 is loosely interposed, the knob piece 8 and the top plate 2, and the intervening tape 10 and the top plate 2 are only temporarily bonded to each other at the heat-melting chopstick location, and are easily peeled off.

A bottom opening is formed between the front and back plates 2 and 3 on the side having the tongue piece 12 in the bag made in this way, so that articles can be put therein and then sealed by heat sealing. .

Note that even if sheets of different materials are used, such as polyethylene for the front plate 2 and back plate 3, and polypropylene for the knob piece 8 and 1 intervening tape 10, the front plate 2 and the knob piece 8 can be made in the same manner as described above. Alternatively, it becomes difficult to heat-seal the intervening tape 10.

As described above, in the present invention, when forming a bag with a closed lid in advance, instead of applying a release agent such as silicone as in the past as a means of preventing heat fusion, the present invention This method prevents heat fusion by inserting sheets of different types, so during the manufacturing process, simply feeding out these different types of sheets continuously can result in high speed and defective products. This allows for improved productivity.

In this case, the packaging body is made of inexpensive unstretched sheets, and the amount of expensive stretched sheets used is small.
The price of the bag can also be kept low.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of the bag;
Figure 2 is a plan view showing the manufacturing process of the bag, Figure 3 is an enlarged partially cutaway sectional view taken along the line ■-■ in Figure 2, and Figure 4 is a T in Figure 2.
It is a partially cutaway enlarged sectional view taken along the line V-IV. 1...Bag body, 2...Surface plate, 3...
... Back plate, 6... Lid piece, 9...
Single-sided adhesive tape, end...pick piece, 10...
・Intervening tape.

Claims (1)

[Scope of utility model registration request] A front plate and a back plate made of unstretched soft synthetic resin sheets are overlapped, and the left and right edges of both plates are heat-sealed and simultaneously heat-sealed to form a mounting body with upper and lower openings, and the back plate is In this case, in a bag formed by extending a lid piece that is folded back to the surface of the top plate at the upper end opening of the bag, a stretching process is applied to a part of the back plate that is spaced by an appropriate distance from the tip edge of the lid piece. A tab piece made from a sheet □ or a sheet different from the double-sided board is arranged, and the tab piece and the lid piece are connected via a single-sided adhesive tape stuck from both back sides thereof, A part of the adhesive part of the adhesive tape and the surface side of the lid piece part,
An intervening tape '1 made of a stretched sheet or a sheet different from the double-sided plate is covered with a trowel, and the lid piece is folded back in advance so that the juice, the adhesive tape, and the intervening tape overlap on the surface of the top plate. A packaging bag made of