JPH0322296B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of manufacturing a printed bag.

(Prior art and its problems) Conventionally, as shown in Fig. 4, transparent resin film A has been used as a bag for storing clothing, etc. during the product distribution process.
Product name, size C on the inner and/or outer surface of
etc. are continuously gravure printed to form a printing band B,
As shown in FIG. 5, this printed band B is folded back at approximately the center in the width direction, and both ends are cut by fusing to match the printed area C, which has been put into practical use.

By the way, even if the printed portion C is strip-shaped and has an extremely small area compared to the entire bag, the bag E must be longer than the printing strip B as shown in FIG. Since a gravure printing roll D is required, the plate cost is high. Note that D′ is the printing plate portion.

Moreover, when storing a large amount of bags E, there is a problem in that a large space is required.

Therefore, the present inventor discovered that currently, transparent resin films can be stably obtained immediately when needed, and that the printed portion is a small portion, which can be printed in advance in the form of a strip and used as an intervening material when making a bag. If you do this, the printing cost will be less than 1/4 of the conventional one.Furthermore, by doing this, you can save inventory space by stocking only the printed strips and making bags as needed. In Japanese Patent Application Laid-Open No. 59-187549, they folded a band made of a transparent resin film at approximately the center, and in between folded a band made of a transparent resin film with a product name etc. printed on it. We have proposed a method for manufacturing a bag in which two or more printed strips are sandwiched and transported, and the bags are cut at predetermined intervals.

With this method, for example, multiple product names, sizes, users (men's, men's,
(for girls) etc. are connected in series, and after printing these printed portions at once, the printed portions are cut into each printed portion to form a printing band roll.

Then, when folding this printing band roll made of a transparent resin film around the center part using a bag-making machine, the printing bands of the two printing band rolls are sandwiched in a predetermined position. It is transported in a container and melted at both ends.

However, as mentioned above, when sandwiching two printed strips, the printed strips expand and contract, so
During the pinching and conveyance, a slight relative deviation inevitably occurred, resulting in a problem that the printed part was not positioned at the predetermined position. Note that this printing misalignment tends to gradually increase. Furthermore, this printing misalignment is significant when the width of the band varies.

On the other hand, fusing is carried out by mechanically detecting a specific point on any of the printed parts, so as mentioned above, if the printed part is misaligned, the bag becomes defective. has.

In addition, in this type of printed bag, a header part containing a core material is sometimes provided in the hanging part of the bag, but in this case, it is also possible to use the printed strip as the core material. However, it has the same problems as mentioned above.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a printed bag that can solve the above-mentioned problems with a simple structure.

(Means for Solving the Problems) In order to achieve the above object, the method for manufacturing a printed bag according to the present invention has two or more printed strips connected in a horizontal direction to form a single printed bag. As a band roll,
Before the sandwiching step, the strip from the strip roll is separated into each printing strip by a cutter, and
Each printing strip is arranged at a predetermined position within the folded strip using a separator and then cut by melting.

In addition, in a printed bag body having a header part,
Two or more printed strips are connected in the horizontal direction to form one printed strip roll, and before the sandwiching step, the strips from the strip roll are separated into each printed strip using a cutter. At the same time, one of the printed strips is positioned at the folded portion using a separator, and the other printed strip is placed at a predetermined position within the folded strip, and the edge opposite to the folded portion of the former printed strip is placed at a predetermined position within the folded strip. The parts are welded by heat sealing or the like and then cut by melting.

(Example) Next, the present invention will be explained with reference to the drawings which are one example.

FIG. 1 shows the manufacturing method of the present invention, and FIG. 2 shows the printing strip used in the invention and the manufacturing method thereof.

In Fig. 2, 1 is a gravure printing roll;
On the circumferential surface of this roll, a plurality of pairs of printed contents 2, such as a product name 2a and a quantity 2b (for one pair, for two pairs), are engraved.

Then, with the gravure printing roll 1, the plurality of pairs of printed contents 2 are printed on the wide transparent resin film 3.
A, 2B, 2C, .
3B, 3C...

Next, the printing band rolls 3A, 3B, 3C
A method of manufacturing the printed bag body 7 using the following will be explained.

As shown in FIG. 1, a so-called melt-cut bag is manufactured using a plain resin film fabric (strip body) 5 using a conventional manufacturing machine, but in the method of the present invention, for example, the printed band The printing strip 4 from the body roll 3A is conveyed together with the resin film fabric 5, during which it is separated into each printing strip 4a, 4b by a cutter 6, and then both printing strips 4a, 4b are separated by a roller (not shown) or the like. The resin film material 5 is inserted into the resin film material 5 at predetermined intervals, and both ends of the resin film material 5 and each of the printing strips 4a, 4b are melted to form a bag body 7.

Note that, as described above, the separated printing strips 4a,
4b at a predetermined interval using a roller or the like, depending on the number of printing strips, the distance from the cutter 6 to the fusing position may change during the separation process, and the printed content may not be located at the predetermined position on the bag body 7. be. In such a case, it goes without saying that appropriate measures should be taken, such as changing the conveyance path length of the printing strip.

In addition, as shown by broken lines in FIG. 1, before cutting the resin film fabric 5 from each printing strip 4a, 4b, the opening side edge of the bag made of the resin film fabric 5 of the printing strip 4a, 4b is cut. may be welded to the resin film fabric 5 using a heating roller 8, ultrasonic waves, or high frequency waves to prevent the product from getting caught on the printing strip when the product is stored in the bag body 7.

Next, when providing a header part, one side edge of the printing band 4b in FIG. 1 is positioned at the folded part P of the resin film fabric 5, and
One side edge of the printing strip 4b located on the opposite side is welded to the resin film fabric 5 using a heating roller 8 or the like to form a header portion 9, and then both ends of the resin film fabric 5 and the printing strips 4a, 4b are welded. It is cut into a bag body 7 with a header (see Fig. 3).

In some cases, a core material (not shown) may be inserted into the header portion 9 together with the printing band 4b.

(Effects of the Invention) As is clear from the above description, according to the present invention, the plurality of printing bands provided on the bag are composed of one roll and are then cut. Since the strips are integral, even if one of the printing strips tries to expand or contract during the process of inserting it into the resin film fabric, the amount will be extremely small.

Therefore, even if one point of the printed portion of one of the printed strips is detected as a reference point and fused, the printed portion will hardly shift and a printed bag can be manufactured at low cost. Furthermore, since the printed strip is located inside the bag body, the printed portion has a beautiful gloss and is extremely aesthetically pleasing.

Further, by positioning one of the separated printed strips at the folded portion of the bag, a bag with a header can be easily formed.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of a method for manufacturing a printed bag according to the present invention, Fig. 2 is a schematic explanatory diagram of a printed belt and its manufacturing method, Fig. 3 is an explanatory diagram of a printed bag with a header, and Fig. 4 is an explanatory diagram of a printed bag with a header. The figure is an explanatory diagram of a conventional printed bag, and FIG. 5 is an explanatory diagram showing a method of printing the printed bag of FIG. 4. 1 - Gravure printing roll, 2 - Printing content, 3
A, 3B, 3C - printed band roll, 4 - printed band, 5 - resin film fabric, 6 - cutter, 7 - bag body, 9 - header part, P - folded part.

Claims (1)

[Scope of Claims] 1. A belt made of transparent resin film is folded back approximately at the center, and two or more printed belts made of resin film on which a product name, quantity, etc. are printed are sandwiched between them at predetermined intervals. In the method for manufacturing a printed bag, the printed bag is transported and cut to a predetermined width perpendicular to the transport direction to produce a printed bag with a printed belt inside, in which the two or more printed belts are cut in a transverse direction. A single continuous printed band roll was obtained, and before the sandwiching step, the band from the band roll was separated into each printed band using a cutter, and each printed band was folded back using a separator. A method for manufacturing a printed bag, characterized in that the printed bag is disposed at a predetermined position within the band and then cut by melting. 2. A strip made of transparent resin film is folded back approximately at the center, and two or more printed strips made of resin film with product name, quantity, etc. In the method for producing a printed bag having a printed strip inside by cutting orthogonally to a predetermined width by melt cutting, the method includes printing two or more printed strips connected in a horizontal direction. A book band roll is used, and before the sandwiching step, the band from the band roll is separated into each printing band by a cutter, and one printing band is positioned at the folded part by a separator, Production of a printing strip characterized in that another printing strip is arranged at a predetermined position within the folded strip, and the edge of the former printing strip opposite to the folded portion is heat-sealed and then fused and cut. Method.