JPH0210063B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for adhering interleaf paper in equipment such as a continuous cutting line, and particularly when the lithographic printing plate metal web or interleaf paper has a multilayer structure with different electrical properties. The present invention relates to a method for adhering interleaving paper in equipment such as a continuous cutting line, which is optimal for adhering interleaving papers in close contact when the invention is configured as such.

[Background of the invention]

Conventionally, lithographic printing plates were made by coating an aluminum plate with a photosensitive composition in layers to create a photosensitive layer, the so-called PS plate (hereinafter referred to as ``PS plate'').
However, metal sheets cut using continuous cutting equipment for metal webs such as PS plates may be scratched on the surface during stacking or during the subsequent transportation process. To prevent this, a method is generally used in which interleaving paper is adhered to the surface of the metal web.

Conventionally, the method for adhering interleaf paper to metal webs was as follows:
A known method is to overlap a metal web with an interleaving paper, electrically charge the interleaving paper and the metal web, and bring them into close contact. For example, as described in Japanese Patent Application Laid-Open No. 55-106723, an interleaving paper is brought into close contact with the lower surface of the metal web by rolling down with pinch rolls, air in the intermediate layer is exhausted, and immediately after the exit side, static electricity is generated. A generator is installed,
A method of adhering interleaving paper by applying an electrostatic force to the interleaving paper immediately after it has been brought into close contact with a metal web is known.

However, in the above-mentioned interleaving paper bonding method, the metal web and the interleaving paper are brought into close contact with each other using a pinch roll, and an electrostatic generator is installed on the upper surface of the interleaving paper immediately after the pinch roll is released. When using multi-layer interleaving paper such as metal webs or polyethylene laminates with surfaces with different properties, the interleaving paper may not adhere well to the web, or the polyethylene side may overlap with the next metal sheet being conveyed at the stacking section. There are disadvantages in that the metal sheets are not smoothly conveyed due to adhesion and are difficult to align and stack.

[Purpose of the invention]

The present invention was developed in view of the above circumstances, and is capable of effectively electrostatically adhering interleaving sheets of metal webs having surfaces with different electrical properties. The purpose is to achieve good electrostatic adhesion of different multilayer interleaving papers to a metal web.

[Summary of the invention]

In order to achieve the above object, the present invention is characterized in that electrostatic charging is performed from the adhesive surface side of the metal web and/or the adhesive surface side of the interleaf paper on the input side of the pinch roller.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the method for adhering interleaf paper in equipment such as a continuous cutting line according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a schematic configuration of continuous cutting line equipment. A web 1 is produced from a metal web roll 10 in which a PS plate is wound into a coil.
2 (PS plate) is rewound, and this metal web 12 is guided to decurlers 15, 15, 15 through a plurality of conveyance rollers 14, 14, . The web 12 is decurled by the decurlers 15, 15, 15, and then conveyed toward the pinch rollers 16.

On the other hand, a slip paper 20 with the polyethylene side facing upward is conveyed above the pass line of the metal web 12 by a plurality of transport rollers 22, 22... be done. The slip paper 20 is sent to the pinch roller 16 through the expander roller 24,
Here, as shown in FIG. 2, the paper surface A of the interleaf paper 20 (the opposite surface to the polyethylene surface B) and the coated surface C of the metal web 12 are tightly adhered. A static electricity generator 2 for metal web is installed on the input side of the pinch roller 16.
6 or a static electricity generating device 28 for interleaf paper is provided. A puncher 30, a slitter 32, and a cutter 34 are arranged in this order on the exit side of the pinch roller 16. In the slitter 32, the side edges of the metal web 12 are chopped, and the chopped side edges are sent to a scrap hopper 38 through a chute 36. The side edges cut into strips by the scrapper 38 are transferred to the scrap conveyor 40.
is sent to and discharged. On the other hand, the metal web 12 whose side edges have been cut by the slitter 32 is cut into predetermined lengths by the cutter 34. The cut sheet-like metal web is sent to a carry-out conveyor 44 by a cutter outlet conveyor 42,
It is discharged.

First, a method of adhering the metal web 12 by electrostatically charging it in the continuous cutting line equipment configured as described above will be explained. The metal web 12 is conveyed from the roll 10 with the surface-treated coating surface C facing upward. This metal web 12 is conveyed by conveying rollers 14, 14, ... decurlers 15, 15, 15.
When the metal web 12 is sent to the static electricity generation device 26 side, the surface of the metal web 12 is charged with static electricity. On the other hand, from above the pass line of the metal web 12, the interleaving paper 20
is fed, and the paper side A of the interleaving paper 20 and the coated side C of the metal web 12 are electrostatically bonded to each other in such a manner that they face each other. Thereafter, the metal web 12 and the interleaving paper 20 are pinched by the pinch rollers 16, and the air layer located between the metal web 12 and the interleaf paper 20 is discharged, and the two come into close contact. According to the embodiment, since the coated surface C is electrostatically charged, the coated surface C, which has a high electrical resistance, has an electric charge and comes into good close contact with the interleaving paper 20. In addition, the interleaving paper 20 has the polyethylene side B facing upward, and the metal web 12 is electrostatically charged, so that after adhering the two, the interleaving paper 20
The amount of charge on the polyethylene surface B on the top surface of 0 is small;
Therefore, when the metal web 12 is stacked after being cut, the next upper metal web to be transported will not adhere to the polyethylene surface.

In the embodiment described above, a static electricity generating device 26 was provided to electrostatically charge the metal web 12, but a static electricity generating device 28 may be provided to charge the interleaving paper 20 side. That is, the interleaving paper 20 from the roll 18 is sent to the pinch roller 16 side via the conveyance rollers 22, 22, . . . and the expander roller 24. The interleaving paper 20 is fed with the polyethylene side B facing upward. When the interleaving paper 20 passes through the static electricity generation device 28, the static electricity generation device 28 electrostatically charges the paper surface A of the interleaf paper 20, so that the paper surface A of the interleaf paper 20 has an electric charge. Thereafter, the metal web 12 and the interleaving paper 20 are brought into close contact with each other by the pinch roller 16 in the same manner as described above. As a result, the paper surface A of the interleaf paper 20 and the coated surface C of the metal web 12 are electrostatically bonded to each other in such a manner that they face each other. Compared to the lower paper surface A, the polyethylene surface B of the interleaf paper 20 has a higher dielectric constant and is more likely to be charged with static electricity, but since the paper surface A is electrostatically charged, the polyethylene surface B The amount of electrical charge is small, and the polyethylene surface B side will not attract the next metal web to be conveyed during stacking, which will not disturb the alignment and stacking.

In the embodiment described above, the metal web 12 was electrostatically charged by the electrostatic generator 26, or the interleaving paper 20 was electrostatically charged and bonded by the electrostatic generator 28, but it is possible to use the electrostatic generators 26 and 28 at the same time. Alternatively, the metal web 12 and the interleaving paper 20 may be electrostatically charged and bonded together at the same time.

〔Effect of the invention〕

As explained above, according to the interleaving paper bonding method in equipment such as a continuous cutting line according to the present invention, electrostatic charging is performed from the photosensitive layer side of the metal web and/or the paper side of the interleaving paper, so that one side of the interleaving paper can be electrostatically charged. An interleaving paper composed of layers with different electrical properties, such as a polyethylene laminate interleaving paper, can be electrostatically bonded well to a metal web such as a PS plate. In addition, since electrostatic charging is performed from the adhesive side, the charging on the top surface of the interleaf paper is reduced, and there is no possibility of suction adhering the next upper metal web to be transported during stacking, which would disturb the alignment. There isn't.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of continuous cutting line equipment for carrying out the interleaving paper adhesion method in equipment such as continuous cutting lines according to the present invention, and Fig. 2 is a cross-sectional view showing the state of adhesion between the metal web and the interleaving paper. be. 10...Metal web roll, 12...Metal web,
18... Interleaving paper roll, 20... Interleaving paper, 26... Static electricity generation device for metal web, 28... Static electricity generation device for interleaving paper.

Claims (1)

[Scope of Claims] 1. A metal web with a multilayer structure, which has a photosensitive layer applied to the surface of a metal plate, and a multilayer paper, which has a laminate sheet attached to the surface, are passed between a pair of pinch rollers and bonded together. In the method of adhering interleaving paper in equipment such as continuous cutting lines, electrostatic charging is applied from the photosensitive layer side of the metal web and/or the paper side of the interleaving paper on the input side of the pinch roller, and then the metal web and interleaving paper are bonded together. is passed between pinch rollers to adhere the photosensitive layer side of the metal web and the paper side of the interleaving paper.Then, the adhered metal web and interleaving paper are cut into a predetermined shape, and the cut metal web is positioned above. A method for adhering interleaf paper in equipment such as a continuous cutting line, characterized in that the metal web is stacked so that the metal plate side of the metal web and the laminate sheet side of the metal web located below are in contact with each other.