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Method for producing smearing boundary-inspection zone in compression plate for offset printing-printing plate

An inspection area, offset printing technology, applied in the preparation of printing surface, plate preparation, printing, etc., can solve the problems of narrow structure space and high pollution risk of laser, and achieve the effect of saving structure space

Inactive Publication Date: 2013-09-11
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantage here is that the laser is located in the printing unit
On the one hand, the installation space there is limited and, on the other hand, there is a high risk of contamination of the laser, for example by ink mist

Method used

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  • Method for producing smearing boundary-inspection zone in compression plate for offset printing-printing plate
  • Method for producing smearing boundary-inspection zone in compression plate for offset printing-printing plate

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Embodiment Construction

[0019] figure 1 A simplified diagram with a flow of the manufacturing method is shown. In the first step 1, the printing plate 5 (see figure 2 ) with the aid of a printing plate exposure device. In this case, part of the ink-carrying polymer layer of the printing plate is crosslinked or decrosslinked by means of laser radiation.

[0020] In a second step 2 a washing process is carried out in which the non-crosslinked parts of the polymer layer are removed from the printing plate.

[0021] In a subsequent third step 3 , the printing forme is coated with a subbing layer in order to protect the areas of the printing forme that guide the dampening medium.

[0022] In a fourth step 4, the printing plate is locally heated by a second irradiation at a suitable point or in the area where the dampening medium is guided and thus produces an inspection zone 6 in this area (see figure 2 ). The radiation and the type of gluing used in the fourth step 4 are selected in such a way tha...

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Abstract

In a method for producing an inspection zone (6) for identifying a smearing boundary for a printing plate (5) of offset printing, a rubber coating of the printing plate is used for producing the inspection zone (6), where the irradiation takes place.

Description

technical field [0001] The invention relates to a method for producing an inspection field for detecting smudge boundaries on a printing form for offset printing. Background technique [0002] A printing form with measuring fields is described in DE 103 28 705 A1. The measuring zone remains free of ink when the amount of dampening medium is sufficient and receives ink when the amount of dampening medium is too little. Receiving ink is known as smearing or smearing. The smear boundary is the transition from sufficient to too little wetting medium. The border-smudged layer is obtained by introducing energy into the measurement region, which can be achieved by means of a laser. The amount of dampening medium in the measuring zone is reduced by the introduced energy, so that the measuring zone receives ink. The reduction of the amount of wetting medium is achieved by vaporizing the wetting medium by laser action. The acceptance of ink by the measuring zone is detected by th...

Claims

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Application Information

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IPC IPC(8): B41C1/10B41F33/00
CPCB41M1/06B41N3/08
Inventor M·施勒霍尔茨
Owner HEIDELBERGER DRUCKMASCHINEN AG