Control method for metering the quantity of dampening medium

A quality, measuring instrument technology, used in general parts of printing machinery, printing, printing presses, etc.

Inactive Publication Date: 2017-06-06
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, it has the disadvantage that only too little, rather than too much, of the wetting medium can be detected

Method used

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  • Control method for metering the quantity of dampening medium
  • Control method for metering the quantity of dampening medium
  • Control method for metering the quantity of dampening medium

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Experimental program
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Embodiment Construction

[0027] The new knowledge used in the present invention is that the measured ink density DV in the printed image and the measured amount of wetting medium F M F Poti Has a fixed association. For this purpose, certain inspection elements are used on the printed board in the printing machine, which inspection elements have corresponding dependencies. Such inspection elements can be produced in different ways. For example, a coating can be applied to the ink-guiding layer of the printing plate or the ink-guiding layer of the printing plate can be modified, for example, by partial removal. In addition, a coating layer can be applied to the ink-free non-printing area of ​​the printing plate or the non-printing area of ​​the printing plate that guides the wetting medium can be modified. It is also possible to apply a foil with desired characteristics on the surface of the printing plate. In addition, the roughness or height of the water or ink guiding layer on the printing plate ca...

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PUM

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Abstract

The invention relates to a method for adjusting the amount of dampening medium in a printing press with a computer and a measuring device. The invention is characterized in that, in the printing press, the inspection element on the printing plate forms a measurement area with the ink volume and the dampening medium volume (F M ), the measurement area is measured with the measuring instrument and the computer calculates and adjusts the required printing temperature in the dampening unit of the printing press on the basis of the measured value thus obtained and the known relationship. The amount of wetting medium (F M ).

Description

Technical field [0001] The invention relates to a method for adjusting the amount of dampening medium in a printing press with a computer and a measuring instrument. Background technique [0002] In offset printing, the dampening medium in the non-printing areas ensures that these areas do not receive ink. If too little dampening medium is applied to the printing plate, that is, the so-called smear boundary is exceeded, this will cause the printing ink to also occupy the non-printing area of ​​the printing plate and then the non-printing area starts to be ink Flow or be dyed. Conversely, if too much wetting medium is applied to the printing plate, this can cause so-called water marks and other printing problems. Therefore, it is very important to accurately measure the amount of wetting medium. If so little wetting medium is used so that the smear boundary is not reached or exactly not exceeded, it is considered the best wetting medium metering. In this case, the minimum allo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F33/00
CPCB41F33/0054
Inventor A·豪克N·普法伊费尔
Owner HEIDELBERGER DRUCKMASCHINEN AG
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