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Color correction method when the task is changed

A task, temporary technology, applied in the general parts of printing machinery, printing, printing machines, etc., to achieve the effect of rapid reduction

Active Publication Date: 2016-10-26
海德堡印刷机械知识产权股份两合公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has the result that, when the setpoint value of the ink quantity changes while the printing press is running, an increased ink quantity is briefly supplied to the inking unit

Method used

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  • Color correction method when the task is changed
  • Color correction method when the task is changed
  • Color correction method when the task is changed

Examples

Experimental program
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example

[0019] An example is:

[0020] 80% surface overlap FD of the ink zone / ink key (Farbzone) for the first printing job.

[0021] For the second printing task, the surface overlapping ratio FD of 40% in the same ink area.

[0022] From image 3 The following values ​​can be read from the table:

[0023] Ink volume 80% FD = 1.2; ink volume 40% FD = 1.1

[0024] For the second print job, an overinking of 1.2 / 1.1=1.09 results in a print job change. This means that 9% of the ink volume must be removed from the ink zone when the second print job is started. According to the prior art, this is done by said toning.

[0025] Other options are also possible:

[0026] Ink can be fed in or removed as necessary before printing. Ink zones that require more ink at start-up than the first printing job can obtain this ink before the first printing, for example by means of ink entry 2 . That is to say, for these inked areas no toning is required during printing and the inked areas are ther...

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PUM

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Abstract

The method involves temporarily supplying preset amount of ink during a printing operation. The color differences between two successive print jobs are calculated by a control computer and the amount of ink supplied to inking unit of the printing machine is equalized based on color differences between the print jobs. Large amount of ink supplied during the start of last print job is removed while stopping dampening solution supply by the control computer.

Description

technical field [0001] The invention relates to a method for controlling the ink volume with a control computer in an inking unit of a printing press, in which the supply of the ink volume is temporarily increased during a printing run compared to the normal requirement. Background technique [0002] Such a method for controlling the amount of ink in a printing press is known from laid-open document DE 100 56 247 A1. This relates to a method for controlling ink volumes in different inking zones of a printing press inking unit, wherein the ink volumes are quickly adjusted in the different inking zones, wherein adjacent inking zones are also set as far as possible. It is possible to quickly achieve its stable ink volume. This is achieved in that, in the different ink zones of the printing press, a setpoint value for the ink quantity is preset for each ink zone in a time-dependent manner; so that the values ​​of the ink streams output by the ink sources for the ink zones corre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F33/10
CPCB41F31/045B41F33/0045B41P2233/11
Inventor N·普法伊费尔P·埃尔特
Owner 海德堡印刷机械知识产权股份两合公司