Method for processing color measurement in printing machine

A technology for color measurement and printing machines, applied to general parts of printing machinery, printing machines, printing, etc., can solve problems such as color matching fluctuations and inability to provide stable states

Active Publication Date: 2007-10-03
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the color matching is subject to large fluctuations during the adjustment phase, whereby the trend estimation here as in EP0 741 029 A2 cannot provide a criterion for reaching a steady state

Method used

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  • Method for processing color measurement in printing machine

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Embodiment Construction

[0019] The printing press 1 in this figure has two printing units 3 , 4 which process printing materials 9 in the form of sheets. The sheet-form printing material 9 is removed from the feeder stack 8 in the feeder 2 and fed to the first printing unit 3 via a transport device. In the printing units 3 , 4 , the printing material 9 in the form of a sheet is printed in the printing nip between the blanket cylinder 13 , 26 and the impression cylinder 10 , 28 . The sheet 9 is transported between the two printing units 3 , 4 by means of a transport cylinder 14 . Following the second printing unit 4 , the printed sheets 9 are transferred to the delivery 6 and are deposited there on the delivery stack 7 . The printing units 3 , 4 each have inking units 16 , 17 , which apply printing ink to the printing plates on the printing plate cylinders 11 , 12 . In order to control the properties of the printing ink, dampening devices 18 , 19 are provided in the two printing units 3 , 4 , which ...

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PUM

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Abstract

A color measurement on printed materials produced by a printing press is performed by at least a first color measuring device installed in the printing press and at least a second color measuring device. A signal is output by the first color measuring device in the printing press when the measured color values registered on the printing materials are located within a predefined tolerance limit for a predefined period and that, after the signal has been output, a color measurement on one of the printed materials thus produced is performed with the second color measuring device.

Description

technical field [0001] The invention relates to a method for color measurement on a printing material processed by a printing press by means of at least one first color measuring device and at least one second color measuring device installed in the printing press. The invention also relates to a device for carrying out the method. Furthermore, the invention also relates to a printing machine with such a device. Background technique [0002] In order to evaluate the quality of processed printing materials, it is known to use color measuring instruments. With the aid of color measuring instruments, differences in color matching between the printed original and the processed substrate can be detected, even to the extent that they are not noticeable to the naked eye. In addition, subjective impressions of the observer can be avoided and automatic color adjustment can be achieved by means of the color measuring device. A number of color measuring instruments using colorimetry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F33/00B41F33/10
CPCB41F33/0036
Inventor 维尔纳・胡贝尔曼弗雷德・施奈德沃尔夫冈・盖斯勒
Owner HEIDELBERGER DRUCKMASCHINEN AG
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