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Plate measuring element

A technology for measuring components and plates, applied in general parts of printing machinery, printing, printing machines, etc., can solve the problem of not being able to accurately determine the center point of point clusters.

Active Publication Date: 2016-08-03
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the overlapping prints, the center point of the point cluster cannot be determined with sufficient precision

Method used

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  • Plate measuring element
  • Plate measuring element
  • Plate measuring element

Examples

Experimental program
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Effect test

Embodiment Construction

[0013] figure 1 Four printing units of an offset printing press are shown. Each printing unit 1 to 4 comprises an impression cylinder 5.1 to 5.4, a transfer cylinder 6.1 to 6.4 and a plate cylinder 7.1 to 7.4. An ink unit 8.1 to 8.4 and a dampening unit 9.1 to 9.4 are assigned to each plate cylinder 7.1 to 7.4. For conveying the sheets 10.1 to 10.4, transfer rollers 11 to 13 are located between the impression cylinders 5.1 to 5.4. The blankets 14.1 to 14.4 are stretched over the transfer cylinders 6.1 to 6.4. The printing plates 15.1 to 15.4 are stretched on the printing plate cylinders 7.1 to 7.4. During printing, the cylinder and roller rotate in the direction of arrow 16 .

[0014] During printing, the printing plates 15.1 to 15.4 are inked image-wise by means of corresponding ink units 8.1 to 8.4 and dampening units 9.1 to 9.4. The printing inks C, M, Y, K of the partial images reach the blankets 14.1 to 14.4 from the printing plates 15.1 to 15.4. If the sheets 10.1 ...

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Abstract

The invention relates to a register measuring element, especially a register measuring element on a sheet or web. The object of the present invention is to develop a registration measuring cell in which the accuracy of the registration measurement is improved. The invention consists in that, in a register measuring element produced by printing on a printing material (10), on said printing material (10) with a predetermined layer thickness (S N ) produces a printed image (19) with at least one printing ink (C, M, Y, K), the layer thickness (S P ) is less than the layer thickness (S N ). The register measuring element (21) of the invention has a transverse extension of less than 25 μm.

Description

technical field [0001] The invention relates to a version measuring element. Background technique [0002] A plurality of separate ink images are printed on the surface of the sheet in an offset printing press with a plurality of printing units arranged in series. Each separate ink image is a screened color separation made up of the nominal printed image. The ink-separated image is produced by inking the printing plate and transferring the printing ink to the sheet by means of the elastic backing on the transfer cylinder. Ideally, the cylinders and rollers guiding the sheets rotate at the same peripheral speed and the separate ink images have the desired position relative to each other. In order to be able to adjust the position of the partial ink images relative to one another, a register adjustment device is provided, with which the partial ink images can be displaced in the circumferential and lateral directions and rotated about an axis. In order to check the distance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F33/10
CPCB41F33/0081B41P2233/52
Inventor A·豪克
Owner HEIDELBERGER DRUCKMASCHINEN AG
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