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Register measuring element

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

Active Publication Date: 2012-04-18
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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Examples

Experimental program
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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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PUM

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Abstract

The invention relates to a register measuring element, and especially relates to the register measuring element of a page or a web. The target of the invention is to develop the register measuring element which can improve the register measuring precision. Through the register measuring element which is generated by printing on a printed material, the printed material (10) generates a printed image (19) which includes at least one printing ink (C, M, Y, K) and has a preset layer thickness (SN). The layer thickness (SP) of the printing ink of the register element (21) is smaller than the layer thickness (SN) of the printing inks (C, M, Y, K) in the printed image (19). The register measuring element (21) has a crosswise extending size which is smaller than 25 microns.

Description

technical field [0001] The invention relates to a registration measuring cell according to the preamble of claim 1 . 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 ...

Claims

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Application Information

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