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Optimized register control process in a sheet-fed printing press

A printing press, sheet-fed technology, applied in printing presses, general parts of printing machinery, printing, etc., can solve the problems of different moving paths, without considering overprint adjustment, etc., to achieve the effect of rapid adjustment process

Inactive Publication Date: 2014-09-17
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the following problem is not taken into account here: that the lengths of the movement paths of the individual adjustment elements may be different and thus undergo a rather long adjustment process before a correct alignment and overprint adjustment is achieved, since the longest movement path determines the overall time
However, JP62-253451 deals only with registration adjustment and does not take into account register adjustment, that is, the position of the individual color separations and thus the position of the printed image relative to the edge of the printed sheet

Method used

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  • Optimized register control process in a sheet-fed printing press
  • Optimized register control process in a sheet-fed printing press
  • Optimized register control process in a sheet-fed printing press

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Embodiment Construction

[0018] exist figure 1 A sheet 11 is shown in the image 3 Measured by the register sensor 6 in the sheet-fed printing press 1 shown in . The deviation 18 determined here is relative to the specified position Sp which gives the desired position of the printed image in the circumferential direction relative to the side edge of the sheet 11 . exist figure 1 In , the largest deviation from a given position Sp is found at the color separation "yellow" of the printed color. In this case, the maximum deviation 18 is characterized by Smax. To thereby place all separations in figure 1 In order for the coordination and overprinting to be corrected precisely at a given position Sp, the yellow separation must be corrected with the maximum travel path Smax. This means that the much longer travel path Smax compared to the other color separations determines the entire length of the adjustment process, so that a very long adjustment process is required. This approach corresponds to the ...

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Abstract

The invention relates to a method for adjusting registration and overprinting in a sheet-fed printing press with a control computer (10), in which method both registration and overprinting are controlled by the control computer (10) in one adjustment process 10) Adjustment and for adjustment both the register adjustment element (12) in the printing unit (4, 5) and the adjustment element in the feeder (2) are used. The invention is characterized in that, before carrying out the adjustment process, in the computer (10) a It includes the optimization of the movement paths of the register adjusting element (12) and the adjusting element (15) in the feeder (2).

Description

technical field [0001] The invention relates to a method for adjusting registration and register in a sheet-fed printing press with a control computer, in which method, in one adjustment process, both registration and register are adjusted by the control computer and for The adjustment is performed not only with register adjustment elements in the printing unit but also with adjustment elements in the feeder. Background technique [0002] Correct adjustment of register and registration is important in sheet-fed offset web presses in order to obtain high-quality printing results. Overprinting is here understood to mean the position of the printed image relative to the edge of the printed sheet, while registration is understood to mean the position of the individual color separations relative to one another. [0003] Several control and adjustment devices for overprinting and registration in sheet-fed printing presses are known from the prior art. An adjustment device of thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F21/00
CPCB41F33/00B41F33/0081B41P2213/91B41F33/0036B41P2213/90
Inventor H·伦哈特
Owner HEIDELBERGER DRUCKMASCHINEN AG
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