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Register sensor

A technology of sensors and registration marks, applied in the field of registration sensors, can solve problems such as deviation, color separation cannot be accurately overprinted and registered with each other

Inactive Publication Date: 2005-11-09
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Basically in every printing press with several printing units there is the danger that overlapping color separations will not be printed exactly on top of each other and have so-called misregistration

Method used

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Embodiment Construction

[0028]The printing press 1 in FIG. 1 is a sheet-fed rotary printing press with a feeder module 2 for feeding printed sheets 705 from a sheet stack into the printing press 1 and a take-up unit at the other end of the printing press 1. The paper container 3 is used for stacking the printed sheets 705 after printing. In between, there are four printing units 4 , 5 in FIG. 1 , of which the last printing unit 5 in the direction of conveyance of the printed sheet is equipped with an in-line measuring device. In principle, any number of printing units 4 , 5 is conceivable, wherein the online measuring device does not have to be installed in the last printing unit 5 . The on-line measurement device 6 is mainly used for performing spectrum measurement on the printing control strip on the printed sheet 705 after passing through the printing machine 1, so as to perform automatic color adjustment. In FIG. 1 , two register sensors 15 are arranged on an in-line measuring device 6 having th...

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Abstract

An apparatus in a machine for processing printing material has a register sensor for register measurement between at least two color separations of a printed image printed above one another on a printing material. The register sensor registers optically deviations between two color separations lying one above the other on the printing material and forwards the deviations onto a computer. The apparatus includes register marks to be measured by the apparatus. The apparatus is distinguished in that the register sensor contains at least one photodiode having at least two quadrants, and in that the largely rectangular evaluation areas of the photodiode are aligned obliquely in relation to the edges of the conveyed printing material.

Description

technical field [0001] The invention relates to a device for register measurement between at least two color separations of a printed image which are present on a printing material superimposed on one another by means of a register sensor in a machine for processing printing materials and to a device for such a register Registration marks sensed by a registration sensor, wherein the registration sensor optically detects the deviation between two color separations which are superimposed on one another on the printing material and transmits it to a computer. Background technique [0002] In virtually every printing press with several printing units there is the risk that overlapping color separations will not be printed exactly on top of each other and have so-called misregistration. Every printing press with at least two printing units therefore offers the possibility of reducing these register deviations by means of a correction device. These changed register adjustments c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F33/14B41F33/00B65H23/02
CPCB41F33/0081
Inventor 沃尔夫冈·盖斯勒克里斯托弗·里格尔弗兰克·舒曼
Owner HEIDELBERGER DRUCKMASCHINEN AG
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