Patent · US Expired

Process for controlling coloration in multicolor printing

US6192147A · kind A · utility

9Cited by

4References

2Claims

0Family size

Assignee

Heidelberger Druckmaschinen AG · DE

Inventors

Harald Bucher · Eschelbronn, DE
Wolfgang Geissler · Bad Schönborn, DE
Bernd Kistler · Eppingen, DE
Werner Huber · Witzenhausen, DE

Key dates

Filing date	Jan 14, 1998
Grant date	Feb 20, 2001
Priority date	—
Expiry date	Jan 14, 2018

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41F33/0045
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A process for controlling coloration in multicolor printing, wherein a photoelectric measuring arrangement (3) is used to obtain actual color measurement values from the printed image (4), wherein the actual color measurement values are compared with specified setpoint color measurement values, and wherein the comparison signals are supplied to a color controlling device (12), with the layer thickness of the ink to be applied to a material to be printed (1) being controllable by means of color controlling elements (12), monitoring signals are continuously derived at selected measuring locations (8), whereby the number of the measuring locations (8) is increased if the monitoring signals exceed a specified threshold value and the actual color measurement values obtained at the increased number (N.sub.2) of measuring locations (8) are processed into comparison signal. The invention can be used in multicolor printing machines.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.