Patent · US Expired

Method for controlling the ink guidance in a printing machine

US5551342A · kind A · utility

10Cited by

2References

5Claims

0Family size

Assignee

MAN Roland Druckmaschinen AG · DE

Inventors

Thomas Fuchs · New York, US
Johannes Slotta · Gelnhausen, DE
Dieter Wagner · Oberriexingen, DE

Key dates

Filing date	Dec 22, 1994
Grant date	Sep 3, 1996
Priority date	—
Expiry date	Dec 22, 2014

Classification

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

Abstract

A method for controlling the ink guidance of a printing machine, especially a sheet-fed offset printing machine. Ink-density spectra are recorded by means of a spectral photometer at a plurality of image points of the original and of the printed copy and the differential ink-density spectra are determined from these values. These differential ink-density spectra are then represented as a linear combination of the individual ink-density spectra of the inks participating in the composite printing. Regulating commands for the ink-guide members of the printing machine are thereupon derived from the proportionality factors of this linear combination.

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