Patent · US Expired

Method of regulating ink-feeding or inking in printing

US5791251A · kind A · utility

9Cited by

2References

5Claims

0Family size

Assignee

Heidelberger Druckmaschinen AG · DE

Inventors

Bernd Kistler · Eppingen, DE
Nikolaus Pfeiffer · Dover, US
Manfred Schneider · Lichtenfels, DE

Key dates

Filing date	Apr 29, 1996
Grant date	Aug 11, 1998
Priority date	—
Expiry date	Apr 29, 2016

Classification

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

Abstract

Method of regulating inking when printing is performed with more than three printing colors, which includes comparing, in a control, actual value color locations derived from a color measuring arrangement with reference value color locations in a given user color space; deriving control signals from the attained comparison values, in accordance with a predetermined relationship, for an inking device containing ink distribution devices which influence the thickness of a layer of printing ink applied zonally in the form of halftone dots or solid full-tone areas to a material to be printed; and further deriving the actual value color locations from measurement locations in the printed image. When printing with n printing colors wherein n is greater than 3, deriving the actual value color locations from measurement locations of at least (n-2) regions, wherein vectors of area coverage of all of the n printing colors involved are, respectively, linearly independent of one another.

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