Process and apparatus for the ink control of a printing machine

Details Process and apparatus for the ink control of a printing machine Process and apparatus for the ink control of a printing machine

B - Operations, Transporting

41

F

342/21

B41F 33/00 (2006.01)

Patent

CA 1326707

PROCESS AND APPARATUS FOR THE INK CONTROL OF A PRINTING MACHINE ABSTRACT OF THE DISCLOSURE A three-color offset printing machine produces, during the printing of sheets, color measuring strips with several color measuring fields. A gray half-tone field produced by the overprinting of three colors serves as the reference field. The color location of the reference field is compared in a color deviation computer with the color location of a correlated desired reference field. From the color deviation, a layer thickness variation computer calculates a layer thickness variation control vector by means of a sensitivity matrix calculated on the basis of a linear model by a matrix computer. The matrix computer evaluates a series of secondary fields comprising three single color half-tone fields, three single color full- tone fields, three two-color full-tone fields, and a three-color full-tone field.

588035

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