发明名称 |
Process and apparatus for the ink control of a printing machine |
摘要 |
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.
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申请公布号 |
US4975862(A) |
申请公布日期 |
1990.12.04 |
申请号 |
US19890293528 |
申请日期 |
1989.01.05 |
申请人 |
GRETAG AKTIENGESELLSCHAFT;HEIDELBERGER DRUCKMASCHINEN AG |
发明人 |
KELLER, GUIDO;KIPPHAN, HELMUT |
分类号 |
B41F31/02;B41F33/00;B41F33/14;B41M1/14 |
主分类号 |
B41F31/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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