Method and apparatus for register correction

Details Method and apparatus for register correction Method and apparatus for register correction

1987-04-21

1989-05-09

Martin, Jr., William D.

Geometrical instruments

Gauge

Collocating

33620, G01B 2104, B41F 3300

Patent

active

048276260

ABSTRACT:
A method and apparatus for measuring and correcting register errors in multi-color printing machines is disclosed. A multi-color sheet that has been printed having register marks for each color is placed on a measuring table. The approximate locations of the register pairs and the accurate spacings of the individual register marks in each pair are determined by a light stylus, an electronic color video measuring camera system or on a measuring table having a digitizer surface. The values are entered into a computer which calculates the corrective values to be used to relocate one or more of the printing plates carried by each plate cylinder to achieve color registry in multi-color printing.

REFERENCES:
Dai Nippon Printing Company, Ltd., Telecursor.

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