Method for detecting registration errors

Details Method for detecting registration errors Method for detecting registration errors

G - Physics

06

K

G06K 9/03 (2006.01) B41F 33/00 (2006.01)

Patent

CA 2041281

A-723 Heidelberger Druckmaschinen AG Summary In a procedure for detecting registration errors on a printed product provided with register marks, in which the register marks undergo opto-electrical scanning when the printed product passes through the printing machine, the register marks are scanned by sensors with at least four sensor elements which are for the most part arranged in a square. The register marks each have two edges running diagonally in relation to the web and at opposed angles.

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