Electronic device for determining a register error in multi-color printing machines
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United States of America Patent
Stats
-
Aug 15, 1989
Grant Date -
N/A
app pub date -
Apr 17, 1987
filing date -
Apr 18, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Device for determining a register error between individual colors in multicolor printing machine, comprising a photoelectric scanning apparatus for scanning differently colored register marks printed together on a printed sheet, an evaluation apparatus interacting with the scanning apparatus for determining the relative positions of the individual register marks, the scanning apparatus being disposed in a housing to be positioned at a given measuring location on the stationary printed sheet, the scanning apparatus comprising a scanning head movably disposed in the housing, and drive a device provided in the housing for producing the scanning movement of the scanning head relative to the printed sheet within a relatively small scanning region.
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