ADJUSTING DEVICE AND METHOD FOR ROTARY PRINTING MACHINE
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United States of America Patent
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Issued Date -
Aug 21, 2008
app pub date -
Feb 21, 2008
filing date -
Feb 21, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A device for adjusting the position of a printing unit with respect to a printing web in a rotary printing machine comprising a control unit operable for controlling the movement of the printing unit from a predefined initial position P.sub.i to a predefined end position P.sub.f by successive steps T. A vision system is operable for capturing images of the formats (F) which are successively printed on the printing web between the initial position P.sub.i and the end position P.sub.f. A calculation unit is operable for evaluating the images and for determining the position P.sub.opt of the printing unit at which the images are identical and additionally the position at which the grayscale of the pixels of each image are identical.
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