B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
341/41
B65H 23/188 (2006.01) B41F 13/02 (2006.01) B41F 33/00 (2006.01)
Patent
CA 1325835
ABSTRACT Process of register adjustment or maintenance by means of register marks and an index pulse of the processing element, in which a postion pulse train indicates the instantaneous postion and the speed of the processing element during each of its cycles. It is essentially characterized in that, to allow an automatic initial register adjustment and maintenance, it consists in determining and storing, in the form of numerical sequence, at last one characteristic of a selected register mark, in continuously picking up the signal of a detector, in sampling this signal synchronously from the position pulses, between the index pulses, and in writing the results in memory, in the form of numerical values, at successive addresses, in periodically analyzing the memory contents to locate in it the sequence of numerical values corresponding best to that determined as a function of the selected register mark, in calculating, from a specific address of said sequence, and from the posititon of the processing element associated with it, the deviation between the actual position and the set point of the regiser mark and, from the deviation thus calculated, in applying the desired correction to bring the deviation to zero. The invention is particularly useful in off-line machines processing a web of preprinted material.
580824
Minschart Marc Gustave
Mitches & Co.
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