B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
341/41
B65H 23/18 (2006.01) B26D 5/34 (2006.01)
Patent
CA 1161525
WEB REGISTRATION CONTROL Abstract of the Disclosure A register control (21) is provided for a web handling apparatus (22) having a drive motor (29) operatively moving a web (23) containing repetitive indicia (34) through a sequencially operating function apparatus (27) performing repetitive operations on the web. A control (41) responds to the speed of the drive motor (29) and the position of the function apparatus (27) and the position of the indicia (34) to provide a speed command signal (Vc) to a full wave regenerative thyristor control circuit (38) to operatively control the operating speed of a pair of nip rolls (25, 26) through the controlled energization of a corrective motor (35) to maintain registration between the function apparatus (27) and the indicia (34). The control (41) provides a timed modification to a sensed speed signal Vs for providing a modified speed command signal (Vc) when the system is out of registration. A speed command modification circuit (213) responds to an advance modification timing circuit (79) and an advance coincidence circuit (81) to increase the speed of the correction motor (35) and responds to a retard timing modification circuit (78) and a retard coincidence circuit (80) to decrease the operating speed of the correction motor (35). -42-
380688
Hanlan Marc A.
Marks & Clerk
LandOfFree
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