Patent ID: 8254825

Claim:
A method of controlling image to print media sheet registration in a digital printing system employing a plurality of image marking engines with unsynchronized seamed photoreceptor belts comprising: (a) disposing a first and second of the image marking engines (IME) in tandem and feeding the print media sheet from the first IME to the second IME; (b) disposing an inverter between the first and second IME and inverting the print media sheet after marking on one side thereof in the first IME; (c) monitoring seam positions of the seamed photoreceptor belts of the first and second IMEs and scheduling arrival times for the print media sheet to arrive at the first IME and the second IME in response to the monitored seam positions so as to avoid the seams of the seamed photoreceptor belts; (d) varying a dwell time of the print media sheet in the inverter in response to the scheduled arrival times in order to accommodate varying amounts of time between the scheduled arrival time to the first IME and the scheduled arrival time to the second IME and controlling arrival of the print media sheet to the second IME and providing proper image registration thereon; and (e) operating the seamed photoreceptor belts independent of a synchronization therebetween.