Original Publication Date: 1995-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Xerox Disclosure Journal
The present disclosure relates to a sheet gripper bar conveyor control system that accurately controls the position of a gripper bar (and the sheet it is holding) relative to a photoreceptor during transfer of a toned image to a sheet in a multicolor printer or copier. In a multipass color printer, tight control on the gripper bar positioning tolerances and correction of any gripper bar movement system to photoreceptor speed mismatch is essential to layering properly registerd multicolored images on a sheet. The "skip hitch" system disclosed herein was developed to allow looser piece part tolerances and less accurate velocity control of the gripper bar conveyor system relative to the photoreptor. The term skip hitch is used to decribe the color registration skip (or conveyor position "slip") that modifies sheet position during the transfer process. The "hitch" term relates a position correction that the gripper bar conveyor or photoreceptor makes in slowing down or speeding up for a finite period of time to obtain a desired position relationship to each other.