Patent ID: 8190043

Claim:
A method for compensating a charge retentive imaging surface for a photoreceptor in a toner image processing machine, the charge retentive imaging surface including a plurality of panels, each panel including a document printing zone (DPZ) and an interdocument zone (IDZ), and the machine including at least one specially programmed computer, at least one sensor, and charging members for depositing charges on the charge retentive imaging surface, comprising: measuring for each panel, using the at least one sensor, first density values for a plurality of points in the DPZ, wherein the DPZ is in a printing region of the photoreceptor; measuring for each panel, using the at least one sensor, a second density value for the IDZ; determining for said each panel, using a processor in the at least one specially programmed computer, a variation of the first density values with respect to a desired density value; determining for each IDZ, using the processor, a respective compensated IDZ density value; determining, using the processor, a difference between the respective compensated IDZ density value and the desired value; and, modifying operation of the respective charging members according to the difference, such that the first density values for said each panel are substantially centered with respect to the desired density value.