Patent ID: 7513597

Claim:
A computer-readable medium having instructions for controlling a computing-controlled printing apparatus to perform a method for printing a substrate by depositing printing ink thereon, the method itself comprising the steps of: a) incrementally advancing a substrate to predetermined printing positions disposed along a path of travel; b) at each printing position, passing a print head having a predetermined nozzle length L H and having N nozzles therein along a direction oriented substantially transversely to the path of travel so that on any one pass at least some of the N nozzles in the print head each addresses a plurality of print locations disposed along a respective scan line defined on the substrate; c) during a pass, actuating a nozzle to deposit printing ink on a predetermined number Q of selected print locations on the given scan line addressed by that nozzle on that pass; and d) repeating steps a) through c) P H number of times so that on every pass after P H number of passes each scan line is addressed by a different nozzle; the method being characterized in that, on any given pass, the number Q of selected print locations onto which printing ink is deposited by each of the N nozzles varies from nozzle to nozzle along substantially the entire length L H of the nozzle.