Patent ID: 6386667
Filing Date: 2002-05-14
Classification: B41J

Abstract:
A method for printing with an ink jet nozzle array having a plurality of nozzles at a different radial distance from a center of coordinates, comprising;receiving a print job defining at least one image to be printed during an ink jet printing cycle; supporting a flat print medium to receive ink droplets ejected by the nozzle array during the printing cycle; selectively generating firing pulses to the ink jet nozzle array in dependence on the image to be printed, including generating firing pulses for respective ones of the nozzle array at different firing rates, wherein nozzles closer to the center of coordinates are fired less frequently than nozzles further from the center of coordinates; providing relative rotational and translational motion between the nozzle array and the medium such that a spiral locus centered at a center of rotation coincident with the center of coordinates is defined by the nozzle array relative to the medium; and ejecting ink droplets onto the medium in response to the firing pulses during said printing cycle.