Patent ID: 6464335
Filing Date: 2002-10-15
Classification: B41J

Abstract:
An ink jet printer comprising:a carriage motor; a head assembly including a carriage and two or more heads mounted on the carriage, the carriage being operatively, connected to said carriage motor and reciprocally moved back and forth in a main scanning direction to perform successive scans, each of the two or more heads being formed with at least one nozzle array having a plurality of nozzles aligned at an equi-pitch in an auxiliary scanning direction perpendicular to the main scanning direction, wherein to print dots on a plurality of dot lines, a series of scans are performed; a paper feed motor for moving a print paper in the auxiliary scanning direction; driving means for driving the two or more heads to eject ink droplets from the plurality of nozzles, said driving means driving different heads individually during different scans whereat each of the two or more heads completes printing of dots on a zone determined by a position in the auxiliary scanning direction of the each of the two or more heads mounted on the carriage; and control means for controlling said paper feed motor to move the print paper a relevant amount each time the each of the two or more heads completes printing of the dots on the zone.