Patent ID: 7300137
Filing Date: 2007-11-27
Classification: B41J

Abstract:
1. A liquid-discharge recording head comprising: a liquid-supply opening through which liquid is supplied; and a plurality of nozzles through which the liquid supplied from the liquid-supply opening is discharged for recording, the nozzles being arranged on both sides of the liquid-supply opening, wherein the nozzles include a first nozzle group, a second nozzle group smaller in diameter than the first nozzle group, and a third nozzle group smaller in diameter than the second nozzle group, and wherein a number of nozzles in the first nozzle group is greater than a number of nozzles in each of the second and third nozzle groups, and wherein the nozzles of the first and second nozzle groups are alternately disposed on one side of the liquid-supply opening, and the nozzles of the first and third nozzle groups are alternately disposed on the other side of the liquid-supply opening.