Patent ID: 7934812
Filing Date: 2011-05-03
Classification: B41J

Abstract:
1. An inkjet head chip, comprising: an ink chamber for containing ink; a plurality of piezoelectric elements deformable by applying a voltage; a plurality of channels partitioned with the plurality of piezoelectric elements and disposed parallel to each other along a width direction of the inkjet head chip; and a nozzle hole for discharging an ink droplet toward a recording medium; wherein the plurality of channels comprise a discharge channel disposed in a middle portion of the parallely disposed plurality of channels, dummy channels disposed outside of the discharge channel at respective ends thereof, and non-discharge channels disposed outside of the respective dummy channels; wherein the discharge channel communicates with the ink chamber via an ink introduction hole and with the nozzle hole; wherein at least one of discharge of the ink droplet from the dummy channels toward the recording medium and supply of the ink from the ink chamber to the dummy channels is interrupted; wherein the discharge of an ink droplet from the non-discharge channels toward the recording medium and the supply of ink from the ink chamber to the non-discharge channels are interrupted; and wherein the inkjet head chip is configured such that voltages are substantially simultaneously applied to one of the plurality of piezoelectric elements which is adjacent to the discharge channel and to one of the plurality of piezoelectric elements which is disposed between the dummy and non-discharge channels.