Patent ID: 7413294

Claim:
An inkjet head, comprising: a common ink puddle section; a nozzle plate comprising a plurality of nozzle orifices arranged thereon; an ink flow channel substrate comprising grooves, the grooves communicating from the common ink puddle section to the nozzle orifices, the grooves being formed alternately in a front surface and a back surface of the ink flow channel substrate, the nozzle plate being fixed to end sections of the grooves; a chamber plate being stacked on the ink flow channel substrate, the chamber plate comprising pressure generation chambers corresponding to the nozzle orifices, the pressure generation chambers being larger in width than the grooves; a diaphragm stacking on one surface of the chamber plate opposite from the ink flow channel substrate; and a pressure generator provided on the diaphragm for the pressure generation chambers to generate a change in an internal pressure of the pressure generation chambers, wherein the common ink puddle section remains in communication with the pressure generation chambers to supply ink to the pressure generation chambers, wherein a volumetric capacity of the pressure generation chambers is changed in accordance with a change in the pressure of the pressure generation chambers, to eject an ink droplet from the nozzle orifice, and wherein an entire width of the pressure generation chambers is larger than an entire width of the grooves, wherein each nozzle orifice on the nozzle plate is arranged on a single straight line.