Patent ID: 7128405
Filing Date: 2006-10-31
Classification: B41J

Abstract:
1. An inkjet head comprising: a cavity unit formed of an electrically conductive material with a plurality of nozzles and a plurality of pressure chambers in fluid communication with the corresponding nozzles; and an actuator including a plurality of sheet members laminated one on the other in a stacked direction, a plurality of drive electrodes corresponding to the pressure chambers, and a plurality of common electrodes, the plurality of drive electrodes and the plurality of common electrodes being arranged in alternation with respect to a thickness direction of the actuator, each of the drive electrodes and the common electrodes being sandwiched between corresponding sheet members, wherein portions of the sheet members sandwiched between the drive electrodes and the common electrodes serve as active portions that selectively eject ink droplets from the corresponding pressure chambers through the nozzles, wherein projected contours of all the drive electrodes fall within a projected contour of one of the common electrodes disposed closest to the cavity unit with respect to the thickness direction.