Patent ID: 6736492
Filing Date: 2004-05-18
Classification: B41J

Abstract:
An apparatus for ejecting liquid droplets, comprising:a plurality of plate-like piezoelectric bodies, each of the piezoelectric bodies including a pair of primary surfaces, a pair of end surfaces, and electrodes, a plurality of grooves being formed on one of the primary surfaces, the grooves being arranged in parallel at a predetermined distance from each other, each of the grooves having a pair of ends, one of the end surfaces differing from the primary surface, one end of each of the parallel grooves being open in the one end surface, a plurality of nozzles being arranged to conform with the plural openings, the electrode formed on an inner surface of each of the grooves, the primary surfaces of the plural piezoelectric bodies facing the same direction, and the primary surfaces on which the nozzles are formed being stacked and mutually oriented in a common direction; and a liquid supply path that commonly supplies a liquid to all of the plural grooves formed on the respective plural piezoelectric bodies, the liquid supply path being common to the plural piezoelectric bodies; such that the grooves are supplied with liquid, and a cross section of the grooves is changed to eject the liquid through the nozzles when a voltage is impressed to the electrodes.