Patent ID: 6132035
Filing Date: 2000-10-17
Classification: B41J

Abstract:
An ink jet printing head comprising:a pressure chamber supplied with ink, said pressure chamber having a vibration plate which is subject to being driven in vibration thereby to increase pressure in said pressure chamber when force is applied to said vibration plate, said vibration plate having a first surface and a second surface which is opposite to the first surface;a nozzle which communicates with said pressure chamber and through which the ink is ejected when the pressure in said pressure chamber is increased;force applying means for applying force to the first surface of said vibration plate thereby to drive the vibration plate in vibration and thereby increase the pressure in the pressure chamber so as to eject the ink from said nozzle; andsupport means, arranged at a position excluding a central portion of said pressure chamber, for resiliently supporting the second surface of said vibration plate with respect to said pressure chamber, so as to facilitate displacement of the vibration plate relative to the pressure chamber responsive to the force applied from the force applying means due to resilient deformation of said support means.