Patent Number: 6,168,263

Title: Ink jet recording apparatus

Abstract: An ink jet recording apparatus that achieves sufficient attraction force even when the actuator is sealed. In the ink jet recording apparatus, an electric pulse is applied between a diaphragm and electrode by a drive circuit to deform a diaphragm by electrostatic force to eject an ink droplet from a nozzle comprises a vibration chamber containing a wall surface formed by the diaphragm and a wall surface on which the electrode is formed, and a first cavity communicating with the vibration chamber and containing a wall surface on which is provided a lead for connecting the drive circuit and electrode. The vibration chamber is sealed airtight, and comprises a second cavity communicating with the vibration chamber or first cavity for increasing the volume of the airtight sealed part of the actuator.

Inventors: Nojima; Shigeo (Suwa, JP), Fujii; Masahiro (Shiojiri, JP), Takekoshi; Taro (Shiojiri, JP), Ishikawa; Hiroyuki (Shiojiri, JP)

Assignee: Seiko Epson Corporation

International Classification: B41J 2/14 (20060101); B41J 2/16 (20060101); C04B 37/04 (20060101); B41J 002/04 ()

Expiration Date: 01/02/2018