The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 1999
Filed:
Feb. 03, 1997
Masahiro Fujii, Suwa, JP;
Keiichi Mukaiyama, Suwa, JP;
Hiroyuki Maruyama, Suwa, JP;
Tadaaki Hagata, Suwa, JP;
Mitsuro Atobe, Suwa, JP;
Shinichi Kamisuki, Suwa, JP;
Shinichi Yotsuya, Suwa, JP;
Hiroshi Koeda, Suwa, JP;
Yoshihiro Ohno, Suwa, JP;
Hitoshi Tanbo, Yokohama, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An inkjet head comprising a nozzle, an ink passage in communication with the nozzle, a diaphragm provided at one part of the ink passage, and an electrode provided in opposition to the diaphragm whereby an electrical pulse is applied between the diaphragm and electrode to deform the diaphragm by means of electrostatic force, thereby ejecting ink droplets from the nozzle. The actuator contains at least a vibration chamber formed by the diaphragm and electrode, and is sealed or made airtight with the volume V so that the ratio between the actuator volume V and the volume .DELTA.V eliminated by a distortion of the diaphragm during ink-jet head drive is within the range 2.ltoreq.V/.DELTA.V.ltoreq.8.