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:
Feb. 05, 2002
Filed:
Dec. 10, 1999
Fumihito Masubuchi, Kanagawa, JP;
Hirotoshi Eguchi, Kanagawa, JP;
Ricoh Company Ltd., Tokyo, JP;
Abstract
An inkjet recording apparatus has an inkjet head for ejecting a droplet of ink from a nozzle. The inkjet head includes an electrostatic actuator and a diaphragm which are arranged such that the diaphragm is prevented from being destroyed due to an excessive stress or fatigue. A constant amount of displacement of the diaphragm can be achieved even when a voltage fluctuation occurs. The diaphragm is elastically deformable by an electrostatic force. An electrode faces the diaphragm with a predetermined air gap therebetween so as to generate the electrostatic force. The electrode has a width smaller than a width of the diaphragm at all points along a longitudinal direction of the electrode. The electrode is situated under the diaphragm and arranged such that when the electrode is vertically projected onto the diaphragm, the projected electrode is situated within the diaphragm in a direction of the width of the electrode.