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:
Nov. 03, 2009
Filed:
Mar. 30, 2007
Manabu Hibi, Nagoya, JP;
Kenichi Satake, Osaka, JP;
Shin Ishikura, Krishima, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya-shi, Aichi-ken, JP;
Kyocera Corporation, Kyoto-shi, Kyoto-fu, JP;
Abstract
An inkjet head includes a passage unit and an actuator unit. The passage unit includes a common ink chamber and an individual ink passage leading from an outlet of the common ink chamber through a pressure chamber to an ejection port. The actuator unit can selectively take a first state in which the volume of the pressure chamber is Vand a second state in which the volume of the pressure chamber is Vlarger than V. The actuator unit changes from the first state into the second state and then returns to the first state to eject ink from the ejection port. The individual ink passage is formed such that the volume Vd of a partial passage in the individual ink passage corresponding to a region from an outlet of the pressure chamber to the ejection port, and the volume Vc of the individual ink passage, satisfy a condition that Vd/Vc is not less than 0.12 and not more than 0.40.