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:
Sep. 18, 2007
Filed:
Feb. 19, 2003
Atsuo Sakaida, Gifu, JP;
Yuji Shinkai, Handa, JP;
Takeshi Asano, Nagoya, JP;
Atsushi Hirota, Nagoya, JP;
Atsuo Sakaida, Gifu, JP;
Yuji Shinkai, Handa, JP;
Takeshi Asano, Nagoya, JP;
Atsushi Hirota, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
An ink-jet head includes a passage unit including a plurality of pressure chambers, and a plurality of actuator units attached to a surface of the passage unit for changing the volume of each of the plurality of pressure chambers. The actuator unit has a layered structure laminated with four piezoelectric sheets to. In the actuator unit, individual electrodes are formed at positions respectively corresponding to each of the pressure chambers, only on a face of the uppermost piezoelectric sheet opposite to an attached face of the actuator unit to the passage unit. A common electrode kept at a constant potential is provided on a face of the uppermost piezoelectric sheet at the side facing the passage unit.