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:
May. 06, 2003
Filed:
Jul. 09, 2002
Applicant:
Inventors:
Osamu Watanabe, Kumamoto, JP;
Koji Matsuo, Fukuoka, JP;
Kenji Tomita, Kumamoto, JP;
Isaku Kanno, Nara, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/045 ; H04R 1/700 ;
U.S. Cl.
CPC ...
B41J 2/045 ; H04R 1/700 ;
Abstract
In order to provide a miniaturized ink jet head having a piezoelectric actuator by which ink in a pressure chamber is emitted and to improve its productivity and reliability, a vibration plate is made up of two layers having different Young's moduli, i.e., a layer having a smaller Young's modulus and a layer having a greater Young's modulus. Further, the Young's modulus of each of the layers and is set at values ranging from 50 GPa to 350 GPa and the total thickness of the vibration plate is set at values ranging from 1 &mgr;m to 7 &mgr;m.