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:
Apr. 12, 2016
Filed:
Oct. 10, 2014
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Yuzuru Ishida, Yokohama, JP;
Sadayoshi Sakuma, Oita, JP;
Norihiro Yoshinari, Kawasaki, JP;
Ichiro Saito, Yokohama, JP;
Maki Kato, Fuchu, JP;
Kenji Takahashi, Yokohama, JP;
Yoshinori Misumi, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/05 (2006.01); B41J 2/14 (2006.01);
U.S. Cl.
CPC ...
B41J 2/1404 (2013.01); B41J 2/14129 (2013.01); B41J 2/14145 (2013.01);
Abstract
In a liquid ejection head for ejecting liquid by using thermal energy, reduction of film thickness caused by elution of a protective layer when kogation on the protective layer is removed is made uniform and decrease in liquid ejection performance is suppressed. More specifically, a counter electrode is provided around a portion on which an ejection port of a flow path forming member is formed.