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:
Mar. 05, 2013
Filed:
Nov. 23, 2010
Masataka Nagai, Yokohama, JP;
Yoshinori Tagawa, Yokohama, JP;
Satoshi Ibe, Yokohama, JP;
Kazuhiro Asai, Kawasaki, JP;
Masaki Ohsumi, Yokosuka, JP;
Masataka Nagai, Yokohama, JP;
Yoshinori Tagawa, Yokohama, JP;
Satoshi Ibe, Yokohama, JP;
Kazuhiro Asai, Kawasaki, JP;
Masaki Ohsumi, Yokosuka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The opening area and shape of ejection orifices provided in an ejection orifice member influence the amount of liquid droplet. Therefore, it is necessary to check the opening area and shape of the ejection orifices in detail. For this purpose, in a liquid ejection head having ejection orifices used for ejecting liquid using energy generated by energy generating elements and a dummy ejection orifice having the same shape as the ejection orifices and not used for ejection of liquid, an examination member is provided at a position facing the dummy ejection orifice.