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:
Dec. 18, 2018
Filed:
Dec. 01, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Atsushi Hiramoto, Machida, JP;
Ryoji Kanri, Zushi, JP;
Yoshiyuki Fukumoto, Kawasaki, JP;
Atsunori Terasaki, Kawasaki, JP;
Atsushi Teranishi, Kawasaki, JP;
Masahiko Kubota, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid ejection head includes: a substrate including an energy-generating element; a flow path forming member including a discharge port and having a liquid flow path formed between the flow path forming member and the substrate; and a plurality of through-passages passing through the substrate, each of the through-passages including a first through-passage part serving as a common liquid chamber and a plurality of second through-passage parts communicating with the first through-passage part, wherein a separation wall separating the adjacent first through-passage parts includes a plate-shaped member separating the adjacent first through-passage parts and approximately vertical to a substrate in-plane direction and, at least one protrusion protruding from the plate-shaped member in the substrate in-plane direction and contacting a bottom portion of the first through-passage part.