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:
Aug. 11, 2026
Filed:
Nov. 09, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Shin Ishimatsu, Kanagawa, JP;
Takatsugu Moriya, Tokyo, JP;
Koichi Ishida, Tokyo, JP;
Keiji Tomizawa, Kanagawa, JP;
Yoshihiro Hamada, Kanagawa, JP;
Fumi Tanaka, Kanagawa, JP;
So Aizawa, Kanagawa, JP;
Kyosuke Toda, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid ejection head includes ejection nozzles, pressure compartments, a supply port, and first pillar structures. The pressure compartments which each communicate with a corresponding ejection nozzle of the ejection nozzles and are each combined with an energy generating element configured to generates ejection energy for ejecting liquid. The supply port supplies the liquid to the pressure compartments. The first pillar structures are arranged between the supply port and the pressure compartments. The pressure compartments is each defined by a flow path walls arranged in line and parallel to each other. A liquid flow path is formed and configured to allow the liquid to flow through the liquid flow path from the at least one supply port via the first pillar structures into the pressure compartments. A longest clearance between the first pillar structures is smaller than a shortest clearance between the flow path walls and the first pillar structures.