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. 07, 2021
Filed:
Apr. 22, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Koichi Ishida, Tokyo, JP;
Shingo Okushima, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An element substrate of a liquid ejection head includes an ejection opening array in which multiple ejection openings are arranged along a predetermined direction, pressure chambers communicating with the ejection openings, and heat generating elements for ejecting liquid, supplied to the pressure chambers, through the ejection openings. The element substrate also includes a predetermined supply path extending in the predetermined direction and communicating with the pressure chambers, a predetermined collection path communicating with the pressure chambers, multiple liquid supply ports communicating with the supply path at different positions in the predetermined direction, and a liquid collection port communicating with the collection path. Among the multiple liquid supply ports, at least a liquid supply port located at an end portion in the predetermined direction has an opening area larger than the opening area of the liquid collection port.