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. 17, 2026
Filed:
Dec. 07, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Fumi Tanaka, Kanagawa, JP;
Yuzuru Ishida, Kanagawa, JP;
Yoshinori Misumi, Tokyo, JP;
Keiji Tomizawa, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present disclosure aims to obtain stable ejection characteristics after performing removal of burnt-on deposits. An embodiment of the present invention is a liquid ejection apparatus including: a liquid ejection head having an ejection port from which to eject liquid, a thermal action unit having a heat generating element for generating energy required to eject the liquid, and a first protective layer provided to block a contact between the thermal action unit and the liquid and formed of a material containing metal that dissolves into the liquid by having an electrochemical reaction with the liquid; and a control unit configured to perform a cleaning process to remove burnt-on deposits accumulating on the first protective layer by dissolving the first protective layer through an electrochemical reaction and perform an aging process to accumulate burnt-on deposits onto the first protective layer after the cleaning process.