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:
Oct. 07, 2025
Filed:
May. 15, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Kazuya Yoshii, Kanagawa, JP;
Soji Kondo, Kanagawa, JP;
Naozumi Nabeshima, Tokyo, JP;
Keiichiro Tsukuda, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid ejection head has an ejection module including a pressure chamber and an ejection element configured to eject a liquid in the pressure chamber, a supply channel, a collection channel connected to the supply channel through a pressure chamber, a first pressure adjustment unit, a second pressure adjustment unit, and a circulation pump. A controlled pressure in the first pressure adjustment unit is set higher than a controlled pressure in the second pressure adjustment unit. A pressure reception area of a second flexible member and a second pressing plate in a second pressure control chamber in a case where a second opening is brought into an open state is smaller than a pressure reception area of a first flexible member and a first pressing plate in a first pressure control chamber in a case where a first opening is brought into an open state.