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:
Jun. 03, 2025
Filed:
Mar. 29, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Naoya Tsukamoto, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid ejection recording element unit includes a first substrate provided with a first partition wall that demarcates a first flow channel including an ejection port of a liquid and an energy generating portion that generates energy for ejecting the liquid from the first flow channel; and a second substrate provided with a second partition wall that demarcates a second flow channel including a supply port of the liquid, the second substrate being stacked on the first substrate, so that the second flow channel communicates with the first flow channel. The first partition wall and the second partition wall are contiguous across a predetermined gap in the stacking direction of the first substrate and the second substrate. A hydraulic diameter of the gap is shorter than a hydraulic diameter of a smallest flow channel portion having a minimum flow channel cross-sectional area in the first flow channel.