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:
Apr. 21, 2026
Filed:
May. 26, 2023
Riso Technologies Corporation, Tokyo, JP;
Takashi Tozuka, Sunto Shizuoka, JP;
Minoru Koyata, Mishima Shizuoka, JP;
RISO Technologies Corporation, Tokyo, JP;
Abstract
According to one embodiment, a liquid ejection head includes a substrate with an opening through which a first liquid can pass. An actuator is on a first side of the substrate and has a plurality of pressure chambers. A manifold is on a second side of the substrate. The manifold forms a first flow path for a second fluid. The liquid ejection head has first electrode with portions formed on an upper surface of the actuator, a surface on the first side of the substrate, an inner wall of the opening, and a surface on the second side of the substrate in a region outside the first flow path.