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:
Dec. 20, 2019
Seiko Epson Corporation, Tokyo, JP;
Takahiro Katakura, Okaya, JP;
Hirofumi Sakai, Shiojiri, JP;
Keigo Sugai, Chino, JP;
Shinichi Nakamura, Okaya, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A liquid-discharging-head includes a nozzle having a first-nozzle-portion having a first-sectional-area and a second-nozzle-portion having a second-sectional-area larger than the first-sectional-area, a liquid chamber which communicates with the nozzle, and a piezoelectric-element which changes a pressure inside the liquid chamber, in which the piezoelectric-element is driven from the control section, and the liquid-discharging-head executes a first control in which an apex of a liquid surface is drawn into the second-nozzle-portion in a state in which an inner wall surface of the first-nozzle-portion is covered by a liquid film by decreasing the pressure inside the liquid chamber, and a second control in which a shape of the apex of the liquid surface is inverted to a protruding shape towed the opening and the droplet is discharged from the nozzle by increasing the pressure inside the liquid chamber in a state in which the inner wall surface is covered by the liquid film.