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. 25, 2018
Filed:
Oct. 25, 2016
Takayuki Nakai, Kanagawa, JP;
Takahiro Yoshida, Ibaraki, JP;
Shiomi Andou, Kanagawa, JP;
Toshimichi Odaka, Kanagawa, JP;
Kanshi Abe, Ibaraki, JP;
Takayuki Nakai, Kanagawa, JP;
Takahiro Yoshida, Ibaraki, JP;
Shiomi Andou, Kanagawa, JP;
Toshimichi Odaka, Kanagawa, JP;
Kanshi Abe, Ibaraki, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A droplet discharge head includes a plurality of discharge orifices, a plurality of pressure generation chambers, a supply liquid chamber, a plurality of supply channels, a circulation liquid chamber, and a plurality of circulation channels. The discharge orifices discharge droplets. The pressure generation chambers are communicated with the discharge orifices, to apply pressure to liquid in the pressure generation chambers. The supply liquid chamber stores liquid to be supplied to the pressure generation chambers. The supply channels are communicated with the pressure generation chambers. The circulation liquid chamber receives liquid collected from the pressure generation chambers. The circulation channels communicate the pressure generation chambers with the circulation liquid chamber. Each of the circulation channels includes a small cross-section portion that has a smaller cross-sectional area in a width direction perpendicular to a longitudinal direction of each of the circulation channels than another portion in the longitudinal direction.