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:
Jan. 15, 2019
Filed:
Dec. 18, 2017
Masami Iwama, Ibaraki, JP;
Yukio Otome, Ibaraki, JP;
Takahiro Yoshida, Ibaraki, JP;
Takakazu Kihira, Ibaraki, JP;
Takayuki Nakai, Kanagawa, JP;
Shiomi Andou, Kanagawa, JP;
Isamu Suzuki, Kanagawa, JP;
Ryuji Yoshida, Kanagawa, JP;
Kanshi Abe, Ibaraki, JP;
Junichi Iwata, Ibaraki, JP;
Katsuya Ishii, Ibaraki, JP;
Toshimichi Odaka, Kanagawa, JP;
Masami Iwama, Ibaraki, JP;
Yukio Otome, Ibaraki, JP;
Takahiro Yoshida, Ibaraki, JP;
Takakazu Kihira, Ibaraki, JP;
Takayuki Nakai, Kanagawa, JP;
Shiomi Andou, Kanagawa, JP;
Isamu Suzuki, Kanagawa, JP;
Ryuji Yoshida, Kanagawa, JP;
Kanshi Abe, Ibaraki, JP;
Junichi Iwata, Ibaraki, JP;
Katsuya Ishii, Ibaraki, JP;
Toshimichi Odaka, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A liquid discharge head includes a plurality of nozzles from which liquid is discharged, a plurality of individual-liquid-chambers communicating with the plurality of nozzles, respectively, a plurality of individual-drainage-channels communicating with the plurality of individual-liquid-chambers, respectively, a drainage-side common-liquid-chamber communicating with each of the plurality of individual-drainage-channels, a filter having filter holes and disposed between the plurality of individual-drainage-channels and the drainage-side common-liquid-chamber, and an intermediate-drainage-channel disposed between the filter and the plurality of individual-drainage-channels. The intermediate-drainage-channel faces the filter and communicates with two or more of the plurality of individual-drainage-channels. A cross-sectional area of the intermediate-drainage-channel is greater than a cross-sectional area of each of the plurality of individual-drainage-channels communicating with the intermediate-drainage-channel in a direction perpendicular to a direction of liquid flow.