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:
Oct. 30, 2018
Filed:
Oct. 13, 2017
Keita Katoh, Superior, CO (US);
Hiroshi Gotou, Kanagawa, JP;
Takahiro Yoshida, Ibaraki, JP;
Akihiko Matsuyama, Kanagawa, JP;
Masahiko Ishikawa, Shizuoka, JP;
Yoshiki Yanagawa, Kanagawa, JP;
Keita Katoh, Superior, CO (US);
Hiroshi Gotou, Kanagawa, JP;
Takahiro Yoshida, Ibaraki, JP;
Akihiko Matsuyama, Kanagawa, JP;
Masahiko Ishikawa, Shizuoka, JP;
Yoshiki Yanagawa, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An ink discharge device including an ink, an ink discharge head, and a negative pressure generator is provided. The ink comprises water, a colorant, an organic solvent X having a solubility parameter of from 8.9 to 12.0 and comprising no glycol ether compound, and a copolymer comprising a structural unit represented by the following formula (1): where R1 represents a hydrogen atom or methyl group and Y represents an alkylene group having 2 to 18 carbon atoms. The ink discharge head includes a nozzle to discharge the ink, a plurality of individual liquid chambers in communication with the nozzle, a flow-in channel to let the ink flow into the individual liquid chambers, and a flow-out channel to let the ink flow out from the individual liquid chambers. The negative pressure generator is configured to generate a negative pressure that lets the ink flow out from the individual liquid chambers.