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. 14, 2025
Filed:
May. 24, 2023
Kenta Hagiwara, Kanagawa, JP;
Shunsuke Horie, Kanagawa, JP;
Hiroki Kobayashi, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An inkjet printing method including: discharging ink contained in an ink storage unit, from a nozzle of a nozzle forming surface of a discharging unit; and supplying the ink from the ink storage unit to the discharging unit. The ink includes specific components and satisfies a specific relation between dynamic surface tension and time. The supplying includes: forming a closed space by covering the nozzle forming surface with a lid member, and freely controlling a pressure between the discharging unit and the ink storage unit; and forming an open space by opening the lid member on the nozzle forming surface, and setting the pressure to be the same as atmospheric pressure. A negative pressure difference between the ink storage unit and the discharging unit is 70-120 mmAq before discharge of the ink, 30-80 mmAq during the discharging, and the former is equal to or greater than the latter.