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. 02, 2014
Filed:
Feb. 24, 2014
Kiminori Masuda, Tokyo, JP;
Mariko Kojima, Tokyo, JP;
Akiko Bannai, Kanagawa, JP;
Takashi Tamai, Kanagawa, JP;
Tomohiko Kohda, Kanagawa, JP;
Naoko Kitaoka, Kanagawa, JP;
Kiminori Masuda, Tokyo, JP;
Mariko Kojima, Tokyo, JP;
Akiko Bannai, Kanagawa, JP;
Takashi Tamai, Kanagawa, JP;
Tomohiko Kohda, Kanagawa, JP;
Naoko Kitaoka, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An inkjet recording method is performed using an inkjet recording device including a recording head provided with a nozzle, a pressure chamber, a pressure generator and a driving signal generator, the method satisfying the following requirements (1) and (2): (1) it is required to use aqueous ink having a dynamic surface tension larger by 10 mN/m or more than a static surface tension when the surface life measured at 25° C. by a maximum foaming pressure method is 15 ms and a dynamic surface tension larger by 5 mN/m or more than a static surface tension when the surface life measured by a maximum foaming pressure method is 1500 ms and (2) it is required that the signals have a drawing pulse in one print period and a meniscus of the aqueous ink is drawn into the nozzle in two stages by the drawing pulse.