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:
Jul. 02, 2013
Filed:
May. 22, 2009
Shin Hasegawa, Shizuoka, JP;
Minoru Hakiri, Shizuoka, JP;
Mitsuru Naruse, Shizuoka, JP;
Hiroyuki Fushimi, Shizuoka, JP;
Shin Hasegawa, Shizuoka, JP;
Minoru Hakiri, Shizuoka, JP;
Mitsuru Naruse, Shizuoka, JP;
Hiroyuki Fushimi, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An inkjet recording ink which includes: a carbon black; a dispersant, wherein the dispersant is a sodium naphthalenesulfonate-formalin condensate; resin emulsion; and water, in which the resin emulsion contains a resin which is at least one of a urethane resin and a styrene-acryl resin, and the ink satisfies the following relationship: 20≦B−A≦50, where A(nm) represents a particle diameter D90 of particles contained in dispersion containing the carbon black, the dispersant, and water, which is before added with the resin emulsion, and B(nm) represents a particle diameter D90 of particles contained in the ink.