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:
May. 23, 2006
Filed:
Aug. 06, 2004
Kohki Katoh, Tokyo, JP;
Masanori Suzuki, Suntou-Gun, JP;
Yohichiro Watanabe, Fuji, JP;
Masahide Yamashita, Numazu, JP;
Akihiro Kotsugai, Numazu, JP;
Toyoshi Sawada, Odawara, JP;
Keiko Shiraishi, Susono, JP;
Kohki Katoh, Tokyo, JP;
Masanori Suzuki, Suntou-Gun, JP;
Yohichiro Watanabe, Fuji, JP;
Masahide Yamashita, Numazu, JP;
Akihiro Kotsugai, Numazu, JP;
Toyoshi Sawada, Odawara, JP;
Keiko Shiraishi, Susono, JP;
Ricoh Company, Ltd., Yokohama, JP;
Abstract
A color toner composition including at least toner particles including at least a binder resin; a colorant and a release agent dispersed in the binder resin; and a titania as an external additive, wherein the colorant has an average dispersion particle diameter not greater than 0.5 μm; the release agent and the binder resin are insoluble to each other; the toner particles satisfy the relationship: 0.05≦Dw/D≦0.4, wherein Dw represents an average dispersion particle diameter of the release agent and Drepresents a weight-average particle diameter of the toner particles; and the titania has a segregation rate of from 0.5 to 5%.