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:
Aug. 30, 2011
Filed:
Dec. 27, 2007
Kazuoki Fuwa, Toyonaka, JP;
Yoshihiro Mikuriya, Nishinomiya, JP;
Masayuki Hagi, Minoh, JP;
Hideaki Yasunaga, Ibaraki, JP;
Hiroaki Katoh, Nagaokakyo, JP;
Yoshitaka Sekiguchi, Nishinomiya, JP;
Kazuoki Fuwa, Toyonaka, JP;
Yoshihiro Mikuriya, Nishinomiya, JP;
Masayuki Hagi, Minoh, JP;
Hideaki Yasunaga, Ibaraki, JP;
Hiroaki Katoh, Nagaokakyo, JP;
Yoshitaka Sekiguchi, Nishinomiya, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A full-color toner kit including yellow, magenta, and cyan toners each including a benzimidazolone, a naphthol, and a copper phthalocyanine colorants, respectively, and resins (A) and (B) each of which having a polyester skeleton and containing a wax, and a resin (C) having a polyester skeleton and containing no wax. Each of the toners has a softening point of from 125° C. to 135° C. The following relationships are satisfied: Ts(A)<Ts(B), Ay+5≦Am≦Ay+15, and Ac+5≦Am≦Ac+15, wherein Ts(A) and Ts(B) (° C.) each represent softening points of the resin (A) and (B), respectively, and Ay, Am, and Ac each represent ratios (% by weight) of the amount of the resin (A) to total amount of the resins (A) and (B) in the yellow, magenta, cyan toners, respectively.