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:
Feb. 04, 2014
Filed:
Jul. 25, 2012
Tsuyoshi Nozaki, Osaka, JP;
Tomoharu Miki, Osaka, JP;
Tomohiro Fukao, Osaka, JP;
Kazuoki Fuwa, Hyogo, JP;
Yoshimichi Ishikawa, Hyogo, JP;
Yoshihiro Mikuriya, Hyogo, JP;
Takuya Kadota, Hyogo, JP;
Tsuyoshi Nozaki, Osaka, JP;
Tomoharu Miki, Osaka, JP;
Tomohiro Fukao, Osaka, JP;
Kazuoki Fuwa, Hyogo, JP;
Yoshimichi Ishikawa, Hyogo, JP;
Yoshihiro Mikuriya, Hyogo, JP;
Takuya Kadota, Hyogo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner including: a core particle; and fine resin particles, the core particle containing at least a binder resin, a releasing agent and a colorant, wherein the toner is in shape of particles, and each toner particle has a sea-island structure having the core particle and island portions, which are convex portions formed from the fine resin particles on surface of the core particle, wherein the binder resin contains first and second resins, and the fine resin particles are made of third resin, wherein the first resin is crystalline resin, and the second and third resins are non-crystalline resin, wherein the second resin has glass transition temperature (Tg2) and the crystalline resin has melting point (Tc1) where Tg2 is higher than Tc1, and wherein the third resin has glass transition temperature (Tg3) and the toner has glass transition temperature (Tgt) wherein Tg3 is higher than Tgt.