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. 06, 2008
Filed:
Mar. 17, 2005
Shinya Nakayama, Numazu, JP;
Fumihiro Sasaki, Fuji, JP;
Satoshi Mochizuki, Numazu, JP;
Akihiro Kotsugai, Numazu, JP;
Yasuo Asahina, Numazu, JP;
Osamu Uchinokura, Numazu, JP;
Hisashi Nakajima, Numazu, JP;
Sonoh Matsuoka, Numazu, JP;
Takuya Saito, Numazu, JP;
Tomoyuki Ichikawa, Kawasaki, JP;
Koichi Sakata, Numazu, JP;
Shinya Nakayama, Numazu, JP;
Fumihiro Sasaki, Fuji, JP;
Satoshi Mochizuki, Numazu, JP;
Akihiro Kotsugai, Numazu, JP;
Yasuo Asahina, Numazu, JP;
Osamu Uchinokura, Numazu, JP;
Hisashi Nakajima, Numazu, JP;
Sonoh Matsuoka, Numazu, JP;
Takuya Saito, Numazu, JP;
Tomoyuki Ichikawa, Kawasaki, JP;
Koichi Sakata, Numazu, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A toner containing toner particles having a core-shell structure containing a binder resin, a colorant and a release agent. The toner particles are prepared by dissolving or dispersing at least one of the binder resin and a precursor thereof in an organic solvent or a polymeric monomer and reacting the resultant in an aqueous medium for reaction, wherein the toner satisfies the following relationship: ΔTm=Tm−Tm>10 ° C., wherein Tmrepresents half efflux temperature of the toner and Tmrepresents half efflux temperature of a toner which is prepared by melting and kneading the toner particles and wherein a content of the release agent existing close to the surface portion of the toner particles is from 7 to 30% by volume based on an entire portion close to the surface portion of the toner particles when the content is determined by Fourier Transform Infrared Spectroscopy Attenuated Total Reflection (FTIR-ATR) method.