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:
Nov. 11, 2008
Filed:
Aug. 04, 2005
Masahiro Ohki, Numazu, JP;
Naohiro Watanabe, Sunto-gun, JP;
Ryota Inoue, Numazu, JP;
Akinori Saitoh, Numazu, JP;
Sonoh Matsuoka, Numazu, JP;
Masahide Yamada, Numazu, JP;
Chiaki Tanaka, Tagata-gun, JP;
Masahiro Ohki, Numazu, JP;
Naohiro Watanabe, Sunto-gun, JP;
Ryota Inoue, Numazu, JP;
Akinori Saitoh, Numazu, JP;
Sonoh Matsuoka, Numazu, JP;
Masahide Yamada, Numazu, JP;
Chiaki Tanaka, Tagata-gun, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A toner including a binder resin comprising a polyester resin in an amount of from 50 to 100% by weight, wherein the polyester resin includes an unsaturated polyester resin which is preferably a crystalline polyester resin; a colorant; and a fatty acid metal salt which is preferably microencapsulated. A method for preparing a toner including forming particles of a toner composition including at least a binder resin including a polyester resin in an amount of from 50 to 100% by weight and a colorant, in an aqueous medium to prepare a dispersion of a particulate material, wherein the polyester resin includes an unsaturated polyester resin; drying the particulate material; and mixing a fatty acid metal salt with the particulate material to subject double bonds of the unsaturated polyester resin to oxidation polymerization.