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:
Jan. 29, 2008
Filed:
Sep. 29, 2006
Shigeru Emoto, Shizuoka-ken, JP;
Shinichiro Yagi, Shizuoka-ken, JP;
Naohito Shimota, Shizuoka-ken, JP;
Maiko Kondo, Shizuoka-ken, JP;
Fumihiro Sasaki, Shizuoka-ken, JP;
Toshiki Nanya, Shizuoka-ken, JP;
Hiroto Higuchi, Shizuoka-ken, JP;
Masami Tomita, Shizuoka-ken, JP;
Tomoyuki Ichikawa, Shizuoka-ken, JP;
Shigeru Emoto, Shizuoka-ken, JP;
Shinichiro Yagi, Shizuoka-ken, JP;
Naohito Shimota, Shizuoka-ken, JP;
Maiko Kondo, Shizuoka-ken, JP;
Fumihiro Sasaki, Shizuoka-ken, JP;
Toshiki Nanya, Shizuoka-ken, JP;
Hiroto Higuchi, Shizuoka-ken, JP;
Masami Tomita, Shizuoka-ken, JP;
Tomoyuki Ichikawa, Shizuoka-ken, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner comprising toner particles comprising a first binder resin; a second binder resin different from said first binder resin and having a glass transition temperature of from 40 to 55° C.; a colorant; and a release agent, and a particulate resin material which is located on surface of the toner particles with a coverage of from 50 to 100%, and which has a glass transition temperature of from 50 to 90° C., wherein a weight ratio (W/W) between the second binder resin (W) and the first binder resin (W) is from 5/95 to 40/60, and wherein a ratio (G'/G′) between a storage modulus of the toner at 80° C. (G′) and a storage modulus at 180° C. (G′) is from 100 to 1,000.