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:
Apr. 30, 2013
Filed:
Aug. 16, 2011
Tsuyoshi Sugimoto, Shizuoka, JP;
Naohiro Watanabe, Shizuoka, JP;
Osamu Uchinokura, Shizuoka, JP;
Tomoyuki Satoh, Kanagawa, JP;
Shinya Hanatani, Shizuoka, JP;
Mamoru Hozumi, Miyagi, JP;
Tsuyoshi Sugimoto, Shizuoka, JP;
Naohiro Watanabe, Shizuoka, JP;
Osamu Uchinokura, Shizuoka, JP;
Tomoyuki Satoh, Kanagawa, JP;
Shinya Hanatani, Shizuoka, JP;
Mamoru Hozumi, Miyagi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner containing: a non-crystalline polyester resin; a crystalline polyester resin; a releasing agent; a graft-modified polymer; and a colorant, wherein the graft-modified polymer is a polymer having a glass transition temperature of higher than 40° C. but lower than 80° C., and obtained by grafting an acrylic resin onto at least one of a hydrocarbon wax and a crystalline polyester resin, and wherein a SP value of the non-crystalline polyester resin is defined as SP1, a SP value of the crystalline polyester resin is defined as SP2, a SP value of the releasing agent is defined as SP3, and a SP value of the graft-modified polymer is defined as SP4, and SP1, SP2, SP3 and SP4 satisfy relations represented by Formulas (1) to (3):