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:
Aug. 16, 2005
Filed:
Jul. 10, 2002
Nobuyoshi Sugahara, Shizuoka, JP;
Masaaki Taya, Ibaraki, JP;
Junko Yoshikawa, Ibaraki, JP;
Takayuki Itakura, Shizuoka, JP;
Yojiro Hotta, Ibaraki, JP;
Nobuyoshi Sugahara, Shizuoka, JP;
Masaaki Taya, Ibaraki, JP;
Junko Yoshikawa, Ibaraki, JP;
Takayuki Itakura, Shizuoka, JP;
Yojiro Hotta, Ibaraki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A toner is disclosed which is composed of toner particles containing at least a binder resin, a colorant and a wax, and an external additive. The wax has, in its DSC endothermic curve, a maximum endothermic peak at 55° C. to 80° C. within the temperature range from 30° C. to 160° C., the maximum endothermic peak having a half width of from 2° C. to 7° C., and the binder resin is composed chiefly of a polyester resin. The toner has a dynamic elastic modulus from 5×10to 1×10dN/mat 140° C., and its ratio to a dynamic elastic modulus at 170° C. is from 0.05 to 50, and the toner contains 10 to 20% by weight of THF-insoluble matter A of a binder resin component after 8 hours from the start of extraction and 1 to 10% by weight of THF-insoluble matter B of the binder resin component after 24 hours from the start of extraction, the ratio of A to B, B/A, being from 0.1 to 0.8. Also disclosed is a fixing method making use of this toner.