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:
Mar. 24, 2015
Filed:
Sep. 15, 2011
Hiroyuki Fujikawa, Yokohama, JP;
Kunihiko Nakamura, Gotemba, JP;
Nozomu Komatsu, Mishima, JP;
Yoshiaki Shiotari, Mishima, JP;
Koh Ishigami, Mishima, JP;
Kentaro Kamae, Yokohama, JP;
Takayuki Itakura, Mishima, JP;
Hiroyuki Fujikawa, Yokohama, JP;
Kunihiko Nakamura, Gotemba, JP;
Nozomu Komatsu, Mishima, JP;
Yoshiaki Shiotari, Mishima, JP;
Koh Ishigami, Mishima, JP;
Kentaro Kamae, Yokohama, JP;
Takayuki Itakura, Mishima, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An object of the present invention is to improve resistance to wraparound during fixing while achieving both low-temperature fixability and resistance to hot offset. A further object is to suppress image density variations and fogging in white background regions during use at high print coverage rate at high temperature and high humidity. A toner containing inorganic fine particles and toner particles containing a binder resin and a wax being provided, the toner being characterized in that the binder resin contains a polyester resin A obtained by condensation polymerization of a polyvalent carboxylic acid and an alcohol component mainly containing an aromatic diol and a polyester resin B obtained by condensation polymerization of a polyvalent carboxylic acid and an alcohol component mainly containing an aliphatic diol, and in that the degree of segregation of the wax in the toner depth direction from the toner surface toward the toner center is controlled.