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. 16, 2010
Filed:
Dec. 09, 2008
Shuichi Hiroko, Susono, JP;
Tadashi Dojo, Numazu, JP;
Michihisa Magome, Mishima, JP;
Eriko Yanase, Suntou-gun, JP;
Takashi Matsui, Suntou-gun, JP;
Tomohisa Sano, Suntou-gun, JP;
Akira Sakakibara, Susono, JP;
Shuichi Hiroko, Susono, JP;
Tadashi Dojo, Numazu, JP;
Michihisa Magome, Mishima, JP;
Eriko Yanase, Suntou-gun, JP;
Takashi Matsui, Suntou-gun, JP;
Tomohisa Sano, Suntou-gun, JP;
Akira Sakakibara, Susono, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
To provide a magnetic toner which has superior low-temperature fixing performance and pressure roller anti-staining properties even in various forms of use, has been kept from image defects such as image non-uniformity even during long-time image reproduction and can achieve high-level image quality. In a magnetic toner having toner particles containing at least a binder resin and a magnetic material, the activation energy Ea (kJ/mol) that is determined from a shift factor aTin a master curve of the toner, prepared when 120° C. is set as reference temperature, and the activation energy Eb (kJ/mol) that is determined from a shift factor aTin a master curve of the toner, prepared when 150° C. is set as reference temperature, satisfy Expression (1), and the Ea is 110 kJ/mol or less:1.00≦Ea/Eb<1.20  (1).