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:
Jul. 11, 2017
Filed:
Jul. 08, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Naohiko Tsuchida, Abiko, JP;
Wakashi Iida, Toride, JP;
Yoshihiro Ogawa, Toride, JP;
Toru Takahashi, Abiko, JP;
Daisuke Tsujimoto, Toride, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is a magnetic toner which exhibits a high degree of blackness and high tinting strength, and in which scraping of a toner carrying member surface by the magnetic toner is not caused, and image defects such as fogging and tailing are suppressed. A magnetic toner comprising a magnetic toner particle that contains a binder resin and a magnetic iron oxide particle, wherein, the number-average particle diameter of the magnetic iron oxide particle ranges from 0.05 μm to 0.15 μm, and a relationship between the number-average particle diameter (μm) of the magnetic iron oxide particle and the specific surface area (m/g) of the magnetic iron oxide particle satisfies Expression (1) below.[Number−average particle diameter]×[specific surface area]≦1.10  (1).