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. 05, 2005
Filed:
Apr. 08, 2002
Katsuhisa Yamazaki, Numazu, JP;
Hirohide Tanikawa, Suntoh-gun, JP;
Hiroshi Yusa, Tokyo, JP;
Takashige Kasuya, Suntoh-gun, JP;
Yoshihiro Ogawa, Suntoh-gun, JP;
Shuhei Moribe, Susono, JP;
Katsuhisa Yamazaki, Numazu, JP;
Hirohide Tanikawa, Suntoh-gun, JP;
Hiroshi Yusa, Tokyo, JP;
Takashige Kasuya, Suntoh-gun, JP;
Yoshihiro Ogawa, Suntoh-gun, JP;
Shuhei Moribe, Susono, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A toner showing a high transferability and suitable for use in cleanerless image forming system is formed of toner particles comprising at least a binder resin and magnetic iron oxide. The toner is characterized by a specific circularity distribution relative to its weight-average particle size and a controlled degree of surface-exposed magnetic iron oxide providing an extract solution with hydrochloric acid showing an absorbance of 1.0-2.5 at a wavelength of 340 nm. The toner is suitably produced by a production system including a rotary mechanical pulverizer and a one-pass surface treatment apparatus for continuously applying a mechanical impact force to pulverized toner particles therein.