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:
Jan. 27, 2015
Filed:
Jun. 07, 2013
Fuji Xerox Co., Ltd., Tokyo, JP;
Sakon Takahashi, Kanagawa, JP;
Akihiro Iizuka, Kanagawa, JP;
Motoko Sakai, Kanagawa, JP;
Kunihiko Sato, Kanagawa, JP;
Kazuhiko Arai, Kanagawa, JP;
Nobumasa Furuya, Kanagawa, JP;
Masaaki Takahashi, Kanagawa, JP;
Daisuke Haruyama, Kanagawa, JP;
Koji Nishimura, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An electrostatic image developer includes a toner containing an external additive having a volume-average particle size of about 80 to 400 nm and an average circularity of about 0.7 to 0.85. The developer is used in an image forming apparatus including an image-carrying member having a top surface layer containing fluorocarbon resin particles, and a developer-carrying member that faces the image-carrying member and carries an electrostatic image developer, in which a value obtained by dividing the amount of developer on the developer-carrying member [g/m] by a shortest distance between the image-carrying member and the developer-carrying member [μm] is about 0.8 to 1.8, and a peripheral velocity ratio of the developer-carrying member to the image-carrying member is about 1.5 to 5.0 or the developer-carrying member moves in a direction opposite to the image-carrying member in a facing portion.