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:
May. 26, 2009
Filed:
Apr. 25, 2008
Shigeru Tsukada, Ebina, JP;
Shunichiro Shishikura, Ebina, JP;
Naoya Yamasaki, Ebina, JP;
Masayuki Aratake, Ebina, JP;
Shigeru Tsukada, Ebina, JP;
Shunichiro Shishikura, Ebina, JP;
Naoya Yamasaki, Ebina, JP;
Masayuki Aratake, Ebina, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes an image carrier on which an electrostatic latent image is formed, a rotary developing device having N developer carriers on a rotation orbit and moving the N developer carriers to a development position opposite to the image carrier, and a toner concentration sensor that measures toner concentrations of the developers. A measurement position of the toner concentration sensor is set on a second virtual straight line having a first angle toward a first virtual straight line that connects a rotation center of the rotary developing device and the development position. The N developer carriers are placed in turn in an order at the same angular interval as the first angle, and an angular interval between the N-th and first developer carriers is set to a second angle greater than the first angle.