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:
Nov. 20, 2012
Filed:
Mar. 22, 2010
Applicants:
Toru Iwanami, Ebina, JP;
Gen Nakajima, Ebina, JP;
Inventors:
Toru Iwanami, Ebina, JP;
Gen Nakajima, Ebina, JP;
Assignee:
Fuji Xerox Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G 15/01 (2006.01); G03G 15/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A developing device comprises a developer unit that contains a developer including a color material and a magnetic powder, the color material being used to develop an electrostatic latent image held by an image holding member; a collecting unit that collects a part of the developer contained in the developer unit via a passage; and a measuring unit that measures a concentration of the color material included in the developer based on a magnetic property of the developer moving through the passage.