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:
Dec. 16, 2014
Filed:
Sep. 27, 2012
Oki Data Corporation, Tokyo, JP;
Junichi Kawashima, Tokyo, JP;
OKI Data Corporation, Tokyo, JP;
Abstract
A developing device includes a developer supporting member having an elastic layer and a surface layer covering the elastic layer for supporting developer; and a developer layer regulating member arranged to abut against the surface layer for regulating a layer thickness of the developer on the surface layer. The surface layer contains at least carbon black. The developer supporting member is configured so that the following equation (1) is satisfied when the surface layer has a dynamic friction coefficient μ between 0.4 and 0.9 (0.4≦μ≦0.9) and a ten-point average roughness Rz (μm) between 2 μm and 6 μm (2≦Rz≦6):2≦≦0.5×+3  (1)where C is a content of the carbon black (weight parts relative to the surface layer of 100).