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:
Feb. 15, 1994
Filed:
Sep. 26, 1991
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A developing apparatus for developing an electrostatic latent image having a movable developer carrying member for carrying one component developer to a developing zone where the developer carrying member is opposed to a latent image bearing member for carrying the electrostatic latent image, the developer carrying member being effective to triboelectrically charge the developer to a polarity for developing the latent image; a regulating member for regulating a thickness of a layer of the developer to be carried to the developing zone; a voltage source for applying a developing bias voltage to the developer carrying member; wherein the developer carrying member has a base member having a surface sandblasted to have an average surface roughness of 1.0-3.0 microns, and an outer layer thereon in which fine graphite particles are dispersed in a binder resin material, and wherein the outer layer has an average surface roughness of 0.8-2.5 microns.