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. 19, 2019
Filed:
Dec. 06, 2017
Synztec Co., Ltd., Tokyo, JP;
SYNZTEC CO., LTD., Tokyo, JP;
Abstract
A charge roller in an image-forming apparatus of a DC electrification mode mitigates occurrence of black lines and prevents fogging. The charge roller has a core, an elastic layer on the core, and a surface treatment layer on the surface of the elastic layer. The elastic layer is a vulcanized rubber composition containing a rubber base mainly containing an epichlorohydrin-based rubber, and additives including a conductivity-imparting agent, an inorganic filler, a vulcanization accelerator, and a vulcanizing agent. The ratio of the conductivity-imparting agent and the inorganic filler, to the entire rubber composition, is 11 mass % or less. The surface treatment layer is formed by impregnating the elastic layer with a surface treatment liquid prepared by dissolving an isocyanate compound in an organic solvent. The roller has a roller surface roughness Rz of 10 μm or less.