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:
Jan. 13, 2015
Filed:
May. 08, 2008
Hirotaka Tagawa, Yokohama, JP;
Kota Kawano, Yokohama, JP;
Takayuki Sugimura, Yokohama, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
An electrically conductive roller which may easily obtain a desired surface roughness, and which has good setting property without problems such as high cost and compression set is provided. An electrically conductive rollercomprises a shaft, an elastic layersupported on the periphery of the shaft and one surface layerformed on the peripheral surface of the elastic layer. The elastic layeris composed of a urethane foam in which the degree of swelling is not more than 120% with respect to the solvent used in the formation of the surface layer. The urethane foam preferably contains, as a polyol component, a polyester polyol having a hydroxyl value of 200 to 400 and 3 or more functional groups.