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. 21, 2000
Filed:
Jul. 12, 1999
Applicant:
Inventors:
Ronald Lloyd Roe, Lexington, KY (US);
Edward Wayne Weidert, Superior, CO (US);
Assignee:
Lexmark International, Inc., Lexington, KY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
4284231 ; 428 3691 ; 4284258 ; 430110 ; 492 56 ; 492 59 ;
Abstract
A roller for electrophotography is made from a mixture of polyurethane, polydiene, polyether diol, a first conductive filler and a second conductive filler which catalyzes oxidation of the polydiene. The first conductive filler comprises hexahalogenated acetylacetonates. The roller has a very high outer surface electrical resistance from baking the roller to oxidize the polybutadiene. The charge roller is achieved at low production cost and functions well with charging by a DC potential and AC overlay.