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. 23, 1999
Filed:
Nov. 26, 1997
Applicant:
Inventors:
Bradley Leonard Beach, Lexington, KY (US);
Jean Marie Massie, Lexington, KY (US);
Johnny Dale Massie, II, Lexington, KY (US);
Ronald Lloyd Roe, Lexington, KY (US);
Assignee:
Lexmark International, Inc., Lexington, KY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
4284231 ; 428 369 ; 428 3691 ; 4284258 ; 430110 ; 492 56 ; 492 59 ;
Abstract
An electrophotographic developer roller is made by casting urethane prepolymer mixed with a polybutadiene, a trifunctional curative, ferric chloride powder, and an antioxidant. After curing, the roller is baked, which oxidizes the outer surface. The oxidized surface layer is electrically resistive, which is desirable in a developer roller. An excellent developer roller is achieved at low production cost. The antioxidant provides stable electrical characteristics over extended time periods.