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:
Jul. 21, 1992
Filed:
May. 25, 1990
Applicant:
Inventors:
Ronald W Baker, Versailles, KY (US);
John A Thompson, Lexington, KY (US);
Assignee:
Lexmark International, Inc., Greenwich, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01B / ;
U.S. Cl.
CPC ...
252500 ; 29132 ; 428375 ; 428379 ; 428390 ; 252 50 ; 524236 ;
Abstract
A rubber developer roller having a quaternary ammonium material as an antistatic agent to achieve an approximately one order of magnitude increase in the level of conductivity. This provides consistent printing over a range of temperatures of operation, particularly at start-up when the printer has not reached its designed operating temperature, and over a range of environmental conditions. This roller also permits the increase of print speed.