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:
Oct. 26, 1982
Filed:
May. 13, 1980
Applicant:
Inventors:
Steven R Perez, Pittsford, NY (US);
Philip G Horton, Greenville, SC (US);
Jan M Wlochowski, Pittsford, NY (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355 15 ; 430108 ;
Abstract
An electrostatographic development and cleaning system employing electrically insulating carrier particles. The carrier particles comprise a core having magnetic or magnetically-attractable properties which is coated with a polyvinyl acetal. The coated carrier particles have negative triboelectric charging properties and are particularly useful in development systems employing negatively charged photoconductive surfaces. The carrier particles provide efficient removal of residual toner deposits from a photoreceptor surface after a copying operation.