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. 10, 1978
Filed:
Jul. 30, 1976
Applicant:
Inventor:
Virgil William Westdale, Chagrin Falls, OH (US);
Assignee:
Addressograph Multigraph Corporation, Cleveland, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ; G03G / ; B32B / ;
U.S. Cl.
CPC ...
427 18 ; 252 / ; 427 20 ; 427216 ; 427221 ; 428404 ; 428406 ; 428407 ; 428421 ; 526-5 ;
Abstract
Carrier particles for use in an electrophotographic process are prepared by applying a mixture of a perfluoro acid and polyvinylidene fluoride to the surface of the carrier particle. The resulting carriers are long lived, abrasion resistant and capable of imparting a high triboelectric charge to electroscopic powders mixed therewith.