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. 16, 1976
Applicant:
Inventors:
Delmer G Parker, Irondequoit, NY (US);
Lawrence J Fraser, Rochester, NY (US);
Joseph L Scaletta, Henrietta, NY (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Primary Examiner:
Int. Cl.
CPC ...
G03G / ; G03G / ;
U.S. Cl.
CPC ...
118653 ; 118657 ; 355 / ; 428 18 ;
Abstract
A magnetizable donor is magnetized to define a microfield with a characteristic spacing between pole centers of about 0.010 inches. The strong short range fields between poles pick up and hold a thin uniform and continuous layer of magnetic toner. The layer of toner is then electrostatically charged and brought into close proximity to a receptor, without touching the same, where only latent image areas of the receptor attract toner from the donor layer.