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. 26, 1999
Filed:
Jul. 21, 1997
Applicant:
Inventors:
Richard B Lewis, Williamson, NY (US);
William H Wayman, Ontario, NY (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ; G03G / ;
U.S. Cl.
CPC ...
399 99 ; 399266 ; 399291 ;
Abstract
An apparatus for powder cloud development of an electrostatic image in which a donor roll advances toner to a development zone adjacent the image, and in which precipitating electric fields are provided at the entrance and exit of the development zone to redeposit undeveloped toner onto the surface of the doner member, whereby unwanted airborne emissions of toner are substantially reduced.