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:
Jun. 18, 1991
Filed:
May. 08, 1989
Applicant:
Inventors:
Assignee:
Savin Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355265 ; 118647 ; 355246 ;
Abstract
A voltage waveform is applied to a development electrode in an electrophotographic apparatus to assist in the cleaning of the development electrode without degrading the photoconductor surface with excessive toner particles. The waveform establishes a bias voltage of one polarity on which are impressed pulses of the other polarity of sufficient amplitude and duration to dislodge charged toner particles from the surface of the development electrode, but insufficient to move the toner particles to the photoconductor surface.