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. 08, 1991
Filed:
Jun. 02, 1989
Applicant:
Inventor:
Gopal C Bhagat, Houston, TX (US);
Assignee:
Compaq Computer Corporation, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355219 ; 361225 ;
Abstract
An apparatus is provided that controls the distribution of charge on the surface of a photoreceptor drum in an electrophotographic printer while reducing the ozone output over that of a standard corotron. The apparatus includes an electrically conductive shaft coated with a semiconductive material disposed longitudinally parallel to the photoreceptor drum. The shaft and semiconductive material are biased into contact with the photoreceptor drum via spring mounted bearings. Thus, rotation of the photoreceptor drum drives the shaft and semiconductive material to rotate about its longitudinal axis.