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:
Nov. 07, 1989
Filed:
Apr. 19, 1988
Saied A Mabrouk, Boulder, CO (US);
Gerald L Wheeler, Longmont, CO (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The saturation voltage of a photoconductor used in a discharged area development (DAD) reproduction device is used to control and maintain the voltage vectors that are associated with (1) the photoconductor's fully charged background area, (2) the development electrode voltage at the reproduction device's developer station, (3) the photoconductor voltage in areas that are occupied by image characters having a small surface area, and (4) the photoconductor voltage in a test patch area that is associated with a toner concentration control network having a toner patch sensor. These electrstatic parameters are periodically adjusted, to compensate for changes in the operating characteristics of the photoconductor and the imaging station.