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:
Sep. 22, 2009
Filed:
Jan. 16, 2007
Palghat S. Ramesh, Pittsford, NY (US);
Aaron M. Burry, West Henrietta, NY (US);
Christopher A. Dirubio, Webster, NY (US);
William C. Dean, Webster, NY (US);
Palghat S. Ramesh, Pittsford, NY (US);
Aaron M. Burry, West Henrietta, NY (US);
Christopher A. Dirubio, Webster, NY (US);
William C. Dean, Webster, NY (US);
Xerox Corporation, Norwalk, CT (US);
Abstract
A xerographic marking engine adjusts a charging actuator, such as an AC peak-to-peak voltage or an AC peak-to-peak AC current, based upon toner patch density measurements made using, e.g., a toner patch density sensor. The sensor is used to detect a knee in a toner mass density curve obtained by sweeping an AC peak-to-peak voltage or an AC peak-to-peak current. Once the knee is located, an AC charging actuator peak-to-peak voltage or AC peak-to-peak current is determined that reduces the amount of positive charge that is deposited onto the surface of the photoconductor, thereby extending its life while maintaining acceptable print quality. The described approach may improve photoconductor life without significantly increasing production costs or complexity.