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. 29, 2010
Filed:
Dec. 22, 2006
Christopher Auguste Dirubio, Webster, NY (US);
Michael F. Zona, Holley, NY (US);
Charles Anthony Radulski, Macedon, NY (US);
Aaron Michael Burry, West Henrietta, NY (US);
Palghat Ramesh, Pittsford, NY (US);
Christopher Auguste DiRubio, Webster, NY (US);
Michael F. Zona, Holley, NY (US);
Charles Anthony Radulski, Macedon, NY (US);
Aaron Michael Burry, West Henrietta, NY (US);
Palghat Ramesh, Pittsford, NY (US);
Xerox Corporation, Norwalk, CT (US);
Abstract
The dielectric thickness of a photoreceptor is determined in a variety of ways, including using a relationship between threshold voltage and dielectric thickness, using a relationship between dielectric thickness and the difference between biased transfer roller (BTR) voltage and photoreceptor surface potential, using a relationship between dielectric thickness and biased charging roller (BCR) impedance, using a relationship between dielectric thickness and the slope of the DC current vs. voltage curve for the BTR or the BCR, and using a relationship between dielectric thickness and the BTR voltage at zero current. The threshold voltage can be found by using the slope of the BCR DC current vs. voltage curve, measuring photoreceptor surface potential for a plurality of target values below the charging knee to obtain the intercept value, or finding the actual value of the charging knee. A method of using the BCR as an electrodynamic voltmeter is also disclosed.