Patents by Inventor Christopher Augusto DiRubio

Christopher Augusto DiRubio has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of using biased charging/transfer roller as in-situ voltmeter and photoreceptor thickness detector and method of adjusting xerographic process with results
    Publication number: 20080152369
    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.
    Type: Application
    Filed: December 22, 2006
    Publication date: June 26, 2008
    Inventors: Christopher Augusto DiRubio, Michael F. Zona, Charles Anthony Radulski, Aaron Michael Burry, Palghat Ramesh