Patents by Inventor Paul Charles Julien

Paul Charles Julien 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).

  • Photoconductor life through active control of charger settings
    Patent number: 7715742
    Abstract: Xerographic photoreceptor life is improved while maintaining output print quality by adjusting the AC charging actuator of a xerographic machine to a point at which photoconductor life is optimized while maintaining output print quality. Where the actuator is voltage, the actuator is set a predetermined amount above the knee voltage of the photoreceptor surface potential versus peak-to-peak voltage curve, which is determined during operation of the machine. Instead of determining the knee voltage, calibration sheets can be generated for various values of the actuator, the best sheet with the least possible actuator value is selected, and the AC charging actuator is set to the value corresponding to the best sheet. The sheets can be evaluated by a user, or an optical array sensor can be used to scan the sheets so that the controller can compare the sheets to stored criteria to automatically select the best sheet and set the actuator.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: May 11, 2010
    Assignee: Xerox Corporation
    Inventors: Aaron Michael Burry, Christopher Auguste DiRubio, Paul Charles Julien, Eric Scott Hamby, Palghat Ramesh, Michael F. Zona, William C. Dean
  • Photoconductor life through active control of charger settings
    Publication number: 20080152371
    Abstract: Xerographic photoreceptor life is improved while maintaining output print quality by adjusting the AC charging actuator of a xerographic machine to a point at which photoconductor life is optimized while maintaining output print quality. Where the actuator is voltage, the actuator is set a predetermined amount above the knee voltage of the photoreceptor surface potential versus peak-to-peak voltage curve, which is determined during operation of the machine. Instead of determining the knee voltage, calibration sheets can be generated for various values of the actuator, the best sheet with the least possible actuator value is selected, and the AC charging actuator is set to the value corresponding to the best sheet. The sheets can be evaluated by a user, or an optical array sensor can be used to scan the sheets so that the controller can compare the sheets to stored criteria to automatically select the best sheet and set the actuator.
    Type: Application
    Filed: December 22, 2006
    Publication date: June 26, 2008
    Inventors: Aaron Michael Burry, Christopher Auguste DiRubio, Michael F. Zona, Paul Charles Julien, Eric Scott Hamby, Palghat Ramesh, William C. Dean