Patents by Inventor John Roy Washington

John Roy Washington 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).

  • Dual function charging device and charge patterning device cleaner
    Patent number: 8340546
    Abstract: A printing apparatus includes a charging device and a photoreceptor adjacent the charging device. The charging device transfers a charge to the photoreceptor. Also, a charge patterning device is adjacent the photoreceptor. The patterning device patterns the charge on the photoreceptor to form a latent image charge. Additionally, an automated cleaning device is adjacent the charging device. The charge patterning device periodically moves by the charging device and the charge patterning device to simultaneously clean the charging device and the charge patterning device.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: December 25, 2012
    Assignee: Xerox Corporation
    Inventor: John Roy Washington
  • DUAL FUNCTION CHARGING DEVICE AND CHARGE PATTERNING DEVICE CLEANER
    Publication number: 20110243597
    Abstract: A printing apparatus includes a charging device and a photoreceptor adjacent the charging device. The charging device transfers a charge to the photoreceptor. Also, a charge patterning device is adjacent the photoreceptor. The patterning device patterns the charge on the photoreceptor to form a latent image charge. Additionally, an automated cleaning device is adjacent the charging device. The charge patterning device periodically moves by the charging device and the charge patterning device to simultaneously clean the charging device and the charge patterning device.
    Type: Application
    Filed: April 6, 2010
    Publication date: October 6, 2011
    Applicant: XEROX CORPORATION
    Inventor: John Roy Washington