Patents by Inventor Patrick J. Buttles

Patrick J. Buttles 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).

  • Systems and methods for reducing light shock to a photoreceptive member
    Patent number: 6456805
    Abstract: A light source within a photocopy machine continuously shines high level, wide band fluorescent light on the photoreceptor to maintain the photoreceptor in a uniformly light-shocked condition. This constant level of light shock has no adverse effects on either the life or performance of the photoreceptor in normal operation. Thus, the photoreceptor becomes less sensitive to unintentional, uneven ambient room light and random, long lasting delta voltages within the print area are reduced so that print quality defects are minimized.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: September 24, 2002
    Assignee: Xerox Corporation
    Inventors: Patrick J. Buttles, Moritz P. Wagner, John D. Desmore
  • Systems and methods for reducing light shock to a photoreceptive member
    Patent number: 6246850
    Abstract: A light source within a photocopy machine continuously shines high level, wide band fluorescent light on the photoreceptor to maintain the photoreceptor in a uniformly light-shocked condition. This constant level of light shock has no adverse effects on either the life or performance of the photoreceptor in normal operation. Thus, the photoreceptor becomes less sensitive to unintentional, uneven ambient room light and random, long lasting delta voltages within the print area are reduced so that print quality defects are minimized.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: June 12, 2001
    Assignee: Xerox Corporation
    Inventors: Patrick J. Buttles, Moritz P. Wagner, John D. Desmore