Patents by Inventor David Norman Ruff

David Norman Ruff 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).

  • Moveable sensor array and method of detecting location of calibration fault
    Patent number: 8052244
    Abstract: A printing device comprises a print head, imaging member, and a moveable sensor array. The print head is configured to deliver marking material to the imaging member as it moves in a process direction. The linear sensor array comprises a plurality of photo sensors configured to scan the imaging member. The photo detectors of the linear sensor array define a sensor axis that is substantially perpendicular to the process direction. The linear sensor array is configured to move along the sensor axis between a first position where the sensor array scans one portion of the imaging member and a second position where the sensor array scans another portion of the imaging member. If a fault is detected during calibration of the sensor array, the moveable sensor array may be used to determine whether the source of the fault rests with the imaging member or the sensor array.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: November 8, 2011
    Assignee: Xerox Corporation
    Inventors: David Norman Ruff, Cary Eric Sjolander, Scott J. Phillips, Kenneth R. Ossman, Barry Daniel Reeves
  • Moveable Sensor Array and Method of Detecting Location of Calibration Fault
    Publication number: 20100219328
    Abstract: A printing device comprises a print head, imaging member, and a moveable sensor array. The print head is configured to deliver marking material to the imaging member as it moves in a process direction. The linear sensor array comprises a plurality of photo sensors configured to scan the imaging member. The photo detectors of the linear sensor array define a sensor axis that is substantially perpendicular to the process direction. The linear sensor array is configured to move along the sensor axis between a first position where the sensor array scans one portion of the imaging member and a second position where the sensor array scans another portion of the imaging member. If a fault is detected during calibration of the sensor array, the moveable sensor array may be used to determine whether the source of the fault rests with the imaging member or the sensor array.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 2, 2010
    Applicant: XEROX CORPORATION
    Inventors: David Norman Ruff, Cary Eric Sjolander, Scott J. Phillips, Kenneth R. Ossman, Barry Daniel Reeves