Patents by Inventor David Robert Kretschmann

David Robert Kretschmann 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).

  • MULTIPLE BEAM ROS WITH ADJUSTABLE SWATH WIDTH AND SPACING USING ADJUSTABLE OPTICAL DEVICE
    Publication number: 20120293596
    Abstract: Multiple beam raster output scanners (ROSs) and printing systems are presented in which an adjustable mirror or lens is provided in the optical beam path upstream of the ROS polygon mirror to allow automated electronic adjustment of line-to-line and swath-to-swath spacing at runtime.
    Type: Application
    Filed: May 17, 2011
    Publication date: November 22, 2012
    Applicant: XEROX CORPORATION
    Inventors: Jonathan B. Hunter, David Robert Kretschmann, David Mark Kerxhalli, Ronald W. Bogert
  • Method and apparatus for printing various sheet sizes within a pitch mode in a digital printing system
    Patent number: 8295749
    Abstract: A method of controlling the inverter dwell time of the first print engine in order to print any sheet size within a pitch mode without the need for a belt sync dead-cycle. The method uses a small nominal inverter dwell time based on the maximum sheet size for a given pitch mode. For any sheet size within the pitch mode that is smaller than the maximum sheet size, the inverter dwell time will increase proportionally.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: October 23, 2012
    Assignee: Xerox Corporation
    Inventors: David Mark Kerxhalli, David Robert Kretschmann
  • Controlling sheet registration in a digital printing system
    Patent number: 8254825
    Abstract: A digital printing system employing tandem marking engines for duplex printing utilizing a variable dwell time in the output sheet inverter of the first marking engine to provide correct positioning of the leading edge of the inverted sheet for arrival at the entrance of the second marking to avoid the seam in the photoreceptor.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: August 28, 2012
    Assignee: Xerox Corporation
    Inventors: Ana P. Tooker, Michael James Diehl, Colleen R. Enzien, Thomas Edward Higgins, David Robert Kretschmann, Carlos A. Lopez, Andrew James Bonacci, Jacqueline Yvonne Tyson
  • METHOD AND APPARATUS FOR PRINTING VARIOUS SHEET SIZES WITHIN A PITCH MODE IN A DIGITAL PRINTING SYSTEM
    Publication number: 20110299889
    Abstract: A method of controlling the inverter dwell time of the first print engine in order to print any sheet size within a pitch mode without the need for a belt sync dead-cycle. The method uses a small nominal inverter dwell time based on the maximum sheet size for a given pitch mode. For any sheet size within the pitch mode that is smaller than the maximum sheet size, the inverter dwell time will increase proportionally.
    Type: Application
    Filed: June 2, 2010
    Publication date: December 8, 2011
    Applicant: XEROX CORPORATION
    Inventors: David Mark Kerxhalli, David Robert Kretschmann
  • CONTROLLING SHEET REGISTRATION IN A DIGITAL PRINTING SYSTEM
    Publication number: 20100209161
    Abstract: A digital printing system employing tandem marking engines for duplex printing utilizing a variable dwell time in the output sheet inverter of the first marking engine to provide correct positioning of the leading edge of the inverted sheet for arrival at the entrance of the second marking to avoid the seam in the photoreceptor.
    Type: Application
    Filed: February 18, 2009
    Publication date: August 19, 2010
    Applicant: Xerox Corporation
    Inventors: Ana P. Tooker, Michael James Diehl, Colleen R. Enzien, Thomas Edward Higgins, David Robert Kretschmann, Carlos A. Lopez, Andrew James Bonacci, Jacqueline Yvonne Tyson
  • CONTROLLING DIGITAL PRINTING
    Publication number: 20100149229
    Abstract: A method and system for digital printing with plural marking engines in which a controller determines which of the marking engines has first completed its initialization/warm-up cycle and begins printing on that marking engine. As additional marking engines complete their initialization/warm-up cycle, additional concurrent printing is commenced on them.
    Type: Application
    Filed: December 16, 2008
    Publication date: June 17, 2010
    Applicant: XEROX CORPORATION
    Inventors: Michael James Diehl, Andrew James Bonacci, Colleen R. Enzien, Thomas Edward Higgins, David Robert Kretschmann, Carlos A. Lopez, Ana Perez Tooker, Jacqueline Yvonne Tyson