Patents by Inventor Gregg A. Guarino

Gregg A. Guarino 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).

  • Reflex printing with process direction stitch error correction
    Patent number: 7510256
    Abstract: A reflex printing device having multiple print heads mounted at different locations around the circumference of the drum at different “angles” and an encoder disk mounted on the drum to allow for detection of the drum position as a function of time. An image defect due to a misalignment in the print process direction of the output from the multiple print heads is corrected by detection of an encoder position error function subtracted from itself shifted by the angle between the print heads.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: March 31, 2009
    Assignee: Xerox Corporation
    Inventors: Gregg A. Guarino, Daniel W. Costanza, Martin E. Hoover, James P. Calamita, Abu S. Islam
  • Encoder runout error correction circuit
    Patent number: 7280049
    Abstract: A novel encoder system adapted for use in print architecture at least includes: a codewheel coupled to a rotating print architecture element; a first encoder sensor mounted at a first position relative to the periphery of the codewheel, the first encoder adapted to output a first output signal; a second sensor mounted at a second position relative to the periphery of the codewheel, the second encoder adapted to output a second output signal, and the second sensor positioned substantially 180 degrees relative to the first encoder sensor; and a logic correction circuit adapted to receive the first and second output signals, and for outputting a correction signal with a period that is the average of the periods of the first and second output signals.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: October 9, 2007
    Assignee: Xerox Corporation
    Inventor: Gregg A. Guarino
  • Reflex printing with process direction stitch error correction
    Publication number: 20060221124
    Abstract: A reflex printing device having multiple print heads mounted at different locations around the circumference of the drum at different “angles” and an encoder disk mounted on the drum to allow for detection of the drum position as a function of time. An image defect due to a misalignment in the print process direction of the output from the multiple print heads is corrected by detection of an encoder position error function subtracted from itself shifted by the angle between the print heads.
    Type: Application
    Filed: March 30, 2005
    Publication date: October 5, 2006
    Applicant: XEROX CORPORATION
    Inventors: Gregg Guarino, Daniel Costanza, Martin Hoover, James Calamita, Abu Islam
  • Encoder runout error correction circuit
    Publication number: 20050253054
    Abstract: A novel encoder system adapted for use in print architecture at least includes: a codewheel coupled to a rotating print architecture element; a first encoder sensor mounted at a first position relative to the periphery of the codewheel, the first encoder adapted to output a first output signal; a second sensor mounted at a second position relative to the periphery of the codewheel, the second encoder adapted to output a second output signal, and the second sensor positioned substantially 180 degrees relative to the first encoder sensor; and a logic correction circuit adapted to receive the first and second output signals, and for outputting a correction signal with a period that is the average of the periods of the first and second output signals.
    Type: Application
    Filed: May 17, 2004
    Publication date: November 17, 2005
    Inventor: Gregg Guarino