Patents by Inventor Chris Mulhearn

Chris Mulhearn 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).

  • Method of adjusting strobe length in a thermal printer to reduce effects of changes in media transport speed
    Patent number: 7256805
    Abstract: A thermal printing apparatus and a method of controlling a thermal printing apparatus is provided wherein the duration of the strobe pulse utilized to transfer the ink from the carrier to the media is controlled and adjusted by a correction factor. The correction factor is calculated by the printer controller based directly on feedback regarding the actual transport time required to advance the media between encoder steps. Generally, the present invention controls a thermal printer in a manner that accounts for the transport speed between each encoder step and applies the correction factor to the strobe signal duration in a manner that maintains a uniform print density.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: August 14, 2007
    Assignee: Astro-Med, Inc.
    Inventors: Chris Mulhearn, James E. Shaw, III
  • Method of adjusting strobe length in a thermal printer to reduce effects of changes in media transport speed
    Publication number: 20060176358
    Abstract: A thermal printing apparatus and a method of controlling a thermal printing apparatus is provided wherein the duration of the strobe pulse utilized to transfer the ink from the carrier to the media is controlled and adjusted by a correction factor. The correction factor is calculated by the printer controller based directly on feedback regarding the actual transport time required to advance the media between encoder steps. Generally, the present invention controls a thermal printer in a manner that accounts for the transport speed between each encoder step and applies the correction factor to the strobe signal duration in a manner that maintains a uniform print density.
    Type: Application
    Filed: February 4, 2005
    Publication date: August 10, 2006
    Inventors: Chris Mulhearn, James Shaw