Patents by Inventor Derek A. Twitchen

Derek A. Twitchen 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).

  • Calender hood
    Patent number: 6207019
    Abstract: A calender hood for a paper machine having a dryer section and a calender section the hood extending along a portion of the paper path from the dryer section through the calender section to restrict movement of the ambient air into the region between the surface of the paper sheet and the calender hood and thereby reduce heat losses to the ambient air by the paper sheet.
    Type: Grant
    Filed: August 18, 1995
    Date of Patent: March 27, 2001
    Assignee: Abitibi-Price, Inc.
    Inventors: Jake Zwart, Derek A. Twitchen