Patents by Inventor Robert Daunais

Robert Daunais 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).

  • Wet cellulosic web transfer method using air doctor blade
    Patent number: 5232555
    Abstract: A transfer system for transferring a moving wet cellulosic web between two moving elements of a paper machine without excessive sheet flutter or breakage, supports the web and permits higher web speeds than presently used. The transfer system comprises a suction roll that forms a nip in contact with the web on the surface of a roll or web supporting belt, a doctor blade positioned in contact with the surface of the roll or web supporting belt immediately after the nip to ensure the web separates from the surface, and an air jet adjacent the doctor blade that blows air in a direction substantially opposite the moving web, between the moving web and the surface of the roll or web supporting belt, to guide and support the web towards the suction roll.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: August 3, 1993
    Assignee: Pulp and Paper Research Institute of Canada
    Inventors: Robert Daunais, J. David McDonald, Ian T. Pye, Ivan I. Pikulik