Patents by Inventor Karlheinz F. Krussig

Karlheinz F. Krussig 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).

  • Apparatus for coating a web with a viscous coating material
    Patent number: 4335672
    Abstract: An apparatus for coating a moving web with a viscous coating material using an extrusion coating process includes an extrusion coater, a roller for guiding the web, a suction chamber and a die-shaped exhaust device characterized in that the vacuum in the suction chamber is maintained exclusively by exhaustion through a clearance space defined along the back wall of the suction chamber by means of the die-shaped suction apparatus. The cross-sectional area of the exhaust device is from 0.5 to 50 times that of the cross-sectional area of the die slot formed in the exhaust device divided by twice the number of exhaust openings provided therein.
    Type: Grant
    Filed: April 9, 1981
    Date of Patent: June 22, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Karlheinz F. Krussig