Patents by Inventor Raimo Tuhkanen

Raimo Tuhkanen 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).

  • Coater
    Patent number: 4822640
    Abstract: An appliance for a double-sided coating of a moving web by means of two coating substance applicators and a smoothing nip comprising a back-up roll on one side of the web and a adjustable levelling blade or the like on the other side of the web. The coating substance is supplied on the web directly on the side facing the levelling blade and on the surface of the back-up roll or the web on the other side of the web. The smoothing nip and the both applicators are located within a 30 degrees sector of the back-up roll, preferably within a 20 degrees sector.
    Type: Grant
    Filed: September 14, 1984
    Date of Patent: April 18, 1989
    Assignee: Oy Wartsila Ab
    Inventors: Raimo Tuhkanen, Markku Grasten, Sivert Westergard