Patents by Inventor Esko Nyberg

Esko Nyberg 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).

  • Press felt with asymetric fiber crosssection in a surface layer of lowest permeability
    Patent number: 4988409
    Abstract: A press felt (4) is provided for transporting a fibre web (3) through the press section of a paper making machine for efficiently receiving water from the fibre web (3), the press felt (4) includes at least one fabric layer and a surface layer on both sides of the felt (4), the air permeability of both surface layers being substantially smaller than that of all fabric layers. In order to make the removal of water more efficient and to avoid the rewetting of the web, the air permeability of surface layer of the press felt away from the fibre web is substantially smaller than the air permeability of the surface layer on the opposite side of the press felt, i.e., the side adjacent the web.
    Type: Grant
    Filed: May 31, 1989
    Date of Patent: January 29, 1991
    Assignee: Tamfeit Oy AB
    Inventor: Esko Nyberg