Patents by Inventor Kari Hyvönen

Kari Hyvönen 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).

  • Patent number: 7306704
    Abstract: A method of manufacturing a press felt, a press section, and a press felt. The press felt comprises a base structure (11), a batt fibre layer (12) being attached to a first, web-side surface (B) of the base structure. Further, the structure of the press felt is compacted by treating it with a polymer material at least on the side of the first felt surface (B). After the polymer treatment, the surface of the felt is ground smooth.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: December 11, 2007
    Assignee: Tamfelt Oyj ABP
    Inventor: Kari Hyvönen
  • Patent number: 6797121
    Abstract: A method of manufacturing a press felt, a press felt and a base fabric. The press felt comprises a base fabric with a batt fiber layer attached on at least the surface facing a paper web. The base fabric is a laminate comprising at least two separate layers. For the base fabric, one or more base fabric modules are provided, which are assembled with a butt seam into a closed loop.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: September 28, 2004
    Assignee: Tamfelt Oyj ABP
    Inventors: Kari Hyvönen, Heikki Rehakka, Tauno Virtanen
  • Patent number: 6773553
    Abstract: A method of making a press felt, a press felt and a base fabric. The base fabric comprises a surface component on the surface facing the paper web to be dried and a base component below the surface component. The transverse jointing edges of the base component are provided with seam loops, by means of which the base component can be connected into a closed loop. At the first jointing edge of the base fabric the surface component extends for a predetermined distance longer than the base component and forms a seam flap that protects the seam area of the base component.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: August 10, 2004
    Assignee: Tamfelt Oyj Abp
    Inventors: Kari Hyvönen, Heikki Rehakka, Tauno Virtanen
  • Patent number: 6770172
    Abstract: A method of making a press felt, and a press felt. The press felt comprises a continuous base fabric in the lateral direction, and at least one batt fiber layer. The closed-loop base fabric is made of longitudinal and transverse yarns. The properties of the press felt, such as permeance, are arranged to be different in edge portions of the press felt from the midportion of the felt.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: August 3, 2004
    Assignee: Tamfelt Oyj Abp
    Inventors: Bo Rökman, Kari Hyvönen, Tauno Virtanen