Patents by Inventor Tauno Virtanen

Tauno Virtanen 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: 8308910
    Abstract: A method for manufacturing a press felt with a seam, to a press felt, and a base fabric of a press felt. The base fabric is a one-base structure with machine direction yarns forming seam loops and further machine direction yarns running in the web-side surface layer. The machine direction yarns weave with cross yarns. The yarn ratio of the surface layer machine direction yarns to the intermediate layer and further the bottom layer machine direction yarns is at least 2:1:1. In addition, the surface layer machine direction yarns have a long run and their cross-sectional area is smaller than the yarns forming the seam loops.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: November 13, 2012
    Assignee: Metso Fabrics, Inc.
    Inventors: Kati Mikkonen, Tauno Virtanen
  • Publication number: 20110186256
    Abstract: A method for manufacturing a press felt with a seam, to a press felt, and a base fabric of a press felt. The base fabric is a one-base structure with machine direction yarns forming seam loops and further machine direction yarns running in the web-side surface layer. The machine direction yarns weave with cross-yarns. The yarn ratio of the surface layer machine direction yarns to the intermediate layer and further the bottom layer machine direction yarns is at least 2:1:1. In addition, the surface layer machine direction yarns have a long run and their cross-sectional area is smaller than the yarns forming the seam loops.
    Type: Application
    Filed: September 24, 2008
    Publication date: August 4, 2011
    Applicant: TAMFELT PMC OY
    Inventors: Kati Mikkonen, Tauno Virtanen
  • 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
  • Publication number: 20040074624
    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: Application
    Filed: May 16, 2003
    Publication date: April 22, 2004
    Applicant: TAMFELT OYJ ABP
    Inventors: Kari Hyvonen, Heikki Rehakka, Tauno Virtanen
  • Publication number: 20040020622
    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 fibre 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: Application
    Filed: May 16, 2003
    Publication date: February 5, 2004
    Applicant: TAMFELT OYJ ABP
    Inventors: Kari Hyvonen, Heikki Rehakka, Tauno Virtanen
  • Publication number: 20030192665
    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 fibre 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: Application
    Filed: May 16, 2003
    Publication date: October 16, 2003
    Applicant: TAMFELT OYJ ABP
    Inventors: Bo Rokman, Kari Hyvonen, Tauno Virtanen