Patents by Inventor Erkki Kärkkäinen

Erkki Kärkkäinen 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).

  • Method, arrangement and equipment for tensioning and guiding a fabric in a paper or board machine
    Patent number: 7429310
    Abstract: A paper or board machine has a fabric (10) that is adapted mobile as well as rolls (11, 11?) arranged to support the fabric (10). The fabric (10) is tensioned by changing the position of one roll (11?) of the rolls (11, 11?). Correspondingly, the fabric (10) is guided by changing the alignment of one roll (11?) of the said rolls (11, 11?). Surprisingly the fabric (10) is both tensioned and guided by changing the alignment and position of only one and the same roll (11?). In addition, the wrap angle of the fabric (10) at this roll (11?) is set higher than 30°.
    Type: Grant
    Filed: May 4, 2004
    Date of Patent: September 30, 2008
    Assignee: Metso Paper, Inc.
    Inventors: Pertti K. Heikkilä, Erkki Kärkkäinen, Erkka Nieminen, Samppa J. Salminen, Veli-Matti Vainio
  • Web guide in a paper machine/board machine
    Patent number: 6627044
    Abstract: The invention concerns a guide (10) for the web, such as the wire or felt, in a paper machine/board machine. The guide is formed by a bearing housing (12) at one end of a guiding roller (11) in such a way that the bearing housing (12) includes a curved surface as the rolling surface (13). An actuator (14) is adapted to roll the bearing housing along a stop face (T1), whereby by using the actuator (14) an essentially linear transfer is given to a shaft stub (11a1) pivoted by a bearing (15a1) in the bearing housing (12).
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: September 30, 2003
    Assignee: Metso Paper, Inc.
    Inventors: Jari Suortti, Ville Nenonen, Risto Väätäinen, Erkki Kärkkäinen, Kari Paloniemi, Samppa J. Salminen