Patents by Inventor Lars Holmsten

Lars Holmsten 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).

  • Refining element
    Patent number: 7513451
    Abstract: A refining element for use in the refining of fibrous materials is disclosed in which the refining surface includes an inner portion and an outer portion defining a transition region between these two portions, a plurality of bars and grooves in the inner portion of the refining surface, and a plurality of bars and intermediate grooves in the outer portion of the refining surface, the bars in the inner surface having a greater width than those in the outer surface, and the transition region having a varying distance from the inner edge of the refining element across the refining surface.
    Type: Grant
    Filed: January 17, 2005
    Date of Patent: April 7, 2009
    Assignee: Metso Paper, Inc.
    Inventors: Nils Virving, Pertti Purolainen, Lars Holmsten
  • Refining element
    Publication number: 20070095962
    Abstract: A refining element for use in the refining of fibrous materials is disclosed in which the refining surface includes an inner portion and an outer portion defining a transition region between these two portions, a plurality of bars and grooves in the inner portion of the refining surface, and a plurality of bars and intermediate grooves in the outer portion of the refining surface, the bars in the inner surface having a greater width than those in the outer surface, and the transition region having a varying distance from the inner edge of the refining element across the refining surface.
    Type: Application
    Filed: January 17, 2005
    Publication date: May 3, 2007
    Applicant: Metso Paper, Inc.
    Inventors: Nils Virving, Pertti Purolainen, Lars Holmsten