Patents by Inventor Stig Lennartsson

Stig Lennartsson 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 of drying lignocellulose material
    Patent number: 6820350
    Abstract: Methods for drying fibrous lignocellulosic material are provided in connection with the manufacture of fiberboard. The fibrous material is transported with a first drying gas through a first drying line to a first cyclone where the first drying gas in conducted away from the fibrous material. Thereafter, the material is transported with a second drying gas through a second drying line to a second cyclone, where the second drying gas is conducted away while the fibrous material is advanced to a subsequent step. The second drying gas, which is conducted away from the second cyclone, is recirculated to the first drying step and used as a portion of the first drying gas. A portion of the first drying gas, which is conducted away from the first cyclone, is recirculated and used as drying gas at the first drying step.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: November 23, 2004
    Assignee: Valmet Fibertech AB
    Inventors: Lennart V. Eriksson, Stig Lennartsson