Patents Assigned to Sunds Defibrator Industries
  • Patent number: 5034175
    Abstract: Methods for manufacturing fiber board sheets from defibered lignocellulose-containing material are disclosed, including drying the defibered lignocellulose-containing material with heated gas in a tube dryer, transferring the dried lignocellulose-containing material directly to a forming station, and forming the dried lignocellulose-containing material into a fiber web at the forming station whereby the temperature of the dried lignocellulose-containing material is substantially maintained from the drying step to the forming station. Apparatus for manufacturing fiber board sheets utilizing this method are also disclosed.
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: July 23, 1991
    Assignee: Sunds Defibrator Industries Aktiebolag
    Inventor: Christer K. S. Safstrom
  • Patent number: 4973000
    Abstract: Methods for determining the contact position between a pair of relatively rotating refining surfaces are disclosed including detecting the heat radiating from the initial contact between the pair of refining surfaces during relative rotation therebetween in order to generate an output signal and utilizing the output signal to determine the contact position. Apparatus for determining the contact position is also disclosed.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: November 27, 1990
    Assignee: Sunds Defibrator Industries Aktiebolag
    Inventors: Bengt O. Akerblom, Bengt O. Lofqvist