Patents by Inventor Karl E. Hansen

Karl E. Hansen 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 and a system for separating an aqueous suspension containing fibrous particles into fractions of different average characteristics
    Patent number: 4288317
    Abstract: A method and system for separating an aqueous suspension containing fibrous particles into fractions of different average characteristics. The suspension to be separated is supplied to a separator disc rotating in a horizontal plane in the upper part of a chamber, in which collecting means are arranged in different zones to receive material dispersed from the disc. The method and system are effective for the separation of paper pulp suspensions such as groundwood pulp, chemical pulp, sediment or waste paper pulp into fractions of different fibre size and for the cleaning of paper pulp suspensions for impurity particles such as sand, shives and splinters. Another field of application is the separation of mineral wool suspensions into fractions consisting mainly of fibrous and spherical particles, respectively.
    Type: Grant
    Filed: May 11, 1979
    Date of Patent: September 8, 1981
    Assignee: A/S Niro Atomizer
    Inventors: Alfonso de Ruvo, Bo Norman, Geoffrey G. Duffy, Klaus Moller, Karl E. Hansen, Karsten S. Felsvang, Erik Liborius
  • Fibre-reinforced product and method of preparing same
    Patent number: 4263049
    Abstract: A fibre-reinforced cementitious product comprising a fibre reinforcement, at least partly consisting of eucalyptus fibres.
    Type: Grant
    Filed: October 9, 1979
    Date of Patent: April 21, 1981
    Assignee: Rockwool International A/S
    Inventors: Karl E. Hansen, Peder Pedersen