Patents by Inventor Marita Järvinen

Marita Järvinen 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 apparatus for treating pulp
    Patent number: 7951263
    Abstract: A method of dividing a suspension, especially a fiber suspension into an accept fraction and a fraction containing impurity particles in a centrifugal cleaning plant having at least two stages. The suspension is fed to a preceding stage, wherefrom a heavier fraction of the suspension is taken as accept fraction and a lighter fraction is taken as fraction containing impurity particles. The lighter fraction containing impurity particles is fed into a latter stage of the centrifugal cleaning plant. Before being fed to the latter stage, the feed consistency of the lighter fraction is increased.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: May 31, 2011
    Assignee: Andritz Oy
    Inventors: Marita Järvinen, Kimmo Nurminen