Patents by Inventor Seppo Virea

Seppo Virea 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).

  • Apparatus for treating a fibrous material
    Patent number: 4518500
    Abstract: An apparatus for treating a fibrous material, e.g. for fiberizing and screening of waste paper, comprises a rotating drum which is provided with at least one partially perforated mantle and is divided into consecutive treating zones by means of a partition wall or walls. In connection with the partition wall there is provided a lifting structure which has an adjustable lifting capacity for transporting the material to be treated to the next treating zone through an opening in the partition wall.
    Type: Grant
    Filed: January 25, 1984
    Date of Patent: May 21, 1985
    Assignee: A. Ahlstrom Osakeyhtio
    Inventor: Seppo Virea