Patents by Inventor Sven I. Bergstrom

Sven I. Bergstrom 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 shredding and dry-defibrating compressed cellulose pulp and forming a batt of the resulting cellulosic fibrous material
    Patent number: 4167378
    Abstract: A method and apparatus are provided for shredding and dry-defibrating compressed cellulose pulp, and depositing the resulting fibrous material on a foraminous support to form a batt of relatively uniform density while controlling the feed of cellulose pulp material through the shredding and dry-defibrating operations to the foraminous support according to the output rate of the batt-forming operation, to ensure a relatively uniform density in the batt withdrawn from the foraminous support.
    Type: Grant
    Filed: February 4, 1977
    Date of Patent: September 11, 1979
    Assignee: Mo och Domsjo AB
    Inventors: Per B. Hagg, Sven I. Bergstrom, Lars E. Lundmark, Carl-Erik L. Hedberg