Patents by Inventor Stefan M. Hartog

Stefan M. Hartog 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 producing layers of dry fibres on a forming surface
    Patent number: 4775307
    Abstract: The invention relates to an apparatus for producing layers of dry fibres and/or particles on a forming surface pervious to air. According to the invention, the material is distributed in air and passed to a forming unit where a turbulence with high intensity is effected in that air is injected through separate nozzles.
    Type: Grant
    Filed: August 5, 1986
    Date of Patent: October 4, 1988
    Assignee: Svenska Traforskningsinstitutet
    Inventors: Stefan M. Hartog, Bernt H. F. Hollmark
  • Method for producing layers of dry fibres on a forming surface
    Patent number: 4624819
    Abstract: The invention relates to a method and an apparatus for producing layers of dry fibres and/or particles on a forming surface pervious to air. According to the invention, the material is distributed in air and passed to a forming unit where a turbulence with high intensity is effected in that air is injected through separate nozzles.
    Type: Grant
    Filed: December 7, 1984
    Date of Patent: November 25, 1986
    Assignee: Svenska Traforskningsinstitutet
    Inventors: Stefan M. Hartog, Bernt H. F. Hollmark