Patents by Inventor Oskar Kummer

Oskar Kummer 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 machine for fabricating building boards
    Patent number: 4464225
    Abstract: A method and machine for fabricating building boards or the like, especially asbestos cement plates, contains a turbulence device having at least one channel with a step-shaped widened portion. The channel either has the form of a slot extending over the entire width of the machine or there are provided a series of cylindrical bores forming essentially parallel channels. An intermediate chamber or compartment merges with the channel or channels. Leading from the intermediate chamber is an outlet gap to the upper surface of a felt band.
    Type: Grant
    Filed: May 7, 1982
    Date of Patent: August 7, 1984
    Assignee: Bell Maschinenfabrik AG
    Inventors: Alfred Bubik, Oskar Kummer, Burkard Rosenberg