Patents by Inventor Manfred Ehlers

Manfred Ehlers 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).

  • Patent number: 5292570
    Abstract: A semifinished product formed from fiber reinforced thermoplastic material, with the semifinished product including a solid covering of fibers and thermoplastic material, which resolidifies, after melting, and a felt or wadding-like core of a fiber-polymer mixture. The core may be formed from a compressed material and the semifinished product may have either a cylindrical or oval shape. The solid covering has a thickness of less than 20% of the radius of the semifinished product, with the thickness preferably being a maximum of 10 millimeters.
    Type: Grant
    Filed: February 21, 1990
    Date of Patent: March 8, 1994
    Assignee: Menzolit GmbH
    Inventors: Gerd Ehnert, Manfred Ehlers, Rolf von Paumgartten
  • Patent number: 5252054
    Abstract: An apparatus for providing batches of a mouldable, fibre-reinforced thermoplastic material matched to a moulding to be produced and accompanied by heating, wherein a free-flowing initial product of fibres and thermoplastic material-containing binders are heated as a strand and a matched batch is separated from the strand and supplied to batch further processing. The apparatus includes a melting device with a melting channel, through which the material to be processed is pressed as a continuous strand, as well as a cooling station.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: October 12, 1993
    Assignee: Menzolit GmbH
    Inventors: Gerd Ehnert, Manfred Ehlers, Rolf von Paumgartten
  • Patent number: 4935182
    Abstract: A process for providing batches of a mouldable, fibre-reinforced thermoplastic material matched to a moulding to be produced and accompanied by heating, whereby a free-flowing initial product of fibers and thermoplastic material-containing binders is heated as a strand and a matched batch is separated from the strand and supplied to batch further processing.
    Type: Grant
    Filed: February 10, 1988
    Date of Patent: June 19, 1990
    Assignee: Menzolit GmbH
    Inventors: Gerd Ehner, Manfred Ehlers, Rolf von Paumgartten
  • Patent number: 4886701
    Abstract: A tangled fibrous material from cut glass fibre bundles, with the cut glass fiber bundler being fed into a compressed air flow and a glass fibre-laden air being deflected into a turbulent eddy flow of varying direction, so that a tangled fibrous material of wadding-like consistency is formed. Through the simultaneous addition of dry polymer-based binder powder, it is possible to obtain a tangled fibrous material as a starting product for a production of glass fibre-reinforced plastic moundings, which can be compressed to a felt. This can be packed as an intermediate or further processed in a heated belt press to glass fibre-reinforced plastic plates.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: December 12, 1989
    Assignee: Menzolit GmbH
    Inventors: Gerd Ehnert, Manfred Ehlers, Gerhard Sauer, Klaus Vogel