Patents by Inventor Gerd Reffelmann

Gerd Reffelmann 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 apparatus for the discontinuous production of a foamed block
    Patent number: 4271108
    Abstract: The invention is directed to a method and device for the discontinuous production of block foam. The device has a mixing unit provided with component feed lines and a stirrer. The device is vertically movable on a bridgelike framework. The mixing unit has a bottomless cylindrical shell which serves as a mixing container. The bottomless cylindrical shell can be arranged on a head plate and can be placed on the bottom of a mold placed beneath it. On the bottom of the mold is a flexible elastic layer on top of which is arranged a plastic film.
    Type: Grant
    Filed: January 2, 1980
    Date of Patent: June 2, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventor: Gerd Reffelmann
  • Process and equipment for the continuous production of block-shaped foam
    Patent number: 4200603
    Abstract: The instant invention is directed to a process for the continuous production of block-shaped foam and to the equipment used therefore. The process of the invention broadly involves the heating of the bottom film prior to application of the foamable mixture. In this way, the undesirable crust generally formed on the bottom of the foam blocks is substantially reduced and/or eliminated.
    Type: Grant
    Filed: October 23, 1978
    Date of Patent: April 29, 1980
    Assignee: Maschinenfabrik Hennecke GmbH
    Inventors: Reiner Raffel, Gunter Hauptmann, Gerd Reffelmann, Wilfried Ebeling