Patents by Inventor Robertus H. Evers

Robertus H. Evers 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).

  • Device for the continuous manufacture of slabstock polyurethane foam
    Patent number: 5582840
    Abstract: The present invention relates to a device for the continuous manufacture of slabstock polyurethane foam including a conveyor means (1), a mixing head (51) and means (6) for discharging the reaction mixture from the mixing head (51) onto the conveyor means (1). The device further includes a start board (7), a stop board, means for moving the start board (7) along the conveyor means at the beginning of a production run in such a manner that it obstructs the moving reaction mixture to thereby increase the height of the first portion of the produced foam, and means for moving the stop board at the end of a production run in such a manner that it pushes the foaming reaction mixture ahead to thereby increase the height of the end portion. In this way, no operator has to enter the foaming machine and the start and end profiles of the foam blocks are optimised.
    Type: Grant
    Filed: February 2, 1995
    Date of Patent: December 10, 1996
    Assignee: Prefoam AG
    Inventors: Hendrik Pauw, Brian J. Blackwell, Robertus H. Evers, Rudi Mortelmans