Patents by Inventor Jurgen Hasberg

Jurgen Hasberg 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).

  • Process for the production of sheets of foamed thermoplastics synthetic resins
    Patent number: 3937777
    Abstract: A process and apparatus for continuous production of molded sheets of a foamed thermoplastic synthetic resin, wherein a synthetic resin is fed into a screw extruder and a low boiling point liquid expanding agent is introduced under high pressure into the extruder and admixed with the resin in the extruder and thereafter the resulting admixture is extruded in the form of a plurality of foam filaments to insure proper distribution of the admixture to the nozzles of the extruder. A gear pump is provided for each nozzle. Also, to avoid collapsing of the foam means are provided for tempering the foam filaments by the application of heat.
    Type: Grant
    Filed: November 27, 1972
    Date of Patent: February 10, 1976
    Assignee: Dynamit Nobel AG
    Inventors: Michael Wienand, Jurgen Hasberg, Franz-Werner Alfter