Patents Assigned to Maplan Maschinen- und Technische Anlagen Planungs- und Fertigungs-Gesells chaft m.b.H
  • Screw extruder for the processing of thermoplastic resins and similar materials
    Patent number: 4247206
    Abstract: A screw extruder of the type in which a pair of counter-rotating screws of progressively increasing diameter plasticize and extrude thermoplastic resins and in which an equal ratio of power conversion in shear and convective heating to throuput of material is obtained over the length of the screws.
    Type: Grant
    Filed: March 6, 1979
    Date of Patent: January 27, 1981
    Assignee: Maplan Maschinen- und Technische Anlagen Planungs- und Fertigungs-Gesells chaft m.b.H
    Inventor: Rudolf Zahradnik