Patents Assigned to Maschinenfabrik Rissen G.m.b.H.
  • Device for the manufacture of deep-drawn objects using synthetic, thermoplastic foils
    Patent number: 3954374
    Abstract: A process and apparatus for forming objects of thermoplastic material by deep-drawing in which portions of a foil are cut to a size appropriate for each object, and are then freely supported while heating to the desired temperature. After heating the cut-out portions are tensioned about the edges thereof for the deep-drawing step. Modifications include multiple stations for heating and deep-drawing and means may be provided for deep-drawing the foil into a permeable container so as to line it with the deep-drawn thermoplastic material.
    Type: Grant
    Filed: July 17, 1974
    Date of Patent: May 4, 1976
    Assignee: Maschinenfabrik Rissen G.m.b.H.
    Inventors: Fritz Wommelsdorf, Werner Schmidt