Patents Assigned to Askco Engineering Corporation
  • Patent number: 4012477
    Abstract: Method of extruding a plastic film using a single roll which is rotatably and horizontally mounted between spaced-apart supporting members, each having curved recesses partially accommodating and encompassing opposite portions of the circumference of the roller. Molten plastic is distributed along the length of the roller, and the roller is preferably revolved to carry the molten plastic through the first recess to the second recess, whereby a substantially equal accumulation of plastic is collected in each recess and at opposite locations on the surface of the roller. The second accumulation of plastic is further located at a die aperture in the adjacent one of the two supporting members, whereby plastic from the second accumulation is extruded through the die aperture to form the sheet stock sought to be produced.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: March 15, 1977
    Assignee: Askco Engineering Corporation
    Inventors: Erich Beck, Albert C. Robbins, John C. Birdsall