Patents Assigned to Firma Elastogran Maschinenbau GmbH & Co.
  • Mold for plastics, particularly multi-component plastics injection mold having blind channel
    Patent number: 4012025
    Abstract: A mold including a blind channel connected to the sprue runner so that the first material entering the mold will be trapped in the blind channel.
    Type: Grant
    Filed: April 10, 1975
    Date of Patent: March 15, 1977
    Assignee: Firma Elastogran Maschinenbau GmbH & Co.
    Inventors: Rudolf Ernst, Fritz W. Schneider, Helmut Clausen
  • Mixing apparatus for multi-component plastics, particularly polyurethane
    Patent number: 3964731
    Abstract: A mixing apparatus including a mixing chamber with a reciprocating valve piston and a separate "recycle" chamber with a reciprocating grooved plunger. Piston and plunger are controlled in unison by a piston and cylinder assembly. In the "open" position of the valve piston pressurized components supplied through inlet conduits may enter the mixing chamber. In the "closing" position of the valve piston, the components supplied are by-passed across the grooved plunger back to their respective reservoirs.
    Type: Grant
    Filed: April 9, 1975
    Date of Patent: June 22, 1976
    Assignee: Firma Elastogran Maschinenbau GmbH & Co.
    Inventor: Rudolf Ernst