Patents Assigned to Corma
  • Process of and apparatus for making plastic tubing
    Patent number: 5372774
    Abstract: The invention concerns apparatus for molding tube (20) utilizing a travelling mold tunnel. The tunnel is made up of mold blocks (16) each comprising parts (13, 15) which are hinged together to be closeable to form the tunnel and openable to release tube from the tunnel. The opened mold blocks (16) from the downstream end of the tunnel are opened and returned to the upstream end without change in their orientation to reform the tunnel about an extrusion nozzle (18) for thermoplastic extrudate.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: December 13, 1994
    Assignee: Corma
    Inventor: Manfred A. A. Lupke