Patents Assigned to Indalex Limited
  • Method of extrusion, and extrusion press
    Patent number: 5054303
    Abstract: In an extrusion press the void space between a pressure pad (4), a billet container (5), an extrusion die (6) and the billet (12) to be extruded is evacuated by suction through the pressure pad (4) and a hollow extrusion stem (3) before the commencement of extrusion. The extrusion ram (2) is hollow and contains a vacuum reservoir (7) connected to the hollow stem by a vacuum line (8) and valve (9). The vacuum line may have a compressed air line (10) and valve (11) connected to it.
    Type: Grant
    Filed: May 8, 1990
    Date of Patent: October 8, 1991
    Assignee: Indalex Limited
    Inventor: Michael J. Newman