Patents Assigned to Air Liquide American, L.P.
  • Patent number: 6898954
    Abstract: An improved apparatus and method for metal extrusion applications and presses wherein high purity inert and/or partially inert gases are introduced at or near the die exit. The environment at or near the exit is also preferably analyzed and/or monitored on a continual or nearly continual basis. The environment is also preferably controlled to which minimize or eliminate oxidation of metals and other extruded materials. The apparatus and method allow faster extrusion rates, improved surface quality of the extruded materials, and increased die life. In an embodiment, bi-phasic inerting media may also be used.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: May 31, 2005
    Assignee: Air Liquide American, L.P.
    Inventors: Richard Twigg, Robert Oesterreich