Patents Assigned to Harmon Thermal Europe (France)
  • Method and machine for welding thermoformed sheets of plastics material
    Patent number: 6217699
    Abstract: A method and apparatus for welding thermoformed sheets of plastic material having lands formed therein such that the lands are welded to one another utilizing tubes which are positioned to be in line with the lands in a stack of thermoformed sheets so as to direct hot and cold gas to the lands to complete the welding process. In some embodiments, a plurality of tubes are inserted from opposite sides of blocks of stacked thermoformed sheets such that the tubes enter cells defined between the sheets of the block.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: April 17, 2001
    Assignee: Harmon Thermal Europe (France)
    Inventor: Claude Martin