Patents Assigned to L. L. Brown, Inc.
  • Continuous thermoforming machine
    Patent number: 6851943
    Abstract: A pressure box for thermoforming a heated sleet of thermoforming material against a mold includes a top plate, side plates, a downstream and plate and an upstream end plate. Each end plate includes a pair of plate members that define a slot open to the bottom of the end plate. A sheet strip of elastomeric material is mechanically held in the slot and extends below the end wall to a seal surface. The seal surface is laser cut to closely conform with the three-dimensional shape of the mold.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: February 8, 2005
    Assignee: L. L. Brown, Inc.
    Inventor: William Brett Novosat