Patents Assigned to Permacoat Limited
  • Method and apparatus for thermoforming of plastic sheets
    Patent number: 6942751
    Abstract: A method of forming plastics sheets, comprises the steps of supporting a die (or substrate 12) between plastics sheets 36 in an enclosure, heating the plastics sheets 36 by infra-red heating element 28, evacuating air from the enclosure, and urging the plastics sheets 36 into contact with opposite faces of the die (or substrate 12) while maintaining a vacuum or a substantial vacuum between the plastics sheets 36. Apparatus for performing this method is also disclosed.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: September 13, 2005
    Assignee: Permacoat Limited
    Inventor: Richard Warrington George