Method and apparatus for thermoforming of plastic sheets

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

Reexamination Certificate

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C156S285000, C156S382000

Reexamination Certificate

active

06942751

ABSTRACT:
A method of forming plastics sheets, comprises the steps of supporting a die (or substrate12) between plastics sheets36in an enclosure, heating the plastics sheets36by infra-red heating element28, evacuating air from the enclosure, and urging the plastics sheets36into contact with opposite faces of the die (or substrate12) while maintaining a vacuum or a substantial vacuum between the plastics sheets36. Apparatus for performing this method is also disclosed.

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patent: WO 99/25515 (1999-05-01), None

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