Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Coacting shaping surfaces
Patent
1976-05-14
1978-07-18
Lazarus, Richard B.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Coacting shaping surfaces
425384, 425397, B29C 1700
Patent
active
041012526
ABSTRACT:
Sheet supporting apparatus for a continuous sheet, differential pressure thermoforming machine comprising laterally spaced apart sheet support members for supporting the lateral edges of a formable sheet and for moving the sheet in a forward path of travel. The apparatus includes an open top, air receiving, sheet support box disposed interjacent the laterally spaced sheet support members upstream of a differential pressure mold, and mechanism for introducing air under pressure to the inside of the box for supporting a midportion of the sheet of plastic.
REFERENCES:
patent: 3193599 (1965-07-01), Crilly
patent: 3216491 (1965-11-01), Brown
patent: 3583036 (1971-06-01), Brown
patent: 3664791 (1972-05-01), Brown
Lazarus Richard B.
Sweetheart Plastic, Inc.
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