Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including shaping means comprising fluid pressure contacting...
Patent
1977-10-14
1979-07-31
Spicer, Jr., Robert L.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Including shaping means comprising fluid pressure contacting...
425388, B29C 1704
Patent
active
041628837
ABSTRACT:
There is disclosed a thermoforming process and apparatus or machine including a male mold assembly and a pressure box or a female mold assembly disposed on support members or platens maintained in fixed relationship to each other whereby the pressure box assembly is first caused to pass through the plane of the heated plastic material whereafter the male mold then is caused to move into the pressure box together with the simultaneous introduction of controlled amounts of a pressurized fluid until complete interrelationship is attained with relative movement of the male mold to the pressure box being continued to a point proximate the plane of heated thermoplastic material as more clearly hereinafter discussed.
REFERENCES:
patent: 3027596 (1962-04-01), Knowles
patent: 3105270 (1963-10-01), Fibish
patent: 3178771 (1965-04-01), Fischer
patent: 3341895 (1967-09-01), Shelby
patent: 3346923 (1967-10-01), Brown et al.
patent: 3376607 (1968-04-01), Brown
patent: 3507007 (1970-04-01), Martin
patent: 3801244 (1974-04-01), Eisenberg
National Can Corporation
Spicer, Jr. Robert L.
Stenzel Robert A.
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