Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including shaping means comprising fluid pressure contacting...
Patent
1995-02-21
1996-10-08
Davis, Robert
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Including shaping means comprising fluid pressure contacting...
269119, 269121, 425DIG48, B29C 5126
Patent
active
055629334
ABSTRACT:
An adjustable clamping frame used in a vacuum forming machine comprising two longitudinal frame members disposed in spaced parallel relation to one another and two transverse frame members disposed in spaced parallel relation to one another. The two longitudinal frame members are perpendicular to the two transverse frame members. The longitudinal frame members have elongated slots for receiving the opposite ends of the two transverse frame members. The elongated slots permit selective sliding movement of the transverse frame members within the longitudinal frame members for varying the spacing between the transverse frame members in order to accommodate varying sizes of plastic sheets to be molded. The elongated slots also permit removal of each transverse frame member by rotation of each transverse frame member out of the elongated slots of the longitudinal frame members.
REFERENCES:
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patent: 3287765 (1966-11-01), Puente
patent: 3599959 (1971-08-01), Asenbauer
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patent: 3960471 (1976-06-01), Medendorp
patent: 4009981 (1977-03-01), Rosen
patent: 4018551 (1977-04-01), Shuman
patent: 4938678 (1990-07-01), Oulman
Photographs of prior art machine, Shuman Company, Charlotte, NC (No date).
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