Clamp mechanism for differential pressure thermoformer

Details Clamp mechanism for differential pressure thermoformer Clamp mechanism for differential pressure thermoformer

1983-04-14

1985-04-09

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Including shaping means comprising fluid pressure contacting...

425346, 4253871, 425398, 425416, 425DIG48, B29C 1700

Patent

active

045099090

ABSTRACT:
A mechanism for clamping a web of thermoplastic material against the face of a female mold prior to closure of the mold includes a clamping ring assembly mounted on the machine frame for movement relative to the frame independently of the molds. The clamping assembly is driven to and from its web clamping position by a cam mounted on the rock shaft which drives the molds between their open and closed positions and a constant radius section on the cam holds the clamp in its clamping position throughout a substantial portion of the operating cycle.

REFERENCES:
patent: Re27881 (1974-01-01), Brown et al.
patent: 3105270 (1963-10-01), Tibish
patent: 3172159 (1965-03-01), Edwards
patent: 3268952 (1966-08-01), Shelby
patent: 3341895 (1967-09-01), Shelby
patent: 3496257 (1970-02-01), Brown et al.
patent: 3507007 (1970-04-01), Martin
patent: 3600753 (1971-08-01), Otto
patent: 3650655 (1972-03-01), Santouris
patent: 4105386 (1978-08-01), Thiel et al.
patent: 4158539 (1979-06-01), Arends et al.
patent: 4255382 (1981-03-01), Arends et al.

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