Rotatable sheet support structure for a twin-sheet thermoformer

Details Rotatable sheet support structure for a twin-sheet thermoformer Rotatable sheet support structure for a twin-sheet thermoformer

1997-09-30

1999-11-02

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Preform assembly means and means for bonding of plural...

Reshaping means utilizing fluid pressure directly contacting...

2642975, 264545, 425388, 425397, 425508, B29C 5110, B29C 5122

Patent

active

059758791

ABSTRACT:
Multiple legs elevate a central ring bearing, to which a ring-shaped rotatable plastic sheet support carousel is mounted. The carousel is fitted with a ring gear which engages with a drive system to position the carousel and the thermoplastic sheets supported from it. A multi-post vertical press is positioned with two posts extending upwardly interior to the ring bearing, and two posts extending upwardly exterior to the ring bearing. The ring bearing thus extends through the press, allowing the carousel to supply and remove plastic sheets to and from the press. An upper platen and a lower platen are mounted for vertical displacement to the posts, thereby ensuring a high degree of parallelism between the molds mounted to the platens, and accurate twin-sheet thermoforming.

REFERENCES:
patent: 2932874 (1960-04-01), Ludwig et al.
patent: 3583036 (1971-06-01), Brown
patent: 3810731 (1974-05-01), Anderson
patent: 3868209 (1975-02-01), Howell
patent: 3925140 (1975-12-01), Brown
patent: 4244915 (1981-01-01), Boardman
patent: 4555377 (1985-11-01), Whiteside et al.
patent: 5167969 (1992-12-01), DeMaio, Jr. et al.
patent: 5800846 (1996-02-01), Hart

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