Continuous mold thermo forming

Details Continuous mold thermo forming Continuous mold thermo forming

1975-10-14

1976-09-28

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Endless casting surface and cooperating harvesting means

425326R, 425370, 425373, 425388, 425DIG201, 425307, B29C 1300, B29C 1500

Patent

active

039828689

ABSTRACT:
An apparatus for the continuous forming of molded plastic sheet from granular thermoplastic materials directly from granular thermoplastic material by plasticizing the granular material through a blender and an extruder, thence passing such material through a pair of roller dies to form a sheet of material that is fed directly to a continuously moving conveyor belt where the sheet is vacuum formed, thence trimmed and cut to size.

REFERENCES:
patent: 2446782 (1948-08-01), Otis et al.
patent: 2803577 (1957-08-01), Colt et al.
patent: 3144376 (1964-08-01), Plumberg et al.
patent: 3170499 (1965-02-01), Deist
patent: 3546846 (1970-12-01), Sens
patent: 3586591 (1971-06-01), Munters et al.
patent: 3635631 (1972-01-01), Fields

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