Method for stacking billets and thermoforming

Details Method for stacking billets and thermoforming Method for stacking billets and thermoforming

1986-05-16

1988-12-13

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Cutting and uniting cut parts

264153, 264160, 2642974, 2642975, 264DIG57, B29C 5114, B29C 6502

Patent

active

047909722

ABSTRACT:
This invention encompasses a process for making containers from multiple stacked billets which comprises the steps of preparing thermoplastic sheet, cutting or punching billets from the sheet, stacking two or more of the billets together, heating the stacked billets or the mating surfaces of the billets to or above the fusion temperature of the mating surfaces, where the billets adhere to each other, and thermoforming the stacked billets into containers.

REFERENCES:
patent: 700656 (1902-05-01), Kempshall
patent: 1590347 (1926-06-01), Cooke
patent: 1912931 (1933-06-01), Clay
patent: 2268703 (1942-01-01), Dickey
patent: 2586446 (1952-02-01), Stockburger
patent: 2618311 (1952-11-01), Parker
patent: 2907612 (1959-10-01), White
patent: 3318748 (1967-05-01), Hurst
patent: 3962006 (1976-06-01), Saito et al.
patent: 4145240 (1979-03-01), Polzin
patent: 4374795 (1983-02-01), Keilp et al.
patent: 4471018 (1984-09-01), Kritchevsky et al.

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