Inner inflatable and collapsible mold

Details Inner inflatable and collapsible mold Inner inflatable and collapsible mold

1984-08-20

1986-02-04

Hoag, Willard E.

Static molds

Having inflatable element

249122, 249127, 425417, B29C 3300, B29C 3348, B29C 4138

Patent

active

045680574

ABSTRACT:
Methods and apparatus for producing an integral housing includes an inner and outer mold. A plurality of frames having plastic sheets are joined together to form the inner mold when pressurized inside of a rigid outer mold. The edges of the plastic sheets are sealed to prevent leakage of pressure.

REFERENCES:
patent: 1381179 (1921-06-01), Gerson
patent: 1777435 (1930-10-01), Hogelund
patent: 2644198 (1953-07-01), Crawford
patent: 2897668 (1959-08-01), Graham
patent: 3228736 (1966-01-01), Beckerman
patent: 3334175 (1967-08-01), Vincent
patent: 3561633 (1971-02-01), Morrison
patent: 3619432 (1971-11-01), Harrington
patent: 3854620 (1974-12-01), Saidla
patent: 3937781 (1976-02-01), Allen
patent: 4118451 (1978-10-01), Schaus
patent: 4183778 (1980-01-01), Mesnel
patent: 4212406 (1980-07-01), Mittelmann

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