Inflatable core for use in forming a thermal break in a metal fr

Details Inflatable core for use in forming a thermal break in a metal fr Inflatable core for use in forming a thermal break in a metal fr

1980-08-22

1982-04-06

Hoag, Willard E.

Static molds

Having inflatable element

49DIG1, 52403, 249122, 249127, 264261, 264314, 425417, B29C 112, B29C 2700

Patent

active

043232183

ABSTRACT:
An inflatable core for use in forming a thermal break in a metal frame for a door and/or window by moulding and curing thermal barrier material, such as resin, in two parallel, laterally spaced, elongate gaps defined between respective pairs of confronting elongate surfaces of the inner and outer frame elements which when assembled form a box-section member. The gaps are converted into respective mould cavities for the resin by the pressure of shoes against the elements adjacent the respective gaps to close one side thereof, the shoes being removed only after the resin has cured to leave the finished thermal break. The shoes are carried on opposite walls of a laterally expansible tube which is inserted into the box-section and is expanded to press "non-stick" surfaces of the shoes against the respective gaps ready for the moulding and curing of resin therein, while maintaining the gap dimensions. After curing of the resin, the tube is contracted laterally to disengage the shoes and is then withdrawn to leave the finished thermal break.

REFERENCES:
patent: 2239989 (1941-04-01), Britton
patent: 2652168 (1953-09-01), Nelson et al.
patent: 3116521 (1964-01-01), Taccone
patent: 3204324 (1965-09-01), Nilsen
patent: 4096678 (1978-06-01), Diels et al.
patent: 4150713 (1979-04-01), Mio

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