Metal window and/or door construction

Details Metal window and/or door construction Metal window and/or door construction

B - Operations, Transporting

29

C

26/184

B29C 1/12 (1980.01)

Patent

CA 1157247

ABSTRACT OF THE DISCLOSURE A thermal break in a metal frame for a door and/or window is provided 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, whilst 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 After curing of the resin, the tube is contracted laterally to disengage the shoes and is then withdrawn to leave the finished thermal break. GCB/SH/BA1808/FA

358689

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