Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1978-12-07
1981-01-20
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
29241, 292435, 29509, 49DIG1, 52403, B23P 1904
Patent
active
042453844
ABSTRACT:
This invention relates to methods and apparatus for making heat-insulated structural section assemblies for use in window and door frames, and the like. The structural section assemblies consist of two structural metal sections transversely connected to each other by a pair of parallel, heat insulating bars spaced from each other and having longitudinal ends of swallow-tail cross-sectional shape which are successively received between pairs of longitudinally extending opposite grooves each defined by upper and lower flanges of said structural sections, whereby said pair of heat-insulating bars define an enclosed space, these grooves loosely receiving first one of said heat-insulating bars being closed upon said first heat-insulating bar by continuously pressing said upper flanges against said heat-insulating bar.
REFERENCES:
patent: 3420026 (1969-01-01), Nolan
patent: 3579724 (1971-05-01), Toth
patent: 3992769 (1976-11-01), Jackson
patent: 3999354 (1976-12-01), Anter et al.
patent: 4079496 (1978-03-01), Schmidt
patent: 4096678 (1978-06-01), Diels et al.
patent: 4194284 (1980-03-01), Diels et al.
Moon Charlie T.
Wieland-Werke Aktiengesellschaft
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