Heat-insulated structural section assembly

DETAILED DESCRIPTION In accordance with the invention, this object is achieved by the fact that the flanges for clamping one heat-insulating bar which are adjacent to the enclosed air space are made longer than the flanges for clamping the other heat-insulating bar.
The longer flanges are produced quite simply by slightly modifying the conventional extrusion die used to manufacture the metal structural section so as to be integrally formed therewith.
In a preferred embodiment of the invention, the longer flange of each metal structural section extends toward the opposite flange of the other metal structural section.
In a further embodiment of the invention, the longer flanges are extended outwardly over the respective contact surfaces resulting from the bending of said opposite longer flanges against said one heat-insulating bar.
The metal structural sections are made of any lightweight metal or alloy suitable for window or door frames, preferably aluminum or aluminum alloy.
The heat-insulating bars are made of any plastic material having good heat-insulating characteristics e.
g.
polyamides.
Such plastic materials are well known to those skilled in the art.
A preferred embodiment of the invention will now be further described with reference to the accompanying drawings: