| 摘要 |
831,166. Glazing. LJUNGDAHL, E. S. July 31, 1957 [July 31, 1956], No. 24348/57. Class 20(3) [Also in Group XXXVI] Two objects of glass or other vitreous material are spaced apart by a corrugated metal foil, the opposite edges of the foil being in contact with the objects, to which they are then sealed by first applying general heating to the assembly and then locally heating the portions to be fused. A double-glazed window unit comprises two glass panes 2 joined by a corrugated copper foil 3 formed into a closed rectangular ring the perimeter of which is slightly less than that of the glass panes between which the ring of foil is located, the assembly being heated in a funnel oven to 500‹C., and local heating then being applied to soften the glass in the region of the joint 1, preferably by passing an electric current through the foil, or inducing a current in it, or by dielectric heating of the glass. To improvethe bond the foil edges 1 may be provided with an oxide layer, or coated with a layer of powdered glass or borax. The foil may be corrugated both longitudinally and transversely and a third pane of glass may be introduced between the outer panes. A small vent hole is left in the foil and is filled in by soldering after cooling the assembly slowly. |
