Method for making double-walled insulating metal container

Details Method for making double-walled insulating metal container Method for making double-walled insulating metal container

1991-02-01

1992-10-13

Gorski, Joseph M.

Metal working

Method of mechanical manufacture

Assembling or joining

29422, 228176, B23P 1904

Patent

active

051539772

ABSTRACT:
This invention relates to a method of making a double-walled thermally insulating metal container comprising an inner casing and an outer casing having an evacuation opening. A quantity of joining material is placed near or on the evacuation opening so as to cover the opening partially or completely. The assembly is treated in a vacuum furnace to evacuate the insulating space, to melt the joining material and to solidify the joining material in situ to provide vacuum sealing without resorting to a conventional sealing plate.

REFERENCES:
patent: 4157779 (1979-06-01), Ishii et al.

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