|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||29/4551 ; 29/422 ; 228/176|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 44 인용 특허 : 0|
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.
A method for making a thermally insulating metal container comprising the steps of: (a) preparing an inner casing having a mouth portion; (b) preparing an outer casing having a mouth portion, a bottom portion, and an evacuation opening of a given shape provided in the outer casing and having a length not exceeding a diameter at one end remote from the mouth portion of said outer casing; (c) joining the mouth portions of each casing to each other and fitting the bottom portion to the diameter of said one end of said outer casing thereby forming a containe...