Process for producing a thermally insulated flask

Details Process for producing a thermally insulated flask Process for producing a thermally insulated flask

1995-05-23

1997-06-03

Bryant, David P.

Metal working

Method of mechanical manufacture

Assembling or joining

220425, 215 121, B21D 3900

Patent

active

056342560

ABSTRACT:
A thermally insulating flask having two containers of flow-pressed aluminum, wherein an inner container is placed inside and at a distance from an outer container. The inner container forms a flask neck at the top of the inner container, which is connected in an air-tight manner with the outer container. Both containers are connected at the top by a material of low thermal conductivity, for example chrome-nickel steel, in an air-tight and rigid manner. The connecting piece can be constructed from a composite-plated chrome-nickel steel laminate, in which the aluminum layer has been removed by a lathe, leaving two collar rims, to allow welding to the aluminum containers, while the remaining chrome-nickel steel layer forms the mechanical connection which has low thermal conductivity.

REFERENCES:
patent: 2322488 (1943-06-01), Uecker
patent: 2695719 (1954-11-01), Faris
patent: 3347403 (1967-10-01), Lehman
patent: 3863794 (1975-02-01), Hata
patent: 4850496 (1989-07-01), Rudell et al.
patent: 4856174 (1989-08-01), Ishizaki et al.

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