Apparatus for making a vacuum insulated container

Glass manufacturing – Fusion bonding means – Concentric body making

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Details

65270, 228 19, C03B 2316, C03B 2320

Patent

active

042204623

ABSTRACT:
A vacuum insulated container is constituted by a double-walled receptacle wherein the space between the walls is substantially evacuated to provide vacuum insulation. The outer wall is provided with an opening therein which is used during manufacture to provide access to the space between the walls so that the space may be evacuated. A stopper- or plug-like portion fills the opening after the container has been evacuated and is permanently joined or bonded to the surfaces of the opening thereby providing a sealing to maintain the vacuum in the space between the walls. The apparatus and method of manufacturing such a container include means for and the steps of: forming the opening by piercing the outer wall; providing a sealed chamber in which the container may be placed on a movable support after a sealing element is placed on the opening; evacuating the chamber; heating the container in the vicinity of the opening with the sealing element resting therein; and deforming the sealing element to cause it to completely seal the opening and bond to the container wall after it has been heated to a temperature permitting the material to flow.

REFERENCES:
patent: 1056971 (1913-03-01), Coleman
patent: 1388126 (1921-08-01), Rohland
patent: 1436197 (1922-11-01), Rohland
patent: 2684777 (1954-07-01), Danzin et al.
patent: 3232732 (1966-02-01), Wax
patent: 3749562 (1973-07-01), Nicolas et al.

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