Foil-enveloped evacuated thermal insulation elements

Details Foil-enveloped evacuated thermal insulation elements Foil-enveloped evacuated thermal insulation elements

2005-03-08

2005-03-08

Ahmad, Nasser (Department: 1772)

Stock material or miscellaneous articles

Sheet including cover or casing

Filled with gas other than air; or under vacuum

C428S071000, C428S075000, C428S076000, C428S068000, C428S069000, C428S057000, C428S121000, C428S126000, C428S129000, C428S130000, C428S192000, C493S101000, C493S903000, C493S907000, C493S908000, C053S403000, C053S405000, C053S432000, C052S309900, C052S404100, C052S406100, C052S406200

Reexamination Certificate

active

06863949

ABSTRACT:
The invention relates, on the one hand, to a prismatic, especially panel-formed thermal insulation element which is enveloped in a gas-tight foil and evacuated, whereby a stable core pre-formed from a porous material is completely enveloped in a single cut sheet of the gas-tight foil; as well as a manufacturing process for same comprising the following steps:a) Manufacture of a prismatic core corresponding to the desired form of the thermal insulation element from a porous material;b) Enveloping of the principal faces of this core with a single sheet of the gas-tight foil;c) At least partial welding together of the foil which is drawn tight around the core along the face of the core;d) Folding-in of the welded seam area of the foil against the face of the core;e) Stress-free folding-together of the areas of the cut sheet of gas-tight foil projecting beyond the core, covering and in flat contact with the end surface(s) of the core;f) Welding together of the folded-together areas of foil on at least one end face of the core;g) Evacuation of the enveloped core;h) Complete welding closed of all remaining openings in the foil under vacuum.

REFERENCES:
patent: 4749600 (1988-06-01), Cullen et al.
patent: 5900299 (1999-05-01), Wynne

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