Stock material or miscellaneous articles – Sheet including cover or casing – Filled with gas other than air; or under vacuum
Patent
1986-08-19
1989-02-28
Epstein, Henry F.
Stock material or miscellaneous articles
Sheet including cover or casing
Filled with gas other than air; or under vacuum
52406, 62DIG13, 428 71, 428178, E04B 176
Patent
active
048084573
ABSTRACT:
A self-contained thermal insulation panel, of generally flat rectangular form suitable for placement within the walls or doors or a refrigeration cabinet, consists of a hermetically sealed envelope surrounding an assembled framework defining a plurality of thin parallel internal cavities. The cavities are formed by a plurality of thin stretched-out sheets, each preferably with at least one reflective face, spaced-apart by thin interlocking peripheral gaskets between a top and a bottom frame member. A method of manufacturing an insulation panel according to this invention requires the initial assembly, on a first frame member, of an alternating array of thin sheets and gaskets, then a final sheet and a second frame member all brought firmly together and permanently affixed as a unified assembly. The assembled structure is then evacuated and refilled with a heavier-than-air gas or low thermal conductivity, e.g., a halogenated methane or ethane, and sealed into an outer envelope closely surrounding the frame structure which thereby defines the panel shape. In yet another embodiment, gas-filled bubbles formed on one side of each sheet space it from the adjacent sheet, without a framework or foam, to generate the cavities.
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Cur Omer N.
Kruck Richard W.
Epstein Henry F.
Whirlpool Corporation
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