Double-walled insulating member

Abstract

The invention relates to an insulating member and a method of producing said member. Such an insulating member consists of two sheet metal walls 1, 2, a sealing profile 3 connecting the walls 1, 2 hermetically at the edge, and dimensionally stable sealing material 4, more particularly an open-pored cellular material, which is accommodated in the evacuated cavity formed by the walls 1, 2 and the sealing profile 3 hermetically connected thereto. The sealing material 4 is dimensionally stable and supports the walls 1, 2. To improve the insulating effect of the insulating member in the edge zone also, the hermetic connection of the sealing profile 3 to the walls 1, 2 takes the form of a heat sealing, and the sealing profile itself does not consist of sheet metal, but of a material having a lower thermal conductivity, low vapour permeability and satisfactory hot sealing properties. Such an insulating member is produced in a vacuum chamber with the cavity at first open and furnished with the insulating material 4, whereafter the cavity is closed and the edge zones are hot sealed in vacuo.

Dependencies are inferred from the claim text.