Patent ID: 6153135
Filing Date: 2000-11-28
Classification: B29C,B32B,C03B,C04B,E04B,Y02A,Y02B

Abstract:
A method for preparing an article of manufacture said article comprising at least one chamber enclosed by a solid, air-tight, encapsulating material, (A) the pressure inside the at least one chamber having a vacuum characteristic of being less than atmospheric pressure and (B) the encapsulating material of sufficient strength to maintain the integrity and the vacuum characteristic of the at least one chamber the method comprising:(1) contacting, in an environment of less than atmospheric pressure, (a) the surface of a preformed article that is porous to gases with (b) an encapsulation of a liquid material that solidifies into an air-tight, encapsulating material and(2) in the same environment of less than atmospheric pressure as in step (1), solidifying the liquid material to form thereby an air-tight, encapsulated article.