Vacuum channel method of laminating glass sheets
AssigneePPG Industries, Inc.
InventorsWilliam P. Cathers, John S. Ferretti
Life of this patent
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Abstract
This invention involves a method of using deairing rings comprising flexible channel members of a novel construction around the periphery of an assembly of glass and flexible plastic sheets during its lamination and the construction of said novel deairing rings. The deairing rings are readily applied to and removed from the assemblies to be laminated and are so constructed as to facilitate the lamination of large windows, particularly those having sharp corners.
Claims5
A method of laminating one or more glass sheets of substantially identical polygonal outline to a flexible plastic sheet of substantially similar polygonal outline to form a polygonal laminated assembly having straight sides and sharply bent corners comprising mounting said sheets in aligned relation to form an assembly of polygonal configuration, applying to each straight side of said assembly at least one straight, flexible, channel-shaped member having flexible lips extending from the base of said channel-shaped member and a length shorter than the corresponding straight side of said assembly in such a manner that said flexible lips engage the edge portions of the outer major surfaces of said assembly along a substantial portion of the lengths of said corresponding straight sides and said bases of said straight channel-shaped members are in spaced relation to said corresponding straight sides to form straight passages between said bases and said straight sides enclosed by said flexible lips, said passages terminating short of said sharply bent corners, applying a sharply angled channel-shaped member having flexible lips of different length than those of said straight, flexible, channel-shaped members and a base of different width than said bases of said straight, flexible channel-shaped members to each of said sharp corners in such a manner that said flexible lips of said sharply angled channel-shaped members engage the edge portions of the outer major surfaces of said assembly at each of said sharply bent corners and also extend from said sharply bent corners sufficient distance to be in overlapping relation with the flexible lips at the end portions of adjacent of said straight, flexible, channel-shaped members to cooperate with said straight, flexible, channel-shaped members to form a continuous chamber around said polygonal assembly, and connecting at least one of said channel-shaped members to a source of vacuum to remove entrapped fluid from any interfacial surface between said sheets through said continuous chamber.
Dependencies are inferred from the claim text.