Patent ID: 8377182

Claim:
A gas anti-diffusion assembly comprising a: (A) First polymeric film layer not permeable to gas, the film layer comprising first and second facial surfaces; (B) First adhesive layer comprising first and second facial surfaces, the second facial surface of the first polymeric film layer over and in contact with the first facial surface of the adhesive layer; (C) Second polymeric film layer not permeable to gas, the second polymeric film layer comprising first and second facial surfaces, the second facial surface of the first adhesive layer over and in contact with the first facial surface of the second polymeric film layer; (D) Second adhesive layer comprising first and second facial surfaces, the second facial surface of the second polymeric film layer over and in contact with the first facial surface of the second adhesive layer; (E) Mesh layer comprising first and second facial surfaces and positioned within the assembly such that at least one of the facial surfaces of the mesh layer is in contact with a facial surface of an adhesive layer; (F) First fluid opening that extends from and through the first polymeric film layer to and provides fluid communication with the mesh layer; and (G) Second fluid opening that extends from and through the second adhesive layer to and provides fluid communication with the mesh layer; With the provisos that(1) the first and second fluid openings are connected to the mesh in a manner such that a passageway is formed that allows a gas to pass through the gas anti-diffusion assembly by moving into and through the first fluid opening, into and through the mesh layer, and into and out from the second fluid opening, and (2) the mesh layer is configured as an elongated path with the first fluid opening terminating at or near one end of the mesh layer and the second fluid opening terminating at or near the opposite end of the mesh layer.