Pipes and tubular conduits – Flexible – Braided – interlaced – knitted or woven
Patent
1995-12-11
1998-07-28
Gerrity, Stephen F.
Pipes and tubular conduits
Flexible
Braided, interlaced, knitted or woven
138133, 138149, F16L 1102
Patent
active
057850917
ABSTRACT:
A flexible insulated air duct is provided with a core of a helical wire encapsulated in a tape, an insulation blanket wrapped around the core, and a jacket with a diamond interlock scrim on the outside of the insulation blanket. The jacket is comprised of an inside layer, a diamond-interlock scrim, a parallel scrim, and an outer coat layer. The diamond-shaped scrim has yarns arranged in a criss-crossed pattern, while the parallel scrim has yarns arranged in parallel. The criss-crossed yarns are made from a heavier gauge material with better tensile strength than that of the parallel yarns. The inside layer, the parallel and criss-crossed yarns, and the outer layer are laminated together using an adhesive. The completed jacket is pulled over the insulation blanket and the inner core to form a flexible air duct having a jacket with a diamond interlock scrim.
REFERENCES:
patent: 746319 (1903-12-01), Frees
patent: 1230867 (1917-06-01), Cobb
patent: 3885593 (1975-05-01), Koerber et al.
patent: 4410014 (1983-10-01), Smith
patent: 5526849 (1996-06-01), Gray
patent: 5607529 (1997-03-01), Adamczyk et al.
Attached Exhibit 1 provides a sample of a prior art vapor barrier jacket containing scrim, which was manufactured by Goodman Manufacturing of Houston, Texas. The prior art scrim of Exhibit 1 has a rectangular reinforcement pattern where scrim yarns intersect at a 90 degree angle, no date.
Gerrity Stephen F.
Tele-Flow, Inc.
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