Patent ID: 9022078
Filing Date: 2015-05-05
Classification: B29C,F16L,F24F

Abstract:
1. An insulated flexible duct of generally three dimensions, formed helically and sequentially in one machining process comprising; A first substrate material provided with an adhesive means along a leading edge to attach a second substrate and a tail portion, said tail portion including a plurality of layers; A wire reinforcement member inserted between layers of the tail portion of the first substrate; A second substrate comprising a stable portion and a series of horizontal strip portions, wherein the stable portion is adhesively attached above the leading edge of the first substrate and the horizontal strip portions are shaped to an insulation compartment means to contain an insulation means; A series of gap portions imparted to separate the horizontal strip portions; An insulating means provided to occupy the insulation compartment means and; A third substrate material of two helix widths provided with an adhesive means to form an outer skin.