Tubular article and method of making the same
AssigneeSipler Plastics, Inc.
InventorJames D. Stroupe
Life of this patent
Estimating the term…
Abstract
Tubular articles and the like and methods of making the same are disclosed, the tubular article being of desired tortuous shape, strong and rigid, free from porosity, light in weight, resistant to high and low temperatures with outerskin layers to improve fluid conveying and storage characteristics for example an exterior metallic foil or mesh lamina or skin of heat reflective and dispersive qualities and suitable for electric resistance heating if desired. The article is formed in a mold with an inflatable mandrel which carries a surrounding knitted fabric resin carrying component and with an exterior lamina or skin which is applied in the mold for subsequent integration in the article by matrix curing.
Claims9
In a monolithic tubular article comprising
- a light weight non-metallic rigid tubular body having a varying cross section between its ends and a fixed tortuous non-planar longitudinal axis between its ends and a plurality of interior circumferentially expanded tubular continuous seamless knitted fabrics conforming to the shape of the surface of the body and surrounded by and impregnated with an integral rigid cured resin the improvement which comprises
- an outer lamina modifying the action of the exterior surface of the body consisting of a single layer held in secured relation to the body by the resin of the body and extending over a selected limited part of the exterior of the body.
Dependencies are inferred from the claim text.