Tubular fabric coated with plastics or synthetic rubbers
OwnerHelmut Neidhardtinventor
Life of this patent
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Abstract
The disclosure embraces an inflatable flat tubular fabric which is coated on its outside surfaces with synthetic rubber or plastic and is constructed by weaving the fabric in tubular form with basic threads having a given tensile strength with the two layers of the fabric being joined together by auxiliary threads which have a substantially lower tensile strength than the basic threads so that, when the fabric is inflated, the auxiliary threads will be broken to permit expansion of the fabric to its full volume capacity.
Claims8
In a flat, tubular fabric which is coated on both outside surfaces with a material that is substantially impervious to the passage of fluid therethrough, said flat fabric being woven in both the warp and weft directions with basic fibers to have two layers, said layers having, in the flat condition, side edges which are connected together so that said fabric is inflatable to include at least one hollow space, the improvement comprising said fabric including auxiliary threads, said auxiliary threads binding said two layers together in a close, tight woven formation extending over the total area of said fabric with the two layers fastened tightly and closely together to substantially temporarily prevent relative lateral movement between said two layers, said auxiliary threads having a tensile strength that is substantially lower than the tensile strength of said basic fibers so that, when said fabric is inflated to assume said tubular shape, said auxiliary threads will be broken.
Dependencies are inferred from the claim text.