초록 ▼

Spiral bands having a plurality of convolutions of a high tensile strength composite material are formed by feeding a plurality of continuous high tensile strength fibers through an uncured resin to form a web, depositing the web on a release web having at least one substantially flat surface to for

Spiral bands having a plurality of convolutions of a high tensile strength composite material are formed by feeding a plurality of continuous high tensile strength fibers through an uncured resin to form a web, depositing the web on a release web having at least one substantially flat surface to form a laminate, winding the laminate around the mandrel to form a plurality of overlapping convolutions, curing the resin in the composite web to set the convolutions in a spiral configuration, and then removing the release web from the composite web. The convolutions of the spiral bands in accordance with this process have substantially flat surfaces and an elastic memory. These bands can be used to reinforce axially extending structures having internal forces directed radially outward therefrom by wrapping the band around the structure with a layer of adhesive applied to hold the convolutions in place.

대표청구항 ▼

A composite band for use in reinforcing an axially extending structure having a force directed radially outward therefrom, comprising a web of material wound in a coil terminating in an inner end and an outer end and having a plurality of elastic convolutions between said inner end and said outer en

A composite band for use in reinforcing an axially extending structure having a force directed radially outward therefrom, comprising a web of material wound in a coil terminating in an inner end and an outer end and having a plurality of elastic convolutions between said inner end and said outer end, said web having first and second sides, at least one of said first and second sides of said web having a surface that is substantially flat in transverse cross-section, said web including a plurality of continuous, high tensile strength fibers substantially completely encapsulated in a resin matrix and not interconnected by cross-threads, substantially all of said fibers extending codirectionally with one another through said resin matrix.