초록 ▼

The reinforcement for the bead of e.g. a pneumatic type, a rolling lobe diaphragm or an air spring is constructed by winding onto a mandrel or former superimposed layers alternately of unsheathed wire and flat, uncured rubber strip. Rubber is wound on before wire winding commences and continues afte

The reinforcement for the bead of e.g. a pneumatic type, a rolling lobe diaphragm or an air spring is constructed by winding onto a mandrel or former superimposed layers alternately of unsheathed wire and flat, uncured rubber strip. Rubber is wound on before wire winding commences and continues after wire winding stops, so that the assembly exposes no cut wire end. After the winding operation the assembly is subjected to heat and pressure with all the wire embedded in and surrounded by an integrated, vulcanized rubber body. The rubber layers may be parallel with and on opposite sides of the layers of spaced wire windings or a given rubber winding may have wire windings on its radially opposite sides. The windings, both of rubber and wire, may be discrete loops or may be made by helically winding a single rubber strip or wire. The shape of the assembly as well as the volume of rubber at any position therein may be controlled by varying the tension under which the rubber strip and/or the wire is wound.

대표청구항 ▼

A method of constructing a bead reinforcement comprising wrapping around a mandrel or former consecutively in superimposed relation layers respectively comprising a flat strip of uncured polymeric material and axially spaced apart windings of an inextensible material, the inextensible material being

A method of constructing a bead reinforcement comprising wrapping around a mandrel or former consecutively in superimposed relation layers respectively comprising a flat strip of uncured polymeric material and axially spaced apart windings of an inextensible material, the inextensible material being wound under a tension such that the polymeric material enters said axial spaces between the windings of said layer of windings, and continuing the wrapping until an annular assembly of the required diametral thickness and cross-sectional shape has been built up in which the polymeric material fills the spaces between the axially separated windings of said layer of windings and the axially separated windings of said layer of windings are surrounded by and embedded in the polymeric material.