Coextrusion apparatus, method and article

Abstract From the Canadian patent

A coextrusion head for producing a generally tubular elastomeric ply made up of first and second concentric-tubular streams of elastomeric material having interposed adjacent to, their interface, a closely spaced array of parallel reinforcing elements wherein the coextrusion head includes a reinforcing element guide subassembly including a generally annular guide element as well as a mechanism for individually and independently directing and accurately positioning a circular array of uniformly spaced individual reinforcing elements. A generally annular inner die assembly cooperates with the annular guide element to form a first distribution channel and a generally annular outer die assembly …