Iti Scotland Limited

John Peter Booth

Gordon David Lovis

An apparatus () for and method of manufacturing helically wound tubular structures () includes a rotating faceplate () upon which are mounted a plurality of diameter defining rollers () which, in operation, cause a strip material () to be plastically deformed into a helical winding which may be lain down in abutting or self-overlapping relationship to form said tubular structure ().

Apparatus for and method of manufacturing helically wound structures

A tubular body comprises an inner hollow core and an outer casing of one or more strips of self mechanically inter-engaging helically wound material having a higher yield strength than that of the core material. Also provided is a method of forming the tubular body comprising the steps of winding the outer core onto the inner core and an end connector for use with said tubular body when said body is provided with helically extending detents on an outer surface thereof.

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Yorkshire, United Kingdom

John Peter Booth