End adapter for flexible corrugated tube

Abstract From the Canadian patent

A flexible corrugated tube containing an integral flared end adaptor is made by applying an uncured elastomer tube about a forming mandrel as well as a flared end mold. Corrugations having grooves and ribs generally exist along at least a portion of the forming mandrel usually in the form of a cured, corrugated elastomer sleeve. Optionally a, portion of the flared end mold also has corrugations thereon. A cord is wrapped about the uncured tube thereby pressing the cord into the grooves between the corrugated ribs. The elastomeric sleeve is then cured and the cord removed.