VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG EINES SCHLAUCHES

摘要

A laminate of non-ferrous metal foil and heat softenable material is folded to tubular form to juxtapose the margins and the margins are heat sealed by passing the tube through an inductance coil; the inductance field may be intensified by a ferrite bar located in a mandrel over which the tube is fed.