APPARATUS FOR TAPERING FLEXIBLE METAL TUBES

摘要

Apparatus for converting flexible metal cylindrical tubes into nestable tapered tubes including a mandrel having a cylindrical portion shorter than the tube and a frustoconical portion whose largest diameter is equal to or greater than the filling opening of the tube and in which air is blown through ducts in the mandrel to force the tube against the inner surface of a matrix while the mandrel advances and the frusto-conical portion compensates for the widening of the bottom opening and the shortening of the length of the tube.