VORRICHTUNG ZUM FORMEN UND ABZIEHEN EINER REISSVERSCHLUSSCHRAUBENWENDEL

摘要

A device for shaping and transporting coil fastener elements which comprises a rotatable screw and an oppositely disposed rotating means having an endlessly toothed periphery. A mandrel of a coiling unit is arranged between the rotating screw and the rotating means with its extension curved in conformity with the periphery of the rotating means. Convolutions formed successively around the mandrel are shaped and transported between screws and rotating means and, upon departure and disengagement from the screw, are continued to advance in driving engagement with the rotating means toward a die wheel whereby they are finally set with heat.