METHOD AND APPARATUS FOR FORMING A HEAD ON A FASTENER AND A FASTENER FORMED THEREFROM

摘要

A method and apparatus for forming a head having a controlled predetermined shape on an end of an elongate member, such as a wire, which is formed into a fastener where an end portion of the wire is secured in a predetermined position and axially compressed to radially, outwardly expand a predetermined amount of wire material to form the head on the wire and where material flow is directed during axial compression to provide the controlled predetermined shape of the head.