REISSVERSCHLUSS SOWIE VERFAHREN UND VORRICHTUNG ZU SEINER HERSTELLUNG

摘要

A slide fastener and method and apparatus for making the same are disclosed wherein coils of filamentary material are secured to adjacent edges of a pair of carrier tapes. Each coil of filamentary material is formed from a filament having a specially shaped cross section which is arranged in a mirror image relationship with respect to its adjacent filamentary coil. During formation of the filamentary coils, they are simultaneously wound on a mandrel having differently shaped surfaces which aid in the final shaping of each coil.