Method of manufacturing separable slide fasteners

Abstract From the Canadian patent

Separable slide fasteners are manufactured from an elongate slide fastener chain composed of a pair of slide fastener stringers having rows of coupling elements alternating with element-free portions having substantially U-shaped recesses defined in inner edges thereof. The elongate slide fastener chain is fed under tension along a longitudinal path, and the slide fastener stringers are separated from each other. Then, an insertion pin is attached laterally to the inner edge of one of the element-free portions, and a box pin is attached laterally to the inner edge of another element-free portion confronting said one element-free portion. The insertion pin and the box pin which are laterally …