Method for sewing trouser-fly units and the like

摘要

Trouser-fly pieces are sewn to a continuous slide fastener chain and at the same time are surged along a curved edge. Variable spacing between the surged curved edge and the line or lines of stitches sewing the fly pieces to the fastener chain is made by selective puckering of each fly piece between two sewing mechanisms. The trailing end of each fly piece is lifted during the sewing to permit the positioning of the next fly piece against a stop.