Apparatus for setting a workpiece on a zipper sewing machine

摘要

An alignment apparatus for setting a workpiece on a zipper sewing machine including a workpiece presser arm having surface projections which contact with internal micro-switches of a ring-like side plate which receives and faces the workpiece presser unit. The presence or absence of the surface projections in relation to the micro-switches creates variations in signals which are effective to select the required sewing pattern.