FREELY REVOLVING LOOPER FOR DOUBLE LOCK STITCH SEWING MACHINES

摘要

The inner side wall (38) of a bobbin case holder (36) flows with the inner side wall (60) of a bobbin case (57). The rear section of the bobbin case holder is an eccentric truncated cone (50) in relation to a guide rib (40). A cone axis (51) and the axis (55) of a stud (54) run below and to the side of the axis (41) of the guide rib, at the side of the upwards moving section of the circular path of the looper point. The leading end face of the bobbin case is curved into mushroom shape, forming a cap (59) ranging radially ever the side wall (60). At least the start zone of the edge section (61) lies in the plane of the movement path of the leading end of the thread deflection shoulder of the looper body.