Patent ID: 6516735
Filing Date: 2003-02-11
Classification: D05B

Abstract:
A thread cutter for a sewing machine with a rotating hook (12), wherein a surface cam (60) is provided which, together with a cam follower (58), controls the movement path of a pivotable thread catcher lever (26), which grasps the thread with a thread catcher (30, 36) and severs it with a cutter (82), characterized in that the surface cam (60) is connected in a torsion-proof manner with the hook (12), and that arresting means (38) are provided which, in their blocking position, maintain the cam follower (58), which is coupled with the thread catcher lever (26), radially outside the engagement range of the surface cam (60) and, with manual or program-controlled triggering, only release the cam follower (58) for contact with the surface cam (60) during one revolution of the hook, during which the needle is outside of the pivot range of the thread catcher (30).