Patent ID: 7913634
Filing Date: 2011-03-29
Classification: D05B

Abstract:
1. A sewing machine comprising: a top covering shaft mechanism attached to a sewing machine body; a spreader mechanism detachably attached to the top covering shaft mechanism from below, wherein the spreader mechanism is operable to catch a covering thread and to interlace the covering thread with a thread inserted into a needle to form covering stitches; and an operating member comprising a hook portion and rotatably attached to either one of the top covering shaft mechanism and the spreader mechanism, wherein the other of the top covering shaft mechanism and the spreader mechanism comprises a protrusion with which the hook portion is engageable, and the operating member is rotatable between a position at which the hook portion engages with the protrusion to lock the spreader mechanism with respect to the top covering shaft mechanism and another position at which the spreader mechanism is detachable from the top covering shaft mechanism.