Patent ID: 6637357
Filing Date: 2003-10-28
Classification: D05B

Abstract:
A two-needle overlock sewing machine comprising a throat plate including an opening needle hole, and an outer tongue projecting in the cloth feed direction to form one side of the needle hole, a thread chain holder for cutting off and holding a thread chain, said thread chain holder being disposed before the throat plate, a presser foot disposed above the throat plate, spring means for pressing the presser foot to the throat plate, a push-up lever for lifting up the presser foot from the throat plate against the action of the spring means, and a middle tongue disposed in the throat plate so as to be movable back and forth in the cloth feed direction, said middle tongue being projected into the needle hole in forward motion, and being retreated from the needle hole in backward motion, wherein: the middle tongue is coupled with the push-up lever through a transmission mechanism, and when the presser foot is raised by manipulating the push-up lever, the middle tongue is drawn back to retreat from the needle hole.