Rotary thread cutter for a sewing machine

摘要

A thread cutter for a sewing machine uses a circular rotary cutter mounted to the sewing machine. The thread cutter includes a body having an air motor disposed therein. A circular blade is supported on a shaft extending from the air motor. The cutter body is reciprocally supported on a rod fixed at one end to a mounting plate. The rod is disposed in a cylinder within the body and has a piston end, air supplied to one side or the other of the piston driving the cutter body reciprocally into and out of engagement with any threads trailing from a sewn article.