DISPOSITIF COUPE-FIL POUR MACHINE A COUDRE INDUSTRIELLE

摘要

A thread-cutting device for a sewing machine comprises a rigid casing fixed on one edge of the working surface of the sewing machine in a position adjacent to the fabric being sewn. A discharge tube extends from one end of the casing to a suction mouth located on the other end of the casing and faces the fabric being sewn. A blower apparatus is supplied with compressed air and comprises at least one vent located in the mouth and is designed to direct the compressed air along the discharge tube. A pivotable cutting element is mounted in the region of the suction mouth. A control element is fixed to the casing and has a rod shaped portion passing across the suction mouth which can be positioned in a plurality of reference notches located on the outside of the casing. The reference notches are arranged in accordance with the types of fabric to be sewn and are designed to position the rod-shaped portion in a direction substantially perpendicular to the feed direction of the fabric being sewn.