Sewing machine for automatic cover stitching of tubular fabrics

摘要

A sewing machine with a microprocessor controlled fabric guiding and forwarding arrangement produces a covering stitch over an existing overlock stitch on a tubular fabric at a controlled distance from the edge. The controlled stitch line is maintained by continuously monitoring the material edge and guiding the material with the following machine components: an edge guiding sensor, a front edge transporting guide (50) which guides the edge of the tubular material according to the sensor signal - a rear transporting roller (60) which takes the tubular material to a position behind the stitching device.