Cam and wobble follower looper drive for sewing machine
Cam controlled gate spring for chain stitch sewing machine
Chain stitch sewing machine
Chain stitch sewing mechanism
Chain stitching apparatus
Chaining-off device for multiple needle chainstitch sewing machi
Cloth feeding device for sewing machine and method thereof
Control for a differential feed regulating device in sewing mach
Control mechanism for driving upper looper of sewing machines