Buttonhole sewing machine with a buttonhole cutting device

摘要

The buttonhole sewing machine has a buttonhole cutter, with a lower and an upper blade (24). The upper blade is held at a blade carrier (26) by a clamp (48) in a release mounting. The blade carrier has a permanent magnet (72) to hold the blade provisionally when the clamp is released. The clamp is tightened by a screw (64) against the blade, with a spring between the clamping paw and the blade A spring presses the blade against the carrier.