SEWING MACHINE WITH GUIDE AND IRONING MEANS FOR FOLDING BACK AND PRESSING STITCHED FABRIC MARGINS

摘要

A sewing machine provided with guide means and ironing means having an ultrasonic heating means. The guide means folds back the free margins of an upper and lower fabric pieces, and the folded margins are pressed or ironed by the ultrasonic heating means. The ultrasonic heating means includes an ultrasonic horn and an anvil relatively movable toward and away from each other. A thickness detector is provided for detecting a combined thickness of the upper and lower fabric pieces, and control means is also provided for controlling one of the heating energy of the ultrasonic heating means and a distance between the horn and the anvil in response to the detected thickness.