... vibration:the ultrasonic horn’s moving direction and the cloth’s one are inconsistency and asynchrony. With the help of our ultrasonic seamless ... Comparing to the traditional sewing which uses the needlework, if uses ultrasonic seamless sewing, no need the needle and thread, what’s ... more, high strength in sewing and welding, good sealing. Thus it ‘s much possible, to a large degree, that it ...