... with ultrasonic sealing 3.automatic paper feeding, ultrasonic welding, The double PE coated paper cup forming machine with ultrasonic sealing ... cups through the procedure of automatic paper feeding, ultrasonic welding, top mouth lubrication, bottom punching, two times of ... knurling, curling, and cup discharging.Specifications of double PE coated paper cup forming machineSpecification of Paper Cup4-12 ...