... weldin Functions of This semi-auto ultrasonic ear loop Welding Machine:1.Smart design and easy for ... the ear-loops for disposable masks, inner/outside ear-loop masks, cup masks, duckbill masks and other special ... the mask blank, then start to weld the ear-loop with manual, easy for operation, and the welding ... much more convenient, mainly used to the ear-loop welding for N95 masks such as cup type masks ...