Such machinery have adopted the needle bar thread-taking-up mechanism, the shuttle hook thread-hooking mechanism and the cam mechanism for feeding to form the chain stitches. They feature stable performances. Through the simple adjustment, the sewing of buttons of different specifications can be carried out. The maximum sewing speed reaches 1500 R.P.M. The operation is smooth and the sewing stitches are beautiful, correct, stable and reliable. The unique preparation shutdown mechanism can reduce the impact force from the shutdown. The presser foot is adopted to lift the interlinkage mechanism. The simple thread-cutting mechanism can produce clean thread cutting.
