ZARIF Sewing Machine Company in Uzbekistan has launched the new ZARIF double thread chain stitch technology which is the most simple and reliable technology rather than the modern lockstitch type 301 and double thread chain stitch type 401 technologies invented in the 19th century.

The technology uses a rotating looper for the first time to tightly connect materials with the new double thread chain stitch type 401 where the loop of the top thread and the loop of the bottom thread are rotated 180 degrees.

In addition, needle in the technology does not pre-tighten the top thread loop in the previous stitch, which allows it to use the needle from the lockstitch sewing machines for the first time, i.e. the needle with one long groove that is more resistant to the longitudinal bend than the needle with two long grooves.

Also, the needle does not collide with the rotating looper when moving down. In addition, the technology provides high reliability of stitch formation without using needle guards, even when the gap between the nose of the rotating looper and the needle is 0.5 mm.

The new ZARIF double thread chain stitch technology uses two rotating two dick-shaped cam thread take-ups to tighten the stitch threads, which very smoothly tighten the stitch threads. In addition, the technology allows consumers to sew with a small stroke of 32 mm needle bar adjusting the normal tension of the threads of different materials up to 8 mm thick.