Core tips: A continuous tape printed or knitted with a pattern, text or mark with complementary halves is fed into a stitching machine in the reverse state.

Steps of making invisible trademark zipper:

      1. The two zipper tapes that have completed the cutting action are reverse-folded; the meshing action is performed by the slider of a zipper, and the patterns, characters or marks that were originally placed on the two zipper tapes are complementary The half part will match and align naturally;

      2. The two sprocket rows are fixed in advance through a sprocket conveying device, and the synchronization and accurate tooth-to-tooth transmission operation can be made to accurately correspond to each other's sprocket and tooth pitch. The tooth head is outward and conveyed into the suture machine together with the continuous cloth belt;

      3. The two sprocket rows are then sewn by two sets of stitches at predetermined positions on both sides of the longitudinal middle of the pattern, text or marking surface of the continuous tape;

      4. A continuous cloth tape printed or knitted with a pattern, text or mark with complementary halves is conveyed into a stitching machine in the reverse state;

      5. Using a cutting device, cut the continuous cloth belts of the two sprocket rows that have been sewn, from the middle of the longitudinal direction, to form two sprocket rows and a reverse folding cloth edge, respectively. Zipper tape.