This unit, which is constituted by GK35-6A sewing head, CP4900 bags infeed device and a column, is used to close bags filled with various products e.g. foodstuff, fertilizer, feed, & chemicals. Working with various belt conveyors, it can accomplish packing operation efficiently. Speed: 6 12m/min, 240 600bags/h; Weight of the bags: 10 100kg;Height of bags: 400-900mm;Bag top folding depth: 30-60mmStart-stop: automatically by photoswitch;Thread chain cutter: automatically by air cylinder operated guillotine type cutter;Stitch length: adjustable from 6.5-11 mm, standard setting 8 mm;Standard needle: 80800 x 250#Motor: 0.37 KW for sewing head, 0.18KW for infeed;