Knotting Machine

a machine that ties the ends of warp yarns during warping. Stationary machines tie the warp yarns on a separate stand away from the loom; mobile machines do the tying directly on the loom. There are also general-purpose machines. Mobile machines are the type most widely used. The principal working part of a knotting machine is an automatic yarn-tying head, or carriage, which picks up the yarns, feeds them to the tying mechanism, ties them, and cuts off the yarn ends. As the yarns are tied, the head automatically moves along guides on the frame of the machine. Knotting machines can tie 350–420 knots per min. They are manufactured with weaving widths of 125,175,200, and 250 cm, depending on the width of the loom.