Abstract: A circular knitting machine with rockable jacks has cams for displacing butts of the jacks along tricks in a needle cylinder, and means for rocking the jacks to provide an interruption in a guide track for certain jacks so that their other butts project and to permit butts of jacks following another track to pass through the interruption.

Abstract: A knitted fabric tube, and more particularly a portion of a garment to be worn on a foot, closed by being constrained into a constricted form without twisting of the fabric tube and retained in the closed state; and also a method and machine for producing such closed fabric tube particularly with the closure formed as part of the procedure in knitting the tube. The closure by constriction is conveniently effected by wrapping a binding thread around the fabric between parts to form plies of a double welt like portion of fabric at the position of the crease or fold of the welt like portion, portions of the binding thread extending each way from the wrapping turns being knitted into the fabric structure.