Abstract: In a stitch density adjusting device of a circular knitting machine for knitting stockings, panty hose, tights and so on, a needle cylinder is moved up and down for adjusting the density of the stitches being formed. In order to move the needle cylinder up and down, a knitting control unit having a knitting program set therein supplies a control signal to a reversible pulse motor which causes the needle cylinder to move through a movement transmission mechanism. The temperature rise in the knitting head due to friction is detected by sensor in the head and compared with a set value in a comparator which delivers a temperature difference signal to the knitting control unit. The control unit operates to compensate for the temperature rise by controlling the pulse motor.

Abstract: In order to enable knitting continuously an elastic waist part or a locally bulging breast part (C) of a knit apparel such as a body suit, brassiere, petticoat, or panties over the entire structure thereof, the stitching cams (36) and cushion cams (37) of each stitch density adjustment device (35) of a circular knitting machine are caused by signals from a stitch density adjustment control device (E) to undergo up-and-down movement relative to a second guard cam (30) independently in each knitting section (I, II, III, . . .) or simultaneously altogether with respect to all knitting sections by way of an operating ring (38). Also, for knitting various patterns, the stitching cams (36) together with other cams are caused to advance and retract in the radial direction of the knitting cylinder (2).

Abstract: A cylindrically knitted fabric is produced in a knitting region adjacent to the top of a needle cylinder of a knitting machine. The knitted fabric is guided downward around a conical nozzle and fed downward in a twisting-preventive guide cylinder rotating in synchronism with the needle cylinder. Air is ejected downward from air openings around the conical nozzle so that the knitted fabric is moved downward. Air is ejected downward from the nozzle into the cylindrical knitted fabric, which is thereby pressed against the inner surface of the guide cylinder. Upon being thus delivered from the bottom of the guide cylinder without contamination and twist, the knitted fabric is received on a conical gripper and is then conveyed by a pickup mechanism to a next processing step for producing socks, panty hose or tights.