Yarn feeding device of a circular knitting machine

A yarn feeding device for a circular knitting machine comprising a mounting frame having a top and secured to the circular knitting machine, a yarn guide plate having a plurality of thread eyes for passing yarn and secured to said top of said mounting frame, a driving wheel having a wheel shaft and mounted on said mounting frame above said yarn guide plate, a yarn guide bracket having first and second rows of thread eyes for passing of said yarn and mounted on said mounting frame below said yarn guide plate,

• a yarn feeding wheel set including a plurality of feeding wheels, each said feeding wheel including a metal wheel hub, a plastic yarn feeding wheel secured to said metal wheel hub and a rubber collar arranged around said plastic yarn feeding wheel;
• each said plastic yarn feeding wheel having a wheel face and an annular flange around said wheel face so that an annular convex portion is formed around a periphery of said rubber collar for separating two runs of said yarn after said collar is mounted around said plastic yarn feeding wheel;
• said plurality of feeding wheels mounted around said wheel shaft of said driving wheel by screws and washers with said metal hubs of said feeding wheels longitudinally arranged along said wheel shaft, and
• a plurality of yarn tension guides respectively mounted on said yarn guide bracket, said yarn tension guides being arranged adjacent said first row of thread eyes of said yarn guide bracket;
• each of said yarn tension guides having a rotating tension adjustment plate and a yarn tension guide rod, said rotating tension adjustment plate contacting yarn tension guide rod, so that when said rotating adjustment tension plate is turned relative to said yarn tension guide rod, said rotating tension adjustment plate interacts with said yarn tension guide rod thereby changing an oscillating amplitude of said yarn tension guide rod and a degree of circumferential engagement of a respective yarn with said wheel face of a respective said yarn feeding wheel.