Polychromatic yarn dyeing apparatus

A polychromatic yarn dyeing apparatus comprising:

• an upper track portion having at least one pair of upper wheels disposed in parallel, an upper caterpillar unit rotatably travelling around the upper wheels in a traveling direction, and a plurality of upper dyeing members coupled with the upper caterpillar unit;
• a lower track portion having at least one pair of lower wheels disposed in parallel, a lower caterpillar unit rotatably travelling around the lower wheels at the same travelling speed as that of the upper caterpillar unit in a traveling direction and having a travelling section parallel to and moving in an advancing direction with a travelling section of the upper caterpillar unit, and a plurality of lower dyeing members coupled with the lower caterpillar unit, the lower dyeing members contacting the upper dyeing members along the traveling section with a yarn being positioned therebetween;
• a plurality of dye supplying parts disposed sequentially along the travelling direction of the lower caterpillar unit, for supplying dyestuff of different colors respectively to the lower dyeing members;
• and
• an oscillating unit for oscillating the upper dyeing members in the traveling section thereof in a transverse direction relative to the advancing direction of the upper caterpillar unit.

A polychromatic yarn dyeing apparatus comprising:

• an upper track portion having at least one pair of upper wheels disposed in parallel, an upper caterpillar unit rotatably travelling around the upper wheels in a traveling direction, and a plurality of upper dyeing members coupled with the upper caterpillar unit;
• a lower track portion having at least one pair of lower wheels disposed in parallel, a lower caterpillar unit rotatably travelling around the lower wheels at the same travelling speed as that of the upper caterpillar unit in a traveling direction and having a travelling section parallel to and moving in an advancing direction with a travelling section of the upper caterpillar unit, and a plurality of lower dyeing members coupled with the lower caterpillar unit, the lower dyeing members contacting the upper dyeing members along the traveling section with a yarn being positioned therebetween;
• and
• a plurality of dye supplying parts disposed sequentially along the travelling direction of the lower caterpillar unit, for supplying dyestuff of different colors respectively to the lower dyeing members, wherein each of the dye supplying parts comprises (a) a dye reservoir for containing the dyestuff, (b) a dye belt forming a closed loop and having a portion dipped in the dye reservoir to contact the dyestuff and an upper section contacting with the lower dyeing members of the lower caterpillar unit, and (c) a dye belt driving unit for driving the dye belt in an opposite direction to the traveling direction the lower caterpillar unit.