The dyeing of textile fabrics . SB iliniJi Chap. Xn.] MACHINERY FOR COTTON YARN. 259 tliat the yarn is ra-pidly and effectuallywashed in a con-tinuous manner. Figure 56 givesa perspective viewof this machine,slightly modified, inwhich the centralsystem of reels,large pulleys, tkc, issupported by meansof the framework r,and moves to andfro on the wheels ats, instead of onrockers. In both machinesthe whole actionimitates in a strik-ing manner thewashing of a hankas it would be doneby hand. Excess of wateris best removed fromwet yarn either bymeans of the hy-dro-extractor (seeFig. 72, p. 281), or
The dyeing of textile fabrics . SB iliniJi Chap. Xn.] MACHINERY FOR COTTON YARN. 259 tliat the yarn is ra-pidly and effectuallywashed in a con-tinuous manner. Figure 56 givesa perspective viewof this machine,slightly modified, inwhich the centralsystem of reels,large pulleys, tkc, issupported by meansof the framework r,and moves to andfro on the wheels ats, instead of onrockers. In both machinesthe whole actionimitates in a strik-ing manner thewashing of a hankas it would be doneby hand. Excess of wateris best removed fromwet yarn either bymeans of the hy-dro-extractor (seeFig. 72, p. 281), orby the hydraulicpress represented inFig. 90, p. 435. Drijiiig Machi-nery.—Cotton yarnis dried by suspend-ing the hanks onrods or poles, and. 260 DYEIXG OF TEXTILE FABRICS. [Chap. HI. hanging these in large and well-ventilated chambers orstoves heated by means of steam-pipes. Fig. 57 shows a continuous hank-drying arrangemcDtof MM. Tulpin freres, Rouen. It consists of a closedwooden or iron chamber a b, provided with openings ateach end for the entrance and exit of the yam Theinterior is heated by means of steam pipes, G, andcontains ventilating fans H, for agitating the heatedair. A ventilator situated above draws the moist airaway, and causes fresh air to enter the chamber. An endless chain c ti-averses the interior of the chamberin a zigzag path, and supports the ends of the rods holdingthe hanks of yam. The wet yarn is introduced at oneend of the chamber E, and it is taken off dry at theother D. A small engine F supplies the power to move theendless chain- 218. Cotton Cloth. — Dyeiivg Machinery. Cottoncloth or calico is dyed in a wooden or cast-iion dyebeck,over which a winch is supported (see Fig. 74). Thebeck is div
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