American School of Correspondence · Chicago, American school of correspondence · leaf 271
top cone concave and thebottom cone convex. 239 198 COTTON SPINNING The cone belt is upon the large end of the top cone when thewinding begins and, as each successive layer of roving is added, it isshifted a little distance along the cones, according to the hank roving,being spun. With coarse… … BOBBIN I DIA.SPEED 1200 RPM BOBBIN 2 DlA.SPEED 600R.P.M. BOBBIN 3 DIA.SPEED 400R.P.M. BOBBIN 4 DIA.SPEED300R.P.M. Fig. 166. Diagram of Cones. stages of building, are shown in Fig. 166. The diameter of the emptybobbin is one inch and that of the full bobbin, four inches. The rov-ing, which we will…
Textile industry and fabrics
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