American School of Correspondence · Chicago, American school of correspondence · leaf 252
inches, while a commonroll, of the same diam-eter, will deliver onlyfour and thirty-one one-h undredths inches,which shows that thedelivery of a metallicroll is thirty-three per cent greater, but as a fact, unless the sliveris extremely light, it will not follow the outline of the flutes… … Fig. 157 Enlarged Section of MetallicTop Rolls. 223 182 COTTON SPINNING deliver as great a length and, for this reason, it is impossible tofigure the exact production of a drawing frame with metallic rolls.It is, however, safe to estimate from twenty-five to thirty-threeper cent greater production…
Textile industry and fabrics
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