American School of Correspondence · Chicago, American school of correspondence · leaf 252
WmmMM Pig. 155. Shell Top Roll. arbor, is shown in the lower view of the drawing. The boss ofthe shell, C, is first covered with specially woven cloth and thenwith roller leather made from sheepskin. The solid top roll, which is sometimes used, is the same in 222 COTTON SPINNING 181 … Fig. 156. Perspective View ofMetallic Top Rolls. outline as the shell roll. The weight hooks are hung in the samemanner, but as the whole roll revolves, it necessitates oiling theneck of the roll where the weight hook bears. The weighting is so arranged that the pressure may be re-moved from the…
Textile industry and fabrics
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