Warburg, James P. (James Paul), 1896-1969 · [Boston] The First national bank of Boston · leaf 32
other. Six card slivers are fedtogether between two pairs of rollers, the second of which is revolvingfaster than the first. The obvious result of this is the stretching ofthat portion of the slivers which is between the two sets of rollers. Theoperation is usually performed two or three times, in… … Four Stages of Roving. There remains now only one series of operations before the yarn isready to be spun. The sliver must be reduced in size and given a cer-tain amount of twist; these objects are accomplished by the rovingframes, of which there are either three or four. The first, or…
Cotton manufacture · Cotton trade
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