American School of Correspondence · Chicago, American school of correspondence · leaf 174
s 77.75 inches. Butafter leaving the doffer, the sliver passes between the calenderrolls on the card and then between tlie calender rolls in the coderbox, where in each case it is subjected to a slight draft. This addi-tional draft, or elongation, reduces the weight of the sliver some-what from… … bs. 163 116 COTTON SPINNING. considered in figuring the production. These rolls are 2| inchesin diameter and make 13.22 revolutions to one of the doffer. Thisgives a delivery of 88.25 inches for each revolution, instead of77.75 inches, as when taking the actual circumference of the doffer. Rule 1.…
Textile industry and fabrics
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