. The principles and processes of cotton yarn manufacture. inding is performed as follows: The card is firstcleaned very carefully. The belts used to drive the licker-in, doffer andflats are removed, as well as the pulley and worm shown in Fig. 58. Thedoffer is then connected directly with the cylinder by a belt running fromthe pulley which had previously been used to drive the licker-in to a CARDING 85 pulley on the doffer. This belt is an open belt, so that the doffer mustrevolve during grinding in the same direction as the cylinder, the reasonof course being that the teeth on each are incli
. The principles and processes of cotton yarn manufacture. inding is performed as follows: The card is firstcleaned very carefully. The belts used to drive the licker-in, doffer andflats are removed, as well as the pulley and worm shown in Fig. 58. Thedoffer is then connected directly with the cylinder by a belt running fromthe pulley which had previously been used to drive the licker-in to a CARDING 85 pulley on the doffer. This belt is an open belt, so that the doffer mustrevolve during grinding in the same direction as the cylinder, the reasonof course being that the teeth on each are inclined in the same main driving belt is then changed for another which will cause thecylinder to revolve in a direction opposite to its normal one. The grindingroll is placed in the brackets provided for it, and has the grooved pulleyon its end connected with a grooved pulley on the cylinder by an openbelt. A second grinding roll is placed over the doffer and connected withthe cylinder in a similar manner. i\fter all the above named operations. Fig. 61. have been done, the brackets supporting the grinding rolls are adjustedand the grinding rolls set by means of a thin gauge as near to thecylinder and doffer as possible, without being allowed to touch. Each rollis then set a little nearer, being allowed to touch the wire very closeness of the contact is determined by sound and some little prac-tice is needed before the proper setting distance can be obtained. In nocases should the contact be close enough to allow sparks to fly, and it is agood general rule that light grinding at frequent intervals is much prefer-able to heavy grinding at longer intervals Fig. bi shows a card ready for grinding. CHAPTER V DRAWING On especially high-class work, whose market price warrants the addi-tional expense incurred, it is customary to use a process known as combing. When combing is not used, the machine which follows thecard is either a railway head or a drawing frame.
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Keywords: ., bookauthorwinchest, bookcentury1900, bookdecade1900, bookyear1902
