118 



TEXTILE FIBRES. 



form length, and lie cohesively in a nearly straight, sliver-like line, often 

 termed parallel. 



Carded Yarns. The use of the comber is obviated when yarns of 

 medium and medium fine counts only are required. The impurities and 

 shorter fibres that may be present in the cotton are removed as the 

 material passes through the various processes of hopping, opening, carding,' 

 and spinning. 



Fig. 78 is an example of a good sliver from a carding engine of the 

 revolving flat type. It has been contracted from the broad web of the 

 card by passing through the draw-box and the coiler-box. The sliver is 



Fig. 78. Example of a good sliver. 



not uniform in thickness, and varies considerably ; therefore, to avoid the 

 irregularity, it is necessary to double them repeatedly. 



The drawing sliver from the last multiple of doublings gives a sliver 

 with the fibres arranged parallel, imbricated all in one direction 

 in a nearly straight line. The number of doublings is generally 216 

 for medium counts of yarn and 512 for some of the finer counts of 

 slivers. 



The drawing sliver from the last head is fed to the slubber, and each 

 sliver is twisted into a slubbing strand similar to those shown in fig. 79. 



Fig. 80 represents the strands from the intermediate frame. Each of 

 these strands has been unwound from an intermediate bobbin, and each 



