. Bulletin - United States National Museum. Science. Figure 6.â Ihe Most Important Feature illustraU-d in Richard Arkvvright's British patent 1111 of December i6, 1775, provided "a crank and a frame of iron with teeth" to remove the carded fibers from the cylinder. perpetual revolving cloth, called a feeder," that fed the fibers into the Shortly afterward, the stripper rollers ^ and the doffer comb â * (a mechanical utilization of Paul's hand device) were added. Both James Hargrcavcs and Richard Arkwrighl claimed to Ije the inventor of these improvements, but i
. Bulletin - United States National Museum. Science. Figure 6.â Ihe Most Important Feature illustraU-d in Richard Arkvvright's British patent 1111 of December i6, 1775, provided "a crank and a frame of iron with teeth" to remove the carded fibers from the cylinder. perpetual revolving cloth, called a feeder," that fed the fibers into the Shortly afterward, the stripper rollers ^ and the doffer comb â * (a mechanical utilization of Paul's hand device) were added. Both James Hargrcavcs and Richard Arkwrighl claimed to Ije the inventor of these improvements, but it was Arkwright who, in 1775, first patented these ideas. His comb and crank (see fig. 6) provided a mechanical means by which the carded fibers could be removed from the cylinder. With this, the cylinder card be- came a practical machine. Arkwright continued the modification of the dofling end by drawing the carded fibers through a funnel and then passing them through two rollers. This produced a continuous sliver, a narrow ribbon of fibers ready to be spun into yarn. However, it was soon realized that the bulk charac- teristic desired in woolen yarns (but not desired in the compact types such as worsted yarns or cotton yarns) required that the wool be carded in a machine that would help prochice this. cylinder working with stationary cards and the stripping comb. Another important Britisli patent was granted in 1748 to Daniel Bourn, who invented a machine with four carding rollers set close together, the first of the roller-card type (see fig. 5). To produce a practical carding machine, however, several additional me- chanical improvements were necessary. The first of these did not appear until more than two decades later, in 1772, when John Lees of Manchester is reported to have invented a machine featuring "a - Edward Baincs, History of Ihe cotton manufacture in Great Britain, London, 1835, p. 176. 2 The wire points of the worker roller pick up the fibers from the fa
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