carding

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carding,

process by which fibers are opened, cleaned, and straightened in preparation for spinning. The fingers were first used, then a tool of wood or bone shaped like a hand, then two flat pieces of wood (cards) covered with skin set with thorns or teeth. Primitive cards, rubber-covered and toothed with bent wires, are still employed by Navajo women. Modern carding dates from the use of revolving cylinders patented in 1748 by Lewis Paul. A mechanical apron feed was devised in 1772, and Richard Arkwright added a funnel that contracted the carded fiber into a continuous sliver. See combingcombing,
process that follows carding in the preparation of fibers for spinning, lays the fibers parallel, and removes noils (short fibers). The modern combing machine is a specialized carding machine.
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carding

[′kärd·iŋ]
(textiles)
Straightening or smoothing of raw fibers in a parallel fashion, with a carding machine.