Drum Carders
The simplest machine carder is the drum carder. Most drum carders are hand-cranked but some are powered by electric motor. These machines generally have two rollers, or drums, covered with card clothing. The licker-in, or smaller roller metres fibre from the infeed tray onto the larger storage drum. The two rollers are connected to each other by a belt- or chain-drive so that the their relative speeds cause the storage drum to gently pull fibres from the licker-in. This pulling straightens the fibres and lays them between the wire pins of the storage drum's card cloth. Fibre is added until the storage drum's card cloth is full. A gap in the card cloth facilitates removal of the batt when the card cloth is full.
Some drum carders have a soft-bristled brush attachment that presses the fibre into the storage drum. This attachment serves to condense the fibres already in the card cloth and adds a small amount of additional straightening to the condensed fibre.
Read more about this topic: Carding, The Process
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