This card, again entirely provided with needles clothings, is generally made up of a drum preceded by a fly cylinder with a pair of worker-stripper cylinders, and it serves to obtain a sliver that is as highly processed as possible.

The purpose of the divider (Figure 1) is to split the sliver produced by the condenser into a certain number of rovings – this number varies according to the working width and count required – and (by means of the rubbing sleeves) and to give these a rounded form, a prelude to the cylindrical appearance of the yarn; finally it serves to wind them onto beams that will subsequently feed the spinning machines.

Fig. 1 Divider

Division of the sliver is obtained thanks to a series of leather aprons which, crossing over one another, effect a proper cutting action. Conceptually, this operation is the equivalent of drawing, and indeed the result is the same as that of a drawing of the web, numerically equivalent to the total number of divisions applied:

S divider = N° of rovings

In the woollen spinning process, the roving delivered by the divider, proceeds directly to the spinning machine, without the possibility of undergoing any further adjustment. This is unlike the considerable scope for adjustment presented by the worsted wool cycle, in which the length of the fibre allows repeated doubling operations and drawing on the drawframe. This is the reason why woollen yarn is characterised by rather high structural unevenness. This unevenness is the result of the upstream characteristics of the fibres and manifests itself in the roving stage, without there being any scope for corrective intervention in the subsequent passage to the spinning machine.