In preparing the fibre tufts for spinning, doubling and drawing represent two essential operations and their combined
effect permits a sliver with a more regular section to be obtained (through doubling) equipped with parallel fibres
(through drawing) as well as the count requested by the spinning plan.
The drawing operation done with the machine called the drawframe (Figure 1), permits a homogeneous blend both with fibres of the same nature as well as fibres with a different nature;
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