Two actions are taken place in draw frame process.
Since the carded sliver contains a large percentage of hooked and curled fibres so that these fibres necessitate to straighten properly. Drafting process allows to straighten these fibres.
In the process of doubling, two or more carded slivers are taken and they are fed together.
The weight per unit length of the input sliver is reduced in the process of drafting.
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