Hollingsworth (u.k.) Ltd.

Walter Haworth

Alfred Wood

John Whiteley

Stephen William Yates

This invention relates to a coiler using tongue and groove rollers preferably for measuring sliver thickness and guiding sliver emerging from between these rollers, using guide means such as a pair of calender rollers driven for rotation in the same conveying direction. Optionally the sliver between the conveying nip at the tongue and groove rollers and the guide means (when embodied as calender rollers) is severed by intermittent operation of the conveying and guiding nips.

Coiler and autoleveller

A drafting system and autoleveller are arranged such that the 'tongue' roller and the 'grooved' roller of the sliver sensor ahead of the first drafting rollers serve to measure the thickness of the sliver therebetween, and their output signal is used, subject to a time delay, to vary the draft ratio in the subsequent drafting means. The autoleveller throughput speed is adjustable and the time delay in the draft ratio variation is automatically adjusted in response to the speed selected.

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Rossendale, United Kingdom

Walter Haworth