D - Textiles – Paper – 01 – H
Patent
D - Textiles, Paper
01
H
341/42, 19/9
D01H 5/42 (2006.01) D01H 5/38 (2006.01)
Patent
CA 1102082
METHOD AND MEANS FOR REGULATING SLIVER DRAFT UNIFORMITY Abstract of the Disclosure The draft imparted to sliver during regular operation of a sliver drafting apparatus is correctively varied in propor- tion to uniformity variations then detected in the sliver. Dur- ing at least part of each period of start-up of the apparatus, the sliver is subjected to a prescribed correction draft approxi- mately equal to an average of the draft corrections applied to the sliver over a relatively long time interval during the last- ensuing regular operation of the apparatus. During that initial part of each start-up period required for the apparatus to accelerate to substantially full operating speed, the prescribed correction draft is either not applied or, alternatively, is scaled in proportion to the speed of the apparatus. Preferably the correction draft applied to the sliver during transition from start-up to regular operation of the apparatus is approximately equal to the sum of the prescribed correction draft applied during the start-up period, and any additional correction draft resulting from uniformity variations then detected in the sliver.
316235
Meredith & Finlayson
Platt Saco Lowell Limited
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