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AssigneeZellweger Uster AG
InventorsErnst Felix, Peter Feller
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A rapidly reacting measuring element is used at the delivery of the drafting zone on autolevelling drawframes used in the textile industry, which makes it possible to superimpose on the signal thus obtained from the measuring element by means of an electronic system a further measurement signal at the delivery of the drawing passage and thus correct the parameters governing the drafting values in such a way that even short-term variations in cross-section of the textile material are levelled out. The critical factors here are especially the delay time T of the textile material between the correcting element (pair of drafting rollers with variable speed of rotation) and the measuring element and also the overall amplification V of the measurement signal.
A method for controlling the drawing process on autoleveller drawframes in the textile industry, wherein textile material is passed through a drafting zone formed by front and rear pairs of drafting rollers, comprising the steps of measuring the cross-section of the textile material before it reaches said drafting zone to produce a first test signal representing said measured cross-section, amplifying said first test signal and supplying said amplified first test signal with a selected delay as a control signal;
An apparatus for controlling the drawing process on autoleveller drawframes in the textile industry, wherein textile material is passed through a drafting zone formed by front and rear pairs of drafting rollers, comprising:
Dependencies are inferred from the claim text.