Textiles: spinning – twisting – and twining – Apparatus and processes – Monitor and control
Patent
1988-04-25
1989-04-11
Watkins, Donald
Textiles: spinning, twisting, and twining
Apparatus and processes
Monitor and control
57401, D01H 1310, D01H 1135
Patent
active
048194212
ABSTRACT:
To control the yarn quality of a yarn produced by a textile machine, for instance a friction spinning apparatus, there is provided at the end of the friction spinning operation, however, forwardly of the pair of withdrawal rolls for the outfeed of the produced yarn, a yarn tension measuring device. Upon deviating from or falling outside of a predeterminate yarn tension tolerance value or range the yarn tension measuring device controls operation of the friction spinning apparatus such that, as required, there is accomplished an appropriate increase or decrease of the yarn tension of the yarn produced by the friction spinning apparatus. Alteration of the yarn tension can be acheived, for instance, by acting upon the drive for one of the friction spinning elements, to control the rotational speed thereof, or by selectively positioning the suction nozzle of a friction spinning element, or by controlling the size of the nip between coacting friction spinning elements, or selected combinations of such measures.
REFERENCES:
patent: 4007457 (1977-02-01), Aeppli
patent: 4058962 (1977-11-01), Spescha et al.
patent: 4489544 (1984-12-01), Morita et al.
patent: 4566262 (1986-01-01), Schumucker
patent: 4648054 (1987-03-01), Farah et al.
patent: 4677819 (1987-07-01), Stahlecker
patent: 4691509 (1987-09-01), Stahlecker
Baumgartner Josef
Binder Rolf
Egloff Peter
Stalder Herbert
Kleeman Werner W.
Maschinenfabrik Rieter AG
Watkins Donald
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