EP 0289010 B1 19911009 - METHOD AND DEVICE FOR CONTROLLING AND MAINTAINING A PREDETERMINED YARN QUALITY
Title (en)
METHOD AND DEVICE FOR CONTROLLING AND MAINTAINING A PREDETERMINED YARN QUALITY
Publication
Application
Priority
CH 160187 A 19870427
Abstract (en)
[origin: US4819421A] 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.
IPC 1-7
IPC 8 full level
D01H 4/46 (2006.01); D01H 1/00 (2006.01); D01H 1/11 (2006.01); D01H 1/115 (2006.01); D01H 4/02 (2006.01); D01H 4/16 (2006.01); D01H 4/42 (2006.01); D01H 13/16 (2006.01); D01H 13/32 (2006.01)
CPC (source: EP US)
D01H 1/115 (2013.01 - EP US); D01H 4/02 (2013.01 - EP US); D01H 4/42 (2013.01 - EP US); D01H 13/32 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0289010 A1 19881102; EP 0289010 B1 19911009; AT E68216 T1 19911015; DE 3865347 D1 19911114; EP 0289009 A1 19881102; IN 171021 B 19920704; JP 2635675 B2 19970730; JP S63282316 A 19881118; US 4819421 A 19890411; US 4821503 A 19890418
DOCDB simple family (application)
EP 88106780 A 19880427; AT 88106780 T 19880427; DE 3865347 T 19880427; EP 88106779 A 19880427; IN 163MA1988 A 19880314; JP 9845688 A 19880422; US 18568788 A 19880425; US 18568888 A 19880425