Textiles: spinning – twisting – and twining – Apparatus and processes – Open end spinning
Patent
1985-09-23
1986-06-03
Watkins, Donald
Textiles: spinning, twisting, and twining
Apparatus and processes
Open end spinning
57264, D01H 7882, D01H 7885, D01H 1100
Patent
active
045921989
ABSTRACT:
An open end friction spinning machine is provided which exhibits a plurality of adjacently arranged spinning units, each spinning unit including two adjacently arranged rollers forming a wedge-shaped gap. Yarn formation takes place inside the wedge-shaped gap with the assistance of a friction effect of the rollers. This friction effect is dependent on the one hand on the outer surface structure of the rollers and on the other hand on the strength of the suction effect of a suction device creating a suction air stream in the wedge-shaped gap. It is provided that the outer surface structure of the rollers is examined so that a portion of the friction effect dependent upon the outer surface of the rollers can be determined. In order to maintain the entire friction effect in a predetermined range, the suction effect of the suction device can be adjusted corresponding to the measured value of the friction effect due to the outer surface of the rollers.
REFERENCES:
patent: 4007457 (1977-02-01), Aeppli
patent: 4094133 (1978-06-01), Furrer
patent: 4202163 (1980-05-01), Turk et al.
Stahlecker Fritz
Stahlecker Hans
Watkins Donald
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