Textiles: spinning – twisting – and twining – Apparatus and processes – Elements
Patent
1980-07-06
1982-07-13
Watkins, Donald
Textiles: spinning, twisting, and twining
Apparatus and processes
Elements
57122, D01H 754
Patent
active
043387756
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns an inner ring on a spinning ring for ring spinning and ring twisting machines which is arranged coaxially inside the spinning ring, a gap-forming clearance being maintained, the upper traveller guide surface of which spinning ring is designed for taking up an inner traveller leg extending downward and outward.
Lubricated spinning rings for twisting machines with a concentrically arranged, tubular inner ring are already known from the Japanese Utility Publication Sho No. 43-13305/68 (comp. German DE-GM No. 71 40 330), in which arrangement the inner ring merely serves for preventing contamination of the bobbin packages by broken thread or yarn ends thrown about and soiled by dirty or greasy machine parts.
As the ring flange which takes up the circulating C-traveller, is located still too far away from the upper end of the inner ring, however, and as also the lower inner end of the traveller is located at about the same height as the upper edge of the inner ring, the inner ring cannot prevent unthreading of the thread or yarn downwardly along the inner leg of the traveller, if the thread or yarn tension is released, and especially if the thread forms loops during a stand-still of the spindle. Re-threading of the thread requires considerable operator effort and thus is extremely disadvantageous to an efficient and economic operation of a ring spinning or ring twisting machine.
Furthermore, these rings show the disadvantage that between the spinning ring and the inner ring a closed annular chamber is formed, in which traveller debris and fly waste can accumulate, and which thus require periodic cleaning. This disadvantage prevails also in a known, similar spinning ring according to U.S. Pat. No. 1,861,249.
Rings designed for non-unthreading travellers also are known (Japanese Utility Model No. 32263/74), which ring contains in the lower inner part of the flange guiding the traveller a groove, into which penetrates a traveller leg, bent intensely inwardly and ending upward. Furthermore a shoulder extending at an inclination downward and inward is provided on the inside of the ring, which shoulder serves as a traveller support surface while the spindle is at a standstill.
A disadvantage of this solution, however, is that no standard traveller readily available on the market can be applied, and that insertion and exchange of the special traveller proves difficult. Furthermore, a ring of this type does not ensure reliable prevention of the unthreading of the yarn or thread.
SUMMARY OF THE INVENTION
It thus is an object of the present invention to avoid the disadvantages of the rings and travellers mentioned, and to propose auxiliary means for a spinning ring, which reliably prevent unthreading even in case of loop formation, and permit use of a standard traveller and of normal rings adapted for such travellers, and in which no accumulation of traveller debris and fly waste can form between the ring and the inner ring.
This object is achieved by an inner ring constructed according to the invention, the upper end of which inner ring, for supporting the untensioned thread, is located at a higher position than the lower limit of the guide surface for the traveller leg on the unlubricated spinning ring.
The upper, outer edge of the inner ring in this arrangement is to be located with respect to the guide surface of the traveller at such a distance that the traveller is started up without contacting the inner ring.
This proves advantageous as the traveller is not influenced by the inner ring in any manner even during the phase of its start-up, in such manner that no additional thread or yarn breakages occur.
The inner ring can be mounted onto the spinning ring by a slide fit or by press fit, in such manner that the advantage of the choice of materials is obtained. The inner ring also can be glued to the spinning ring.
Particularly advantageous to manufacture is an inner ring which is part of a mounting body arranged on a ring rail of the machine for the spinn
REFERENCES:
patent: 733495 (1903-07-01), Lovejoy
patent: 1689129 (1928-10-01), Gilligan
patent: 1861249 (1932-05-01), Stuart
patent: 2464150 (1949-03-01), Roatta et al.
patent: 2464151 (1949-03-01), Roatta et al.
patent: 3374616 (1968-03-01), Hidden et al.
Kleeman Werner W.
Rieter Machine Works Limited
Watkins Donald
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