US3339359A - Spinning chamber for removing impurities from fibers - Google Patents

Spinning chamber for removing impurities from fibers Download PDF

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Publication number
US3339359A
US3339359A US603063A US60306366A US3339359A US 3339359 A US3339359 A US 3339359A US 603063 A US603063 A US 603063A US 60306366 A US60306366 A US 60306366A US 3339359 A US3339359 A US 3339359A
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fibers
impurities
spinning chamber
groove
fiber
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US603063A
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English (en)
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Ripka Josef
Lanta Jiri
Chrtek Milan
Trebova Ceska
Marsalek Milan
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
    • D01H4/10—Rotors

Definitions

  • Fibers supplied to a rotary spinning chamber are moved by the centrifugal force along an inner frustoconical surface which has an annular groove in which the fibers are retained, while impurities continue to travel on the frusto-conical surface and pass out of discharge openings.
  • a fiber strand is formed of the fibers collected in the groove and withdrawn through a withdrawal means which forms a fiber inlet chamber and a discharge chamher in the spinning chamber, and defines with the frustoconical surface a narrow annular passage for the impurities.
  • the present invention relates to an improvement of rotary spinning chambers of the type which form a fiber strand of fibers supplied into the spinning chamber and have an axial opening through which the fiber strand is withdrawn while being twisted due to the rotation of the spinning chamber.
  • Spinning chambers of this type have escape openings through which air is discharged during rotation of the spinning chamber by the action of the centrifugal force, so that negative pressure prevails in the spinning chamber for sucking the supplied fibers into the spinning chamber.
  • the spinning chambers according to the prior art have two opposite fr-usto-conical inner surfaces which form together an annular groove for collecting fibers in the region of the greatest diameter of the spinning chamber.
  • Another object of the invention is to use the air escape openings of known spinning chambers, for the discharge of impurities.
  • Another object of the invention is to construct the air escape openings in such a manner that impurities separated from the fibers are reliably discharged, and not retained on the inner wall surface between adjacent openings.
  • Another object of the invention is to supply the fibers to the spinning chamber in such a manner that they are reliably deposited on the inner surface of the spinning chamber and are not displaced by air currents in the spinning chamber.
  • an embodiment of the invention comprises a rotary spinning chamber having an outwardly flaring annular inner surface having a narrower end and a wider end; fiber inlet means communicating with said spinning chamber at said narrower end for placing fibers containing impurities on the inner surface so that fibers and impurities travel on the same toward the wider end due to the action of the centrifugal force; discharge means, for example circumferential openings, communicating with the rotary spinning chamber at the wider end of the inner surface; and annular fiber retaining means, such as an annular groove, located on the inner surface intermediate the ends of the same for retainiug the fibers.
  • the fiber retaining means is constructed in such a manner as to permit continued movement of the impurities on the inner surface toward the discharge openings. The air ejected by the centrifugal force through the discharge openings, entrains and carries the impurities out of the discharge openings.
  • impurities is used in the present application to describe foreign particles contained in the fibers. For example, crushed cotton seeds and burr remainders are always contained in the fibers, and cannot be separated by conventional spinning chambers from the fibers so that they either cause a failure of the spinning unit, or are spun into the yarn which causes breakages.
  • the impurities are urged by the centrifugal force to cross the fiber collecting groove and to move toward the wider end of the flaring inner surface and out of the discharge openings. If a smaller impurity enters the groove, it is lifted out by the spun fiber strand which is withdrawn from the groove. This may require several revolutions of the spinning chamber for repeatedly lifting the impurity. Only extremely small impurities remain in the groove with the fibers and are entrained in the spun fiber strand, but since the size of the impurities is small, they do not impair the quality of the spun yarn, and do not cause yarn breakages.
  • a withdrawal means for the spun fiber strand is disposed in the spinning chamber intermediate the ends of the flaring inner surface and in the region of the fiber retaining groove for separating the fiber inlet from the discharge openings.
  • An annular portion of the withdrawal means forms a narrow annular passage for the impurities with the impurities with the annular inner surface.
  • the fiber withdrawal means is stationary and has an annular gap in the above-mentioned annular portion located opposite j the fiber retaining groove. The gap opens into an inner of the same, so that the supplied fibers cannot be sucked into the region of the discharge openings.
  • the discharge openings are disposed so that the inner ports of adjacent discharge openings meet at the inner surface of the spinning chamber to form edges on the same which facilitate the passage of impurities through the discharge openings since it is not possible that impurities gather at surface portions between two adjacent discharge openings.
  • FIG. 1 is an axial sectional view of a spinning chamber according to one embodiment of the invention
  • FIG. 2 is an axial sectional view of a spinning chamber according to a modified embodiment of the invention.
  • FIGS. 3, 4 and 5 are sectional views taken on line A-A in FIG. 1, and illustrating modified constructions of the discharge openings of the spinning chamber;
  • FIG. 6a and FIG. 6b are fragmentary axial sectional views illustrating on an enlarged scale, two modified constructions of the fiber retaining groove.
  • FIG. 7 is a schematic general view, partially in section, including a circuit diagram, and illustrating a spinning apparatus in which the spinning chamber of the invention is used.
  • the rotary spinning chamber has two parts 2 and 3 joined in a plane perpendicular to the axis of rotation 0. Suitable fastening means, not shown, connect the two parts for rotation together.
  • Part 3 has a circular flange with a planar annular bottom face which closes recesses 20 formed in a flange 4 of part 2 which has an annular planar face abutting the planar face of flange 3.
  • the recesses 20 may be shaped as shown in FIGS. 3, 4 or 5, and are constructed in such a manner that adjacent recesses meet in edges 23 on the inner surface of part 2. Due to the fact that the open recesses are closed by the flange of part 3, they form discharge openings for the spinning chamber 1, without requiring drilling which is necessary in the construction of the prior art.
  • Spinning chamber 1 has a frusto-conical outwardly flaring inner surface 5 having a narrower end and a wider end.
  • the wider end is provided with the discharge means 4, 20, and the narrower end is closed by a stationary plate 13 provided with a fiber inlet tube 12 which is slanted to the axis of rotation of the spinning chamber and supplies fibers 24 containing impurities to the portion of the flaring inner surface 5 located adjacent cover plate 13.
  • a fiber retaining means in the form of a circular groove 7 is provided in the frusto-conical inner surface 5 substantially equidistant from the ends of the same. Fibers supplied to the narrower end of inner surface 5 will be urged by the centrifugal force to move toward fiber retaining groove 7 and into the same. Impurities which are not retained by groove 7 due to different texture, mass, shape, or dimensions as compared with the fibers, are urged by the centrifugal force to move further on the frusto-conical surface 5 and into the discharge openings 20 through which they are discharged.
  • the Withdrawal means for a fiber strand P spun of the fibers during rotation of the spinning chamber are located in the spinning chamber and include two parts.
  • the first part 8 is substantially funnel-shaped and has an outlet tube 17 passing through a central bore in cover plate 13 and being secured to the same.
  • the main portion of the funnel-shaped part 8 is frusto-conical and has a circular edge forming a narrow circular passage 9 with the inner surface 5.
  • the other part 14 may be constructed as shown in FIG. 1, and includes a rod 27 passing through an opening 28 in part 3 of the spinning chamber, and a circular plate 14 having a circular circumferential portion forming a circular passage 16 with the inner surface 5.
  • part 14' has a tubular portion 18 passing through the central opening 28 in part 3 of the spinning chamber, and a frusto-conical part with a circular circumferential portion forming a circular passage 16 with the inner surface 5.
  • Parts 14, 14' and 8, and gaps 16 and 9 are located on opposite sides of the fiber retaining and collecting groove 7.
  • Parts 14, 14 and 8 together form an inner chamber 11 in the withdrawal means 14, 14', 8.
  • the circumferential edges of parts 14, 14 and 8 form between each other a narrow circular circumferential gap which is located directly opposite the circular fiber retaining and collecting groove 7.
  • a fiber strand P formed in groove 7 is withdrawn in the embodiment of FIG. 1 through the outlet tube of funnel-shaped part 8, and in the embodiment of FIG. 2 through the outlet tube 18 of part 14' of the withdrawal means.
  • the fiber is withdrawn in the direction of the arrow 25 by transporting rollers which will be described with reference to FIG. 7.
  • the fiber strand passes through the circular gap between parts 8, and 14, 14', and the inner chamber 11 of the withdrawal means, and finally through an outlet tube. Therefore, the inner chamber 11 which receives the fiber strand from groove 7, can be considered as an inner spinning space in which the fibers are spun and twisted while passing through the outlet tube.
  • Funnelshaped member 8 forms between itself, cover plate 13, and the inner surface 5, an annular space 10 at thee narrower end 6 of the inner surface 5 into which fibers 24 are supplied through inlet tube 12.
  • Parts 14 or 14' of the withdrawal means form in the spinning chamber a discharge space 15 communicating with the discharge openings 20 at the wider end 19 of the inner surface 5.
  • Fibers and impurities supplied into space 10 travel along inner surface 5 through gap 9, and into the groove from which the fibers are withdrawn in the form of a twisted strand through the withdrawal means 14, 8.
  • Impurities which are not retained in groove 7 pass through passage 16 into space 15 where substantial suction is produced by the air ejected through openings 20 by the centrifugal force so that the impurities are ejected.
  • air currents are excluded from space 10 into which the fibers are supplied, so that the same can be properly deposited and oriented on the inner surface 5.
  • the supplied fibers are exposed to air currents which disturb the move ment on the inner surface of the spinning chamber so that they are irregularly cast against the same and not properly oriented. It is an important feature of the invention, that the withdrawal means 14, 14, 8 separate the fiber inlet means 14 from the discharge means 4, 20 for impurities.
  • a continuous frusto-conical inner surface 5 is provided in the embodiments of FIGS. 1 and 2, a continuous frusto-conical inner surface 5 is provided.
  • staggered frusto-conical surfaces are provided on opposite sides of groove 7.
  • the frusto-conical surface portions on opposite sides of groove 7 have different diameters, and in the construction of FIG. 6a, the diameter of the lower frustoconical surface portion is greater than the diameter of the upper frusto-conical surface portion adjacent groove 7.
  • the diameter of the lower frusto-conical surface portion is smaller than the diameter of the higher frusto-conical surface portion adjacent groove 7.
  • the height of the step is between 0.3 mm. and 1 mm.
  • Gaps 9 and 16 between the withdrawal means and the inner surface 5 are preferably about 1 mm.
  • the width of the annular fiber retaining and collecting groove 7 is between 0.3 and 3 mm., depending on the thickness and type of yarn which is to be produced.
  • the circular gap between the circumferential circular edges of parts 14, 14' and 8 of the withdrawal means can be adjusted by moving parts 14, 14' and 8 toward and away from each other until the width of the gap corresponds to the width of the groove 7.
  • the width of gaps 9 and 16 can be adjusted by simultaneously moving both parts of the withdrawal means in axial direction of the spinning chamber.
  • the spinning chamber 1 has a pulley 29 driven by a belt 30 from the pulley on the shaft of an electric motor 31 which can be manually started or stopped by a pushbutton switch, not shown.
  • the inlet tube 12 which is mounted on the stationary cover plate 13 communicates with a duct in a body 32 of a fiber separating device which has a combing roller 34 a portion of which projects into the inlet duct.
  • Combing roller 34 has peripheral teeth or needles for combing fibers out of a roving or sliver 53 supplied to combing roller 35 by a feeding roller 40.
  • Combining roller 34 is driven by a motor 36 through a coupling and a pair of bevel gears 37, 38.
  • Feeding roller 35 is driven by a motor 42 through a coupling and a worm gear drive 40, 41.
  • the spun and twisted yarn P is withdrawn from the withdrawal means 14, 8 by a pair of transporting rollers 43, one of which carries a pulley which is connected by a belt 44 to another pulley 45 on the shaft of a worm gear 46 driven by motor 49' through a coupling and a worm 47.
  • Pulley 45 is also connected by belt 52 to a yarn distributing roller 51 which is operated to form a criss-cross yarn package on a take-up reel 50.
  • the roving 53 containing impurities is fed by roller 40 to the combing roller 37 which combs fibers containing impurities out of the roving and delivers it to the inlet tube 12 in which suction prevails due to the rotation of spinning chamber 1 which causes explusion of the air through discharge openings 20 by the action of the centrif-ugal force.
  • Negative pressure is produced in the fiber inlet space since air is drawn through passages 9 and 16 into the discharge space 15.
  • the air stream in space 10 and inlet tube 12 moves the fibers toward the narrower end of the inner surface 5 so that the fibers and impurities therein are moved by the centrifugal force along surface 5, through circular passage 9, and into groove 7.
  • a bundle or strand of fibers is formed which is withdrawn through the inner chamber 11 of the withdrawal means 14, 8, and twisted in the outlet tube 18 or 17.
  • the impurities are particles of crushed cotton seeds and burr remainder, and it has been found that in one gram of the fiber mass, between 30 and 90 foreign particles are contained, the weight of the impurities being between 1.3 and 6.1 mg. for 1 gram of the fiber mass.
  • the length and width of most impurities is many times greater than the thickness thereof, one of the dimensions thereof being between 0.6 and 6 mm. so that most impurities are longer than the width of the fiber collecting groove 7.
  • the size of the impurities is influenced by the manner in which the cotton has been processed, and particularly by the carding operation during which very large foreign particles are broken up.
  • the groove is about 1 mm. wide, and at least 1 mm. deep measured at the lowest cross-sectional point thereof.
  • the size of the offset and of the recession, respectively, provided in the inner surface 5 is preferably within the range of 0.3 and 1 mm.
  • the centrifugal force causes the particles to cross the groove and move onto the portion of the inner surface 5 located in the discharge space 15 so that the particles are driven by the centrifugal force and by the air stream into and out of the discharge openings 40.
  • the impurities have to move over the step formed by the different fr-usto-conical surfaces of surface 5.
  • the particles In the event that the particles are smaller than the groove dimensions, the particles enter the groove, but are also lifted out by the fiber strand onto the upper portion of the frusto-conical inner surface '5. Several revolutions may be required for removing some of the foreign particles from the groove. If the particles forming the im purities are extremely small, they remain in the fibers and are spun into the fiber strand and yarn, but due to the smallsize of such impurities, they do not cause yarn breakages, and the quality of the twisted yarn is not impaired.
  • a disadvantage of the embodiment of FIG. 6d results in the leakage of fibers across the groove so that some fibers are blown out of the discharge openings 20 and not retained in groove 7 to be spun into the. twisted yarn. Such fiber loss will not occur in the embodiment of FIG. 60! under normal operating conditions when the groove is not completely filled with fibers.
  • the thickness of the fiber strand formed in the groove, and consequently the thickness of the twisted ya'rn withdrawn through the withdrawal means, depends on the dimensions of the groove 7.
  • the funnel-shaped circular body 8 which separates the fiber inlet space 10 from the spun yarn P, prevents an adhering of the fibers to the finished spun yarn P.
  • the part 14 or 14' prevents the sucking of the fiber strand and twisted yarn toward the discharge openings 20.
  • the withdrawal means 14, 14', 8 separate the supplied fibers from the finished yarn and from the discharge openings.
  • the withdrawal of the yarn through the inner spinning and twisting space 11 protects the yarn from fibers and impurities already separated from the fibers.
  • the circular groove 7 can retain only a certain amount of fibers, and surplus fibers will pass through gap 16 and be discharged through discharge openings 23 where they may be collected. However, it is not possible to overfill the fiber retaining and collecting groove 7 as in the constructions of the prior art, and the incidence of thicker portions or slubs in the spun yarn can be reduced to a minimum.
  • a spinning apparatus in combination, a rotary spinning chamber having an outwardly flaring annular inner surface having a narrower end and a wider end; fiber inlet means communicating with said rotary spinning chamber at said narrower end of said inner surface for placing fibers containing impurities on said inner surface so that said fibers and impurities travel on the same toward said wider end due to the action of the centrifugal force; discharge means communicating with said rotary spinning chamber at said wider end of said inner surface; and annular fiber retaining means extending substantially in a plane perpendicular to the axis of rotation of said spinning chamber, and being located on said inner surface intermediate said ends of the same for retaining only said fibers, but permitting continued movement of said impurities on said inner surface toward said discharge means so that said impurities are discharged through said discharge means.
  • said fiber strand withdrawal means is stationary and has an annular gap in said annular portion opposite said fiber retaining means, an inner chamber, and an outlet located in the axis of rotation of said spinning chamber whereby the fiber strand formed by said fiber retaining means can be withdrawn through said annular gap, said inner chamber, and said outlet and is twisted in said withdrawal means during rotation of said spinning chamber.
  • said withdrawal means includes a funnel-shaped part located in said spinning chamber at said narrower end of said inner surface and 'having an annular edge closely adjacent said inner surface, said funnel-shaped part forming a fiber inlet chamber with said inner surface between said narr-ower end and said fiber retaining means, and a second part having said annular portion forming said gap with said annular edge of said funnel-shaped part, and forming said annular passage with said inner surface, said funnelshaped part and said second part forming said inner chamber in said withdrawal means, which receives the fiber strand from said fiber retaining groove through said gap.
  • each of said parts of said withdrawal means has a tube located in the axis of rotation of said spinning chamber and projecting out of the same; and transporting means located opposite the end of one of said tubes for withdrawing the fiber strand through the respective tube.
  • said spinning chamber has an annular wall having said inner surface, said annular wall having a wider end portion and a narrower end portion; and wherein said discharge means include a plurality of circumferential discharge openings in said wider end portion, adjacent discharge openings meeting at said inner surface to form edges on said inner surface so as to facilitate the passage of impurities through said discharge openings.
  • said spinning chamber has an annular wall having said inner surface, said annular wall having a wider end portion and a narrower end portion; and wherein said discharge means include a plurality of circumferential discharge openings in said wider end portion, adjacent discharge openings meeting at said inner surface to form edges on said inner surface so as to facilitate the passage of impurities through said discharge openings.
  • each discharge opening has a first port on said inner surface and a second port on the outer surface of said wider wall end portion, said first port being wider than said second port, said first ports being separated by said edges.
  • said spinning chamber has two parts, one of said parts having open peripheral recesses at said wider end of said inner surface, and the other part closing said recesses partly to form discharge openings connecting the interior of said spinning chamber with the outside and constituting said discharge means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US603063A 1965-12-20 1966-12-19 Spinning chamber for removing impurities from fibers Expired - Lifetime US3339359A (en)

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AT (1) AT264337B (US06582424-20030624-M00016.png)
BE (1) BE689528A (US06582424-20030624-M00016.png)
CH (1) CH449485A (US06582424-20030624-M00016.png)
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3405512A (en) * 1965-10-01 1968-10-15 Massey Ferguson Ind Ltd Hay conditioner
US3411283A (en) * 1966-03-31 1968-11-19 Toyoda Automatic Loom Works In Spinning apparatus utilizing airstream
US3425205A (en) * 1966-11-19 1969-02-04 Schubert & Salzer Maschinen Method and apparatus for strand quality control in rotary spinning chambers
US3511043A (en) * 1967-09-27 1970-05-12 Rieter Ag Maschf Open end spinning device
US3538698A (en) * 1968-08-10 1970-11-10 Vyzk Ustav Bavlnarsky Break-spinning apparatus
US3777466A (en) * 1969-05-16 1973-12-11 Vyzk Ustav Bavlnarsky Method of removing impurities and similar matter from staple fibres in ringless spinning and device for performing said method
US3778990A (en) * 1971-06-21 1973-12-18 Skf Kugellagerfabriken Gmbh Device for open end spinning
US3797218A (en) * 1969-03-20 1974-03-19 Schubert & Salzer Maschinen Method and apparatus for spinning sliver
US3798887A (en) * 1972-06-23 1974-03-26 Alsacienne Constr Meca Apparatus for spinning non-continuous fibers in a rotary bowl
US3908349A (en) * 1973-09-19 1975-09-30 Kaiwa Boseki Kabushiki Kaisha Fiber guiding plate for a rotary spinning chamber of an open end spinning machine
US3952494A (en) * 1973-10-24 1976-04-27 Vyzkumny Ustav Bavlnarsky Open-end spinning unit with a spinning rotor
US3958403A (en) * 1974-05-03 1976-05-25 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Open-end spinning unit with fiber guide disc
US4154052A (en) * 1978-02-08 1979-05-15 Dixie Yarns, Inc. Automatic cleaning system for open-end spinning apparatus
US5694759A (en) * 1996-03-08 1997-12-09 Waverly Mills, Inc. Process for producing polyester yarns on an open end spinning machine and yarns thus produced

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1201167A (en) * 1967-12-08 1970-08-05 Vnii Legkogo Textil Masch A device and process for spinning yarn
DE2906344A1 (de) * 1979-02-19 1981-01-22 Taschkentskoe Sp K Bjuro Tekst Spinnkammer einer einrichtung zum ringlosen spinnen
DE2944374C2 (de) 1979-11-02 1984-07-05 Taškentskoe special'noe konstruktorskoe bjuro tekstil'nych mašin, Taškent Spinnrotor einer Offenendspinnmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB477259A (en) * 1937-06-05 1937-12-24 Svend Ejnar Berthelsen Improved method and means for the centrifugal spinning of fibrous material
US2911783A (en) * 1959-11-10 Process and apparatus for spinning a yarn
US2928228A (en) * 1957-01-29 1960-03-15 Gotzfried Kourad Pneumatic spinning device
US3115001A (en) * 1962-09-18 1963-12-24 Vyzk Ustav Bavinarsky Spinning apparatus
US3163976A (en) * 1962-05-25 1965-01-05 Alsacienne Constr Meca Spinning device
US3210923A (en) * 1960-07-28 1965-10-12 Spinnbau Ges G M B H Device for spinning staple fibers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911783A (en) * 1959-11-10 Process and apparatus for spinning a yarn
GB477259A (en) * 1937-06-05 1937-12-24 Svend Ejnar Berthelsen Improved method and means for the centrifugal spinning of fibrous material
US2928228A (en) * 1957-01-29 1960-03-15 Gotzfried Kourad Pneumatic spinning device
US3210923A (en) * 1960-07-28 1965-10-12 Spinnbau Ges G M B H Device for spinning staple fibers
US3163976A (en) * 1962-05-25 1965-01-05 Alsacienne Constr Meca Spinning device
US3115001A (en) * 1962-09-18 1963-12-24 Vyzk Ustav Bavinarsky Spinning apparatus

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3405512A (en) * 1965-10-01 1968-10-15 Massey Ferguson Ind Ltd Hay conditioner
US3411283A (en) * 1966-03-31 1968-11-19 Toyoda Automatic Loom Works In Spinning apparatus utilizing airstream
US3425205A (en) * 1966-11-19 1969-02-04 Schubert & Salzer Maschinen Method and apparatus for strand quality control in rotary spinning chambers
US3511043A (en) * 1967-09-27 1970-05-12 Rieter Ag Maschf Open end spinning device
US3538698A (en) * 1968-08-10 1970-11-10 Vyzk Ustav Bavlnarsky Break-spinning apparatus
US3797218A (en) * 1969-03-20 1974-03-19 Schubert & Salzer Maschinen Method and apparatus for spinning sliver
USRE30709E (en) * 1969-05-16 1981-08-18 Vyzkumny Ustav Bavlnarsky Method of removing impurities and similar matter from staple fibres in ringless spinning and device for performing said method
US3777466A (en) * 1969-05-16 1973-12-11 Vyzk Ustav Bavlnarsky Method of removing impurities and similar matter from staple fibres in ringless spinning and device for performing said method
US3778990A (en) * 1971-06-21 1973-12-18 Skf Kugellagerfabriken Gmbh Device for open end spinning
US3798887A (en) * 1972-06-23 1974-03-26 Alsacienne Constr Meca Apparatus for spinning non-continuous fibers in a rotary bowl
US3908349A (en) * 1973-09-19 1975-09-30 Kaiwa Boseki Kabushiki Kaisha Fiber guiding plate for a rotary spinning chamber of an open end spinning machine
US3952494A (en) * 1973-10-24 1976-04-27 Vyzkumny Ustav Bavlnarsky Open-end spinning unit with a spinning rotor
US3958403A (en) * 1974-05-03 1976-05-25 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Open-end spinning unit with fiber guide disc
US4154052A (en) * 1978-02-08 1979-05-15 Dixie Yarns, Inc. Automatic cleaning system for open-end spinning apparatus
US5694759A (en) * 1996-03-08 1997-12-09 Waverly Mills, Inc. Process for producing polyester yarns on an open end spinning machine and yarns thus produced
US5699659A (en) * 1996-03-08 1997-12-23 Waverly Mills, Inc. Process for producing substantially all-polyester yarns from fine denier feed fibers on an open end spinning machine

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CH449485A (de) 1967-12-31
BE689528A (US06582424-20030624-M00016.png) 1967-04-14
FR1504093A (fr) 1967-12-01
AT264337B (de) 1968-08-26

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