US3924393A - Apparatus for piecing a thread in an open-end spinning unit - Google Patents

Apparatus for piecing a thread in an open-end spinning unit Download PDF

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Publication number
US3924393A
US3924393A US513776A US51377674A US3924393A US 3924393 A US3924393 A US 3924393A US 513776 A US513776 A US 513776A US 51377674 A US51377674 A US 51377674A US 3924393 A US3924393 A US 3924393A
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thread
piecing
open
spinning unit
unit according
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US513776A
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English (en)
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Fritz Stahlecker
Hans Stahlecker
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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
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/50—Piecing arrangements; Control therefor for rotor spinning

Definitions

  • ABSTRACT Apparatus for piecing a thread in an open-end spinning unit having a spinning rotor with a ring of opened-up fibers including opening means having comb means for combing out the thread end and a device for returning the thread end into the spinning rotor after combing thereof by the comb.
  • Preferred embodiments of the invention include combs mounted on rotor wheels, as well as combs disposed on planar members.
  • Preferred embodiments include backing members for backing the thread during combing operation, with embodiments including pairs of combing members disposed at opposite sides of the thread to comb and backup the same simultaneously.
  • Clamping devices are provided for clamping the thread at positions on opposite side of the combing devices and for pulling the thread apart after it has been weakened by the combing operation.
  • separate severing or cutting devices are provided for cuttin'g off the extreme end portion of the thread end after the combing operation.
  • a piecing of a thread is necessary when a machine is put back into operation after a standstill, as well as any time the thread breaks.
  • Devices have been contemplated for this purpose, by means of which a thread end is returned into the spinning rotor, attached to the fiber ring deposited at that location, and then taken off again. In this operation, certain conditions must be exactly maintained, such as, for example, the instant of attachment, the length of the returned thread, and the speed of returning and take-off in order to obtain a satisfactory piecing effect.
  • the present invention is based on the problem of providing an apparatus of the type mentioned hereinabove, making it possible to effect an improved piecing step while avoiding a thickening of the yarn as well as any reduction in tear strength.
  • the invention contemplates providing an opening device for the thread end which contains means for combing out the thread end. Thereby, the thread end is opened up, prior to being returned into the spinning rotor and before it is attached to the ring of fibers deposited at that location, to such an extent that its condition corresponds approximately to the condition of the fiber ring. Consequently, a satisfactory attachment is made possible without a thickening of the yarn or a reduction in tear strength.
  • a clamping means is provided for the thread, followed by a combing out device movable toward the thread end.
  • a device which cuts the thread to length after the clamping means and in the close proximity after the combing out device.
  • the thread length necessary for the piecing step is determined, on the one hand, while it is ensured, on the other hand, that the thread end is in the zone of the opening device.
  • clamping zones are arranged on both sides of the combing or carding means, the outer one of these zones, which faces away from a windup spool, being movable in the longitudinal direction of the thread. During carding or combing, a weakening of the thread is produced in this zone, which then will result in rupturing of the thread at this point, if the outer clamping zone is moved in the longitudinal direction of the thread, for example by spring force or the like.
  • FIG. 5 is a side schematic view which shows a fifth preferred embodiment according to the present invention of apparatus for piecing a thread end.
  • FIG. 1 shows only a spinning rotor 2 of an open-end spinning unit 1 wherein, with the aid of feeding and opening means, not shown, a ring 3 of opened up fibers is continuously deposited. Via a yarn takeoff duct 4, the ring 3 is withdrawn as a continuously spun thread. This thread is wound onto a windup spool 8 which, during normal operation, rests on a winding roll 6 by which it is driven. To mend a thread break, a thread end of the thread 5 is returned via the yarn takeoff duct 4 into the spinning rotor 2, attached to the ring 3 of opened up fibers located therein, and then again withdrawn.
  • the return and withdrawing motions required for this procedure are controlled, for example, by an auxiliary winding roll 7 on which the windup spool 8 rests during the piecing step.
  • an opening device 10 Before the thread end is fed to the yarn takeoff duct 4, by way of which it is then sucked into the spinning rotor 2 with the aid of a vacuum, it is opened up by an opening device 10 in order to adapt its condition to the condition of the ring 3 of opened up fibers.
  • the opening means 10 illustrated schematically in FIG. 1 contains a clamping zone 11 into which the thread 5 is laid manually or mechanically.
  • a combing out or carding roll 12 follows the clamping zone 11, this roll being provided with a tooth-like or pin-type trim along its periphery.
  • the combining out roll 12 is driven about an axis disposed at right angles to the longitudinal direction of the thread. The direction of rotation is chosen so that the trim of the carding roll 12 combs out the thread end in a direction away from the clamping zone 11.
  • a device 13 is arranged which cuts the thread 5 to length and fixes the thread end.
  • the remaining piece of thread 144 (FIG. 2) can be removed, for example by suction with the aid of a suction nozzle 9.
  • a blowing nozzle 14 is disposed in opposition to the carding roll 12 on the other side of the thread end; this nozzle urges the thread end into the area of the trim of the combing out roll, so that an effective carding action is obtained which is furthermore supported by the air jet.
  • the clamping zone or station 11 is arranged on a swivel arm 16 pivotable about an axle 15. This arm 16 is swiveled so that the opened up thread end is offered to the mouth of the yarn takeoff duct 4, via which the thread end is then sucked into the spinning rotor 2 (see the position 11, 16' shown in dot-dash lines).
  • FIG. 2 corresponds in its function substantially to the embodiment of FIG. 1.
  • the opening means differs in that, in this embodiment, a second clamping zone or station 17 is provided in place of a cutting device 13, this clamping zone seizing the thread behind the carding roll 12.
  • the second clamping zone 17 is movably disposed in the longitudinal direction of the thread, in a manner not shown in detail, so that it can be moved away from the carding roll 12, for example with the aid of a motor or a spring or the like.
  • the opening of the thread in the area of the carding roll 12 leads to a weakening of the thread, so that it will break in this region upon movement of zone 17. Accordingly, an opened up thread end can be produced which can be returned into the spinning rotor 2 in the manner described in conjunction with FIG. ll.
  • the cut off piece of thread 144 can then be sucked up by nozzle 9.
  • a resilient trough 18 is provided in place of blast nozzle 14 of FIG. 1.
  • This trough 18 serves as the support for the thread end to be combed out and is arranged in opposition to the carding roll 12 on the other side of the thread end.
  • This trough is formed of a curved leaf spring attached to the lower part of the clamping zone 11.
  • two comb-like carding elements 19 and 20 are provided subsequently to the clamping zone 11. Elements 19 and 20 receive the thread end between them and are driven in the direction of the thread end away from the clamping zone 11.
  • the clamping zone 11 in this embodiment, consists of a support 21 associated with a clamp 22, the latter contacting the thread 5 with its free end.
  • two identical means for carding purposes are arranged on both sides of the thread 5, in a similar manner as in the embodiment of FIG. 4, so that a base member or support can be omitted.
  • two carding rolls 12 and 23 are provided, both of which are equipped with a trim constituted by teeth or pins 160a.
  • the directions of rotation of the two carding rolls 12 and 23 are selected so that both work on the thread end with their trims in the zone between them in a direction away from the clamping zone 11.
  • Apparatus for piecing a thread end in an open-end spinning unit having a spinning rotor with a ring of opened-up fibers comprising:
  • opening means including comb means for combing out the thread end
  • Apparatus for piecing a thread end in an open-end spinning unit according to claim 1, wherein a clamping device is provided for clamping said thread at a position spaced further from the extreme end of said thread than is said comb means.
  • Apparatus for piecing a thread end in an open-end spinning unit according to claim 2, wherein said opening means includes means for moving said comb means toward the extreme end of said thread to effect said combing.
  • Apparatus for piecing a thread end in an open-end spinning unit according to claim 1, wherein a cutting device is provided for cutting the thread at a position spaced from said comb means.
  • Apparatus for piecing a thread end in an open-end spinning unit wherein a cutting device is provided for cutting said thread, said cutting device being disposed at the side of said comb means opposite said clamping device.
  • Apparatus for piecing a thread end in an open-end spinning unit according to claim 1, wherein a pair of clamping devices are provided for clamping said thread at respective opposite sides of said comb means.
  • Apparatus for piecing a thread end in an open-end spinning unit according to claim 6, wherein the one of said clamping devices which is closest to the extreme free end of said thread is movable in the longitudinal direction of the thread for accommodating severing of the thread while being clamped by said clamping devices.
  • Apparatus for piecing a thread end in an open-end spinning unit according to claim 1, wherein a resilient support is arranged in opposition to said comb means for supporting said thread end during combing thereof.
  • Apparatus for piecing a thread end in an open-end spinning unit according to claim 3, wherein a resilient support is arranged in opposition to said comb means for supporting said thread end during combing thereof.
  • Apparatus for piecing a thread end in an openend spinning unit according to claim 5, wherein a resilient support is arranged in opposition to said comb means for supporting said thread end during combing thereof.
  • Apparatus for piecing a thread end in an openend spinning unit according to claim 7, wherein a resilient support is arranged in opposition to said comb means for supporting said thread end during combing thereof.
  • Apparatus for piecing a thread end in an openend spinning unit according to claim 1, wherein said comb means includes a pair of combing members disposed at opposite sides of the thread and movable in the same longitudinal direction with respect to the thread during combing thereof.
  • Apparatus for piecing a thread end in an openend spinning unit according to claim 5, wherein said comb means includes a pair of combing members disposed at opposite sides of the thread and movable in the same longitudinal direction with respect to the thread during combing thereof.
  • Apparatus for piecing a thread end in an openend spinning unit according to claim 7, wherein said comb means includes a pair of combing members disposed at opposite sides of the thread and movable in the same longitudinal direction with respect to the thread during combing thereof.
  • Apparatus for piecing a thread end in an openend spinning unit according to claim 1, wherein a blowing means is arranged in opposition to said comb means for supporting said thread end against said comb means during combing thereof.
  • Apparatus for piecing a thread end in an openend spinning unit according to claim 5, wherein a blowing means is arranged in opposition to said comb means for supporting said thread end against said comb means during combing thereof.
  • Apparatus for piecing a thread end in an openend spinning unit according to claim 7, wherein a blowing means is arranged in opposition to said comb means for supporting said thread end against said comb means during combing thereof.
  • Apparatus for piecing a thread end in an openend spinning unit according to claim 1, wherein said comb means includes at least one rotatable carding roll and means for rotating said roll and moving said roll toward the thread end.
  • Apparatus for piecing a thread end in an openend spinning unit according to claim 18, wherein the axis of said roll extends at right angles to the longitudinal direction of said thread.
  • Apparatus for piecing a thread end in an openend spinning unit according to claim 1, wherein said comb means includes at least one comb-like element and means for displacing said comb-like element in the longitudinal direction of the thread.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US513776A 1973-10-10 1974-10-10 Apparatus for piecing a thread in an open-end spinning unit Expired - Lifetime US3924393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2350842A DE2350842C3 (de) 1973-10-10 1973-10-10 Vorrichtung zum Anspinnen eines Fadens bei einem Offenendspinnaggregat

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041684A (en) * 1975-09-18 1977-08-16 W. Schlafhorst & Co. Device for automatically joining a thread for spinning
US4083169A (en) * 1975-05-20 1978-04-11 Platt Saco Lowell Limited Open-end spinning machines
US4089155A (en) * 1975-12-06 1978-05-16 Fritz Stahlecker Open-end spinning machine with facilities and method for the simultaneous piecing of all spinning units
US4132056A (en) * 1975-12-23 1979-01-02 Schubert & Salzer Open end spinning apparatus
US4653260A (en) * 1984-05-19 1987-03-31 Peter Artzt Process and apparatus for preparing a cut-to-length thread end for the re-piecing of an open-end spinning machine
US4672802A (en) * 1984-07-25 1987-06-16 W. Schlafhorst & Co. Method and device for starting the spinning of a thread in an OE-spinning device
US5083420A (en) * 1989-06-09 1992-01-28 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Process and device to piece a yarn on an open-end spinning device
US5293738A (en) * 1990-08-01 1994-03-15 Savio S.P.A. Device for picking up and preparing the skein end for rejoining in an open-end spinning machine
US5303538A (en) * 1990-02-23 1994-04-19 Savio S.P.A. Device and procedure for preparing the thread end to start or resume open-end spinning
US5339614A (en) * 1991-07-11 1994-08-23 Maschinenfabrik Rieter Ag Rotating disc for separating and processing the end of yarn
US5566539A (en) * 1990-07-20 1996-10-22 Binder; Rolf Method and apparatus for repairing a yarn breakage in a pair of spinning units
US20100007727A1 (en) * 2003-04-10 2010-01-14 Torre-Bueno Jose De La Automated measurement of concentration and/or amount in a biological sample

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552116B1 (fr) * 1983-09-20 1985-11-15 Asa Sa Procede et dispositif pour la rattache de files de fibres comportant une ame
FR2552117A1 (fr) * 1983-09-21 1985-03-22 Asa Sa Appareil permettant d'effectuer automatiquement les operations de cavage, relance et rattache sur une machine de fabrication de files a ame

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515172A (en) * 1948-04-30 1950-07-18 Abbott Machine Co Splicing threads
US3163976A (en) * 1962-05-25 1965-01-05 Alsacienne Constr Meca Spinning device
US3425205A (en) * 1966-11-19 1969-02-04 Schubert & Salzer Maschinen Method and apparatus for strand quality control in rotary spinning chambers
US3492804A (en) * 1966-09-03 1970-02-03 Schubert & Salzer Maschinen Sensor-actuated strand clamping and strand return mechanism for spinning apparatus
US3626440A (en) * 1970-03-17 1971-12-07 Maremont Corp Yarn-piecing apparatus and method with yarn collation by vacuum
US3722198A (en) * 1970-10-07 1973-03-27 K Gotzfried Method and apparatus for spinning yarns of staple fibers and filaments

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515172A (en) * 1948-04-30 1950-07-18 Abbott Machine Co Splicing threads
US3163976A (en) * 1962-05-25 1965-01-05 Alsacienne Constr Meca Spinning device
US3492804A (en) * 1966-09-03 1970-02-03 Schubert & Salzer Maschinen Sensor-actuated strand clamping and strand return mechanism for spinning apparatus
US3425205A (en) * 1966-11-19 1969-02-04 Schubert & Salzer Maschinen Method and apparatus for strand quality control in rotary spinning chambers
US3626440A (en) * 1970-03-17 1971-12-07 Maremont Corp Yarn-piecing apparatus and method with yarn collation by vacuum
US3722198A (en) * 1970-10-07 1973-03-27 K Gotzfried Method and apparatus for spinning yarns of staple fibers and filaments

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083169A (en) * 1975-05-20 1978-04-11 Platt Saco Lowell Limited Open-end spinning machines
US4041684A (en) * 1975-09-18 1977-08-16 W. Schlafhorst & Co. Device for automatically joining a thread for spinning
US4089155A (en) * 1975-12-06 1978-05-16 Fritz Stahlecker Open-end spinning machine with facilities and method for the simultaneous piecing of all spinning units
US4132056A (en) * 1975-12-23 1979-01-02 Schubert & Salzer Open end spinning apparatus
US4653260A (en) * 1984-05-19 1987-03-31 Peter Artzt Process and apparatus for preparing a cut-to-length thread end for the re-piecing of an open-end spinning machine
US4672802A (en) * 1984-07-25 1987-06-16 W. Schlafhorst & Co. Method and device for starting the spinning of a thread in an OE-spinning device
US5083420A (en) * 1989-06-09 1992-01-28 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Process and device to piece a yarn on an open-end spinning device
US5303538A (en) * 1990-02-23 1994-04-19 Savio S.P.A. Device and procedure for preparing the thread end to start or resume open-end spinning
US5566539A (en) * 1990-07-20 1996-10-22 Binder; Rolf Method and apparatus for repairing a yarn breakage in a pair of spinning units
US5293738A (en) * 1990-08-01 1994-03-15 Savio S.P.A. Device for picking up and preparing the skein end for rejoining in an open-end spinning machine
US5339614A (en) * 1991-07-11 1994-08-23 Maschinenfabrik Rieter Ag Rotating disc for separating and processing the end of yarn
US20100007727A1 (en) * 2003-04-10 2010-01-14 Torre-Bueno Jose De La Automated measurement of concentration and/or amount in a biological sample

Also Published As

Publication number Publication date
DE2350842B2 (de) 1978-08-31
DE2350842C3 (de) 1979-04-26
JPS5064537A (de) 1975-05-31
JPS5748650B2 (de) 1982-10-18
DE2350842A1 (de) 1975-04-17

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