US3640061A - Method and apparatus for spinning a fiber band - Google Patents

Method and apparatus for spinning a fiber band Download PDF

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Publication number
US3640061A
US3640061A US867607A US3640061DA US3640061A US 3640061 A US3640061 A US 3640061A US 867607 A US867607 A US 867607A US 3640061D A US3640061D A US 3640061DA US 3640061 A US3640061 A US 3640061A
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thread
spinning
spinning chamber
face
peripheral surface
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US867607A
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Hans Landwehrkamp
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Rieter Ingolstadt Spinnereimaschinenbau AG
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Schubert und Salzer Maschinenfabrik AG
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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
    • D01H4/40—Removing running yarn from the yarn forming region, e.g. using tubes

Definitions

  • a spinning apparatus comprises a spinning chamber, a cenfi 'i trally arranged thread drawoff tube for drawing off thread l 89 5 95 from the spinning chamber, the thread drawoff tube opening [58] Field ofSearch ..57/58. 8. having a radialouter Smooth face extending into the path of 57/156 the thread and an interior annular face which is rough or notched.
  • the present invention relates to methods for the spinning of a fiber band or sliver and more particularly to such methods making use of a rotating spinning chamber from which the spun thread or yarn is drawn through a centrally arranged drawoff tube.
  • the invention also relates to an apparatus for carrying out the method.
  • One object of the present invention is therefore to provide an apparatus with whose aid a drawn-off thread is given a considerable degree of false twist and the drawoff speed can thus be increased without the simultaneous occurrence of spinning difiiculties such as breaks in the thread.
  • the thread for this purpose on its travel from the thread binding-in point on the collecting surface into the thread or yarn drawoff tube is first passed over a smooth face and then over a frictional face and is caused to abut against these faces making use of the thread tension.
  • the thread or yarn drawoff opening in accordance with the invention has a smooth outer radial face projecting into the path of the thread and a rough or notched inner annular surface.
  • the drawn off thread or yarn is given, on the one hand, a sufficient false twist by the rough or notched inner annular surface, but, on the other hand, the smooth outer radial surface extending into the path of the thread damps oscillations in the thread so that spinning difficulties as known to occur in the prior art thread draw ofi tube openings are effectively prevented.
  • FIG. 1 shows a spinning apparatus in longitudinal section with the thread or yarn outlet opening tube in accordance with the invention.
  • FIGS. 2 and 3 show further embodiments of the yarn outlet tube opening in longitudinal section.
  • the fiber material is usually supplied as a fiber band S through a supply device 5 shown in the drawing in the form of supply rollers and a fiber band supply tube 51 to the collecting surface 24, from which the fiber band is drawn off as yarn or thread F by a centrally arranged yarn drawoff part, for example a funnel serving as a separating means, or a yam drawoff tube 6, use being made of a drawofi' device 3.
  • a supply device 5 shown in the drawing in the form of supply rollers and a fiber band supply tube 51 to the collecting surface 24, from which the fiber band is drawn off as yarn or thread F by a centrally arranged yarn drawoff part, for example a funnel serving as a separating means, or a yam drawoff tube 6, use being made of a drawofi' device 3.
  • the thread drawoff tube opening end 60 therefore has, in accordance with the invention, a smooth outer radial face 600, which extends in the manner of a funnel into the tube axial passage 63, and a notched interior peripheral face 601 (FIG. 1).
  • the smooth outer radial face projects into the path of the yarn moving from the collecting surface 24 into the passage 63 so that the yarn is caused to be pressed against the faces 600 and 601 by its tension.
  • the thread has a false twist applied to it by the notched surface 601.
  • the smooth radial face 600 series to damp thread oscillations caused by contact of the thread with the notched face, so that the oscillations cannot have any objectionable effect on the operation of the collecting face 24.
  • the thread drawofi' tube 6 is made so that it can be displaced axially, for example by loosening a holding screw 602, different positions can be selected in order for the tube end surface 600 to provide a greater or lesser damping effect in accordance with the spinning conditions it is desired to achieve, the damping being changed by an alteration in the thread deflection angle on the smooth surface 600.
  • two relatively adjustable thread drawoff tubes which telescope one inside the other, as is described in U.S. Pat. No, 3,48l,l28.
  • the surface 601 can be made in various forms. It is only essential that it exerts a substantial friction on the thread F.
  • an insert 690 is provided, instead of the notches, whose interior bore conveniently widens towards the interior of the spinning chamber 2.
  • the same effect can also be obtained by providing different coating materials on the two surfaces 600 and 601 or by difference in roughness of the same material.
  • the opening of the thread or yarn drawoff tube in accordance with the invention can also be constructed in various different manners.
  • the tube opening end 60 shown in FIG. 2 has a cylindrical bore 632 adjacent to the tube axial bore 63 which bases are connected by a rough annular surface 601 at the end of the tube axial base adjacent to the interior of the spinning chamber.
  • the enlarged cylindrical bore portion632 of the tube axial bore 63 has a broad radial end face 600 like a plate.
  • the thread drawofi' tube 6 is arranged in the cover 11 or in the hollow shaft 21 of the spinning chamber 2. It is also possible, instead of the stationary thread outlet tube 6 shown, to use a rotary one, which rotates in synchronism with the rotation of the spinning chamber 2 or independently of it.
  • the method of twisting the thread by tensioning and drawing the thread over a frictional face comprises the steps of drawing the tensioned thread over a smooth face between the thread binding-in point of the spinning chamber and the frictional face, and during such drawing of the thread over such smooth face tensioning the thread for pressing it against such smooth face.
  • a spinning apparatus including a spinning chamber having a binding-in point and a single centrally arranged thread drawoff tube for drawing off thread from the spinning chamber having an inner end projecting into the spinning chamber
  • the improvement comprising the drawoff tube having a mouth flared toward the spinning chamber including an interior peripheral surface which is rough and a smooth peripheral face at the side of the rough peripheral surface toward the end of the drawofi tube, of greater circumferential extent than the circumferential extent of the rough peripheral surface and located inwardly from a conical reference shape joining the rough peripheral surface and the binding-in point of the spinnning chamber, whereby a thread in passing from the binding-in point of the spinning chamber to said rough peripheral surface will be drawn over and pressed against said smooth face.

Abstract

A spinning apparatus comprises a spinning chamber, a centrally arranged thread drawoff tube for drawing off thread from the spinning chamber, the thread drawoff tube opening having a radial outer smooth face extending into the path of the thread and an interior annular face which is rough or notched.

Description

Q Unlted States Patent 11 1 3,640,061 Landwehrkamp 1 Feb. 8, 1972 [54] METHOD AND APPARATUS FOR R f nces Cit d SPINNING A FIBER BAND UNITED ATES PATENTS 3,210,923 10/1965 Schlosser ..57/58.95 m] Invent Ingdstadt Ger 3,367,099 2/1968 Kubovy et a1 57/58.89 y 3,411,283 11/1968 lsomura ..57/58.89 [73] Assignee: Schubert 8; Salzer Maschinenfabrik Ak- 3,447,298 6/1969 Collins ..57/58.89 tiengesellschaft, Ingolstadt, Germany 3,455,095 7/1969 Makeham et a1 57/58.89 X 3,481,128 12/1969 Landwehrkamp et al... .....57/58.89 I 1 Flled= Oct 20,1969 3,481,129 12/1969 Shepherd et a1... .,...57/58.89 I21 I App No 867 607 3,520,122 7/1970 Shepherd ..57/58.89
Primary Examiner'Dona1d E. Watkins 311| Foreign Application Pr1ority Data AtwmeyR9bert Beach Oct. 30, 1968 Germany ..P 18 06 054.3 57 ABSTRACT A spinning apparatus comprises a spinning chamber, a cenfi 'i trally arranged thread drawoff tube for drawing off thread l 89 5 95 from the spinning chamber, the thread drawoff tube opening [58] Field ofSearch ..57/58. 8. having a radialouter Smooth face extending into the path of 57/156 the thread and an interior annular face which is rough or notched.
3 Claims, 3 Drawing Figures E f j 24 2 PATENTED FEB 81972 fmww METHOD AND APPARATUS FOR SPINNING A FIBER BAND PRIOR ART The present invention relates to methods for the spinning of a fiber band or sliver and more particularly to such methods making use of a rotating spinning chamber from which the spun thread or yarn is drawn through a centrally arranged drawoff tube. The invention also relates to an apparatus for carrying out the method.
In the case of fiber band spinning devices using a rotating spinning chamber it is known that the false twisting of the end of the thread in the spinning chamber has a substantial infiuence on thread formation and the quality of the thread. This false twist and the associated movement of twist along the thread from the piece of thread in the thread outlet tube to the fiber-collecting surface can be influenced in various manners, for instance by stationary or rotating thread outlet tubes (German Pat. No. 489,538), funnels (French Pat. No. 1,419,233)
or bodies of rotation (English Pat. No. 477,259 and German Pat. No. 1,178,336). The U.S. Pat. No. 3,210,923 describes the provision of the outlet edge, over which the thread is drawn from the spinning chamber, with radial grooves or notches in order to improve transmission of the twist along the thread.
It has, however, been found that the thread binding-in point in the case of this apparatus has the tendency to change over from the original direction of rotation in the direction of the rotation of the spinning chamber into an opposite rotary movement. As a consequence an extremely weak yarn or thread is produced which often breaks.
As tests have shown, this tendency is less if instead of a notched outlet edge of the thread outlet tube use is made of an opening with .a smooth surface. However, in this case the transmission of twist is worse, so that the thread drawoff speed must be reduced.
SUMMARY OF THE INVENTION One object of the present invention is therefore to provide an apparatus with whose aid a drawn-off thread is given a considerable degree of false twist and the drawoff speed can thus be increased without the simultaneous occurrence of spinning difiiculties such as breaks in the thread.
In accordance with the invention the thread for this purpose on its travel from the thread binding-in point on the collecting surface into the thread or yarn drawoff tube is first passed over a smooth face and then over a frictional face and is caused to abut against these faces making use of the thread tension.
For carrying out this method the thread or yarn drawoff opening in accordance with the invention has a smooth outer radial face projecting into the path of the thread and a rough or notched inner annular surface.
Although the U.S. Pat. No.3,2l0,923 describes a thread drawofi' tube opening provided with internal grooves or ribs while having a smooth outer surface, this smooth radial face does not extend into the path of the thread but only serves for closing the spinning chamber, that is to say as a separating means, in order to hold the fed-in fibers free of the thread formed. Thus, in the case of this arrangement as well, the disadvantages of known thread or yarn drawoff tube openings cannot be avoided.
With the construction of the thread drawoff tube opening in accordance with the invention the drawn off thread or yarn is given, on the one hand, a sufficient false twist by the rough or notched inner annular surface, but, on the other hand, the smooth outer radial surface extending into the path of the thread damps oscillations in the thread so that spinning difficulties as known to occur in the prior art thread draw ofi tube openings are effectively prevented.
BRIEF DESCRIPTION OF THE VIEW OF THE DRAWING Further details of the fiber band spinning device in accordance with the invention are now described in more detail with reference to the accompanying drawings.
FIG. 1 shows a spinning apparatus in longitudinal section with the thread or yarn outlet opening tube in accordance with the invention.
FIGS. 2 and 3 show further embodiments of the yarn outlet tube opening in longitudinal section.
DETAILED DESCRIPTION In the fiber band or sliver device with a rotating spinning chamber 2 and a housing 1, with a lid 11, surrounding the spinning chamber, the fiber material is usually supplied as a fiber band S through a supply device 5 shown in the drawing in the form of supply rollers and a fiber band supply tube 51 to the collecting surface 24, from which the fiber band is drawn off as yarn or thread F by a centrally arranged yarn drawoff part, for example a funnel serving as a separating means, or a yam drawoff tube 6, use being made of a drawofi' device 3.
In the previously known methods the thread or yarn on its path from the collecting surface 24 to the thread drawoff tube was only passed over a single face, on which it was caused to abut making use of the thread tension.
It has been found that such a surface, when constructed as a frictional surface, brings about a frequent reversal in the direction of rotation of the thread binding-in point E. If, however, this surface is smooth, the movement of twist along the thread is worse so that the thread drawoff speed must be reduced.
As has been shown by tests, these spinning difficulties can be avoided by causing the thread to pass during its movement firstly over a smooth face and then over a frictional face, the thread being caused to abut againstthese faces by making use of the thread tension.
The thread drawoff tube opening end 60 therefore has, in accordance with the invention, a smooth outer radial face 600, which extends in the manner of a funnel into the tube axial passage 63, and a notched interior peripheral face 601 (FIG. 1). The smooth outer radial face projects into the path of the yarn moving from the collecting surface 24 into the passage 63 so that the yarn is caused to be pressed against the faces 600 and 601 by its tension. 1
In this manner the thread has a false twist applied to it by the notched surface 601. The smooth radial face 600, however, series to damp thread oscillations caused by contact of the thread with the notched face, so that the oscillations cannot have any objectionable effect on the operation of the collecting face 24.
If the thread drawofi' tube 6 is made so that it can be displaced axially, for example by loosening a holding screw 602, different positions can be selected in order for the tube end surface 600 to provide a greater or lesser damping effect in accordance with the spinning conditions it is desired to achieve, the damping being changed by an alteration in the thread deflection angle on the smooth surface 600. For this purpose it is possible to provide two relatively adjustable thread drawoff tubes which telescope one inside the other, as is described in U.S. Pat. No, 3,48l,l28.
The surface 601 can be made in various forms. It is only essential that it exerts a substantial friction on the thread F. Thus, for example, in accordance with FIG. 2, an insert 690 is provided, instead of the notches, whose interior bore conveniently widens towards the interior of the spinning chamber 2. The same effect can also be obtained by providing different coating materials on the two surfaces 600 and 601 or by difference in roughness of the same material.
The opening of the thread or yarn drawoff tube in accordance with the invention can also be constructed in various different manners. The tube opening end 60 shown in FIG. 2 has a cylindrical bore 632 adjacent to the tube axial bore 63 which bases are connected by a rough annular surface 601 at the end of the tube axial base adjacent to the interior of the spinning chamber. The enlarged cylindrical bore portion632 of the tube axial bore 63 has a broad radial end face 600 like a plate.
For the invention it is of little importance whether the thread drawofi' tube 6 is arranged in the cover 11 or in the hollow shaft 21 of the spinning chamber 2. It is also possible, instead of the stationary thread outlet tube 6 shown, to use a rotary one, which rotates in synchronism with the rotation of the spinning chamber 2 or independently of it.
The combination in accordance with the invention of a smooth contact face 600 with a contact face 601 having a relatively high coefficient of friction achieves a sutficient false twist for obtaining high drawoff speeds while avoiding the change in the direction of rotation of the thread binding-in point B and associated faults in the quality of the yarn together with a large number of yarn breakages.
What I claim is:
1. In spinning a fiber band using a rotating spinning chamber from which the spun thread is drawn off from a thread binding-in point on a rotating collecting surface of the spinning chamber into and through a centrally arranged thread drawofi' tube, the method of twisting the thread by tensioning and drawing the thread over a frictional face, wherein the improvement comprises the steps of drawing the tensioned thread over a smooth face between the thread binding-in point of the spinning chamber and the frictional face, and during such drawing of the thread over such smooth face tensioning the thread for pressing it against such smooth face.
2. In a spinning apparatus including a spinning chamber having a binding-in point and a single centrally arranged thread drawoff tube for drawing off thread from the spinning chamber having an inner end projecting into the spinning chamber, the improvement comprising the drawoff tube having a mouth flared toward the spinning chamber including an interior peripheral surface which is rough and a smooth peripheral face at the side of the rough peripheral surface toward the end of the drawofi tube, of greater circumferential extent than the circumferential extent of the rough peripheral surface and located inwardly from a conical reference shape joining the rough peripheral surface and the binding-in point of the spinnning chamber, whereby a thread in passing from the binding-in point of the spinning chamber to said rough peripheral surface will be drawn over and pressed against said smooth face.
3. In the spinning apparatus defined in claim 2, the thread drawoff tube interior peripheral surface being roughened by being notched.

Claims (3)

1. In spinning a fiber band using a rotating spinning chamber from which the spun thread is drawn off from a thread binding-in point on a rotating collecting surface of the spinning chamber into and through a centrally arranged thread drawoff tube, the method of twisting the thread by tensioning and drawing the thread over a frictional face, wherein the improvement comprises the steps of drawing the tensioned thread over a smooth face between the thread binding-in point of the spinning chamber and the frictional face, and during such drawing of the thread over such smooth face tensioning the thread for pressing it against such smooth face.
2. In a spinning apparatus including a spinning chamber having a binding-in point and a single centrally arranged thread drawoff tube for drawing off thread from the spinning chamber having an inner end projecting into the spinning chamber, the improvement comprising the drawoff tube having a mouth flared toward the spinning chamber including an interior peripheral surface which is rough and a smooth peripheral face at the side of the rough peripheral surface toward the end of the drawoff tube, of greater circumferential extent than the circumferential extent of the rough peripheral surface and located inwardly from a conical reference shape joining the rough peripheral surface and the binding-in point of the spinnning chamber, whereby a thread in passing from the binding-in point of the spinning chamber to said rough peripheral surface will be drawn over and pressed against said smooth face.
3. In the spinning apparatus defined in claim 2, the thread drawoff tube interior peripheral surface being roughened by being notched.
US867607A 1968-10-30 1969-10-20 Method and apparatus for spinning a fiber band Expired - Lifetime US3640061A (en)

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3778989A (en) * 1971-06-21 1973-12-18 Skf Kugellagerfabriken Gmbh Apparatus for withdrawing thread
US3789597A (en) * 1971-06-21 1974-02-05 Skf Kugellagerfabriken Gmbh Apparatus for the spindleless spinning of textile fibers
US3822541A (en) * 1972-01-14 1974-07-09 Platt International Ltd Open end spinning apparatus
US3844100A (en) * 1971-10-19 1974-10-29 Platt International Ltd Apparatus for the open-end spinning of textile yarns
US3965661A (en) * 1973-04-21 1976-06-29 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Thread drawoff tube for an open-end spinning unit
US3986332A (en) * 1975-05-21 1976-10-19 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Thread-draw-off guide attached to a spinning rotor of an open-end spinning unit
US4011712A (en) * 1974-09-21 1977-03-15 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Thread drawoff tube for open-end spinning machines
US4110961A (en) * 1976-10-19 1978-09-05 Vyzkumny Ustav Bavlnarsky Spinning unit of an open-end spinning machine
US4166354A (en) * 1976-10-14 1979-09-04 Societe Alsacienne De Constructions Mecaniques De Mulhouse Freed-fiber spinning devices
US4385488A (en) * 1980-03-29 1983-05-31 W. Schlafhorst & Co. Open-end spinning device
US4702069A (en) * 1987-03-09 1987-10-27 Vsesojuzny Nauchnoissledovatelsky Institut Legkogo I Tekstilnogo Mashinostroenia Open-end spinning device
US4773211A (en) * 1986-03-19 1988-09-27 W. Schlafhorst & Co. Arrangement for open-end spinning
US5265406A (en) * 1990-03-09 1993-11-30 Schubert & Salzer Maschinenfabrik Ag Open-end spinning device
WO1994004730A1 (en) * 1992-08-20 1994-03-03 Burckhardt America Inc. Open end spinning device
US5321943A (en) * 1991-06-12 1994-06-21 Spindelfabrik Suessen, Schurr, Stahlecker & Grill Gmbh Yarn withdrawal nozzle for open-end spinning arrangements
CN102296395A (en) * 2010-06-25 2011-12-28 立达英格尔斯塔特有限公司 Thread draw-off nozzle
US10767284B2 (en) * 2015-11-06 2020-09-08 Maschinenfabrik Rieter Ag Thread draw-off nozzle having notches extending radially to the nozzle bore

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220402C2 (en) * 1982-05-29 1985-03-21 W. Schlafhorst & Co, 4050 Mönchengladbach Method and device for producing a yarn spun with an OE rotor spinning machine
GB2128643B (en) * 1982-10-23 1986-01-08 Elitex Zavody Textilniho Open-end spinning thread guides
IN166985B (en) * 1985-04-29 1990-08-18 Rieter Ag Maschf

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US3210923A (en) * 1960-07-28 1965-10-12 Spinnbau Ges G M B H Device for spinning staple fibers
US3367099A (en) * 1966-03-05 1968-02-06 Vyzk Ustav Bavinarsky Sealing arrangement for a spinning apparatus
US3411283A (en) * 1966-03-31 1968-11-19 Toyoda Automatic Loom Works In Spinning apparatus utilizing airstream
US3447298A (en) * 1967-01-31 1969-06-03 Maremont Corp Turbine spinning apparatus
US3455095A (en) * 1967-09-26 1969-07-15 Tmm Research Ltd Spinning of textile yarns
US3481128A (en) * 1966-08-24 1969-12-02 Schubert & Salzer Maschinen Apparatus for varying spinning characteristics of a rotary chamber spinning machine
US3481129A (en) * 1966-11-08 1969-12-02 Tmm Research Ltd Open end spinning apparatus
US3520122A (en) * 1966-09-12 1970-07-14 Tmm Research Ltd Spinning of textile yarns

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3210923A (en) * 1960-07-28 1965-10-12 Spinnbau Ges G M B H Device for spinning staple fibers
US3367099A (en) * 1966-03-05 1968-02-06 Vyzk Ustav Bavinarsky Sealing arrangement for a spinning apparatus
US3411283A (en) * 1966-03-31 1968-11-19 Toyoda Automatic Loom Works In Spinning apparatus utilizing airstream
US3481128A (en) * 1966-08-24 1969-12-02 Schubert & Salzer Maschinen Apparatus for varying spinning characteristics of a rotary chamber spinning machine
US3520122A (en) * 1966-09-12 1970-07-14 Tmm Research Ltd Spinning of textile yarns
US3481129A (en) * 1966-11-08 1969-12-02 Tmm Research Ltd Open end spinning apparatus
US3447298A (en) * 1967-01-31 1969-06-03 Maremont Corp Turbine spinning apparatus
US3455095A (en) * 1967-09-26 1969-07-15 Tmm Research Ltd Spinning of textile yarns

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3789597A (en) * 1971-06-21 1974-02-05 Skf Kugellagerfabriken Gmbh Apparatus for the spindleless spinning of textile fibers
US3778989A (en) * 1971-06-21 1973-12-18 Skf Kugellagerfabriken Gmbh Apparatus for withdrawing thread
US3844100A (en) * 1971-10-19 1974-10-29 Platt International Ltd Apparatus for the open-end spinning of textile yarns
US3822541A (en) * 1972-01-14 1974-07-09 Platt International Ltd Open end spinning apparatus
US3965661A (en) * 1973-04-21 1976-06-29 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Thread drawoff tube for an open-end spinning unit
US4011712A (en) * 1974-09-21 1977-03-15 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Thread drawoff tube for open-end spinning machines
US3986332A (en) * 1975-05-21 1976-10-19 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Thread-draw-off guide attached to a spinning rotor of an open-end spinning unit
US4166354A (en) * 1976-10-14 1979-09-04 Societe Alsacienne De Constructions Mecaniques De Mulhouse Freed-fiber spinning devices
US4110961A (en) * 1976-10-19 1978-09-05 Vyzkumny Ustav Bavlnarsky Spinning unit of an open-end spinning machine
US4385488A (en) * 1980-03-29 1983-05-31 W. Schlafhorst & Co. Open-end spinning device
US4773211A (en) * 1986-03-19 1988-09-27 W. Schlafhorst & Co. Arrangement for open-end spinning
US4702069A (en) * 1987-03-09 1987-10-27 Vsesojuzny Nauchnoissledovatelsky Institut Legkogo I Tekstilnogo Mashinostroenia Open-end spinning device
US5265406A (en) * 1990-03-09 1993-11-30 Schubert & Salzer Maschinenfabrik Ag Open-end spinning device
US5321943A (en) * 1991-06-12 1994-06-21 Spindelfabrik Suessen, Schurr, Stahlecker & Grill Gmbh Yarn withdrawal nozzle for open-end spinning arrangements
WO1994004730A1 (en) * 1992-08-20 1994-03-03 Burckhardt America Inc. Open end spinning device
US5437147A (en) * 1992-08-20 1995-08-01 Burckhardt America, Inc. Open end spinning device
US5475974A (en) * 1992-08-20 1995-12-19 Burckhardt America, Inc. Open end spinning device
CN102296395A (en) * 2010-06-25 2011-12-28 立达英格尔斯塔特有限公司 Thread draw-off nozzle
US8347597B2 (en) 2010-06-25 2013-01-08 Rieter Ingolstadt Gmbh Thread draw-off nozzle
CN102296395B (en) * 2010-06-25 2016-05-25 立达英格尔斯塔特有限公司 Thread draw-off nozzle
US10767284B2 (en) * 2015-11-06 2020-09-08 Maschinenfabrik Rieter Ag Thread draw-off nozzle having notches extending radially to the nozzle bore

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DE1806054A1 (en) 1970-10-08
FR2021891A1 (en) 1970-07-24
CH496115A (en) 1970-09-15
GB1239330A (en) 1971-07-14

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