EP1347084B1 - Dispositif de filature à jet d'air avec élément de canalisation - Google Patents

Dispositif de filature à jet d'air avec élément de canalisation Download PDF

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Publication number
EP1347084B1
EP1347084B1 EP03006016A EP03006016A EP1347084B1 EP 1347084 B1 EP1347084 B1 EP 1347084B1 EP 03006016 A EP03006016 A EP 03006016A EP 03006016 A EP03006016 A EP 03006016A EP 1347084 B1 EP1347084 B1 EP 1347084B1
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EP
European Patent Office
Prior art keywords
fibre
exhibits
fiber
eddy chamber
jet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03006016A
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German (de)
English (en)
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EP1347084A1 (fr
Inventor
Herbert Dr. Stalder
Olivier Wüst
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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Filing date
Publication date
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Publication of EP1347084A1 publication Critical patent/EP1347084A1/fr
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means

Definitions

  • the present invention relates to an apparatus for producing a spun yarn from a staple fiber composite according to the preamble of claim 1.
  • Such devices are known in the textile industry and are used for air spinning.
  • Such a device discloses, for example, the document EP 854 214 (equivalent to US Pat. No. 5,927,062), which is shown in FIG. It can be seen how a staple fiber strand 1 is supplied by an outlet roller pair 2 (usually a drafting system) and passes through a fiber guide element 3.1.
  • the fiber guiding element 3.1 has a fiber conveying channel 4 with a helical fiber guiding surface 5.
  • the staple fiber strand 1 is passed through the fiber guide surface 5, which ends at a fiber discharge edge 6.
  • a spindle 7 with a Garn arrangementskanal 8 and the Garn Entryskanal 8 associated inlet port 9 is provided.
  • a fluid device for generating a vortex flow around the inlet port 9 is provided (fluid device not shown).
  • the fluid device generates a vortex flow 11 around the inlet mouth 9, or about the spindle 7 in the space 14.
  • the figure 1 shows the air spinning device only schematically.
  • the space 14 is normally closed by a housing and can therefore be referred to as a vortex chamber (14.1, see the following figures).
  • As the fluid compressed air is usually used.
  • the free fiber ends 12 of the staple fiber structure 1 surround the inlet mouth 9.
  • the movement of the fiber structure 1 in the direction of the arrow produces a relative rotating movement of the free fiber ends 12 around the inlet mouth 9 and thereby around the fiber structure 1 Staple fiber strand 1 thus creates a spun yarn 10th
  • the present invention is concerned with the guidance of the fluid (air) flowing out of the fluid device. It deals in particular with the area of the vortex chamber 14.1 in the immediate vicinity of the outlet openings for the fluid.
  • FIG. 2 Another prior art, according to the Japanese publication JP 3-10 63 68, show the figures 2 and 2a.
  • FIG. 2 substantially the same components as in FIG. 1 are shown (with a change, see FIG. 2a).
  • the outlet roller pair 2 and the spindle 7 with the Garn Adjustskanal 8 can be seen.
  • a fluid device also generates a turbulent flow here.
  • the fluid device consists of a plurality of jet nozzles 13.1.
  • the jet nozzles consist of generally cylindrical bores from which a fluid (preferably air) is pressed under pressure into the vortex chamber 14.1.
  • the vortex chamber 14.1 has a circular cross-section.
  • the fiber guide element 3.1 includes a sheath 3a, which also forms the fiber conveying channel 4.
  • a vortex chamber housing 15 connects.
  • the fluid device represented by the bores or jet nozzles 13.1 is integrated in the sheathing of the fiber guiding element 3a.
  • the vortex chamber housing 15 and the sheathing of the fiber guide element 3a are two separate components. However, it is quite possible and known from the prior art, both components as an element to construct (in one piece). Whether these elements are constructed in one piece or as separate components is irrelevant to the present application.
  • FIG. 2a the fiber guiding element 3.1 of FIG. 2 is shown in a three-dimensional view.
  • the fiber guide element 3.1 Figure 2 no helical, but a flat fiber guide surface 16.
  • Another difference from Figure 1 lies in the absence of a fiber delivery edge. Instead of the fiber delivery edge, the fiber guide element part 3b has a blunt cone. The purpose of this cone 16 is to produce a so-called false twine core.
  • twist stop This is intended to prevent a false twist (twisting of the staple fiber strand) from the inlet mouth 9 being propagated backwards through the fiber guide element 3.1 up to the nip of the pair of delivery rollers 2 (so-called twist stop).
  • a false twist prevents a true turning or twisting of the free fiber ends 12 around the (untwisted) yarn core.
  • the core of the staple fiber strand rotates with the free fiber ends 12 and prevents spinning of the fibers.
  • the twist stop is realized by the helical fiber guide surface 5, which is intended to make it impossible to twist the staple fiber strand 1 against the outlet rollers 2.
  • Object of the present invention is to improve the flow conditions in the swirl chamber and thus the yarn values of the yarn produced.
  • the area of the vortex chamber should be fluidly improved in the immediate vicinity of the outlet openings of the jet nozzles.
  • the swirl chamber adjacent end face of the fiber guide element can also be designed such that it serves as a guide surface for the turbulent flow.
  • the end face can be designed such that it does not disturb the vortex flow at least (in that the end face has a greater inclination than the flow direction of the exiting fluid). In both cases, the adaptation of the end face also improves the effect according to the invention.
  • the increased air flow or the air throughput (amount per unit time) through the fiber conveying channel, the fiber guide between the outlet rollers and the entrance of the fiber conveying channel is improved.
  • the increased air flow through the fiber conveying channel "draws" the continuous bandage of loose staple fibers more intensively into the fiber conveying channel.
  • the individual fibers in the staple fiber strand are better aligned by this flow, and the staple fiber strand is less prone to "flapping" (caused by the air flow around the rotating discharge rolls) before entering the fiber feed channel.
  • the number of production interruptions, caused by breaks of the staple fiber association immediately after the outlet rollers, could be reduced by the inventive embodiments. Likewise a measurable improvement of the yarn quality could be determined.
  • FIG. 3 shows a first embodiment of the invention.
  • the inventive mode of action will be explained with reference to this figure something.
  • a fiber guide element 3 can be seen, which is surrounded by a hollow cylindrical tunnel lining 17.
  • the tunnel lining 17 may be in one piece or in several pieces, preferably in two pieces.
  • the fiber conveying channel 4 is encased by the tunnel lining 17.
  • the tunnel lining 17 is shaped in such a way that a shoulder 18 for the swirl chamber housing 15 is formed at the end of the fiber conveying channel 4.
  • the end face of the shoulder 18 serves as a guide surface for the fluid emerging from the jet nozzles 13.1 (not shown).
  • the outlet openings of the jet nozzles for the fluid (normally air) in the vortex chamber 14.1 have an elliptical shape (see Figure 3).
  • the fiber guide element 3 and the associated tunnel lining 17 is installed in the swirl chamber housing 15.
  • the vortex chamber housing 15 does not necessarily include the fiber guide element 3 and its tunnel lining 17.
  • the two last-mentioned elements can also have their own housing which adjoins the swirl chamber housing 15 (see, for example, FIG. 7).
  • FIG. 3 also shows the spindle 7 with its yarn guide channel 8.
  • FIG. 3 a shows the cross section 3 according to the section II. In this cross section, it can be seen that the device has four individual jet nozzles 13.1.
  • FIG. 3 also clearly shows how the jet nozzles 13.1 have an inclination ⁇ to the fiber transport direction (material flow direction 19).
  • the inclination angle ⁇ may have an amount of 45 ° to 88 °, but the inclination angle ⁇ is preferably 70 ° to the material flow direction 19.
  • the inclination angle of the end face of the heel 18 to the material flow direction in this first embodiment also has the same amount (shown are 70 ° ).
  • FIG. 3 b shows a section of this first variant according to the invention according to the section lines II-II.
  • the end face 20 of the fiber guide element 3 in the swivel clamp is aligned with the end face of the shoulder 18.
  • the bores 13. 1 are arranged rotationally symmetrically.
  • FIG. 3 c shows a plan view of the fiber guiding element 3. It is clearly recognizable that the end face 20 of the fiber guiding element 3 adjoining the turbulence chamber has a conical surface. The conical end face 20 is cut off by a surface which forms the fiber delivery edge 6. From this figure, it can be clearly seen that the end face 20 can have a corresponding effect on the flow in the vortex chamber by appropriate design.
  • the end face 20 therefore preferably has the same or a greater inclination to the material flow direction than the direction of flow of the exiting air (or fluids). As a result, the end face 20 can also serve as a guide surface for the exiting fluid or at least (with a greater or even vertical inclination) have no disturbing effect on the turbulent flow.
  • a half shell of the tunnel lining 17.1 is shown in the view.
  • the tunnel lining may be in one piece or, as here shown, consist of two half-shells (upper half-shell not shown).
  • the end face of the shoulder 18 and the end face 20 have the same inclination, so that both surfaces are aligned.
  • the end face 20 may also have a different (greater or smaller) inclination than the face 18.
  • FIG. 4 shows an embodiment in which the end face 21 of the fiber guiding element 3 has a larger, i.e. has steeper inclination to the material flow direction 19 than the flow direction of the fluid (has inclination ⁇ ).
  • the surface 21 has a larger (steeper) inclination angle to the material flow direction 19 than the holes of the jet nozzles 13.1.
  • the surface 21 is flat and not cone-shaped. The steeper angle of the face 21 causes that surface to have a different effect on the swirling flow. Depending on the application, it may prove advantageous to choose this variant of the end face or another angle of inclination.
  • the surface of the end face 21 of the fiber guide element 3 in the vortex chamber is also not conical. This is particularly apparent from the figure 4a, which shows a section along the section line I-I of Figure 4.
  • FIG. 5 shows a further embodiment of the invention.
  • the device in Figure 5 differs from the preceding devices in the fiber guide element 22.
  • the end face 20 of the fiber guide element 22 in the swirl chamber on the same slope as the jet nozzles 13.1 (inclination ⁇ ).
  • the end face of the shoulder 18 has the same inclination, so that the surfaces 18 and 20 form an aligned, conical surface.
  • they also have the same inclination as the jet nozzles.
  • variants are also conceivable in which (in contrast to FIG. 4) the end face of the fiber guiding element in the swirling chamber has a smaller inclination than the shoulder 18 (not shown in the figures).
  • the fiber guide element 22 of Figure 5 has a deflection point 23.
  • the deflection point 23 is formed as an edge; but it can also find other types of deflection application.
  • the remaining elements of the figure correspond to the preceding description, which is why will not be discussed here in detail.
  • the mode of action of the deflection point 23 will be explained in the following FIG. Experiments have shown that, in addition to the use of the paragraph 18 as a guide surface for the air and the adaptation of the end face 20, even with the use of a deflection point 23 particularly good results in terms of yarn quality can be achieved.
  • Figure 6 tries to explain the operation of the deflection point 23 something. A more detailed explanation of the operation of such deflection can be found in the date of this application yet unpublished patent application of the applicant CH 0235/02.
  • the fiber guide element 22 with deflecting leads a staple fiber strand 24 with a flat arrangement of the fibers in the direction of the spindle 7.
  • the effect of the deflection point 23 is:
  • the free fiber ends 25 of the fibers in the staple fiber 24 can stand (shown by way of example). It can be seen that the free fiber ends 25 include both front and rear fiber ends (corresponding left or right of the deflection point 23).
  • the staple fiber structure 24 has more free fiber ends on or on the surface of the staple fiber strand 24 after passing through the deflection point 23.
  • the deflection point thus increases the number of free fiber ends on or in the immediate vicinity of the surface of the staple fiber strand.
  • These free fiber ends can thus be better detected by the turbulence 11 (or more free fiber ends are detected) and placed around the inlet port 9. In this way, more free fiber ends spun, or more so-called.
  • Umwindemaschinen be generated, which improves the spinning process and the quality itself.
  • the spun yarn 10 thus has a higher proportion of Umwindemaschinen and therefore a higher strength, than yarns of spinning devices without deflection.
  • FIG. 7 has a tunnel lining 26, which is shaped in such a way that the shoulder 29 with an inclination angle ⁇ is formed at the end of the fiber conveying channel 4.
  • the tunnel lining 26 has a thickness a which is in a range of 0.1 to 3 mm.
  • the thickness a of the tunnel lining is preferably 0.5 mm. It can be seen how in the immediate vicinity of the front side of the shoulder 29 in the swirl chamber housing 15, the bore of the jet nozzle 13.1 is arranged.
  • the shoulder 29 is arranged so close to the opening of the jet nozzle 13.1, that its end face serves as a guide surface for the exiting flow. In the figure it can be seen how the shoulder 29 is arranged in alignment with the bore.
  • the bore is also arranged in alignment with the inner surface or lateral surface of the vortex chamber 14.1, so that the bore 13.1 "tangentially aligned" enters the inside of the vortex chamber housing 15, or tangentially into the vortex chamber 14.1.
  • the jet nozzle 13.1 can have an angle of inclination ⁇ to the material flow direction (see preceding figures).
  • the inclination ⁇ of the jet nozzle to the material flow direction may be in a range of 45 ° to 88 °, preferably in a range of 58 ° to 75 °, but are preferred inclinations to the material flow direction of ⁇ equal to 60 ° or 70 ° (based on the angle ⁇ of the preceding figures).
  • the inclination angle ⁇ of the front side of the shoulder 29 may have a different amount than the inclination angle ⁇ .
  • the most suitable angle of inclination ⁇ can best be determined empirically for the specific application. Experiments have shown that in most cases an angle of inclination ⁇ is suitable is, which has the same amount as the angle ⁇ . However, the invention also provides for the use of different angles.
  • the tunnel lining 27 has a shoulder 30 with an end face, which even has an angle of inclination of 90 °.
  • the front side of the shoulder can also be in alignment if the angle of inclination is not 90 ° (see, for example, FIG. 7).
  • the fact that the bores of the jet nozzles can also be at a distance from the shoulder of the tunnel lining is shown, for example, in FIG. 7 a.
  • the tunnel lining 28 has in FIG. 7a a shoulder 31 which (measured from the foot of the shoulder) has a distance d from the geometric center of the bore 13.1.
  • the heel can therefore be arranged flush with a corresponding inclination angle or at a corresponding distance from the outlet opening of the bores 13.1. Which is the cheapest option is empirically determined in the specific application (eg depending on the type of yarn or quality to be produced).
  • the goal is in any case to use the shoulder or the end face of the fiber guide element as a guide surface and thus to achieve optimum flow conditions or vortex flows for yarn formation.
  • the deliberate use of these surfaces as fins for the turbulent flow produces noticeable improvements of the spinning process.
  • prior art devices are known which include heel chambers with shoulders (see, for example, Figure 2), it has heretofore been unknown to conceive such heels as baffles. Such known from the prior art paragraphs were previously contained in the vortex chambers production technology or had at least never held the inventive function.
  • FIG. 8 and 8 a show preferred arrangements of the jet nozzles.
  • the two figures correspond to the cross section I-I from FIG. 3, with a correspondingly adapted bore arrangement (in comparison to the arrangement of FIG. 3).
  • the vortex chamber housing has a circular inner surface and the bore of each jet nozzle "tangentially aligned" runs in the inner surface of the vortex chamber housing.
  • the inventive concept can also be implemented in devices in which the holes are not tangent in the cross-section of the vortex chamber housing.
  • Figures 8 and 8 a show therefore only preferred embodiments for the implementation of the invention.
  • FIG. 8 shows a variant in which the longitudinal axis of the bore 33 of the one jet nozzle runs parallel to the fiber guiding surface 16.
  • the fluid device in the vortex chamber housing a total of three or preferably four rotationally symmetrically arranged jet nozzles 13.1.
  • the figure 8 a shows four rotationally symmetrically arranged jet nozzles.
  • the holes are arranged rotated about the longitudinal axis of the device (compare with Figure 8).
  • the bore 33 of a jet nozzle can also be arranged such that its longitudinal axis 35 pierces the lateral surface of the vortex chamber in the zenith 34.
  • the bore 33 of a jet nozzle may also be arranged in a region between the two latter positions.
  • a plurality of jet nozzles are used, which are arranged or distributed rotationally symmetrically about the longitudinal axis of the device (see Figures 8 or 8 a).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Claims (11)

  1. Dispositif de fabrication d'un fil filé à partir d'un assemblage de fibres discontinues, contenant un élément de guidage de fibres, un canal de transport de fibres, un boîtier de chambre à tourbillon suivant l'élément de guidage de fibres, l'élément de guidage de fibres présentant une face frontale qui est adjacente à la chambre à tourbillon formée, le boîtier de chambre à tourbillon contenant une broche avec un canal de guidage de fil, le boîtier de chambre à tourbillon contenant un dispositif de fluide ayant au moins une buse à jet pour produire un écoulement tourbillonnaire autour de l'embouchure d'entrée du canal de guidage de fil,
    caractérisé en ce que
    le canal de transport de fibres (4) présente une garniture de tunnel (17, 26, 27, 28) qui est formée de telle sorte qu'il se forme à l'extrémité du canal de transport de fibres (4) un épaulement (18, 29, 30, 31) vers le boîtier de chambre à tourbillon (15), la face frontale de l'épaulement servant de face de guidage pour le fluide qui sort de la ou des buses à jet (13.1).
  2. Dispositif selon la revendication 1,
    caractérisé en ce que
    la face frontale (20, 21) de l'élément de guidage de fibres (3, 22) dans la chambre à tourbillon (14.1) présente la même inclinaison ou une plus grande inclinaison que dans le sens d'écoulement du fluide sortant du dispositif de fluide (13.1).
  3. Dispositif selon la revendication 1 ou 2,
    caractérisé en ce que
    la face frontale de l'épaulement (18) présente la même inclinaison (α) que le sens d'écoulement du fluide sortant du dispositif de fluide (13.1).
  4. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'épaulement (18, 29, 30) est disposé en affleurement avec l'embouchure de la buse à jet (13.1).
  5. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la face frontale (20, 21) de l'élément de guidage de fibres (3, 22) dans la chambre à tourbillon (14.1) et/ou l'alésage de chaque buse à jet (13.1) présente une inclinaison (α) de 45 à 88 ou de 58 à 75 degrés, de préférence de 70 degrés ou de 60 degrés par rapport à la direction du flux de matériau (19).
  6. Dispositif selon la revendication 1,
    caractérisé en ce que
    la garniture du tunnel (17, 17.1, 26, 27, 28) présente une épaisseur (a) de 0,1 à 3 mm, de préférence de 0,5 mm.
  7. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la distance (d) entre l'épaulement (31) et le centre de l'alésage de la buse à jet (13.1) ou des buses à jet est de 0,9 mm à 1,3 mm, de préférence de 1,1 mm.
  8. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le boîtier de chambre à tourbillon (15) présente une surface interne ronde circulaire et l'alésage de chaque buse à jet (13.1) se prolonge tangentiellement en affleurement par la section transversale du boîtier de chambre à tourbillon (15).
  9. Dispositif selon la revendication 8,
    caractérisé en ce que
    l'axe longitudinal (35) de l'alésage (33) d'au moins une buse à jet s'étend parallèlement à la surface de guidage des fibres (16) du canal de transport de fibres ou bien le point d'intersection géométrique entre l'axe longitudinal (35) de l'alésage (33) de l'au moins une buse à jet et la surface d'enveloppe de la chambre à tourbillon (14.1) se trouve au zénith (34) de la section transversale du boîtier de chambre de tourbillon (15), ou en ce que l'axe longitudinal (35) de l'alésage (33) de l'au moins une buse à jet se trouve dans la région entre lesdites deux positions.
  10. Dispositif selon la revendication 9,
    caractérisé en ce que
    le dispositif de fluide (13.1) présente dans le boîtier de chambre à tourbillon (15) au total 3, particulièrement de préférence 4, buses à jet (13.1) disposées avec une symétrie de révolution.
  11. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la surface de guidage de fibres (16) présente un point de déflexion (23) qui provoque une déflexion de l'assemblage de fibres discontinues (24), de préférence, le point de déflexion (23) est réalisé sous forme d'arête supplémentaire.
EP03006016A 2002-03-20 2003-03-18 Dispositif de filature à jet d'air avec élément de canalisation Expired - Lifetime EP1347084B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4852002 2002-03-20
CH4852002 2002-03-20

Publications (2)

Publication Number Publication Date
EP1347084A1 EP1347084A1 (fr) 2003-09-24
EP1347084B1 true EP1347084B1 (fr) 2006-09-06

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Country Status (6)

Country Link
US (1) US7024848B2 (fr)
EP (1) EP1347084B1 (fr)
JP (1) JP4264278B2 (fr)
CN (1) CN100543205C (fr)
AT (1) ATE338838T1 (fr)
DE (1) DE50304912D1 (fr)

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US7181547B1 (en) * 2001-06-28 2007-02-20 Fortinet, Inc. Identifying nodes in a ring network
CN1882728B (zh) * 2003-09-12 2010-09-01 里特机械公司 并条-头道粗纱联合机和用于从纤维组中制造粗纱的方法
JP2007505226A (ja) * 2003-09-12 2007-03-08 マシーネンファブリク　リーター　アクチェンゲゼルシャフト 空気精紡法によって粗紡糸を製造するための練条機・粗紡機組み合わせ体
CN1878895B (zh) * 2003-11-11 2010-09-01 里特机械公司 具有纤维引导元件的纺纱部位
EP1584715A1 (fr) * 2004-04-07 2005-10-12 Maschinenfabrik Rieter Ag Procédé pour fabriquer un fil dans un métier à filer à vortex d'air
JP2012102432A (ja) * 2010-11-10 2012-05-31 Murata Mach Ltd 空気紡績装置、紡績ユニット及び空気紡績装置を用いた紡績方法
CH706923A1 (de) * 2012-09-07 2014-03-14 Rieter Ag Maschf Spinnstelle einer Luftspinnmaschine.
DE102012108613A1 (de) * 2012-09-14 2014-03-20 Maschinenfabrik Rieter Ag Spinnstelle einer Vorspinnmaschine
CN102926054B (zh) * 2012-11-09 2015-04-22 东华大学 一种具有抽吸元件的喷气涡流纺纱装置
AU2016209295B2 (en) 2015-01-21 2021-08-12 Genevant Sciences Gmbh Methods, compositions, and systems for delivering therapeutic and diagnostic agents into cells
US11684584B2 (en) 2016-12-30 2023-06-27 Genevant Sciences Gmbh Branched peg molecules and related compositions and methods
US10995430B2 (en) * 2018-11-20 2021-05-04 Amrapur Overseas, Inc. Yarn manufacturing

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CS266666B1 (en) * 1987-04-16 1990-01-12 Havranek Zdenek Equipment for bundled yarn production in pneumatic spinning nozzle
JPH0674530B2 (ja) * 1991-07-30 1994-09-21 村田機械株式会社 紡績装置
JPH07122167B2 (ja) * 1992-03-16 1995-12-25 村田機械株式会社 紡績装置の糸継ぎ方法
JP2697575B2 (ja) * 1993-09-08 1998-01-14 村田機械株式会社 紡績装置
JP2708000B2 (ja) * 1995-02-10 1998-02-04 村田機械株式会社 紡績装置
JPH10204731A (ja) * 1997-01-16 1998-08-04 Murata Mach Ltd 紡績装置
US6782685B2 (en) * 2000-12-22 2004-08-31 Maschinenfabrik Rieter Ag Apparatus for producing a core spun yarn
US6679044B2 (en) * 2000-12-22 2004-01-20 Maschinenfabrik Rieter Ag Pneumatic spinning apparatus

Also Published As

Publication number Publication date
EP1347084A1 (fr) 2003-09-24
CN1445396A (zh) 2003-10-01
JP4264278B2 (ja) 2009-05-13
ATE338838T1 (de) 2006-09-15
JP2003286617A (ja) 2003-10-10
CN100543205C (zh) 2009-09-23
DE50304912D1 (de) 2006-10-19
US7024848B2 (en) 2006-04-11
US20040016223A1 (en) 2004-01-29

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