EP3464691A1 - Twine forming element for a pre-spinning machine and pre-spinning machine equipped therewith - Google Patents
Twine forming element for a pre-spinning machine and pre-spinning machine equipped therewithInfo
- Publication number
- EP3464691A1 EP3464691A1 EP17723523.1A EP17723523A EP3464691A1 EP 3464691 A1 EP3464691 A1 EP 3464691A1 EP 17723523 A EP17723523 A EP 17723523A EP 3464691 A1 EP3464691 A1 EP 3464691A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- garnbildungselement
- truncated cone
- roving
- face
- frusto
- 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.)
- Granted
Links
- 238000009987 spinning Methods 0.000 title claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 67
- 230000015572 biosynthetic process Effects 0.000 claims description 35
- 230000007704 transition Effects 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 239000004753 textile Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007378 ring spinning Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000003187 abdominal effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Classifications
-
- 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
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/70—Constructional features of drafting elements
- D01H5/72—Fibre-condensing guides
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H7/00—Spinning or twisting arrangements
- D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
Definitions
- a roving machine for producing a roving from a fiber structure with at least one spinning position
- the spinning station has a swirl chamber with an inlet opening for the fiber structure and at least partially extending in the vortex chamber yarn formation element
- the spinning position in the swirl chamber directed air nozzles comprises, via the air in a predetermined direction of rotation in the vortex chamber can be introduced to impart to the supplied via the inlet opening fiber strand in the region of an inlet mouth of Garn avoirselements a rotation in said direction of rotation.
- Roving machines with corresponding spinning stations are known in the art and serve to produce a roving from an elongated fiber structure.
- the outer fibers of the fiber composite are wound around the inner core fibers by means of a vortex air flow generated by the air nozzles within the vortex chamber in the region of the inlet mouth of the yarn formation element and thereby form the binder fibers which determine the desired strength of the yarn.
- This creates a roving with a true rotation, which finally dissipated via a vent channel from the vortex chamber and z. B. can be wound on a sleeve.
- roving (other designation: sliver) is to be understood as meaning a fiber structure in which at least part of the fibers surround one another wound inside core.
- This type of yarn is characterized by the fact that, despite a certain strength, which is sufficient to transport the yarn to a subsequent textile machine, it is still delayable.
- the roving can thus with the help of a defaulting device, z.
- a roving processing textile textile machine such as a ring spinning machine, are warped before it is finally spun into a conventional yarn.
- a fiber guide element is arranged, via which the fiber composite is guided into the spinneret and finally into the region of the yarn-forming element, wherein elongated structures are generally used as yarn-forming elements find use with an internal exhaust duct.
- the object of the present invention is therefore to propose a yarn-forming element and a roving machine equipped therewith, which makes it possible to produce a roving with particularly high quality.
- the object is achieved by a Garn Strukturselement and a roving with the features of the independent claims.
- the yarn formation element is characterized in that it comprises an end face surrounding the inlet mouth, which has the shape of a truncated cone at least in sections, the top surface of the truncated cone being arranged between the base surface of the truncated cone and the outlet of the yarn formation element.
- the top surface of the truncated cone that plane and circular surface of the truncated cone with the smaller radius and below the base surface that flat and circular surface of the truncated cone with the larger radius understood. Shown is a corresponding truncated cone in Figure 3a.
- the yarn formation element thus has an end face which is at least partially conical or funnel-shaped, the funnel or cone or the above-mentioned truncated cone tapering in the direction of the outlet of the yarn formation element.
- a mold is produced for example by countersinking.
- the angle between a surface line of the truncated cone and its conical axis is an amount smaller than 90 ° and greater than 70 °.
- the cone axis is the axis of rotation of the truncated cone.
- the surface line is a line that lies on the lateral surface of the truncated cone and in a plane with the cone axis runs. Reference is also made in this connection to FIG. 3a, which shows a corresponding truncated cone.
- the end face should thus have the shape of a relatively flat conical stump whose height should be only between 2% and 20% of the diameter of the base. If a thick point of the roving now reaches the region of the end face which is thicker than the inside diameter of the drawing channel, then the thick point remains hanging in the region of the end face of the yarn formation element or of the truncated cone-shaped section and can thus be easily removed.
- the frustoconical portion of the end face should pass directly into the outlet channel, so that the diameter or the cross-sectional shape of the discharge channel in this area corresponds to the diameter or the shape of the top surface of the truncated cone.
- the withdrawal channel has a longitudinal axis and the longitudinal axis and said cone axis parallel or co-linear to each other.
- the withdrawal channel is preferably rotationally symmetrical, the longitudinal axis in this case corresponding to the axis of rotation of the withdrawal channel.
- the discharge channel has an inner diameter in a region adjoining the inlet mouth or the truncated cone, the amount of which is 4 mm to 12 mm, preferably 6 mm to 8 mm.
- the air pressure of the air supplied via the air nozzles must be significantly increased in order to ensure the required turbulence within the vortex chamber, since a part of the incoming air leaves the vortex chamber via the inlet mouth of the yarn formation element, without contributing to vortex formation.
- the yarn formation element in the region of the inlet mouth has a cylindrical wall with a cylindrical outer surface and a cylindrical, the discharge channel bounding, inner surface, wherein the inner surface and the outer surface are concentric.
- the yarn-forming element therefore has at least one cylindrical section with a constant wall thickness in the area adjoining the end face.
- the entire end face of the yarn formation element which connects the outer surface and the inner surface has the shape of a truncated cone.
- the section of the yarn formation element having the inlet mouth thus preferably has three surface sections, namely a surface section formed by the outer surface of the yarn formation element, a surface section formed by the inner surface adjoining the inlet mouth (and at least partially delimiting the exhaust channel) and a surface section formed by the front side, which has the shape of a truncated cone.
- the transition region between the end face and the outlet channel and / or the transition between the end face and an outer surface of the Garn realiseselements not sharp, but is rounded.
- the radius of the rounded portions which should have a ring shape in a plan view of the end face of the Garn Strukturselements should be between 0, 1 mm and 2.0 mm.
- the yarn formation element has a chamfer in the region of the end face, which likewise has the shape of a truncated cone.
- the chamfer should in this case preferably merge into the outer surface of the yarn-forming element and be spaced from the discharge channel by a frustoconical region of the end face of the yarn-forming element.
- the base of the chamfer stump forming the chamfer is arranged between the top surface of this truncated cone and the outlet of the yarn-forming element.
- the chamfer should thus form a truncated cone, which is set with respect to the truncated cone described in claim 1 on the head.
- the base area of the truncated cone adjoining the discharge channel corresponds to the top surface of the truncated cone formed by the chamfer. Both truncated cones thus advantageously merge directly into each other.
- the chamfer encloses an angle ⁇ with a longitudinal axis of the discharge channel, the amount of which lies between 20 ° and 70 °, preferably between 30 ° and 60 °. Furthermore, in a longitudinal section of the yarn formation element with the further, frustoconical region mentioned in claim 1, the chamfer should include an angle which lies between 70 ° and 90 °. If the chamfer is arranged between the withdrawal channel and the further region of the end face of the yarn formation element which forms a truncated cone, then said angle should be greater than 140 ° and less than 180 °.
- the end face has, in addition to a first frustoconical region, at least one second frustoconical region. wherein the second frusto-conical portion surrounds the first frustoconical portion in a plan view of the end face of the yarn-forming member.
- the cylindrical end of the Garn Strukturselements which also includes the inlet opening is first processed with a counterbore such that the mentioned in claim 1 area, which has the shape of a truncated cone and that subsequently the transition region between the end face of the yarn formation member and the outer surface of the yarn formation member is provided with an annular chamfer.
- the second frusto-conical region directly adjoins the first frustoconical region, wherein both frusto-conical regions preferably extend concentrically with one another. It is conceivable in this connection that the base surface of the first frusto-conical region forms the top surface of the second frusto-conical region. Furthermore, it is advantageous if the diameter of the top surface of the first frusto-conical region is smaller than the top surface of the second frusto-conical region.
- the yarn formation element according to the invention is characterized in that at least one part, for. B. an annular portion of an end face of Garn Strukturselements, preferably the entire end face, is inclined in a longitudinal section of the yarn formation element inwardly in the direction of the discharge channel.
- the present invention relates to a roving machine for producing a roving from a fiber structure with at least one spinning station, wherein the spinning station a vortex chamber with an inlet opening for the fiber structure and a having at least partially in the vortex chamber extending Garn avoirselement.
- the spinning station furthermore comprises air nozzles directed into the vortex chamber, via which air can be introduced into the vortex chamber in a predetermined direction of rotation, in order to impart a rotation in said direction of rotation to the fiber structure supplied via the inlet opening in the region of an inlet mouth of the yarn formation element.
- the yarn forming element has an outlet for the exit of the roving and an outlet channel connecting the inlet opening and the outlet, which the roving passes over the outlet before exiting.
- FIG. 1 shows a roving machine in a side view
- FIG. 2 shows a detail of a known spinneret of a pre-spinning machine
- FIG. 3a shows a truncated cone
- FIGS. 4a to 7b show a section of further embodiments of yarn formation elements according to the invention in longitudinal section
- FIG. 8 shows a detail of another spinneret of a roving machine.
- Figure 1 shows a schematic view of a section of a roving machine.
- the roving frame can be equipped with a drafting system with several Axle 23 rotating, drafting rollers 21 include (only two of the six drafting rollers 21 are provided with a reference numeral), the drafting system is supplied during the spinning operation with a fiber strand 1, for example in the form of a relined tape.
- the roving frame shown comprises one or more adjacent spinnerets 22 each having an internal swirl chamber 15 (see Figure 2), in which the fiber structure 1 or at least a part of the fibers of the fiber composite 1 is provided with a rotation (the exact operation of the Spinneret 22 will be described in more detail below).
- the roving machine may include a take-off device 24 with a plurality of co-operating take-off rollers 31 and a take-off rollers 31 downstream winding device 25, with the aid of which the spinneret 22 via an outlet 4 (which simultaneously forms the outlet 4 of the exhaust duct 5 shown in more detail, for example in Figure 2 ) leaving roving 2 can be wound on a sleeve 32 to form a coil, in which case a traversing element 20 can be used.
- the roving machine according to the invention need not necessarily have a drafting arrangement, as shown in FIG. Also, the take-off rollers 31 are not mandatory.
- the roving machine operates according to an air spinning method.
- the fiber structure 1 is guided via an inlet opening 16, in which preferably a so-called fiber guide element is arranged, into the swirl chamber 15 of the spinneret 22 (see also FIG. 2).
- a rotation ie at least part of the free fiber ends of the fiber composite 1 is detected by an air flow, which is generated by correspondingly arranged in a vortex chamber 15 surrounding the vortex chamber wall 26 air nozzles 18.
- a part of the fibers is pulled out of the fiber structure 1 at least a little way and wound around the tip of a yarn formation element 17 projecting into the swirl chamber 15.
- the produced roving 2 is a yarn with a relatively small proportion of binding fibers, or a yarn in which the binding fibers are wound relatively loosely around the inner core, so that the Roving 2 remains forgettable.
- a subsequent textile machine for example, a ring spinning machine
- the produced roving 2 on a subsequent textile machine must be pulled again with the help of a drafting system to be processed into a conventional yarn, which can be processed for example on a loom to a fabric.
- the air nozzles 18 it should also be mentioned as a precautionary measure at this point that they should generally be oriented in such a way that together they produce an identically directed air flow with a uniform direction of rotation.
- the individual air nozzles 18 are in this case arranged rotationally symmetrical to one another.
- the inclination of the air nozzles 18 relative to the longitudinal axis L of the discharge channel 5 can be selected within certain limits.
- the air nozzles 18 could run perpendicular to said longitudinal axis L (see air nozzle 18 shown on the left in FIG. 2).
- FIGS. 3b to 7b show an already known Garn Strukturselement 17 with a perpendicular to Embodiments of yarn formation elements 17 according to the invention.
- the yarn formation element 17 is characterized in that said end surface, which is part of the wall 30 of the yarn formation element 17, is slightly inclined inwards.
- the yarn-forming element 17 comprises an end face 6 surrounding the inlet mouth 3, which has the shape of a truncated cone 27 at least in sections, the top surface 7 of the truncated cone 27 being arranged between the base 8 of the truncated cone 27 and the outlet 4 of the yarn-forming element 17.
- FIG. 3a shows that the top surface 7 is the circular area with the smaller radius and the base area 8 is the circular area with the larger radius.
- the lateral surface 29 is finally the surface that connects the base 8 with the top surface 7.
- the generatrices 28 are the lines that lie on the lateral surface 29 and extend in a plane with the cone axis K, which in turn represents the axis of rotation of the truncated cone 27.
- the yarn formation element 17 according to the invention has an end face 6 which at least partially has the above-mentioned truncated cone shape, the angle ⁇ between the longitudinal axis L shown only in FIG. 3b for reasons of clarity of the discharge channel 5 and any generatrix 28 of the truncated cone 27 has an amount which is greater than 70 ° and less than 90 °.
- the said area thus forms a relatively shallow cone, which thus also has only a small funnel effect.
- the frusto-conical portion forms the entire end face 6 of the Garn avoirselements 17, which surrounds the inlet port 3 and which connects the discharge channel 5 bounding inner surface 19 of Garn avoirselements 17 and an outer surface 10 thereof, which preferably concentric to said inner surface 19 extends (at least in a first adjoining the end face 6 area).
- FIG. 3b A corresponding embodiment is shown in FIG. 3b.
- transition 1 1 between the end face 6 of the Garn Strukturselements 17 and said outer surface 10 thereof is rounded ( Figures 4a and 4b).
- transition region 9 between the end face 6 of the Garn Strukturselements 17 and the discharge channel 5 may be rounded ( Figure 4b).
- FIGS. 5a and 5b show solutions in which the end face 6 of the yarn formation element 17 comprises, in addition to the region with the shape of a truncated cone 27, a further region which likewise has the shape of a truncated cone 27.
- the end face 6 thus preferably comprises a first frusto-conical region 13 and a second frusto-conical region 14.
- the angle ⁇ between a surface line 28 of the first truncated cone-shaped region 13 and the longitudinal axis L of the discharge channel 5 is greater than the angle ⁇ between a surface line 28 of the second frusto-conical region 14 and the longitudinal axis L of the discharge channel 5 ( Figure 5b).
- Figures 6a and 6b show that the end face 6 of Garn Strukturselements 17 may be partially formed by a chamfer 12, wherein the angle ß between a surface line 28 of the truncated cone 27, which is described by the chamfer 12, and the longitudinal axis L of the discharge channel 5 is preferably in the range already mentioned in the general description.
- the chamfer 12 forms, in principle, the second frusto-conical region 14 described above.
- FIG. 8 shows a detail of a cross-section through a further spinneret 22.
- the spinneret 22 also comprises one or more piecing air nozzles 33, via which during one Piecing process (also) compressed air can be introduced into the vortex chamber 15.
- the spinneret 22 has special Anspinn Kunststoffdüsen 33 which are fed exclusively or together with the air nozzles 18 during a piecing process with compressed air.
- the piecing is the initial sequence of the Vorgarnher too in which the fiber structure 1 is introduced into the hitherto empty vortex chamber 15 and twisted there to a roving 2.
- the roving section formed thereby is taken over by means of a corresponding withdrawal device 24 after leaving the withdrawal channel 5 and continues to be brought into contact with a rotating sleeve 32 while the supply and rotation of the fiber assembly 1 continues.
- This is followed by the normal operation of the spinneret 22, in which further rovings 2 are continuously produced from the fed fiber structure 1 and withdrawn from the spinneret 22.
- the Anspinn Kunststoffdüsen 33 in this case should be inclined relative to the longitudinal axis L of the discharge channel 5 in order to generate an air flow that extends at least a little way into the discharge channel 5 (the angle between the longitudinal axis L and a central axis of Anspinn Kunststoffdüsen 33 and theirêtsvek- gates should therefore deviate from 90 °).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00675/16A CH712489A1 (en) | 2016-05-26 | 2016-05-26 | Garnbildungselement for a roving and equipped therewith roving. |
PCT/IB2017/052586 WO2017203376A1 (en) | 2016-05-26 | 2017-05-04 | Twine forming element for a pre-spinning machine and pre-spinning machine equipped therewith |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3464691A1 true EP3464691A1 (en) | 2019-04-10 |
EP3464691B1 EP3464691B1 (en) | 2023-05-03 |
Family
ID=58707971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17723523.1A Active EP3464691B1 (en) | 2016-05-26 | 2017-05-04 | Yarn forming element for a pre-spinning machine and pre-spinning machine equipped therewith |
Country Status (6)
Country | Link |
---|---|
US (1) | US10900144B2 (en) |
EP (1) | EP3464691B1 (en) |
JP (1) | JP6972025B2 (en) |
CN (1) | CN109154110B (en) |
CH (1) | CH712489A1 (en) |
WO (1) | WO2017203376A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021191184A1 (en) * | 2020-03-25 | 2021-09-30 | Saurer Spinning Solutions Gmbh & Co. Kg | Device for individualizing fibers, and spinning device comprising such a device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH712663A1 (en) * | 2016-07-14 | 2018-01-15 | Rieter Ag Maschf | Process for processing a strand-like fiber composite and roving machine. |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2852906A (en) * | 1951-12-14 | 1958-09-23 | Du Pont | Method and apparatus for producing bulky continuous filament yarn |
US2853906A (en) | 1956-06-07 | 1958-09-30 | Stanley J Pesta | Fixture for stripping metal ends from containers |
CH615467A5 (en) * | 1977-05-17 | 1980-01-31 | Toyo Boseki | Process and apparatus for the purely mechanical production of a staple-fibre yarn consisting of natural or synthetic fibres |
US4290378A (en) * | 1979-08-31 | 1981-09-22 | Monsanto Company | Twisted singles carpet yarn |
ATE20253T1 (en) * | 1983-04-12 | 1986-06-15 | Rieter Ag Maschf | FALSE SPIN UNIT. |
JPS60259636A (en) * | 1984-06-04 | 1985-12-21 | Toyoda Autom Loom Works Ltd | Nozzle for spinning fasciated yarn |
IN166161B (en) * | 1985-06-07 | 1990-03-24 | Alan Nicholas Jacobsen | |
JPH01162829A (en) | 1987-12-18 | 1989-06-27 | Mas Fab Rieter Ag | Air jet nozzle and method for forming rotary air layer at twisting part of said nozzle |
CS269174B1 (en) * | 1988-04-21 | 1990-04-11 | Havranek Zdenek | Spinning jet for yarn's pneumatic formation |
CH676725A5 (en) * | 1988-11-07 | 1991-02-28 | Rieter Ag Maschf | |
DE3927910A1 (en) * | 1989-08-24 | 1991-02-28 | Stahlecker Fritz | FALSE SWIRL NOZZLE FOR PNEUMATIC SPIRAL SPINNING |
JPH0469471U (en) * | 1990-10-26 | 1992-06-19 | ||
JPH0674530B2 (en) * | 1991-07-30 | 1994-09-21 | 村田機械株式会社 | Spinning equipment |
JPH0748673Y2 (en) * | 1992-02-19 | 1995-11-08 | 村田機械株式会社 | Spinning equipment |
JP3552618B2 (en) * | 1999-12-13 | 2004-08-11 | 村田機械株式会社 | Core yarn manufacturing method and apparatus |
EP1143051B2 (en) * | 2000-04-04 | 2011-06-29 | Murata Kikai Kabushiki Kaisha | Hollow guide shaft member in a vortex Spinning apparatus and method of its application |
US20020152739A1 (en) * | 2000-12-22 | 2002-10-24 | Maschinenfabrik Rieter Ag | Spinning device |
CN1200155C (en) * | 2002-07-10 | 2005-05-04 | 东华大学 | Complex twisting device for air-jet eddy-current spinning |
DE10255035A1 (en) * | 2002-11-19 | 2004-06-03 | Wilhelm Stahlecker Gmbh | Air vortex spinning unit for staple fibers includes contraction in annular air exit channel near yarn draw-off tube entry |
DE602004016489D1 (en) * | 2004-07-28 | 2008-10-23 | Fare Spa | Apparatus and method for treating synthetic yarns |
DE102004052206A1 (en) * | 2004-10-19 | 2006-04-20 | Wilhelm Stahlecker Gmbh | Air-jet spinning device |
CN101476180B (en) * | 2009-01-23 | 2010-12-08 | 东华大学 | Self-twisting hollow ingot special for jet air vortex spinning |
DE102012108613A1 (en) * | 2012-09-14 | 2014-03-20 | Maschinenfabrik Rieter Ag | Spinning station of a roving machine |
US9290863B2 (en) * | 2013-02-13 | 2016-03-22 | Maschinenfabrik Rieter Ag | Spinning unit of an air-jet spinning machine |
-
2016
- 2016-05-26 CH CH00675/16A patent/CH712489A1/en not_active Application Discontinuation
-
2017
- 2017-05-04 CN CN201780031625.6A patent/CN109154110B/en active Active
- 2017-05-04 EP EP17723523.1A patent/EP3464691B1/en active Active
- 2017-05-04 US US16/303,267 patent/US10900144B2/en active Active
- 2017-05-04 JP JP2018561497A patent/JP6972025B2/en active Active
- 2017-05-04 WO PCT/IB2017/052586 patent/WO2017203376A1/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021191184A1 (en) * | 2020-03-25 | 2021-09-30 | Saurer Spinning Solutions Gmbh & Co. Kg | Device for individualizing fibers, and spinning device comprising such a device |
Also Published As
Publication number | Publication date |
---|---|
US20190323151A1 (en) | 2019-10-24 |
US10900144B2 (en) | 2021-01-26 |
JP2019519690A (en) | 2019-07-11 |
CH712489A1 (en) | 2017-11-30 |
JP6972025B2 (en) | 2021-11-24 |
CN109154110A (en) | 2019-01-04 |
WO2017203376A1 (en) | 2017-11-30 |
CN109154110B (en) | 2021-06-18 |
EP3464691B1 (en) | 2023-05-03 |
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