EP1612309B1 - Fibre condensing device for a spinning machine - Google Patents
Fibre condensing device for a spinning machine Download PDFInfo
- Publication number
- EP1612309B1 EP1612309B1 EP05010863A EP05010863A EP1612309B1 EP 1612309 B1 EP1612309 B1 EP 1612309B1 EP 05010863 A EP05010863 A EP 05010863A EP 05010863 A EP05010863 A EP 05010863A EP 1612309 B1 EP1612309 B1 EP 1612309B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fiber bundle
- perforated belt
- yarn
- collecting device
- spinning machine
- 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.)
- Not-in-force
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Classifications
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- 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
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D3/00—Woven fabrics characterised by their shape
- D03D3/02—Tubular fabrics
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- 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
- D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/292—Conjugate, i.e. bi- or multicomponent, fibres or filaments
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
- D03D15/587—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads adhesive; fusible
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/01—Natural vegetable fibres
- D10B2201/02—Cotton
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/04—Heat-responsive characteristics
- D10B2401/041—Heat-responsive characteristics thermoplastic; thermosetting
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/061—Load-responsive characteristics elastic
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/16—Physical properties antistatic; conductive
Definitions
- the present invention relates to a fiber bundle collecting device for a spinning machine, and more specifically to a fiber bundle collecting device arranged, for example, downstream of a drafting device (drafting part) of a fine spinning machine and adapted to collect a fiber bundle drafted by the drafting device.
- JP 2000-34631 A discloses a technique according to which the transport belt (endless perforated belt) is formed of a fabric using a polyamide multi-filament yarn with a diameter of less than 0.1 mm, whereby the suction airflow is made uniform to thereby enhance the suction efficiency.
- a plain-woven fabric is used as the fabric.
- JP 2003-113540 A discloses a technique according to which the endless perforated belt (air-permeable apron) is formed of a woven fabric.
- the endless perforated belt is formed of a fabric
- the yarn end resulting from the breakage or the frayed yarn end gets entangled with the fiber bundle being spun, thus adversely affects the collecting the fibers, which may lead to yarn breakage and a defective yarn quality.
- fraying starts to occur there is a fear of the perforated belt being ear brought into a state which it can be no longer used.
- the perforated belt is formed of a fabric
- fibers of the fiber bundle being spun are likely to be caught by crossing portions of the yarn forming the fabric.
- the fiber caught adversely affects the fiber bundle, thus can lead to yarn breakage or a defective yarn quality, so that it is necessary to clean the perforated belt frequently or replace the perforated belt with a new one.
- the fibers caught in yarn crossing portions cannot be easily removed by a blast of compressed air or the like, and their removal takes time and effort.
- the present invention has been made in view of the above problems
- the present invention provides a fiber bundle collecting device for a spinning machine which collects a fiber bundle drafted by a drafting part.
- the fiber bundle collecting device is equipped with: a delivery portion provided on a downstream side of a final delivery roller pair of the drafting part and provided with a nip roller; a sucking portion having a guide surface provided with a suction hole, at least on an upstream side of a nipping point of the delivery portion with respect to a moving direction of the fiber bundle; and a perforated belt rotated so as to slide an the guide surface.
- the perforated belt is formed of a woven fabric or a knitted fabric, and the yarn is fused at the crossing portions.
- Fig. 1A is a schematic side view, partly in section, of the fiber bundle collecting device
- Fig. 1B is a schematic perspective view of a perforated belt
- Fig. 1C is a schematic diagram showing yarn crossing portions of the perforated belt
- Fig. 1D is a schematic diagram for illustrating an open area ratio
- Fig. 2 is a partial schematic view showing a relationship between a sucking portion and a bottom nip roller as seen from the obliquely upper left side in Fig. 1A , without a top roller side portion.
- the fiber bundle collecting device is basically of the same construction as the fiber bundle collecting device as disclosed in JP 2003-113540 A , previously filed by the present applicant. As shown in Fig. 1A , a fiber bundle collecting device 11 is provided on a downstream side of a final delivery roller pair 13 of a drafting device 12 as a drafting part.
- the final delivery roller pair 13 is composed a front bottom roller 14 and a front top roller 15.
- the fiber bundle collecting device 11 is equipped with a nip roller pair 16 as a delivery portion, a sucking portion 17, and a perforated belt 18.
- the nip roller pair 16 is composed of a bottom nip roller 19a serving as a driving roller portion formed on a rotation shaft 19 arranged parallel to the front bottom roller 14, and a top nip roller 20 pressed against the bottom nip roller 19a through the intermediation of the perforated belt 18.
- the top nip roller 20 is supported, for each two spindles, by a weighting arm (not shown) through a support member 21.
- the support member 21 is formed integrally with the support member of the front top roller 15.
- the bottom side portion of the fiber bundle collecting device 11 is formed by using half the number of the spindles arranged between roller stands 22 of the drafting device 12, which, in this embodiment, are four spindles as one unit.
- a support arm 23 At an intermediate position of the roller stands 22 arranged at a predetermined interval in the longitudinal direction of the machine frame, there is arranged a support arm 23 in a state in which it is supported at the proximal end by a support beam (not shown) extending in the longitudinal direction of the machine frame on the rear side of a back bottom roller (not shown), with the rotation shaft 19 being supportedbetween the roller stand 22 and the support arm 23.
- the rotation shaft 19 is formed in a predetermined length corresponding to a plurality of spindles (which, in this embodiment, are four spindles), and bearings (not shown) fixed to both ends thereof are fitted into end plugs 25. And, the end plugs 25 are supported at fit-engagement portions 25a by support portions 22a and 23a provided on the roller stands 22 and the support arms 23, whereby each of the rotation shafts 19 is rotatably supported between the roller stand 22 and the support arm 23.
- the support portions 22a and 23a are formed so as to be capable of supporting two end plugs 25, thus making it possible to support the end plugs 25 mounted to the ends of the rotation shafts 19 adjacent to each other.
- each rotation shaft 19 there is provided a gear 26 serving as a torque transmitting portion for transmitting a torque of a drive source.
- the gear 26 is formed integrally with the rotation shaft 19.
- the front bottom roller 14 is used as the drive source for the rotation shaft 19.
- An intermediate gear 28 is rotatably supported by a support arm 27 whose proximal end is fixed to the support beam as in the case of the support arm 23, and the intermediate gear 28 is in mesh with the gear portion 14a and the gear 26. That is, the torque of the front bottom roller 14 is transmitted to the rotation shaft 19 through the gear portion 14a, the intermediate gear 28, and the gear 26.
- a suction duct (not shown) is arranged in the fine spinning machine so as to extend in the longitudinal direction thereof (the direction perpendicular to the plane of Fig. 1A ).
- the sucking portion 17 is equipped with suction pipes 29 and 30 extending parallel to the rotation shaft 19, and a connection tube 31 connected to the suction duct and adapted to apply negative pressure to the suction pipes 29 and 30.
- the connection tube 31 is arranged in front of the gear 26 so that a part of the connection tube 31 may serve as a cover of the gear 26 and the intermediate gear 28.
- the connection tube 31 is, at the proximal end thereof, connected to the suction duct through a bellows-like connection tube 32.
- First ends of the suction pipes 29 and 30 are fitted into fitting holes formed on the right-hand and left-hand sides of the forward end portion of the connection tube 31, and second ends of the suction pipes 29 and 30 are fitted into the end plugs 25.
- each of the suction pipes 29 has a guide surface 29b in which there is formed a suction hole 29a extending upstream of the nipping point of the nip roller pair 16 with respect to a moving direction of a fiber bundle (fleece) F.
- Each of the suction pipes 30 has a guide surface 30b in which there is formed a suction hole 30a extending downstream.
- the suction pipe 29 is arranged so as to be situated on the upstream side, and the suction pipe 30 is arranged so as to be situated on the downstream side of the nipping point of the bottom nip roller 19a with respect to the moving direction of the fiber bundle F.
- suction nozzles 33 of a single type pneumatic device adapted to suck the fiber bundle F delivered from the drafting device 12 at the time of yarn breakage.
- the proximal ends of the suction nozzles 33 are connected to a suction duct (not shown).
- the perforated belt 18 is wrapped such that a part of the perforated belt 18 is in contact with the suction pipes 29 and 30, and that another part of the perforated belt 18 is in contact with the bottom nip roller 19a.
- the perforated belt 18 is adapted to run as the bottom nip roller 19a rotates while sliding on the guide surfaces 29b and 29b.
- the perforated belt 18 is formed as a seamless loop of a plain-woven fabric. In this embodiment, it is obtained by cutting a cylindrically woven fabric in a predetermined width. As shown in Fig. 1C , a thermal fusion yarn 34 of a sheath-core structure is used as the yarn forming the fabric. At crossing portions 35 of the yarn forming the fabric, the sheath portions 34a of the thermal fusion yarn 34 are fused.
- the core portion 34b and the sheath portion 34a of the thermal fusion yarn 34 are both formed of polyamide; the core portion 34b is formed of a polyamide whose melting point is 260°C, and the sheath portion 34a is formed of a polyamide whose melting point is 220°C. Further, in this embodiment, the core portion 34b consists of a mono-filament.
- the fabric is woven with the thermal fusion yarn 34, whose diameter (thickness) is 0.05 to 0.15 mm. From the viewpoint of the sucking action on the fiber bundle F being spun, a thinner yarn is desirable; however, that would result in the strength of the perforated belt 18 being rather insufficient; thus, a thickness in the above-mentioned range is desirable. Further, the open area ratio ranges from 25 to 30%. Here, the term open area ratio is defined as: (A2/A1) x 100 (%), where, as shown in Fig.
- A1 is the area of the portion surrounded by the center lines (indicated by dashed lines) of two adjacent warp portions 36a and the center lines (indicated by dashed lines) of two adjacent weft portions 36b
- A2 is the area of the shaded portion (opening) surrounded by the two warp portions 36a and the two weft portions 36b.
- the perforated belt 18 is endowed with an anti-static function.
- the anti-static function is imparted by applying an anti-static agent to the perforated belt 18.
- the anti-static agent suitably used is a well-known one, for example, a surface active agent, such as cation surface active agent or amphoteric surface active agent.
- the perforated belt 18 After forming a cylindrical plain-woven fabric of the thermal fusion yarn 34, it is cut in a predetermined width and maintained at a temperature at which solely the sheath portion 34a is melted, whereby it is possible to obtain the perforated belt 18 in which the crossing portions 35 of the warp and weft are fused. After being impregnated with a solution containing surface active agent, the perforated belt 18 is dried and subjected to charging prevention treatment.
- the fiber bundle F is drafted by the drafting device 12, and then guided from the final delivery roller pair 13 to the fiber bundle collecting device 11.
- the nip roller pair 16 are rotated at a velocity somewhat higher than the surface velocity of the final delivery roller pair 13, and the fiber bundle F passes the nipping point of the nip roller pair 16 under an appropriate tension before moving to the downstream side while being reversed and twisted.
- the sucking action of the duct is exerted on the suction pipes 29 and 30 through the connection tube 31, and the sucking action of the suction holes 29a and 30a formed on the guide surfaces 29b and 30b is exerted on the fiber bundle F through the perforated belt 18.
- the fiber bundle F then moves to positions corresponding to the suction holes 29a and 30a, while sucked and collected.
- the perforated belt 18 is formed of an ordinary fabric (a fabric whose yarn crossing portions 35 have undergone no treatment) as in the prior art
- the resultant yarn end gets entangled with the fiber bundle F being spun to thereby cause yarn breakage, a defect in yarn quality, etc., or fibers of the fiber bundle F being spun get caught in the yarn crossing portions 35 to thereby adversely affect the spinning.
- the yarn (the thermal fusion yarn 34) forming the fabric is fused at the crossing portions 35, so, even if the yarn forming the fabric, etc.
- the bottom nip roller 19a around which the perforated belt 18 is wrapped rotates at a rotating velocity which is approximately the same as that of the front bottom roller 14 of the drafting device 12 (200 to 300 rpm), so that static electricity is likely to be generated in the perforated belt 18, and the static electricity generated is likely to be charged.
- a rotating velocity which is approximately the same as that of the front bottom roller 14 of the drafting device 12 (200 to 300 rpm)
- the perforated belt 18 is not restricted to a plain-woven fabric 37 (shown, for example, in Fig. 3A ); it is also possible to use a fabric woven by some other weaving method, such as a twill fabric 38 (shown, for example, in Fig. 3B ).
- the perforated belt 18 is not restricted to one formed of a woven fabric; it may also be formed of a knitted fabric. In this case, due to the elasticity of the knitted fabric, it is possible for the perforated belt 18 to be rotated under an appropriate tension without any tension device provided.
- the perforated belt 18 is not restricted to a seamless loop formed of an endless woven fabric or knitted fabric; it may also be a strip-like woven fabric, knitted fabric or the like in the form of a seamed loop with its ends firmly attached to each other.
- the method of endowing the perforated belt 18 with an anti-static function it is possible to use a conductive fiber (electrically conductive fiber) as the yarn forming the perforated belt 18.
- a conductive fiber electrically conductive fiber
- the conductive fiber include a fiber spun mixed with carbon black.
- the perforated belt 18 with an anti-static function instead of the method in which an anti-static agent is applied after the formation of the perforated belt 18, it is possible to form the perforated belt 18 of a woven fabric or knitted fabric using yarn with an anti-static agent applied thereto.
- the thermal fusion yarn 34 is not restricted to the one in which both the sheath portion 34a and the core portion 34b are formed of polyamide.
- both the sheath portion 34a and the core portion 34b are formed of polyester, or one in which the sheath portion 34a is formed of polyester and in which the core portion 34b is formed of polyamide.
- the arrangement of the rotation shaft 19 and the suction pipes 29 and 30 are not restricted to the one in which Tour spindles constitute one unit; it is also possible to adopt an arrangement in which the spindles between each pair of adjacent roller stands 22 (e.g., eight spindles) constitute one unit, or one in which two spindles constitute one unit. Further, is not always necessary for all the units include the same number of spindles; it is also possible to arrange spindles in different numbers between the roller stands 22 (e.g., six spindles and two spindles) and to provide two kinds of units in correspondence therewith.
- suction holes 29a and 30a are provided an the upstream side and the downstream side with respect to the nipping point for the fiber bundle F
- suction holes 29a are provided solely on the upstream side of the nipping point.
- the suction pipes 30 instead of the suction pipes 30, pipes or bars of the same outer configuration as the suction pipes 30 but equipped with no suction holes 30a are used, whereby it is possible for the production method and assembly to be substantially the same as those of the above embodiment.
- the delivery portion of the fiber bundle collecting device 11 is not restricted to the construction equipped with the nip roller pair 16.
- a suction pipe 40 with a substantially egg-shaped sectional configuration is provided, and a suction hole 40a is formed at a predetermined position of the suction pipe 40.
- the perforated belt 18 is slidably wrapped around the outer periphery of the suction pipe 40 and the tension roller 41. Further, it is also possible to transmit the rotation of the front top roller 15 to the top nip roller 20 through a drive belt 42 and to drive the top nip roller 20 while keeping it in press contact with the perforated belt 18, thereby driving the perforated belt 18.
- the present invention is applicable not only to the drafting device of a fine spinning machine but also to the drafting device of some other type of spinning machine.
- the perforated belt may be endowed with an anti-static function by imparting conductivity to the yarn forming the perforated belt, and may be formed of a woven fabric or a knitted fabric with an anti-static agent applied thereto.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Woven Fabrics (AREA)
Description
- The present invention relates to a fiber bundle collecting device for a spinning machine, and more specifically to a fiber bundle collecting device arranged, for example, downstream of a drafting device (drafting part) of a fine spinning machine and adapted to collect a fiber bundle drafted by the drafting device.
- There have been proposed various fiber bundle collecting devices adapted to previously collect a drafted fiber bundle prior to twisting to thereby achieve an improvement in yarn quality, such as a reduction in fluff. To provide basic functions of collecting and transporting the fiber bundle, an endless perforated belt is used (see, for example,
JP 2000-34631 A JP 2003-113540 A JP 2000-34631 A JP 2003-113540 A - However, in the case where the endless perforated belt is formed of a fabric, when breakage of the yarn of the fabric forming the perforated belt or a fray of an end portion the perforated belt occurs during spinning, the yarn end resulting from the breakage or the frayed yarn end gets entangled with the fiber bundle being spun, thus adversely affects the collecting the fibers, which may lead to yarn breakage and a defective yarn quality. Further, when fraying starts to occur, there is a fear of the perforated belt being ear brought into a state which it can be no longer used. According to
JP 2000-34631 A DE 10 325 383 A ,US 6,308,878 orDE 19 837 183JP 2004-100093 - Further, in the case where the perforated belt is formed of a fabric, fibers of the fiber bundle being spun are likely to be caught by crossing portions of the yarn forming the fabric. When a fiber is caught such crossing portion, the fiber caught adversely affects the fiber bundle, thus can lead to yarn breakage or a defective yarn quality, so that it is necessary to clean the perforated belt frequently or replace the perforated belt with a new one. Further, when cleaning the perforated belt, the fibers caught in yarn crossing portions cannot be easily removed by a blast of compressed air or the like, and their removal takes time and effort.
- The present invention has been made in view of the above problems
- in the prior art. It is an object of the present invention to provide
- a fiber bundle collecting device for a spinning machine which prevents fibers being spun from being caught by and adhering to crossing portions of a yarn forming a perforated belt to thereby achieve an improvement in terms of spinning performance and which can facilitate the Operation of removing the fibers adhering to the perforated belt, without involving a deterioration in the collecting/transporting function of the fiber bundle collecting device.
- To achieve the above object, the present invention provides a fiber bundle collecting device for a spinning machine which collects a fiber bundle drafted by a drafting part. The fiber bundle collecting device is equipped with: a delivery portion provided on a downstream side of a final delivery roller pair of the drafting part and provided with a nip roller; a sucking portion having a guide surface provided with a suction hole, at least on an upstream side of a nipping point of the delivery portion with respect to a moving direction of the fiber bundle; and a perforated belt rotated so as to slide an the guide surface. The perforated belt is formed of a woven fabric or a knitted fabric, and the yarn is fused at the crossing portions.
- In the accompanying drawings:
-
Fig. 1A is a schematic side view, partly in section, of a fiber bundle collecting device according to an embodiment of the present Invention; -
Fig. 1B is a schematic perspective view of a perforated belt; -
Fig. 1C is a schematic diagram showing yarn crossing portions of the perforated belt; -
Fig. 1D is a schematic diagram for illustrating an open area ratio; -
Fig. 2 is a partial schematic view showing a relationship between a sucking portion and a bottom nip roller; -
Fig. 3A is a schematic diagram showing a relationship between a warp and weft in a plain-woven fabric; -
Fig. 3B is a schematic diagram showing a relationship between a warp and weft in a twill fabric; -
Fig. 4 is a schematic side view of the fiber bundle collecting device according to another embodiment. - In the following, a fiber bundle collecting device according to an embodiment of the present invention mounted in a fine spinning machine will be described with reference to
Figs. 1A through 3B .Fig. 1A is a schematic side view, partly in section, of the fiber bundle collecting device,Fig. 1B is a schematic perspective view of a perforated belt,Fig. 1C is a schematic diagram showing yarn crossing portions of the perforated belt, andFig. 1D is a schematic diagram for illustrating an open area ratio.Fig. 2 is a partial schematic view showing a relationship between a sucking portion and a bottom nip roller as seen from the obliquely upper left side inFig. 1A , without a top roller side portion. - The fiber bundle collecting device is basically of the same construction as the fiber bundle collecting device as disclosed in
JP 2003-113540 A Fig. 1A , a fiberbundle collecting device 11 is provided on a downstream side of a final delivery roller pair 13 of adrafting device 12 as a drafting part. The final delivery roller pair 13 is composed afront bottom roller 14 and afront top roller 15. - The fiber
bundle collecting device 11 is equipped with anip roller pair 16 as a delivery portion, a suckingportion 17, and a perforatedbelt 18. Thenip roller pair 16 is composed of abottom nip roller 19a serving as a driving roller portion formed on arotation shaft 19 arranged parallel to thefront bottom roller 14, and atop nip roller 20 pressed against thebottom nip roller 19a through the intermediation of the perforatedbelt 18. Like the fronttop roller 15 of thedrafting device 12, thetop nip roller 20 is supported, for each two spindles, by a weighting arm (not shown) through asupport member 21. Thesupport member 21 is formed integrally with the support member of thefront top roller 15. - As shown in
Fig. 2 , the bottom side portion of the fiberbundle collecting device 11 is formed by using half the number of the spindles arranged between roller stands 22 of thedrafting device 12, which, in this embodiment, are four spindles as one unit. At an intermediate position of the roller stands 22 arranged at a predetermined interval in the longitudinal direction of the machine frame, there is arranged asupport arm 23 in a state in which it is supported at the proximal end by a support beam (not shown) extending in the longitudinal direction of the machine frame on the rear side of a back bottom roller (not shown), with therotation shaft 19 being supportedbetween the roller stand 22 and thesupport arm 23. - The
rotation shaft 19 is formed in a predetermined length corresponding to a plurality of spindles (which, in this embodiment, are four spindles), and bearings (not shown) fixed to both ends thereof are fitted intoend plugs 25. And, theend plugs 25 are supported at fit-engagement portions 25a bysupport portions support arms 23, whereby each of therotation shafts 19 is rotatably supported between the roller stand 22 and thesupport arm 23. Thesupport portions end plugs 25, thus making it possible to support theend plugs 25 mounted to the ends of therotation shafts 19 adjacent to each other. - At the longitudinal center of each
rotation shaft 19, there is provided agear 26 serving as a torque transmitting portion for transmitting a torque of a drive source. Thegear 26 is formed integrally with therotation shaft 19. In this embodiment, thefront bottom roller 14 is used as the drive source for therotation shaft 19. On thefront bottom roller 14, there is formed agear portion 14a (shown inFig. 1A ) at a position opposed to thegear 26. Anintermediate gear 28 is rotatably supported by asupport arm 27 whose proximal end is fixed to the support beam as in the case of thesupport arm 23, and theintermediate gear 28 is in mesh with thegear portion 14a and thegear 26. That is, the torque of thefront bottom roller 14 is transmitted to therotation shaft 19 through thegear portion 14a, theintermediate gear 28, and thegear 26. - A suction duct (not shown) is arranged in the fine spinning machine so as to extend in the longitudinal direction thereof (the direction perpendicular to the plane of
Fig. 1A ). The suckingportion 17 is equipped withsuction pipes rotation shaft 19, and aconnection tube 31 connected to the suction duct and adapted to apply negative pressure to thesuction pipes connection tube 31 is arranged in front of thegear 26 so that a part of theconnection tube 31 may serve as a cover of thegear 26 and theintermediate gear 28. At the same time, theconnection tube 31 is, at the proximal end thereof, connected to the suction duct through a bellows-like connection tube 32. First ends of thesuction pipes connection tube 31, and second ends of thesuction pipes - As shown in
Figs. 1A and2 , each of thesuction pipes 29 has aguide surface 29b in which there is formed asuction hole 29a extending upstream of the nipping point of thenip roller pair 16 with respect to a moving direction of a fiber bundle (fleece) F. Each of thesuction pipes 30 has aguide surface 30b in which there is formed asuction hole 30a extending downstream. Thesuction pipe 29 is arranged so as to be situated on the upstream side, and thesuction pipe 30 is arranged so as to be situated on the downstream side of the nipping point of the bottom niproller 19a with respect to the moving direction of the fiber bundle F. - As shown in
Fig. 1A , below and in the vicinity of thesuction pipe 30, there are arranged the distal ends ofsuction nozzles 33 of a single type pneumatic device adapted to suck the fiber bundle F delivered from the draftingdevice 12 at the time of yarn breakage. The proximal ends of thesuction nozzles 33 are connected to a suction duct (not shown). - As shown in
Fig. 1A , theperforated belt 18 is wrapped such that a part of theperforated belt 18 is in contact with thesuction pipes perforated belt 18 is in contact with the bottom niproller 19a. Theperforated belt 18 is adapted to run as the bottom niproller 19a rotates while sliding on the guide surfaces 29b and 29b. - The
perforated belt 18 is formed as a seamless loop of a plain-woven fabric. In this embodiment, it is obtained by cutting a cylindrically woven fabric in a predetermined width. As shown inFig. 1C , athermal fusion yarn 34 of a sheath-core structure is used as the yarn forming the fabric. At crossingportions 35 of the yarn forming the fabric, thesheath portions 34a of thethermal fusion yarn 34 are fused. In this embodiment, thecore portion 34b and thesheath portion 34a of thethermal fusion yarn 34 are both formed of polyamide; thecore portion 34b is formed of a polyamide whose melting point is 260°C, and thesheath portion 34a is formed of a polyamide whose melting point is 220°C. Further, in this embodiment, thecore portion 34b consists of a mono-filament. - The fabric is woven with the
thermal fusion yarn 34, whose diameter (thickness) is 0.05 to 0.15 mm. From the viewpoint of the sucking action on the fiber bundle F being spun, a thinner yarn is desirable; however, that would result in the strength of theperforated belt 18 being rather insufficient; thus, a thickness in the above-mentioned range is desirable. Further, the open area ratio ranges from 25 to 30%. Here, the term open area ratio is defined as: (A2/A1) x 100 (%), where, as shown inFig. 1D , A1 is the area of the portion surrounded by the center lines (indicated by dashed lines) of twoadjacent warp portions 36a and the center lines (indicated by dashed lines) of twoadjacent weft portions 36b, and A2 is the area of the shaded portion (opening) surrounded by the twowarp portions 36a and the twoweft portions 36b. - The
perforated belt 18 is endowed with an anti-static function. The anti-static function is imparted by applying an anti-static agent to theperforated belt 18. The anti-static agent suitably used is a well-known one, for example, a surface active agent, such as cation surface active agent or amphoteric surface active agent. - After forming a cylindrical plain-woven fabric of the
thermal fusion yarn 34, it is cut in a predetermined width and maintained at a temperature at which solely thesheath portion 34a is melted, whereby it is possible to obtain theperforated belt 18 in which thecrossing portions 35 of the warp and weft are fused. After being impregnated with a solution containing surface active agent, theperforated belt 18 is dried and subjected to charging prevention treatment. - Next, the operation of the fiber
bundle collecting device 11, constructed as described above, will be illustrated. - When the fine spinning machine is operated, the fiber bundle F is drafted by the drafting
device 12, and then guided from the final delivery roller pair 13 to the fiberbundle collecting device 11. Thenip roller pair 16 are rotated at a velocity somewhat higher than the surface velocity of the final delivery roller pair 13, and the fiber bundle F passes the nipping point of thenip roller pair 16 under an appropriate tension before moving to the downstream side while being reversed and twisted. - Further, the sucking action of the duct is exerted on the
suction pipes connection tube 31, and the sucking action of the suction holes 29a and 30a formed on the guide surfaces 29b and 30b is exerted on the fiber bundle F through theperforated belt 18. The fiber bundle F then moves to positions corresponding to the suction holes 29a and 30a, while sucked and collected. Thus, as compared with a spinning machine equipped with no fiberbundle collecting device 11, it is possible to restrain generation of fluff and waste cotton and to achieve an improvement in terms of yarn quality. - In the case where the
perforated belt 18 is formed of an ordinary fabric (a fabric whoseyarn crossing portions 35 have undergone no treatment) as in the prior art, when the yarn forming the fabric breaks, the resultant yarn end gets entangled with the fiber bundle F being spun to thereby cause yarn breakage, a defect in yarn quality, etc., or fibers of the fiber bundle F being spun get caught in theyarn crossing portions 35 to thereby adversely affect the spinning. However, in theperforated belt 18 of this embodiment, the yarn (the thermal fusion yarn 34) forming the fabric is fused at the crossingportions 35, so, even if the yarn forming the fabric, etc. breaks, there is no fear of the resultant yarn end being entangled with the fiber bundle F being spun or of fibers of the fiber bundles F being spun being caught in theyarn crossing portions 35. Further, even if fibers adhere to mesh portions of the woven fabric, knitted fabric or the like, it is possible to easily remove them by a blast of compressed air or by the action of suction airflow. - The bottom nip
roller 19a around which theperforated belt 18 is wrapped rotates at a rotating velocity which is approximately the same as that of thefront bottom roller 14 of the drafting device 12 (200 to 300 rpm), so that static electricity is likely to be generated in theperforated belt 18, and the static electricity generated is likely to be charged. When theperforated belt 18 is left in a state in which charging with static electricity is likely to occur, fibers are likely to adhere to theperforated belt 18. However, since theperforated belt 18 is endowed with an anti-static function, fibers do not easily adhere to theperforated belt 18. - This embodiment provides the following effects:
- (1) The
perforated belt 18 running while in contact with the guide surfaces 29b and 30b of thesuction pipes bundle collecting device 11, is formed of a sheet-like fabric in which the material yarn (the thermal fusion yarn 34) is fused at theyarn crossing portions 35. Thus, even if the yarn forming the fabric breaks, there is no fear of the resultant yarn end being entangled with the fiber bundle F being spun, or fibers of the fiber bundle F being caught in theyarn crossing portions 35. As a result, it is possible to achieve an improvement in terms of spinning performance by preventing the fibers spun from being caught by or adhering to the crossingportions 35 of the yarn forming theperforated belt 18, and to facilitate the operation of removing fibers adhering to theperforated belt 18, without involving a deterioration in the function of collecting/transporting the fiber bundle F. - (2) As the yarn forming the fabric (the sheet-like material) constituting of the material of the
perforated belt 18, thethermal fusion yarn 34 of a core-sheath structure is used. Thus, the yarn forming the fabric can be easily fused at the crossingportions 35. - (3) Both the core (the
core portion 34b) and the sheath (thesheath portion 34a) of thethermal fusion yarn 34 are formed of polyamide. Thus, even if the thickness of thethermal fusion yarn 34 is reduced to approximately 0.1 mm in order to reduce the thickness of theperforated belt 18, it is possible to ensure the requisite strength. Further, polyamide and cotton are congenial to each other, so that it is possible to smoothly perform spinning of cotton yarn and a union yarn composed of cotton and other fibers. - (4) Since the
perforated belt 18 is endowed with an anti-static function, fibers do not easily adhere to theperforated belt 18, so, in addition to the effect of preventing fibers from being caught due to the fusion of theyarn crossing portions 35, it is possible to achieve an improvement in terms of adhesion preventing effect. - (5) In the fabric constituting the material of the
perforated belt 18, thethermal fusion yarn 34 is used for both thewarp 36a and theweft 36b, so, as compared with the case in which thethermal fusion yarn 34 is used for only one of the warp and the weft, it is possible to effect fusion of theyarn crossing portions 35 more easily. - (6) Since the
perforated belt 18 is woven in fine mesh with a thin yarn of approximately 0.1 mm, the sucking action is efficiently exerted on the fiber bundle F. - (7) Since the
perforated belt 18 is formed as a seamless loop, the transport of the fiber bundle F is smoothly effected, and it is possible to prevent progress of fatigue, which is likely to be incurred at a seam portion. - (8) The fabric forming the
perforated belt 18 is formed of filament yarn, so, it is possible to achieve an improvement in terms of strength and breathability in comparison with staple yarn of the same thickness. - The above-described embodiment should not be construed restrictively; for example, the following modifications are possible.
- The
perforated belt 18 is not restricted to a plain-woven fabric 37 (shown, for example, inFig. 3A ); it is also possible to use a fabric woven by some other weaving method, such as a twill fabric 38 (shown, for example, inFig. 3B ). - The
perforated belt 18 is not restricted to one formed of a woven fabric; it may also be formed of a knitted fabric. In this case, due to the elasticity of the knitted fabric, it is possible for theperforated belt 18 to be rotated under an appropriate tension without any tension device provided. - The
perforated belt 18 is not restricted to a seamless loop formed of an endless woven fabric or knitted fabric; it may also be a strip-like woven fabric, knitted fabric or the like in the form of a seamed loop with its ends firmly attached to each other. - As the method of endowing the
perforated belt 18 with an anti-static function, it is possible to use a conductive fiber (electrically conductive fiber) as the yarn forming theperforated belt 18. Examples of the conductive fiber include a fiber spun mixed with carbon black. - As the method of endowing the
perforated belt 18 with an anti-static function, instead of the method in which an anti-static agent is applied after the formation of theperforated belt 18, it is possible to form theperforated belt 18 of a woven fabric or knitted fabric using yarn with an anti-static agent applied thereto. - The
thermal fusion yarn 34 is not restricted to the one in which both thesheath portion 34a and thecore portion 34b are formed of polyamide. For example, it is also possible to use one in which both thesheath portion 34a and thecore portion 34b are formed of polyester, or one in which thesheath portion 34a is formed of polyester and in which thecore portion 34b is formed of polyamide. - The arrangement of the
rotation shaft 19 and thesuction pipes - Instead of the construction in which the suction holes 29a and 30a are provided an the upstream side and the downstream side with respect to the nipping point for the fiber bundle F, it also possible to adopt a construction in which the
suction holes 29a are provided solely on the upstream side of the nipping point. In this case, instead of thesuction pipes 30, pipes or bars of the same outer configuration as thesuction pipes 30 but equipped with nosuction holes 30a are used, whereby it is possible for the production method and assembly to be substantially the same as those of the above embodiment. Further, it is also possible to eliminate thesuction pipes 30 and to wrap theperforated belt 18 between thesuction pipes 29 and the bottom niprollers 19a. - The delivery portion of the fiber
bundle collecting device 11 is not restricted to the construction equipped with thenip roller pair 16. For example, as shown inFig. 4 , asuction pipe 40 with a substantially egg-shaped sectional configuration is provided, and a suction hole 40a is formed at a predetermined position of thesuction pipe 40. Then, theperforated belt 18 is slidably wrapped around the outer periphery of thesuction pipe 40 and the tension roller 41. Further, it is also possible to transmit the rotation of the fronttop roller 15 to the top niproller 20 through adrive belt 42 and to drive the top niproller 20 while keeping it in press contact with theperforated belt 18, thereby driving theperforated belt 18. - It is also possible to adopt a construction in which the
rotation shaft 19 with the bottom niproller 19a formed thereon is driven as a shaft common to all the spindles by a motor through a gear row provided at a gear end of the machine frame as in the case of thefront bottom roller 14 of thedrafting device 12. - It is also possible to provide the
perforated belt 18 on the top side. - The present invention is applicable not only to the drafting device of a fine spinning machine but also to the drafting device of some other type of spinning machine.
- The perforated belt may be endowed with an anti-static function by imparting conductivity to the yarn forming the perforated belt, and may be formed of a woven fabric or a knitted fabric with an anti-static agent applied thereto.
Claims (4)
- A fiber bundle collecting device (11) for a spinning machine which collects a fiber bundle (F) drafted by a drafting part (12), comprising:a delivery portion (16) provided on a downstream side of a final delivery roller pair (13 of the drafting part (12) and equipped with a nip roller;a sucking portion (17) having a guide surface (29b) equipped with a suction hole (29a) at least on an upstream side of a nipping point of the delivery portion (16) with respect to a moving direction of the fiber bundle (F); anda perforated belt (18) formed of a woven fabric or knitted fabric rotated while in slide contact with the guide surface (29b),characterized in that the perforated belt (18) includes thermal fusion yarns (34) with crossing portions (35), the yarns (34) being fused at the crossing portions (35) over the entire width of the perforated belt (18).
- A fiber bundle collecting device (11) for a spinning machine according to Claim 1, wherein a thermal fusion yarn (34) of a sheath/core structure is used as the yarns (34).
- A fiber bundle collecting device (11) for a spinning machine according to one of Claims 1 and 2, wherein the thermal fusion yarn (34) has a core portion (34b) and a sheath portion (34a) which are both formed of polyamide.
- A fiber bundle collecting device (11) for a spinning machine according to any one of Claims 1 through 3, wherein the perforated belt (18) is endowed with an anti-static function.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004183990A JP4419703B2 (en) | 2004-06-22 | 2004-06-22 | Fiber bundle concentrator in spinning machine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1612309A2 EP1612309A2 (en) | 2006-01-04 |
EP1612309A3 EP1612309A3 (en) | 2006-04-26 |
EP1612309B1 true EP1612309B1 (en) | 2009-09-02 |
Family
ID=35169394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05010863A Not-in-force EP1612309B1 (en) | 2004-06-22 | 2005-05-19 | Fibre condensing device for a spinning machine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1612309B1 (en) |
JP (1) | JP4419703B2 (en) |
CN (1) | CN100451196C (en) |
DE (1) | DE602005016338D1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012068692A1 (en) | 2010-11-26 | 2012-05-31 | Maschinenfabrik Rieter Ag | Drive device for a compaction device on a spinning machine |
WO2012068693A1 (en) | 2010-11-26 | 2012-05-31 | Maschinenfabrik Rieter Ag | Spinning machine comprising a compaction device |
WO2013140215A1 (en) | 2012-03-21 | 2013-09-26 | Maschinenfabrik Rieter Ag | Carrier element for a compaction device |
WO2018234912A1 (en) | 2017-06-23 | 2018-12-27 | Maschinenfabrik Rieter Ag | Compression device for a spinning machine |
WO2019034946A1 (en) | 2017-08-17 | 2019-02-21 | Maschinenfabrik Rieter Ag | Multiple nozzle junction of a textile machine, textile machine, and method for operating a textile machine |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102006051875A1 (en) * | 2006-10-31 | 2008-05-08 | Maschinenfabrik Rieter Ag | Kepa drafting system for a spinning machine |
JP2012127007A (en) * | 2010-12-13 | 2012-07-05 | Toyota Industries Corp | Draft machine in fore spinning process |
CN102605487A (en) * | 2011-09-07 | 2012-07-25 | 常熟市迅达粉末冶金有限公司 | Antistatic lattice apron for compact spinning |
CN102418175A (en) * | 2011-09-22 | 2012-04-18 | 吴江秦邦纺织有限公司 | Preparation process of lattice apron for antistatic compact spinning |
CN102418177A (en) * | 2011-09-26 | 2012-04-18 | 吴江伊兰吉纺织品有限公司 | Preparation process of wear-resistant grid circle used for compact spinning |
JP2013124432A (en) * | 2011-12-15 | 2013-06-24 | Toyota Industries Corp | Aeration transport belt of fiber bundle bundling device |
CN103469385B (en) * | 2013-09-13 | 2015-10-14 | 顾祥茂 | A kind of preparation method of Wear-resistant lattice ring for compact spinning |
JP6608649B2 (en) * | 2015-08-26 | 2019-11-20 | 日産自動車株式会社 | Porous sheet manufacturing method and porous sheet manufacturing apparatus |
DE102016106207A1 (en) * | 2016-04-05 | 2017-10-05 | Maschinenfabrik Rieter Ag | Absorbent body for a pneumatically operated fiber compression device and thus equipped spinning machine |
PT3470214T (en) * | 2017-10-10 | 2021-07-14 | Groz Beckert Kg | Device and method for the preparation of a carrier having multiple fibre bundles |
JP7180333B2 (en) * | 2018-12-04 | 2022-11-30 | 株式会社豊田自動織機 | Spinning machine fiber bundle concentrator |
DE102019113676A1 (en) * | 2019-05-22 | 2020-11-26 | Maschinenfabrik Rieter Ag | Compaction unit for a drafting system of a textile machine |
DE102019115219A1 (en) * | 2019-06-05 | 2020-12-10 | Maschinenfabrik Rieter Ag | Suction tube for a compression device and device for the pneumatic compression of a drawn fiber structure |
CN112626660B (en) * | 2020-12-25 | 2022-11-04 | 淄博银仕来纺织有限公司 | Preparation method and application of multi-component interventional spun multicolor yarn |
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DE1704429A1 (en) * | 1967-07-05 | 1972-02-17 | Lissmann Alkor Werk | Process for the production of a textile-reinforced material based on plastic |
DE3839549A1 (en) * | 1988-11-24 | 1990-05-31 | Schlatterer Gmbh & Co Kg Max | CONVEYOR BAND FOR CONVEYING A STRING OF TOBACCO |
CH693214A5 (en) * | 1998-07-14 | 2003-04-15 | Schurr Stahlecker & Grill | Apparatus for compressing a stretched fiber structure. |
DE19837183C5 (en) * | 1998-08-17 | 2010-12-30 | Spindelfabrik Suessen Gmbh | Endless conveyor belt for transporting a stretched fiber structure |
DE19837182B4 (en) * | 1998-08-17 | 2007-01-25 | Stahlecker, Fritz | Conveyor belt for transporting a fiber strand to be compacted |
DE19837181A1 (en) * | 1998-08-17 | 2000-02-24 | Stahlecker Fritz | Apparatus to condense drawn sliver has a belt to carry the sliver over a sliding surface with a suction slit to be pressed against the surface by a clamping roller |
JP2004100093A (en) * | 2002-09-10 | 2004-04-02 | Toyota Industries Corp | Fiber bundle-collecting device in spinning machine |
DE10324287A1 (en) * | 2003-05-21 | 2004-12-16 | Wilhelm Stahlecker Gmbh | Conveyance belt of silver sheet, includes grating-shaped region which is formed by intersecting and melting warp and weft mutually |
DE10325383A1 (en) * | 2003-05-30 | 2005-01-05 | J.H. Vom Baur Sohn Gmbh & Co Kg | Method for producing sieve bands for transport of fiber formations consists of producing sealed zones on an air-permeable hose and dividing these zones in two by radial cuts |
-
2004
- 2004-06-22 JP JP2004183990A patent/JP4419703B2/en not_active Expired - Fee Related
-
2005
- 2005-04-30 CN CNB2005100687363A patent/CN100451196C/en active Active
- 2005-05-19 DE DE602005016338T patent/DE602005016338D1/en active Active
- 2005-05-19 EP EP05010863A patent/EP1612309B1/en not_active Not-in-force
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012068692A1 (en) | 2010-11-26 | 2012-05-31 | Maschinenfabrik Rieter Ag | Drive device for a compaction device on a spinning machine |
WO2012068693A1 (en) | 2010-11-26 | 2012-05-31 | Maschinenfabrik Rieter Ag | Spinning machine comprising a compaction device |
WO2013140215A1 (en) | 2012-03-21 | 2013-09-26 | Maschinenfabrik Rieter Ag | Carrier element for a compaction device |
WO2018234912A1 (en) | 2017-06-23 | 2018-12-27 | Maschinenfabrik Rieter Ag | Compression device for a spinning machine |
WO2019034946A1 (en) | 2017-08-17 | 2019-02-21 | Maschinenfabrik Rieter Ag | Multiple nozzle junction of a textile machine, textile machine, and method for operating a textile machine |
Also Published As
Publication number | Publication date |
---|---|
CN100451196C (en) | 2009-01-14 |
EP1612309A2 (en) | 2006-01-04 |
CN1712587A (en) | 2005-12-28 |
DE602005016338D1 (en) | 2009-10-15 |
JP4419703B2 (en) | 2010-02-24 |
JP2006009166A (en) | 2006-01-12 |
EP1612309A3 (en) | 2006-04-26 |
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