EP0902107B1 - Machine de torsion multiple - Google Patents

Machine de torsion multiple Download PDF

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Publication number
EP0902107B1
EP0902107B1 EP98116045A EP98116045A EP0902107B1 EP 0902107 B1 EP0902107 B1 EP 0902107B1 EP 98116045 A EP98116045 A EP 98116045A EP 98116045 A EP98116045 A EP 98116045A EP 0902107 B1 EP0902107 B1 EP 0902107B1
Authority
EP
European Patent Office
Prior art keywords
traverse
driving system
speed
winding
drum
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
EP98116045A
Other languages
German (de)
English (en)
Other versions
EP0902107A3 (fr
EP0902107A2 (fr
Inventor
Keiji Kuroda
Yuhei Yamamoto
Takao Toyoshima
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.)
Murata Machinery Ltd
Original Assignee
Murata Machinery Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Murata Machinery Ltd filed Critical Murata Machinery Ltd
Publication of EP0902107A2 publication Critical patent/EP0902107A2/fr
Publication of EP0902107A3 publication Critical patent/EP0902107A3/fr
Application granted granted Critical
Publication of EP0902107B1 publication Critical patent/EP0902107B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
    • D01H7/86—Multiple-twist arrangements, e.g. two-for-one twisting devices ; Threading of yarn; Devices in hollow spindles for imparting false twist
    • 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
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/28—Driving or stopping arrangements for two or more machine elements possessing different characteristics but in operative association
    • 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
    • D01H1/10—Spinning or twisting machines in which the product is wound-up continuously for imparting multiple twist, e.g. two-for-one twisting
    • 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
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements

Definitions

  • the present invention relates a multiple twister for driving a drum for rotating a winding package and a traverse device for traversing a twisted yarn to be wound around the winding package by common driving means.
  • a yarn released from a yarn supply package is put into a spindle rotating at a high speed, and twisting is imparted while a tensile stress is imparted adequately by means of a tension device and ballooning is performed by means of a rotating disc mounted to the spindle. Then a twisted yarn is fed to a traverse device by means of a feed roller, and the yarn to be wound on a bobbin rotating in contact with a rotating drum is formed in a winding package.
  • an output of a first motor 81 driven by a command from a controller 80 is transmitted by means of a driving system comprising a plurality of pulleys, a belt, and a speed reducer to drive a spindle 82, a feed roller 83 and a drum 84.
  • a traverse device 85 is driven by the transmission of an output of a second motor 86 driven by another command from the controller 80 ,the transmission by of means of a driving system comprising a plurality of pulleys, a belt and cam box.
  • the first motor 81 for driving the drum 84 and the second motor 86 for driving the traverse device 85 independently. Therefore, if the outputs of the motors 81 and 86 each are interrupted simultaneously during stoppage of the multiple twister, the traverse device 85 having a small inertial force stops more before the drum 84 having a greater inertial force stops. As a result, if the drum 84 is continuously driven with respect to the inactive traverse device 85, there is a danger of a end missing that a twisted yarn slips off from a winding package P, or a straight winding that a twisted yarn around the winding package P is wound around one section.
  • a multiple twister as claimed in claim 1 according to the present invention, comprising a spindle driving system of a spindle apparatus for twisting a yarn, a drum driving system for rotating a winding package for winding the twisted yarn and a traverse driving system of a traverse device for traversing the twisted yarn to be wound around the winding package.
  • the spindle driving system, the drum driving system and the traverse driving system are driven by a common driving means, and the drum driving system and the traverse driving system are coupled with each other via non-step transmission for applying disturbance by making a traverse speed of the traverse device variable.
  • the traverse speed of the traverse device can be made variable by non-step transmission so as to synchronize with drum rotation.
  • the traverse speed of the traverse device is made continuously variable between high and low speeds, thereby making it possible to wind a twisted yarn while disturbing it.
  • the spindle driving system, the drum driving system and the traverse driving system are driven by the common driving means so as to certainly maintain synchronization of each driving system during general acceleration and deceleration or during deceleration at the time of electric interruption. Thereby, package quality improvement can be achieved, and cut yarn due to excessive twisting can be certainly prevented.
  • said non-step transmission as claimed in claim 1 accelerates the traverse speed of the traverse device step by step according to the winding quantity of the winding package and applies disturbance by making the traverse speed continuously variable between high and low speeds merely in a time zone in which a constant speed is achieved after acceleration.
  • the traverse speed of the traverse device is accelerated step by step, a winding angle that changes according to the winding quantity of the winding package can be corrected.
  • the traverse speed is made continuously variable between high and low speeds in a constant-speed time zone, the twisted yarn can be wound around the winding package while it is disturbed.
  • the non-step transmission as claimed in claim 1 or claim 2 is provided with a pair of pulleys coupled with each of the driving means side and the traverse driving system and an endless belt to be wound around each pulley, each pulley having a taper face following taper faces formed on both sides of the endless belt and comprising two taper bodies arbitrarily drawn together and separated from each other, one of these pulleys being provided with drawing and separating means for forcibly drawing together and separating one taper body to/from another.
  • the endless belt is changed to a diameter according that interval. Further, each taper body interval of the other pulley is changed in according therewith, and the diameter of the endless belt is changed. Therefore, the traverse speed of the traverse device can be made variable appropriately due to such change in the diameter of the endless belt.
  • said non-step transmission as claimed in any one of claims 1 to 3 is provided with a reversible motor, a sensor for detecting a traverse speed, and a controller, the controller applying disturbance by switching forward and backward rotation of the reversible motor according to the detected traverse speed.
  • Figure 1 is a schematic view showing a multiple twister.
  • Figure 2 is an enlarged view showing a structure of a non-step transmission employed for the multiple twister.
  • Figure 3 is a graph showing traversing operation of a traverse device of the multiple twister.
  • Figure 4 is a graph showing a relationship between a winding angle and a time of the traverse device of the multiple twister.
  • Figure 5 is a schematic view showing a conventional multiple twister.
  • a multiple twister 1 is provided with one spindle unit formed of a spindle apparatus 2 and a winding apparatus 3 positioned on the spindle apparatus 2, and is disposed in horizontal array on the back to form 80 to 304 spindle units as a whole.
  • This multiple twister 1 is provided with the devices 2 and 3, a driving motor 5 (driving means), a spindle driving system A driven by the driving motor 5, a drum driving system B and a traverse driving system C both of which are driven by the driving motor 5 and a controller 6.
  • the spindle apparatus 2 comprises a cover 7 where a yarn supply package is loaded and a spindle 8 coupled with the spindle driving system A.
  • a winding apparatus 4 comprises a drum 9 with which a winding package P is pressed and a feed roller 10 and which are driven by the drum driving system B and a traverse device 11 traversed by a traverse driving system C.
  • the driving motor 5 is an induction motor and is driven by a rotation speed determined by an output frequency from an inverter (not shown in the drawin) connected to the controller 6 to drive the spindle driving system A and to drive the drum driving systems B and the traverse driving system C via a speed change belt device 12, a speed reducer 13 and a non-step transmission 14.
  • the spindle driving system A has a belt 19 wound around a first pulley 15 provided at an output shaft of the driving motor 5 and a second pulley 16 of a shaft 21 provided in parallel to the driving motor 5, and a tangential belt 20 is wound between a third pulley 17 of the shaft 21 and a fourth pulley 18.
  • the tangential belt 20 is transferred in contact with the spindle 8 of each spindle apparatus 2, and driving of the driving motor 5 is transmitted to each spindle 8 by means of each of the pulleys 15 to 18 and a belt 19 and then is rotated.
  • the drum driving system B has a belt 28 wound around a fifth pulley 22 provided at an output shaft between the driving motor 5 and the first pulley 15 and a sixth pulley 23 of a shaft 27 provided in parallel to the shaft 21.
  • the shaft 21 is coupled with the speed reducer 13 via a belt 29 wound around seventh and eighth pulleys 24 and 25 of the speed change belt device 12 (no-step transmission).
  • the speed reducer 13 has a plurality of gears disposed therein and these gears are decelerated by inputting rotational force from an input shaft 30 provided with the eighth pulley 25 of the speed change belt device 12. At the same time, a rotational direction is changed.
  • the speed reducer 13 has three output shafts 31a to 31c and is a three-shaft output by a single-shaft input.
  • a ninth pulley 26 is engagingly mounted to each of the parallel two output shafts 31a and 31b, and the traverse driving system C is coupled with the remaining output shaft 31c.
  • a belt 36 is wound around each of the ninth pulley 26, a tenth pulley 33 engagingly mounted to a support shaft 32, and an eleventh pulley 35 engagingly mounted to a support shaft 34.
  • the drum 9 is engagingly mounted to the support shaft 32 with a given interval
  • the feed roller 10 is engagingly mounted to the support shaft 34 with a given interval.
  • the outputs of the driving motor 5 are transmitted to the support shafts 32 and 34 of the drum 9 and the feed roller 10, respectively, via the belt 28, the speed change belt device 12, the speed reducer 13 and the belt 36.
  • the traverse driving system C has the non-step transmission 14 coupled with the speed reducer 13 and the non-step transmission 14 is continuous to a cam box 40.
  • the cam box 40 has a gear 42 at a transmission shaft 41 coupled with the non-step transmission 14 and is provided with a grooved drum 44 coupled with a gear 43 to be geared with the gear 42.
  • the grooved drum 44 is formed of a spiral-pattern cam groove 45 and a cam shoe 46 is engaged with the cam groove 45.
  • a reciprocating rod 47 is secured to the cam shoe 46, and the transverse device 11 is secured to the reciprocating rod 47 with a given interval.
  • An output of the driving motor 5 is transmitted from the non-step transmission 14 to the grooved drum 44 of the cam box 40 via the speed change belt device 12 and the speed reducer 13, the cam shoe 46 is moved along the cam groove 45 by rotation of the grooved drum 44, and thereby the traverse device 11 is reciprocated and traversed.
  • the controller 6 is connected to the driving motor 5, an input board 60, a reversible motor 53 (drawing and separating means) of the non-step transmission 14, a control motor 61 of the speed change belt device 12, a drum proximity sensor 62 and a traverse proximity sensor 63, respectively.
  • the input board 60 inputs to the controller 6 data such as conditions of the traverse device 11 (winding angle ⁇ , traverse speed v and disturbance swing width h), number of twists N, rotation speed of the spindle and rotation speed of the drum 9.
  • the proximity sensor 62 detects rotation of a target body 64 of the shaft 32 to monitor an actual rotation speed of the drum 9 and outputs it to the controller 6.
  • the proximity sensor 63 detects rotation of a target body 65 of the grooved drum 44 to monitor the winding angle ⁇ and the traverse speed v of the traverse device 11 and outputs it to the controller 6.
  • the controller 6 controls driving of the driving motor 5, the reversible motor 53 and the control motor 61 by means of data inputted from the input board 60 and detection fed back from each of the proximity sensors 62 and 63.
  • the non-step transmission 14 comprises an input side pulley 50 provided at an output shaft 31c of the speed reducer 13, an output side pulley 51 provided at a transmission shaft 41 of the cam box 40, an endless belt 52 wound between the pulleys 50 and 51, and the reversible motor (forward and backward rotation motor).
  • the pulleys 50 and 51 comprises outer and inner washers (taper bodies) 54 and 55, and the insides of the washers 54 and 55 are formed on taper faces, respectively.
  • a holder is securely mounted to the inner washer 55 of the input side pulley 50.
  • An output shaft 56 of the reversible motor 53 is coupled with the holder via a clutch 57 and the inner washer 55 of the input side pulley 50 is axially moved to the outer washer 54 fixed to the output shaft 31c by forward and backward rotation of the motor 53.
  • the outer washer 55 of the output side pulley 51 is provided with a spring box 58.
  • a biasing spring 59 biasing the outer washer 55 toward the inner washer 55 fixed to the transmission shaft 41 is disposed inside of the spring box 58.
  • the endless belt 52 having taper faces on both ends following the taper faces of the washers 54 and 55 are wound around each of the pulleys 50 and 51.
  • the winding diameter of the endless belt 52 of the input side pulley 51 decreases. Accordingly, the outer washer 54 of the output side pulley 51 is moved by spring force of the biasing spring 59 so as to narrow an interval and a distance with respect to the inner washer 55. Therefore, the winding diameter of the endless belt 52 of the output side pulley 51 increases.
  • the non-step transmission 14 changes a rotation speed output from the output side pulley 51 to the cam box 40 and varies the traverse speed of the traverse device 11 via the cam box 40 by changing the winding diameter of the endless belt 52 with respect to each of the pulleys 50 and 51 through forward and backward rotation of the reversible motor 53.
  • the multiple twister 1 of the present invention is constructed as described above. Now, an operation of multiple twister 1 will be described.
  • the controller 6 receives data such as spindle rotation speed, drum rotation speed, winding angle ⁇ and traverse speed v with respect to the traverse device 11, and disturbance width h of the twisted yarn and so on from the input board 60, and drives the driving motor 5 based on these data.
  • the driving motor 5 When the driving motor 5 is driven, its output is transmitted to the spindle apparatus 11 via the spindle driving system A.
  • the yarn to be released from a yarn supply package enters a tension device (not shown in the drawings), a given tensile stress is imparted. Then, the yarn is ballooned on a rotating disc of the spindle 8 rotating at a high speed and reaches a balloon guide. One twist is applied from the tension device to the rotating disc, and another twist is applied from the rotating disc to the balloon guide and reaches the feed roller 10.
  • An output of the driving motor 5 is transmitted via the drum driving system B and the traverse driving system C, the feed roller 10 and the drum 9 is rotated, and the traverse device 11 is traversed. Thereby, the twisted yarn from the spindle apparatus 2 reaching the feed roller 10 is wound around the winding package P pressed by the drum 9 traversed by the traverse device 11.
  • the traverse device 11 winds such yarn depending on the traverse speed v and the disturbance width h shown in Figure 3 and depending on a winding angle ⁇ shown in Figure 4. That is, the traverse conditions of the traverse device 11 is determined by controlling the non-step transmission 14 based on information such as the winding angle ⁇ due to the proximity sensor 63 continuously fed back to the controller 6 and the traverse speed v.
  • One period of the winding angle in Figure 4 corresponds to that of disturbance in Figure 3, and disturbance is performed for the winding angle to swing at a width of 7%.
  • the pulleys 50 and 51 of the reversible motor 53 of the no-step transmission 14 are fixed.
  • the traverse speed v of the traverse device 11 is accelerated from the beginning of driving of the driving motor 5 to a time t1 while a constant speed relationship with respect to the drum 9 is maintained.
  • the reversible motor 53 of the non-step transmission 14 is rotated forward and backward at time t2 at which a constant speed is achieved.
  • a diameter of each of the pulleys 50 and 51 is increased and decreased with respect to the endless belt 52, the traverse speed v of the traverse device 11 is made constantly variable within a certain range between low and high speeds, and thereby the twisted yarn Y is wound around the winding package P while it is disturbed at a width h, as shown in Figure 3.
  • the traverse speed v of the traverse device 11 is accelerated step by step, and the yarn is disturbed merely in time zones t2, t3, t4... at which a contact speed is achieved after acceleration.
  • a yarn is disturbed merely in time zones t2, t3, t4... at which a constant speed other than acceleration is achieved because it is difficult to make it variable between high and low speeds for disturbance while the traverse speed v is accelerated step by step by means of the non-step transmission 14.
  • the winding angle ⁇ changing according to a winding quantity of the twisted yarn Y to be wound around the winding package P can be corrected to the setting, and a ribbon can be prevented from being produced at the winding package P due to disturbance.
  • the controller 6 is employed by controlling the non-step transmission 14 using the procedure similar to that shown in Figure 3 based on an a actual rotation speed of the drum 9 fed back from the proximity sensor 62. Further, the reversible motor 53 of the non-step transmission 14 is rotated forward and backward, the diameter of the endless belt 52 is increased or decreased with respect to each of the pulleys 50 and 51, and thereby the traverse speed v of the traverse device 11 is decelerated and is synchronized with rotation of the drum 9 while a constant speed relationship is maintained.
  • the drum driving system of the drum rotating a winding package is coupled with the traverse driving system of the traverse device traversing the twisted yard to be wound around the winding package via the non-step transmission and is driven by common driving means.
  • the traverse speed of the traverse device is made variable so as to synchronize with rotation of the drum, therefore, the traverse device and the drum can be stopped simultaneously, thereby making it possible to prevent the end missing or the straight winding during stoppage.
  • the traverse speed of the traverse device is accelerated step by step according to a winding quantity of the winding package, and the traverse speed is made continuously variable between high and low speeds merely in a time zone at which a constant speed is achieved after acceleration.
  • the winding angle varied by a winding quantity of a twisted yarn due to the winding package can be corrected, and the twisted yarn can be wound while it is disturbed. Therefore, a ribbon of the winding package around which a twisted yarn is wound is prevented from being generated, thereby making it possible to provide a good-quality winding package.
  • said non-step transmission comprises the endless belt, a plurality of pulleys comprising two taper bodies that drawn together and separated from each other arbitrarily, and drawing and separating means for forcibly drawing together and separating each of the taper bodies of one pulley.
  • drawing and separating means for forcibly drawing together and separating each of the taper bodies of one pulley.
  • the taper face of the pulley can be brought into contact with the taper faces on both sides of the endless belt, slippage is reduced even if tensile stress of the endless belt is weak, the service life of the endless belt is extended, and power transmission precision is enhanced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Winding Filamentary Materials (AREA)

Claims (4)

  1. Machine de torsion multiple (1) comprenant : un système d'entraínement de broches (A) d'un appareil à broches (2) pour tordre un fil ; un système d'entraínement de tambour (B) pour faire tourner une bobine d'enroulement (P) pour enrouler un fil tordu ; et un système d'entraínement en va-et-vient (C) d'un dispositif de déplacement en va-et-vient pour faire traverser le fil tordu pour être enroulé autour de la bobine d'enroulement (P), le système d'entraínement de brochess (A), le système d'entraínement de tambour (B) et le système d'entraínement en va-et-vient (C) étant entraínés par un moyen d'entraínement commun, le système d'entraínement de tambour (B) et le système d'entraínement en va-et-vient (C) étant couplés l'un avec l'autre par une transmission sans à-coups pour appliquer une perturbation en rendant la vitesse de va-et-vient du dispositif de déplacement en va-et-vient (11) variable.
  2. Machine de torsion multiple selon la revendication 1, où la transmission sans à-coups accélère une vitesse de va-et-vient du dispositif de déplacement en va-et-vient coup par coup selon une quantité d'enroulement d'une bobine d'enroulement, et une vitesse de va-et-vient est rendue continuellement variable entre des vitesses élevée et basse uniquement dans une zone de temps dans laquelle une vitesse constante est atteinte après l'accélération pour appliquer la perturbation.
  3. Machine de torsion multiple selon la revendication 1 ou la revendication 2, où la transmission sans à-coups présente une paire de poulies couplées avec chacun du côté de moyen d'entraínement et du système d'entraínement en va-et-vient et une courroie sans fin destinée à être enroulée autour de chaque poulie, chaque poulie comprend deux corps coniques présentant respectivement une face conique suivant l'une des faces coniques formées sur les deux côtés de la courroie sans fin qui sont tirés l'un contre l'autre et séparés l'un de l'autre, et l'une de ces poulies présente un moyen de traction et de séparation pour rapprocher de force et séparer chaque corps conique.
  4. Machine de torsion multiple selon l'une des revendications 1 à 3, où la transmission sans à-coups présente un moteur réversible, un capteur pour détecter une vitesse de va-et-vient et un dispositif de commande, le dispositif de commande appliquant la perturbation en commutant vers l'avant et vers l'arrière une rotation du moteur réversible selon une vitesse de va-et-vient détectée.
EP98116045A 1997-09-09 1998-08-25 Machine de torsion multiple Expired - Lifetime EP0902107B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP24362897 1997-09-09
JP243628/97 1997-09-09
JP9243628A JPH1181054A (ja) 1997-09-09 1997-09-09 多重撚糸機

Publications (3)

Publication Number Publication Date
EP0902107A2 EP0902107A2 (fr) 1999-03-17
EP0902107A3 EP0902107A3 (fr) 2000-01-26
EP0902107B1 true EP0902107B1 (fr) 2003-04-09

Family

ID=17106660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98116045A Expired - Lifetime EP0902107B1 (fr) 1997-09-09 1998-08-25 Machine de torsion multiple

Country Status (5)

Country Link
EP (1) EP0902107B1 (fr)
JP (1) JPH1181054A (fr)
KR (1) KR100382401B1 (fr)
CN (1) CN1215208C (fr)
DE (1) DE69813122T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101404204B (zh) * 2008-07-09 2010-09-29 方安林 自动捻线头机

Families Citing this family (9)

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KR100486039B1 (ko) * 2002-06-07 2005-05-03 이화공업주식회사 투포원 연사기의 전자구동 시스템 및 그 구동제어방법
JP4731994B2 (ja) * 2005-05-18 2011-07-27 Ｔｍｔマシナリー株式会社 トラバース装置の駆動構造
CN101209787B (zh) * 2007-12-25 2012-05-23 天津工业大学 一种密封毛条卷绕装置
CN103103639B (zh) * 2013-02-25 2015-09-09 无锡市华文机电有限公司 两用化纤倍捻机
CN104451974A (zh) * 2013-09-18 2015-03-25 苏州英迈杰机械有限公司 倍捻机传动机构
CN104726972B (zh) * 2015-01-28 2017-02-22 上海兰宝传感科技股份有限公司 玻纤捻线机的电机驱动系统
CN106149112B (zh) * 2015-03-27 2018-05-04 常州市同和纺织机械制造有限公司 环锭纺纱机牵伸传动装置
CN107034559B (zh) * 2017-05-27 2022-08-05 杭州长翼纺织机械有限公司 一种复合捻线机
CN109972431B (zh) * 2019-03-20 2024-01-30 江苏兴达钢帘线股份有限公司 一种捻股机机床刹车制动系统

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5945582B2 (ja) * 1980-03-03 1984-11-07 村田機械株式会社 捲取機に於けるリボン捲防止装置
US5174102A (en) * 1987-05-09 1992-12-29 Murata Kikai Kabushiki Kaisha Twist number setting device for a two-for-one twister

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101404204B (zh) * 2008-07-09 2010-09-29 方安林 自动捻线头机

Also Published As

Publication number Publication date
KR19990029663A (ko) 1999-04-26
JPH1181054A (ja) 1999-03-26
CN1215208C (zh) 2005-08-17
DE69813122D1 (de) 2003-05-15
EP0902107A3 (fr) 2000-01-26
EP0902107A2 (fr) 1999-03-17
DE69813122T2 (de) 2004-03-11
CN1210909A (zh) 1999-03-17
KR100382401B1 (ko) 2003-07-18

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