EP1077277B1 - Method of controlling the movement of the slay of a loom, particularly of a terry loom - Google Patents

Method of controlling the movement of the slay of a loom, particularly of a terry loom Download PDF

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Publication number
EP1077277B1
EP1077277B1 EP00109782A EP00109782A EP1077277B1 EP 1077277 B1 EP1077277 B1 EP 1077277B1 EP 00109782 A EP00109782 A EP 00109782A EP 00109782 A EP00109782 A EP 00109782A EP 1077277 B1 EP1077277 B1 EP 1077277B1
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EP
European Patent Office
Prior art keywords
reversal
sley
shaft
sley shaft
rotation direction
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Expired - Lifetime
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EP00109782A
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German (de)
French (fr)
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EP1077277A1 (en
Inventor
Valentin Krumm
Stefan Kimmel
Rainer Finger
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Lindauer Dornier GmbH
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Lindauer Dornier GmbH
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Publication of EP1077277A1 publication Critical patent/EP1077277A1/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/22—Terry looms
    • D03D39/226—Sley control
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/22—Terry looms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/60—Construction or operation of slay
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/60—Construction or operation of slay
    • D03D49/64—Construction or operation of slay wherein the slay dwells or moves slowly while the weft is being inserted

Definitions

  • the invention relates to a method for controlling the movement sequence of the sley shaft, which is derived from at least one operatively connected to the main drive shaft of the loom cam and transmitted via scanning means on the sley shaft of the loom.
  • the movement sequence of the sley shaft is described by a curve corresponding to a detent-in-reverse function.
  • the object is achieved in that the cam driving the shaft is driven by a variable in its speed drive, in such a way that the shaft has a higher rotational speed when the sley from its position at the edge of the goods is performed in the rear position or from the rear position to the edge of the goods, as when the sley is still due to the design of the cam, ie in the field of shop rest.
  • the object of the invention is therefore, regardless of whether the eccentric driving shaft is connected to a controllable in its speed or not controllable drive at a constant angular velocity of the eccentric disc driving shaft, the sley or the reed between a first end position and a second end position to give a movement, after which the reed performs a movement after a rest position, which ensures an undisturbed Florsentefrac to achieve a high quality terry toweling.
  • the object is solved by the features of the independent claim.
  • Essential features are that the angular velocity of the sley shaft after leaving a detent position, which corresponds approximately to the rear end position of the sley and thus also the rear end position of the reed, brought to a speed maximum within more than one degree of rotation of the cam and that then the angular velocity of the sley shaft is discontinuously delayed until the front end position of the sley, which corresponds to a reversal of direction of the sley shaft.
  • Such a speed profile of the sley shaft means that the angular speed of the sley shaft after reaching the maximum speed, which is preferably achieved within less than 160 degrees of rotation of the total rotation angle of the cam, the speed continuously until a first before the reversal of direction in the front reversing position of the sley shaft is delayed such that the pile forming weft group is detected with reduced angular velocity of the sley shaft and subsequently the weft thread group in a second continuous deceleration phase following the first deceleration phase and reaching the direction of reversal of the sley shaft, to the stop edge of the fabric is beaten.
  • the process according to the invention has the following advantageous effects mentioned.
  • FIG 1 the speed profile of the sley shaft of a terry machine according to the prior art is shown.
  • the sley shaft is in a first or second rotational reversing position, with the first reversing position corresponding to the rear weaving position and the second reversing position to the front weaving position or garment position.
  • the first reversing position corresponding to the rear weaving position and the second reversing position to the front weaving position or garment position.
  • the sley shaft After the sley shaft has reached the first reversing position, this remains in a locking position for the purpose of weft insertion.
  • the sley shaft is accelerated to a maximum speed and then continuously decelerated until the sheet stop to a speed of 0 1 / s.
  • the weft thread group entered into a shed is entrained by the reed at a relatively high speed of about 20 l / s and struck against the fabric edge of the fabric.
  • the entrainment of the weft thread group through the reed leads at the high speed mentioned to the disadvantages described above.
  • FIG. 2 shows the speed profile of the sley shaft of a terry loom according to the invention.
  • the sley shaft After the sley shaft has reached the first reversing position, this remains in a locking position for the purpose of weft insertion. Subsequently, the sley shaft is accelerated to a maximum speed, which is in the curve for example at about 23 1 / s. After the maximum velocity, a discontinuous velocity delay occurs until the sheet stops.
  • the velocity delay according to the invention consists of two delay phases, namely a first delay phase, which ends at about 13 1 / s. With this delayed speed, the weft thread group is detected by the reed and struck with further delay to the sheet stop, with speed equal to 0 1 / s, to the web edge.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

The method involves rotating sley shaft at maximum angular velocity, at the time of starting. Velocity reduction is carried out in steps. Slowdown step is completed before retreat. The weft yarn reaches textile edge at the point of reversal.

Description

Die Erfindung betrifft ein Verfahren zur Steuerung des Bewegungsablaufs der Webladenwelle, der von wenigstens einer mit der Hauptantriebswelle der Webmaschine wirkverbundenen Kurvenscheibe abgeleitet und über abtastende Mittel auf die Webladenwelle der Webmaschine übertragen wird.
Der Bewegungsablauf der Webladenwelle wird dabei durch eine Kurve beschrieben, die einer Rast-in-Umkehrfunktion entspricht.The invention relates to a method for controlling the movement sequence of the sley shaft, which is derived from at least one operatively connected to the main drive shaft of the loom cam and transmitted via scanning means on the sley shaft of the loom.
The movement sequence of the sley shaft is described by a curve corresponding to a detent-in-reverse function.

Bekannt ist aus DE 41 11 405 C2 ein Antrieb für die Ladenbewegung einer Webmaschine mittels einerseits an der Weblade und andererseits am Ständer angelenkten Kniehebeln, die durch eine einen Exzentertrieb bildende Kurvenscheibe bewegbar sind.
Dem bekannten Antrieb liegt die Aufgabe zugrunde, auch bei großen Webmaschinen eine hohe Arbeitsgeschwindigkeit zu erreichen, ohne auf die ausreichende Zeitspanne der Ladenruhe verzichten zu müssen.It is known from DE 41 11 405 C2 a drive for the loading movement of a loom by means of one hand on the sley and on the other hand hinged on the stand toggle levers, which are movable by an eccentric forming cam.
The well-known drive is based on the task of achieving a high operating speed even in large weaving machines, without having to do without the sufficient period of store rest.

Gemäß der vorbekannten DE 41 11 405 C2 wird die Aufgabe dadurch gelöst, dass die die Kurvenscheibe antreibende Welle durch einen in seiner Drehzahl regelbaren Antrieb angetrieben ist, und zwar derart, dass die Welle eine höhere Umdrehungsgeschwindigkeit besitzt, wenn die Weblade aus ihrer Stellung am Warenrand in die hintere Stellung bzw. aus der hinteren Stellung zum Warenrand geführt wird, als dann, wenn die Weblade aufgrund der Ausgestaltung der Kurvenscheibe still steht, d.h. in dem Bereich der Ladenruhe ist.
Nach dem Stand der Technik ist also wesentlich, dass die die Kurvenscheibe antreibende Welle von einem in seiner Drehzahl regelbaren Antrieb angetrieben ist und dass aufgrund der Antriebsregelung, unter Aufrechterhaltung einer notwendigen Rastzeit der Weblade, die Zeitspanne für den Vor- und Rücklauf der Weblade verkürzt werden kann.According to the previously known DE 41 11 405 C2, the object is achieved in that the cam driving the shaft is driven by a variable in its speed drive, in such a way that the shaft has a higher rotational speed when the sley from its position at the edge of the goods is performed in the rear position or from the rear position to the edge of the goods, as when the sley is still due to the design of the cam, ie in the field of shop rest.
According to the prior art, it is therefore essential that the shaft driving the cam is driven by a variable speed drive and that due to the drive control, while maintaining a necessary resting time of the batten, the time required for the forward and return of the batten can be shortened.

Bei der Herstellung von Florgewebe wirkt sich ein solcher Bewegungsablauf der Weblade schädlich auf den Florbildeprozess aus, weil das mit relativ hoher Geschwindigkeit auf eine Schussfadengruppe auftreffende Webblatt, das mit der Weblade verbunden ist, zwangsläufig ein sanftes Mitnehmen der Schussfadengruppe zur Anschlagkante des Gewebes nicht erreicht. Die Folge der relativ hohen Webblattgeschwindigkeit in Richtung des Gewebe- oder Warenrandes ist, dass die zu Schlingen aufzustellenden Polkettfäden zumindest teilweise aus der Schussfadengruppe gezogen werden. Dadurch entstehen unterschiedlich hohe Schlingen.
In einem nachfolgenden Schervorgang können niedrig ausgebildete Schlingen nicht von den Schermessern erfasst werden, so das kein gleichmäßig erscheinendes Warenbild entsteht, was auch gleichermaßen für das herzustellenden Florgewebe an sich gilt.
Weitere nachteilige Folgen des mit relativ hoher Geschwindigkeit auf die Schussfadengruppe auftreffenden Webblattes sind häufig auftretende Kettbrüche sowohl in der Grundkette als auch in der Florkette.In the production of pile fabric, such a movement of the batten harmful to the Florbildeprozess, because the relatively high speed incident on a weft thread reed, which is connected to the sley, inevitably does not reach a gentle entrainment of the weft group to the stop edge of the fabric. The consequence of the relatively high weaving reed speed in the direction of the fabric or fabric edge is that the pile warp threads to be set up to be loops are at least partially pulled out of the weft thread group. This results in different levels of slings.
In a subsequent Schervorgang low trained loops can not be detected by the Schermessern, so that no uniform appearing fabric image is formed, which also applies equally to the produced pile fabric itself.
Other adverse consequences of the relatively high velocity impacting the weft group reed are frequently occurring warp breaks both in the base chain and in the pile warp.

Aufgabe der Erfindung ist es deshalb, unabhängig davon, ob die die Exzenterscheibe antreibende Welle mit einen in seiner Drehzahl regelbaren oder nicht regelbaren Antrieb verbunden ist, bei konstanter Winkelgeschwindigkeit der die Exzenterscheibe antreibenden Welle, der Weblade bzw. dem Webblatt zwischen einer ersten Endstellung und einer zweiten Endstellung einen Bewegungsablauf zu verleihen, wonach das Webblatt nach einer Rastposition einen Bewegungsablauf ausführt, der einen ungestörten Florbildeprozess zum Erzielen einer qualitativ hochwertigen Frottierware gewährleistet.The object of the invention is therefore, regardless of whether the eccentric driving shaft is connected to a controllable in its speed or not controllable drive at a constant angular velocity of the eccentric disc driving shaft, the sley or the reed between a first end position and a second end position to give a movement, after which the reed performs a movement after a rest position, which ensures an undisturbed Florbildeprozess to achieve a high quality terry toweling.

Erfindungsgemäß wird die Aufgabe durch die Merkmale des unabhängigen Patentanspruchs gelöst.
Wesentliche Merkmale sind dabei, dass die Winkelgeschwindigkeit der Webladenwelle nach dem Verlassen einer Rastposition, die etwa der hinteren Endstellung der Weblade und damit auch der hinteren Endstellung des Webblattes entspricht, innerhalb von mehr als einem Drehwinkelgrad der Kurvenscheibe auf ein Geschwindigkeitsmaximum gebracht wird und dass daraufhin die Winkelgeschwindigkeit der Webladenwelle diskontinuierlich bis zur vorderen Endstellung der Weblade, die einer Drehrichtungsumkehr der Webladenwelle entspricht, verzögert wird. Ein solcher Geschwindigkeitsverlauf der Webladenwelle bedeutet erfindungsgemäß, dass die Winkelgeschwindigkeit der Webladenwelle nach dem Erreichen des Geschwindigkeitsmaximums, das vorzugsweise innerhalb von weniger als 160 Drehwinkelgraden des Gesamtdrehwinkels der Kurvenscheibe erreicht ist, die Geschwindigkeit kontinuierlich bis zu einem ersten vor der Drehrichtungsumkehr in der vorderen Umkehrposition der Webladenwelle liegenden Punkt derart verzögert wird, dass die der Florbildung dienende Schussfadengruppe mit reduzierter Winkelgeschwindigkeit der Webladenwelle erfasst wird und nachfolgend die Schussfadengruppe in einer zweiten kontinuierlich verlaufenden Verzögerungsphase, die der ersten Verzögerungsphase folgt, und die bis zur Drehrichtungsumkehr der Webladenwelle reicht, an die Anschlagkante des Gewebes geschlagen wird.According to the invention the object is solved by the features of the independent claim.
Essential features are that the angular velocity of the sley shaft after leaving a detent position, which corresponds approximately to the rear end position of the sley and thus also the rear end position of the reed, brought to a speed maximum within more than one degree of rotation of the cam and that then the angular velocity of the sley shaft is discontinuously delayed until the front end position of the sley, which corresponds to a reversal of direction of the sley shaft. Such a speed profile of the sley shaft according to the invention means that the angular speed of the sley shaft after reaching the maximum speed, which is preferably achieved within less than 160 degrees of rotation of the total rotation angle of the cam, the speed continuously until a first before the reversal of direction in the front reversing position of the sley shaft is delayed such that the pile forming weft group is detected with reduced angular velocity of the sley shaft and subsequently the weft thread group in a second continuous deceleration phase following the first deceleration phase and reaching the direction of reversal of the sley shaft, to the stop edge of the fabric is beaten.

Mit dem erfindungsgemäßen Verfahren sind die nachfolgend vorteilhaft genannten Wirkungen verbunden.The process according to the invention has the following advantageous effects mentioned.

Neben einem qualitativ hochwertigen Warenbild ergeben sich maschinenseitige Vorteile der Gestalt, dass auf eine Steuerung der Tänzerwelle, die die Polkettspannung aufrechterhält, verzichtet werden kann, weil der erfindungsgemäße Verfahrensablauf eine höhere Kettspannung in der Polkette erlaubt. In diesem Zusammenhang kann auf weitere Zusatzeinrichtungen, wie z.B. ein sogenanntes Lamellen-Unterstellbrett verzichtet werden, weil die Kettspannung der Polkettfäden hinreichend erhöht werden kann und damit die Lamellen des Kettwächters keiner Unterstützung bedürfen. Außerdem ist aufgrund der einheitlichen Florhöhe der im Scherprozess anfallende Abfall geringer als bei unterschiedlichen Florhöhen.In addition to a high-quality product appearance, there are machine-side advantages of the shape that can be dispensed with a control of the dancer shaft, which maintains the Polkettspannung, because the inventive method allows a higher warp tension in the pile chain. In this connection, further options, such as e.g. a so-called lamella-Unterstellbrett be waived because the warp tension of the pile warp threads can be sufficiently increased and thus the lamellae of the warden need no support. In addition, due to the uniform pile height of the resulting waste in the shearing process is lower than at different pile heights.

In der Zeichnung ist der erfindungsgemäße Verlauf der Drehwinkelgeschwindigkeit der Webladenwelle in Form einer Kurve dargestellt.In the drawing, the inventive profile of the rotational angular velocity of the sley shaft is shown in the form of a curve.

Auf der Abszisse ist der Drehwinkel der Kurvenscheibe und auf der Ordinate die Winkelgeschwindigkeit der Webladenwelle aufgetragen.On the abscissa is the angle of rotation of the cam and on the ordinate the Angular velocity of the sley shaft applied.

In Figur 1 ist der Geschwindigkeitsverlauf der Webladenwelle einer Frottierwebmaschine nach dem Stand der Technik dargestellt.
Bei einer Winkelgeschwindigkeit von 0 1/s befindet sich die Webladenwelle in einer ersten oder zweiten Drehrichtungs-Umkehrposition, wobei die erste Umkehrposition der hinteren Webblattstellung und die zweite Umkehrposition der vorderen Webblattstellung oder Warenrandstellung entspricht.
Nachdem die Webladenwelle die erste Umkehrposition erreicht hat, verharrt diese in einer Rastposition zum Zwecke des Schussfadeneintrags. Nachfolgend wird die Webladenwelle bis zu einem Geschwindigkeitsmaximum beschleunigt und anschließend kontinuierlich bis zu dem Blattanschlag auf eine Geschwindigkeit von 0 1/s verzögert. Während der Verzögerung wird die in ein Webfach eingetragene Schussfadengruppe zur Florbildung bei einer relativ hohen Geschwindigkeit von etwa 20 1/s durch das Webblatt mitgenommen und an den Warenrand des Gewebes angeschlagen.
Die Mitnahme der Schussfadengruppe durch das Webblatt führt bei der genannten hohen Geschwindigkeit zu den vorstehend geschilderten Nachteilen.In Figure 1, the speed profile of the sley shaft of a terry machine according to the prior art is shown.
At an angular velocity of 0 1 / s, the sley shaft is in a first or second rotational reversing position, with the first reversing position corresponding to the rear weaving position and the second reversing position to the front weaving position or garment position.
After the sley shaft has reached the first reversing position, this remains in a locking position for the purpose of weft insertion. Subsequently, the sley shaft is accelerated to a maximum speed and then continuously decelerated until the sheet stop to a speed of 0 1 / s. During deceleration, the weft thread group entered into a shed is entrained by the reed at a relatively high speed of about 20 l / s and struck against the fabric edge of the fabric.
The entrainment of the weft thread group through the reed leads at the high speed mentioned to the disadvantages described above.

Figur 2 zeigt den erfindungsgemäßen Geschwindigkeitsverlauf der Webladenwelle einer Frottierwebmaschine.
Nachdem die Webladenwelle die erste Umkehrposition erreicht hat, verharrt diese in einer Rastposition zum Zwecke des Schussfadeneintrags. Nachfolgend wird die Webladenwelle bis zu einem Geschwindigkeitsmaximum beschleunigt, das in der Kurve beispielsweise bei etwa 23 1/s liegt. Nach dem Geschwindigkeitsmaximum tritt eine diskontinuierliche Geschwindigkeitsverzögerung bis zum Blattanschlag ein.
Die Geschwindigkeitsverzögerung besteht erfindungsgemäß aus zwei Verzögerungsphasen, und zwar einer ersten Verzögerungsphase, die bei etwa 13 1/s endet. Mit dieser verzögerten Geschwindigkeit wird die Schussfadengruppe vom Webblatt erfasst und unter weiterer Verzögerung bis zum Blattanschlag, mit Geschwindigkeit gleich 0 1/s, an die Warenkante angeschlagen.FIG. 2 shows the speed profile of the sley shaft of a terry loom according to the invention.
After the sley shaft has reached the first reversing position, this remains in a locking position for the purpose of weft insertion. Subsequently, the sley shaft is accelerated to a maximum speed, which is in the curve for example at about 23 1 / s. After the maximum velocity, a discontinuous velocity delay occurs until the sheet stops.
The velocity delay according to the invention consists of two delay phases, namely a first delay phase, which ends at about 13 1 / s. With this delayed speed, the weft thread group is detected by the reed and struck with further delay to the sheet stop, with speed equal to 0 1 / s, to the web edge.

Versuche haben gezeigt, dass eine solche diskontinuierlich verlaufende Geschwindigkeitsverzögerung der Webladenwelle und folglich des Webblattes auf Frottierwebmaschinen eine qualitativ hochwertige Frottierware erzeugt.Experiments have shown that such a discontinuous deceleration of speed of the sley shaft and consequently of the reed on terry looms produces a high quality terry.

Claims (5)

  1. Method for controlling the motion sequence of the sley shaft between a first and second reversal of rotation direction, the motion sequence deriving from at least one cam disc in operative connection with the main drive shaft of a loom, especially a terry loom, and being transferred by way of sensing means to the sley shaft of the loom, the motion sequence of the sley shaft describing a curve that corresponds to a "rest in reversal-function", characterised in that the angular speed of the sley shaft after a position of rest, which corresponds to the first reversal of rotation direction thereof, is brought within an angle of rotation of more than one degree of the cam disc to a maximum speed and in that thereupon the angular speed is decelerated discontinuously up to the second reversal of rotation direction of the sley shaft, namely, through a first deceleration phase, in which a group of weft threads is gripped by the weaving reed, and a second deceleration phase following the first deceleration phase, wherein the first deceleration phase terminates at a point before the second reversal of rotation direction of the sley shaft and the following deceleration phase terminates at the point of the second reversal of rotation direction.
  2. Method according to claim 1, characterised in that the maximum speed of the sley shaft is reached within an angle of rotation of less than 160°, related to the total angle of rotation of the cam disc.
  3. Method according to claim 1, characterised in that the end of the first deceleration phase coincides with the position of a group of weft threads being inserted into a shed to form a terry cloth.
  4. Method according to claim 1, characterised in that the first reversal of rotation direction of the sley shaft corresponds to the weaving reed position remote from the beat-up position of the weaving reed and the second reversal of rotation direction of the sley shaft corresponds to the beat-up position of the weaving reed.
  5. Method according to claim 1, characterised in that the speed of rotation of the cam disc is constant.
EP00109782A 1999-05-28 2000-05-09 Method of controlling the movement of the slay of a loom, particularly of a terry loom Expired - Lifetime EP1077277B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19924627A DE19924627C1 (en) 1999-05-28 1999-05-28 Method for controlling the sequence of movements of the reed shaft of a weaving machine
DE19924627 1999-05-28

Publications (2)

Publication Number Publication Date
EP1077277A1 EP1077277A1 (en) 2001-02-21
EP1077277B1 true EP1077277B1 (en) 2006-12-13

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US (1) US6230758B1 (en)
EP (1) EP1077277B1 (en)
JP (1) JP3479029B2 (en)
AT (1) ATE348207T1 (en)
DE (2) DE19924627C1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10204945B4 (en) * 2002-02-07 2006-06-14 Lindauer Dornier Gmbh Terry weaving method for forming variable loop heights and terry loom for performing the method
DE102004046649B4 (en) * 2004-09-25 2008-04-10 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Weave drive of a weaving machine
US10851481B1 (en) 2016-11-29 2020-12-01 Apple Inc. Robotic weaving equipment
CN114990765B (en) * 2022-07-06 2023-07-21 天津工业大学 Reed motion path planning and driving control method for spacer fabric

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Publication number Priority date Publication date Assignee Title
DE559886C (en) * 1930-11-25 1932-09-24 Guesken Fa J Shutter drive for looms
DE593960C (en) * 1932-12-06 1934-06-21 Franz Jos Marx Method for mechanically driving the drawer of looms
CH200343A (en) * 1936-12-19 1938-10-15 Tefag Textil Finanz Ag Loom, in particular with gripper guards and fixed weft bobbins.
DE2101720A1 (en) * 1971-01-15 1972-09-21 Emil Jäger KG, 4400 Münster Drive for the shop movement of looms
DE58901071D1 (en) * 1988-07-08 1992-05-07 Sulzer Ag FROSTING PROCESS AND WEAVING MACHINE WITH FLORDERING ORGANS.
JP2975387B2 (en) * 1990-02-01 1999-11-10 株式会社豊田自動織機製作所 Method and apparatus for driving a reed
DE4111405A1 (en) * 1991-04-09 1992-10-15 Jaeger Emil Gmbh Co Kg Loom sley drive - has speed-controlled motor to act on cam shaft to give sley more rapid movement in and out of working position
DE4122249C1 (en) * 1991-07-05 1992-09-24 Juergens Maschinenbau Gmbh & Co Kg, 4407 Emsdetten, De
DE4306612C1 (en) * 1993-03-03 1994-01-13 Dornier Gmbh Lindauer Cam drive transmission - composed of a four linkage system to set sley shaft for weaving plain or towelling fabrics in a shuttleless loom

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DE50013848D1 (en) 2007-01-25
ATE348207T1 (en) 2007-01-15
JP3479029B2 (en) 2003-12-15
DE19924627C1 (en) 2001-05-23
EP1077277A1 (en) 2001-02-21
JP2000355857A (en) 2000-12-26
US6230758B1 (en) 2001-05-15

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