EP0999991B1 - Procede de bobinage, dispositif de separation de bande et bobineuse de bande - Google Patents

Procede de bobinage, dispositif de separation de bande et bobineuse de bande Download PDF

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Publication number
EP0999991B1
EP0999991B1 EP98929372A EP98929372A EP0999991B1 EP 0999991 B1 EP0999991 B1 EP 0999991B1 EP 98929372 A EP98929372 A EP 98929372A EP 98929372 A EP98929372 A EP 98929372A EP 0999991 B1 EP0999991 B1 EP 0999991B1
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EP
European Patent Office
Prior art keywords
winding
web
mandrel
roller
winding mandrel
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
EP98929372A
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German (de)
English (en)
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EP0999991A1 (fr
Inventor
Gottlieb Looser
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.)
Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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.)
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Publication date
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Publication of EP0999991A1 publication Critical patent/EP0999991A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/26—Cutting-off the web running to the wound web roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/41419—Starting winding process
    • B65H2301/41426—Starting winding process involving suction means, e.g. core with vacuum supply

Definitions

  • the invention relates to a method for winding continuously running material web on a sequence of winding sleeves, a device for cutting the web at Changing the winding tubes, a web winding device and one Application of the procedure.
  • Web winders and web winding processes are different Known embodiments and e.g. in DE-A-2 243 504, EP-A-0 017 277, EP-A-0 394 197 and CH-A-683 992 as well as the one therein Described prior art documents.
  • the well-known winders that a relatively fast-running and more or less endless web of plastic film, Paper, textile goods or another, relatively thin (typically 10 to 1000 ⁇ m thick) and flexible material with Working widths of up to a few meters either in the course of the Production or processing of the web material continuous, i.e. without interrupting the material flow, must be wound on a sequence of winding spools that be fed to the winder from a winding spool magazine.
  • a common disadvantage of the known methods and devices is a more or less strong jerk during the wiggling process, the adverse effects on upstream, i.e. upstream manufacturing, processing or upgrading units can lead.
  • the object of the invention is to provide a winding method offer that the above disadvantages not or at most to a negligible extent.
  • the object of the invention is also an improved cutting device and a new web winder.
  • Preferred embodiments of the invention Process have those defined in claims 2 to 8 Characteristics.
  • the invention further relates to a new separation device having the features of claim 9, preferred Embodiments of this device have the features of Have claims 10-11.
  • the invention also relates to a device for Implementation of the new procedure with the characteristics of Claim 12 and in a preferred embodiment the features of claim 13.
  • DE-A-195 42 096 describes a device with comparable structure, the one used for winding Air flow but from a slot nozzle as an inject flow in the Proximity of the inflow area, i.e. in contrast to present invention with a local overpressure, is caused.
  • the invention also relates to the application of the new method for winding practically endless Sheets or strips of plastic film in the course of the Production or processing of the film.
  • winding contact means one sufficient for winding a fresh winding tube Contact between the sleeve and the by separating the new front end.
  • the speed of the air flow is preferred at least twice, especially at least three times and e.g. six times higher than the speed of typical web running speeds from 30 - 400 meters / minute or more continuously running material web.
  • Each winding roller is therefore both of the previous finished wrap as well as that of the fresh one subsequent winding connected to a central drive, the can be controlled so that the one acting on the web Tension can be kept at a desired value and is not dependent on the thickness of the respective roll.
  • the left and one of on the right side of the winder are controlled so that the left and one of on the right side of the winder.
  • the arcuate air flow is through a near the contact line between the winding roller and the this adjacent winding tube acting negative pressure, e.g. of -450 to -900 millibars.
  • the process is the formation of the arcuate Airflow supported by side inflows caused by the Pressure difference between the negative pressure applied and the ambient pressure or an atmospheric pressure from a Overpressure source are generated.
  • the material web be actuated the separator about half the circumference of the Winding sleeve bears against this.
  • the material web with the help of an inside of Vacuum roll applied negative pressure on the with openings of the roll shell provided to hold the winding roll. Further can strengthen the contact of the material web with the Winding sleeve inside the winding sleeve provided with openings a negative pressure can be applied.
  • the separating device according to the invention for a device for winding a continuously running material web on a sequence of winding cores is characterized that the separator is practically the length the winding tube has an extending vacuum channel, the with a the winding tube by at least a quarter of its circumference arcuate guide wall and a serrated knife is connected to that formed when the separation device is actuated front end of the running material web under the action an arcuate airflow that is at least about a quarter of the sleeve circumference at least approximately the width of the winding tube and up to the contact line between the winding roller and the adjacent winding tube, to bring in winding contact with the winding tube.
  • the separation device with a device for Swinging the knife into the path of the material web between a fresh winding tube lying against the winding roller and a movable guide roller, which is in a position close to the Winding sleeve is brought connected.
  • the inventive device for winding a continuously running material web on a sequence of winding sleeves has a winding roller, at least one movable one Deflection roller and a device for severing the material web, around this one onto a preceding full winding sleeve ascending web end and one for winding the following to form an empty winding tube specific end of web, and is characterized in that the separating device has a extending over the length of the winding tubes Has a vacuum channel with one around the winding tube encompassing at least a quarter of its circumference in an arc shape Guide wall and a serrated knife is connected to this when actuated the separator formed front end of the current Material web under the action of an arcuate Airflow that is at least about a quarter of the sleeve circumference at least approximately over the width of the winding tube and close to the line of contact between the winding roller and the adjacent winding tube extends with the winding tube bring in winding contact.
  • the winding roller (21) preferably has one with a Coat provided with a rubber pad, e.g. made of steel, and perforations, to by means of one prevailing inside the winding roller Vacuum an adjacent material web in reinforced To keep in touch and a practically smooth start-up operation to enable.
  • a rubber pad e.g. made of steel
  • the invention also relates to the application the new separation process for winding practically endless Sheets or strips of plastic film in the course of manufacture the film, e.g. by extrusion, or processing, e.g. by cutting, printing or other processing of the webs.
  • the term "practically endless” used here refers on web or tape lengths that are in relation to the Path or bandwidth are very large, e.g. at least around that Factor 1000 greater.
  • Suitable plastic films are those with Thicknesses in the range of typically between 5 and 1000 ⁇ m from the known polymers, copolymers, graft polymers, polymer mixtures with film-forming molecular weights included the additives common for film production and processing.
  • FIG. 1 shows the separation and winding process a device 15 in five stages (I - V). It has to be stressed that this subdivision is only for explanation and the process is actually ongoing.
  • the material web running over a winding roller 11 B e.g. a film web coming from an extruder made of plastic, a paper or textile material web, shown, on the adjacent, almost full web of material 12 wound around the preceding winding tube 14 becomes.
  • the almost full wrap 12 is usually on the side of one referred to as a "winding station" pivotable pair Arms 120 (only the front one is shown in Fig. 1) in one desired position and with desired or in known Wise (see e.g. the two European pantomexts mentioned above) controlled contact pressure on the winding roller 11 held.
  • 120 is not critical to the present invention can be different, e.g. as a controlled movable carriage with vertical support.
  • An empty fresh winding tube 16 with (not shown) Guide mandrel is made from a (not shown) Magazine of conventional design supplied and a guide roller 18 is from their rest position towards the film web B. the winding 12 out.
  • the deflection roller 18 comes in Contact with the film web B on the film wrap 12 during at the same time an empty winding tube 16 using a (for better overview, not shown) usual pair of swivel arms (referred to as the "winding station") towards Gap between the winding roller 11 and the film roll 12 out until the deflection roller 18 abuts the film roll 12.
  • a winding station usual pair of swivel arms
  • the foil wrapper 12 is pivoted (or method) of the winding station 120 from the winding roller 11 removed while the empty winding tube 16 and the guide roller 18 to be moved to the position in stage IV of the scheme of Figure 1, i.e. the deflection roller 18 on the film roll 12 is present and for this after termination of the contact serves with the winding roller 11 as a contact roller, and preferably in a position above that before termination the contact existing contact line between the winding roller 11 and the film wrap 12.
  • the web B continues in stage IV on the film wrap 12, but with the detour around empty winding tube 16 and the deflection roller 18th
  • the front end of the subsequent material web section embossed on the empty winding tube 16 thus the (not shown) central drive with the winding tube 16 is engaged, the winding process adjusted wrap can exercise.
  • the exact operating parameters Contact pressure at the gap between web winding and Winding roller; Tension and running speed
  • FIG. 2 schematically and in detail shows a winding device 25 with a separating device 20 according to the invention, which has been guided in the manner described in FIG. 1 into the path of the material web B between the winding roller 21 and the movable deflection roller 28.
  • the separating device 20 is provided with a knife 201 which is designed as a serrated knife in a manner which is not shown but is known per se and which extends at least over the entire width of the material web B.
  • the arcuate air flow L arises from the fact that by means of one curved and at least over the whole Width of the material web B extending guide or guide wall 203 and the adjacent surface of the winding tube 26 an arcuate space is formed, of which the winding roller 21 adjacent end is connected to a vacuum channel 200.
  • the channel 200 can be a housing connected to the knife 201 be that of the guide wall 203, the near the winding roller 21st extending wall 204, rear wall 205 and top wall 206 is formed.
  • the channel 200 has a slot shape over the Channel width extending opening 209 that the air flow L generated.
  • a baffle 27 can serve the path of the air flow L to lead close to the winding roller 21.
  • the side ends (not shown) of the vacuum channel are closed or with a vacuum source, e.g. one pressurized boiler (not shown) connected, which runs continuously with correspondingly powerful pumps is evacuated.
  • a vacuum source e.g. one pressurized boiler (not shown) connected, which runs continuously with correspondingly powerful pumps is evacuated.
  • the winding roller 21 has, according to a preferred embodiment of the invention when applied to airtight Web materials, such as plastic films in particular or relatively dense papers, a hollow interior 210, also with a vacuum source (not shown) is connected and the usually around 180 ° of the circumference of the winding roller 21 on this adjacent material web B on e.g. from a rubber layer 212 existing surface of the winding roller on the jacket wall 211 21 holds.
  • This measure has the particular advantage of Avoidance of jerky effects on the material web in the area between the winding roller 21 and an upstream side Area of the material web, e.g. in connection with the production of plastic films by extrusion or the like
  • Procedure is sensitive to jerky loads, such as uncontrolled stretching or sagging resulting tension in the web or by stretching caused differences in orientation or strength.
  • Fig. 2 the winding tube 26 is as on a solid Core mandrel 261 shown guided. But it is within the Invention, also inside the winding tube 26, a negative pressure to generate the over-the-dashed channels 263 acts on the adjacent material web and sucks it up.
  • Fig. 3 shows a modification of the in Fig. 2 schematically shown separator: this is the vacuum channel 300 from a hollow body, e.g. a tube 39, formed the a slot-shaped opening 309 for sucking in the air flow L. has.
  • the connection with the knife 301 can be arbitrary, e.g. in the form of a simple connecting plate or bracket be formed, provided only the arcuate guide wall 303 remains.
  • Features of the separator 30 - namely the vacuum channel 300, the arcuate guide wall 303 and so on connected knife 301 - with walls 304, 305 and 306 be a hollow body, optionally with the atmosphere connected or under increased pressure.
  • the geometry is preferably all essential to the invention Parts of a separation device according to the invention - i.e. in the embodiment of the shown in Figures 2 and 3 Baffle 203,303, the knife 201, 301 and the vacuum channel 200,300 - designed so that the arcuate airflow L at least 90 °, preferably at least 120 ° and in particular comprises at least 140 ° of the circumference of the winding tube and the until the moment the web is separated from the winding tube Material web the winding tube at least to about 180 ° of yours Scope includes.
  • a device according to the invention is instead of a Serrated knife 201,301 a known cross cutting device, e.g. according to DE-A-2 243 504, used with the housing 20.30 is connected and leads to an oblique cut.
  • a known cross cutting device e.g. according to DE-A-2 243 504
  • the invention can thus also be an oblique cut wrapped on a fresh tube at the beginning of a film section without using the familiar tools to tackle (Gluing or / and electrostatic adhesion) are used Need to become.
  • the separating device according to the invention enables a Comparison to the prior art simple construction as well offers simple yet safe operation and thus offers a number of other advantages: so the separating device-apart mostly made of steel, hard material or ceramic Knives - made of light metal, so the moving mass is comparatively small. It can Swinging in and out in the usual way with pneumatic or hydraulic actuators are effected.
  • the inventive Separating device can not only in new plants but also existing systems to replace the known ones Separators are installed.

Landscapes

  • Replacement Of Web Rolls (AREA)
  • Winding Of Webs (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Claims (14)

  1. Procédé de bobinage d'un panneau de matériau en déplacement continu (B) sur une succession de mandrins de bobinage (16; 26; 36) d'un dispositif de bobinage (15; 25; 35) comprenant un rouleau de bobinage (11; 21; 31), au moins un rouleau de renvoi mobile (18; 28; 38) et un dispositif de séparation (10; 20; 30), l'extrémité avant E1 du panneau de matériau en déplacement (B) formée lors de l'actionnement du dispositif de séparation étant mise en contact de bobinage avec le mandrin de bobinage sous l'influence d'un courant d'air en arc (L), s'étendant au moins sur environ un quart de la circonférence du mandrin, pratiquement au moins au-delà de la largeur du mandrin de bobinage et jusqu'à un point proche de la ligne de contact (K) entre le rouleau de bobinage et le mandrin de bobinage adjacent à celui-ci, caractérisé en ce que le courant d'air en arc (L) est entraíné par une ouverture s'étendant en fente au-delà de l'ensemble de la largeur du canal (209; 309), produisant une dépression à proximité de la ligne de contact (K) entre le rouleau de bobinage et le mandrin de bobinage adjacent à celui-ci.
  2. Procédé selon la revendication 1, caractérisé en ce que la vitesse du courant d'air représente le double, de préférence au moins le triple de la vitesse du panneau de matériau en déplacement continu, la vitesse de déplacement du panneau de matériau (B) étant de préférence comprise dans l'intervalle allant de 30 à 400 mètres par minute.
  3. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que chaque mandrin de bobinage (16; 26; 36) est relié à un dispositif d'entraínement central.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la dépression est comprise entre -450 et -900 mBar.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la formation du courant d'air en arc L est facilitée par des courants affluents latéraux (321; 322).
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que le panneau de matériau (B) est adjacent à environ la moitié de la circonférence du mandrin de bobinage (16; 26; 36) lors de l'actionnement du dispositif de séparation.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que le panneau de matériau (B) est retenu par l'intermédiaire d'une dépression appliquée à l'intérieur du rouleau de bobinage (11; 21; 31) sur le rouleau de bobinage de l'enveloppe du rouleau (211; 311) comportant des ouvertures (213; 313) en vue d'assurer un procédé de séparation pratiquement sans à-coups.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce qu'en vue du renforcement du contact entre le panneau de matériau (B) et le rouleau de bobinage (26), une dépression est appliquée à l'intérieur du mandrin de bobinage comportant des ouvertures (263).
  9. Dispositif de séparation (10; 20; 30) pour un dispositif (15; 25; 35) servant au bobinage d'un panneau de matériau (B) en déplacement continu sur une succession de mandrins de bobinage (16; 26; 36), caractérisé en ce que le dispositif de séparation comporte un canal à vide (200; 300) s'étendant sur la longueur des mandrins de bobinage, relié à une paroi de guidage (203; 303) entourant en arc au moins un quart de la circonférence du mandrin de bobinage (16; 26; 36) et à une lame dentelée (201; 301), en vue d'établir un contact par bobinage entre l'extrémité avant (E1) du panneau de matériau en déplacement (B) formée lors de l'actionnement du dispositif de séparation et le mandrin de bobinage sous l'influence d'un courant d'air en arc (L), s'étendant au moins sur environ un quart de la circonférence du mandrin, au moins pratiquement au-delà de la largeur du mandrin de bobinage et jusqu'à un point proche de la ligne de contact (K) entre le rouleau de bobinage et le mandrin de bobinage qui y est adjacent.
  10. Dispositif de séparation selon la revendication 9, caractérisé en ce qu'il est relié à un dispositif destiné à être inséré par basculement dans la trajectoire du panneau de matériau (B) entre un nouveau mandrin de bobinage (16; 26; 36) adjacent au rouleau de bobinage (11; 21; 31) et un rouleau de renvoi mobile (18; 28; 38) guidé dans une position proche du mandrin de bobinage.
  11. Dispositif de séparation selon l'une des revendications 9 ou 10, caractérisé en ce que la paroi de guidage (303) servant au guidage du courant d'air en arc L comporte des ouvertures (321, 322) reliées à l'atmosphère environnante ou à une source d'air à surpression.
  12. Dispositif de bobinage d'un panneau de matériau (B) en déplacement continu sur une succession de mandrins de bobinage (16; 26; 36), ce dispositif comportant un rouleau de bobinage (11; 21; 31), au moins un rouleau de renvoi mobile (18; 28; 38) et un dispositif (15; 25; 35) servant à la séparation du panneau de matériau, en vue de former sur celui-ci une extrémité de panneau (E0) contactant un mandrin de bobinage précédent plein et une extrémité de panneau (E1) destinée à l'enroulement sur le mandrin de bobinage vide suivant, caractérisé en ce que le dispositif de séparation comporte un canal à vide (200; 300) s'étendant sur la longueur des mandrins de bobinage, relié à une paroi de guidage (203; 303) entourant en arc au moins un quart de la circonférence du mandrin de bobinage (16; 26; 36) et à une lame dentelée (201; 301), en vue d'établir un contact par bobinage entre l'extrémité avant (E1) du panneau de matériau en déplacement (B) formée lors de l'actionnement du dispositif de séparation et le mandrin de bobinage sous l'influence d'un courant d'air en arc (L), s'étendant au moins sur environ un quart de la circonférence du mandrin, au moins pratiquement au-delà de la largeur du mandrin de bobinage (16; 26; 36) et jusqu'à un point proche de la ligne de contact (K) entre le rouleau de bobinage (11; 21; 31) et le mandrin de bobinage qui y est adjacent.
  13. Dispositif selon la revendication 12, caractérisé en ce que le rouleau de bobinage (21) comporte une enveloppe (211) comportant un revêtement en caoutchouc (212) et des ouvertures (21), pour maintenir un contact ferme avec un panneau de matériau adjacent (B) par l'intermédiaire d'une dépression appliquée à l'intérieur (210) du rouleau de bobinage (21) et d'assurer un bobinage pratiquement sans à-coups.
  14. Dispositif selon l'une des revendications 1 à 8 pour le bobinage de panneaux pratiquement sans fin ou de rubans d'une feuille plastique lors de la fabrication ou du traitement de la feuille.
EP98929372A 1997-07-30 1998-05-25 Procede de bobinage, dispositif de separation de bande et bobineuse de bande Expired - Lifetime EP0999991B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH182497 1997-07-30
CH182497 1997-07-30
PCT/EP1998/003067 WO1999006313A1 (fr) 1997-07-30 1998-05-25 Procede de bobinage, dispositif de separation de bande et bobineuse de bande

Publications (2)

Publication Number Publication Date
EP0999991A1 EP0999991A1 (fr) 2000-05-17
EP0999991B1 true EP0999991B1 (fr) 2002-09-04

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EP98929372A Expired - Lifetime EP0999991B1 (fr) 1997-07-30 1998-05-25 Procede de bobinage, dispositif de separation de bande et bobineuse de bande

Country Status (6)

Country Link
US (1) US6305635B1 (fr)
EP (1) EP0999991B1 (fr)
JP (1) JP2002509510A (fr)
AT (1) ATE223347T1 (fr)
DE (1) DE59805441D1 (fr)
WO (1) WO1999006313A1 (fr)

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US7011268B2 (en) * 2000-08-07 2006-03-14 Windmoeller & Hoelscher Kg Method and device for cutting through a running web of material and for fixing the start of the following web section on a core
DE10059622B4 (de) * 2000-10-31 2007-10-18 Windmöller & Hölscher Kg Vorrichtung zum Aufwickeln einer kontinuierlich laufenden Materialbahn auf eine Folge von Wickelhülsen
DE10321599A1 (de) * 2003-05-13 2004-12-30 Windmöller & Hölscher Kg Wickelvorrichtung mit elektrostatischen Auflademitteln und Verfahren zum Festlegen mehrlagiger Folie
DE10321600B4 (de) * 2003-05-13 2005-05-04 Windmöller & Hölscher Kg Wickelvorrichtung mit einer Strahlungsquelle zur Positionierung der Wickelhülsen
DE10321642B4 (de) * 2003-05-13 2006-01-05 Windmöller & Hölscher Kg Wickelvorrichtung mit gerader Tragschiene
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DE102004038500A1 (de) * 2004-08-07 2006-03-16 Voith Paper Patent Gmbh Wickelmaschine und Verfahren zum Überführen einer laufenden Materialbahn auf einen Wickelkern
DE102006038955A1 (de) * 2006-08-18 2008-02-21 Voith Patent Gmbh Rollenwickelvorrichtung zum Aufwickeln einer Materialbahn
US8430351B2 (en) * 2007-10-16 2013-04-30 Gloucester Engineering Co., Inc. Stretch film winder
DE102008040941A1 (de) 2008-08-01 2010-02-18 Dilo Trading Ag Lithium-Ionen-Zellen mit aktiviertem Elektrolyt
US9187285B2 (en) * 2012-11-19 2015-11-17 Valmet Technologies, Inc. Slitter-winder of a fiber production line

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US5257748A (en) * 1989-09-27 1993-11-02 Krantz America, Inc. Sheet winding apparatus
DE19542096C2 (de) * 1995-04-12 2000-03-23 Reifenhaeuser Masch Verfahren zum Anwickeln des vorlaufenden Endes einer quergetrennten Werkstoffbahn, insbes. einer quergetrennten Kunststoffbahn, auf eine Wickelhülse
IT1289169B1 (it) * 1997-01-10 1998-09-29 Italconverting Srl Macchina e metodo per la produzione di rotoli o logs di materiali in foglio
DE19710282A1 (de) * 1997-03-13 1998-09-17 Voith Sulzer Papiermasch Gmbh Wickelmaschine zum Aufwickeln einer Materialbahn
US5865389A (en) * 1997-07-24 1999-02-02 Hewlett-Packard Company Entrainment air dam
US6186436B1 (en) * 1998-10-21 2001-02-13 Cmd Corporation Bag winder and method thereof

Also Published As

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DE59805441D1 (de) 2002-10-10
US6305635B1 (en) 2001-10-23
JP2002509510A (ja) 2002-03-26
WO1999006313A1 (fr) 1999-02-11
ATE223347T1 (de) 2002-09-15
EP0999991A1 (fr) 2000-05-17

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