EP0909592B1 - Procédé pour la décharge superficielle électrostatique et le dépoussiérage de pièces et dispositif pour mettre en oeuvre le procédé - Google Patents

Procédé pour la décharge superficielle électrostatique et le dépoussiérage de pièces et dispositif pour mettre en oeuvre le procédé Download PDF

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Publication number
EP0909592B1
EP0909592B1 EP98119515A EP98119515A EP0909592B1 EP 0909592 B1 EP0909592 B1 EP 0909592B1 EP 98119515 A EP98119515 A EP 98119515A EP 98119515 A EP98119515 A EP 98119515A EP 0909592 B1 EP0909592 B1 EP 0909592B1
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EP
European Patent Office
Prior art keywords
brush
workpiece
chamber
workpiece surface
feed direction
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
EP98119515A
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German (de)
English (en)
Other versions
EP0909592A2 (fr
EP0909592A3 (fr
Inventor
Peter Kist
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Individual
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Individual
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Filing date
Publication date
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Publication of EP0909592A2 publication Critical patent/EP0909592A2/fr
Publication of EP0909592A3 publication Critical patent/EP0909592A3/fr
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Publication of EP0909592B1 publication Critical patent/EP0909592B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/002—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing cleaning devices for sheets or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B6/00—Cleaning by electrostatic means

Definitions

  • the invention relates to a method for electrostatic Surface discharge, especially for cleaning and dedusting of workpiece surfaces, and a device for Execution of the procedure.
  • DE-OS 38 20 931 describes a method for electrostatic Surface discharge and dedusting from different Surfaces made of different materials known, by means of two ionization rods arranged in parallel in an ionization space two both positive and negative ions containing ion currents generated and this by means of an between air stream flowing towards them, at an angle of inclination directed to the surface of a workpiece to be dusted will be carried away, after the electrostatic Surface discharge the air with the dust particles contained in it is suctioned off.
  • the device for performing this The method has a surface in the ionization space the two parallel ionizing bars and in between arranged flat jet nozzles carries, the surface opposite a horizontal surface in the direction of an adjacent suction channel is inclined around that emerging from the flat jet nozzle Airflow at an angle to the surface of a workpiece to be dusted or cleaned.
  • DE-A-1 786 277 describes a further method for electrostatic Surface discharge and dedusting of workpieces known, in which with a first ionizing rod generates positive and negative ions and points to the Workpiece surface, then the dust particles with one in a Brush chamber arranged brush detached from the workpiece surface and into one in the brush chamber opening suction channel are promoted and suctioned, and in an area viewed in the feed direction of the workpiece Brush chamber with a second ionizing bar generates positive and negative ions and by means of an air jet exiting through holes in the brush chamber onto the dedusted Workpiece surface and a portion of the brush are guided.
  • electrostatically bound particles and through the brush for example, hygroscopically or mechanically Bound particles effectively from the workpiece surface removed and fed to an extraction system, so that the gun is reduced so that it is not in get into the environment and possibly other workpieces can contaminate.
  • the other is with the brush certain mechanical processing of the workpiece surface possible, for example if after a laminate coating of the Edge cleaning must be done on the workpiece.
  • this object is achieved by a method in which with a first ionizing bar positive and negative Ions are generated and directed onto the workpiece surface, then the dust particles with at least one in one Brush chamber arranged brush from the workpiece surface detached and to a viewed in the feed direction of the workpiece in front of the brush in the brush chamber opening conveyed and suctioned off in one in the feed direction of the workpiece surface considered the following area Brush chamber by means of at least one through nozzles into the brush chamber emerging, preferably at an angle to the workpiece surface directed air jet an excess pressure is generated, and with a second ionizing bar positive and negative ions generated and on the dusted workpiece surface and at least a portion of the brush can be directed.
  • a Preionization is carried out, which is the electrostatically charged and contaminated surface of the workpiece on its entire surface Width discharges and the electrostatic binding forces between dust particles and surface. Below you can then the electrostatically discharged, but under certain circumstances still mechanically or hygroscopically bound particles with the Brush detached from the workpiece surface and to the suction channel transported and suctioned.
  • the downstream, second ionization rod carries out postionization, the continuous discharge of the brush and the workpiece surface causes so that no further contamination of the workpiece surface after cleaning and dust removal can.
  • the air jet hits the Workpiece surface, it is an advantage if according to a preferred embodiment the air jet at an angle to the feed direction of the workpiece is directed towards the workpiece surface and the brush and the bristles in the contact area to the workpiece against the feed direction bends so that the bristles compact in this area become. This firstly cleans the bristles of possibly still adhering residual particles, on the other is due to the compression of the bristles caused by the air jet squeezed together, a more intense and therefore more effective Cleaning of the workpiece surface possible.
  • part of the air supplied by the air jet between the brush and the upper limit of the brush chamber is led to the suction channel. This reliably prevents that particles detached from the workpiece surface instead to be directed into the suction channel through this space get out of the device and into the environment.
  • the brush can be of any design, provided that an effective detachment of particles from the workpiece surface allows, it is an advantage if the dust particles by a rotating brush from the workpiece surface be replaced. This can be done by a corresponding Drive the brush the relative movement between the brush and the workpiece surface can be increased, resulting in a significant contributes to an improved cleaning effect. On the other hand by an opposite to the feed direction of the workpiece rotating brush a targeted promotion of the detached particles to the suction channel.
  • a rotating brush is especially useful for cleaning flat surfaces Suitable workpiece surfaces.
  • By adjusting the rotating Brush in height can also be uneven Effectively clean workpiece surfaces so that according to an advantageous Embodiment the brush for cleaning wells and increases in height at least in some areas becomes.
  • the air jet can be generated with any nozzle if an adequate air supply is possible, it is an advantage if the air jet is by means of flat jet nozzles is produced. This can be done in a simple manner realize a sharp air flow, with which advantageously then simply creates an air shield and moreover expediently the ions of the second ionization rod to the contact area can be guided by brush and workpiece. To the one is, as described above, the leakage of detached Prevents particles from the device, and secondly is the continuous discharge of the brush and the material surface improved during post-ionization.
  • the inventive device for performing the described Method has at least one in a brush chamber arranged brush for brushing the workpiece surface, a first ionizing bar to generate positive and negative Ions in the feed direction of the unloaded and cleaned
  • the workpiece viewed in front of the brush chamber is, at least one suction channel opening into the brush chamber for suction of the detached from the workpiece surface Particles, the suction channel in the feed direction of the workpiece considered before the brush opens into the brush chamber, at least a nozzle arranged after the brush for supplying a Air jet into an area of the brush chamber arranged after the brush, creating an overpressure, and one after the nozzle arranged second ionization rod for generating positive and negative ions.
  • the first ionization rod for pre-ionization in front of the brush chamber is what is to be unloaded and dusted Unload the workpiece before entering the brush chamber. This creates the electrostatic binding forces between particles and surface of the workpiece.
  • the after the Brush arranged nozzle for supplying an air jet into the Brush chamber causes an overpressure to be generated there and consequently an air shield is created, which has the exit prevented from detached particles from the device.
  • the finally arranged second ionization rod for Finally, post-ionization causes a continuous Discharge of the brush and the material surface, so that after the dedusting and cleaning of the workpiece surface no further pollution from static charges can.
  • the brush can be of any design, provided that it a reliable detachment of mechanical or hygroscopically bound particles from the workpiece surface allows.
  • the brush is advantageously a rotating one Roll brush designed because it is the workpiece surface can be brushed continuously, resulting in a clear leads to an improved cleaning effect.
  • the relative movement between brush and Workpiece surface area can be increased, which also leads to an improved Cleaning effect contributes.
  • too through an advantageous rotation of the brush against the feed direction of the workpiece to be dusted and cleaned the supply of the detached particles to the suction channel and thus their effective suction further increased significantly.
  • the brush is adjustable in height trained so that, on the one hand, wear of the Brush can be balanced, and secondly an adjustment to a deepening or raising of the workpiece surface is possible. It is safe and reliable Cleaning the workpiece surface even on an uneven workpiece surface and possible after a long period of operation.
  • the brush can be formed in one piece, which is particularly in the With regard to mounting the brush offers advantages.
  • the brush is composed of segments, so that the a working width easily in the manner of a modular system the device can be realized.
  • a brush segments with different bristle materials or bristle densities are used so that an adjustment to a workpiece surface is possible, the different areas having. For example, when cleaning a Card that has a magnetic stripe in this area Brush segment with soft bristle material, so as not to damage the sensitive magnetic stripe. moreover If the brush is worn unevenly, the respective individual elements can be replaced without the same to replace the whole brush.
  • the mouth of the suction channel is accompanied by an air flow a high airspeed created that the detached Conducts particles safely and reliably into the suction channel.
  • the outer lip is the outer lip with a small distance arranged adjacent to the workpiece surface, while the inner Lip is offset in height.
  • the nozzle is advantageously designed as a flat jet nozzle, because it simply creates a sharp air flow and thus an air shield can be created which will replace the exit Particles effectively prevented from the device.
  • the flat jet nozzle is so contrary to the Feed direction of the workpiece arranged inclined that the Airflow both on the workpiece surface and on at least the area of contact of the brush with the workpiece surface is directed. On the one hand, this makes both post-ionization the workpiece surface and the brush improved because the Ions can then be better distributed in this area.
  • the bristles in the contact area of the brush with the Workpiece surface bent and compressed, so that the cleaning effect the brush is significantly improved here.
  • a housing is advantageously made for the device Continuous cast aluminum profile is used because this is easy with the necessary recesses is to be made. You can also through the use of a housing made of extruded aluminum Devices in any dimensions and therefore optimal can be produced adapted to the respective application.
  • the housing advantageously has an outer surface Number of grooves, which are preferably designed as T-grooves are so that the device can be easily and securely attached can.
  • the housing advantageously has a device to attach a brush chamber cover.
  • This Brush chamber cover can be used, for example, as a bulkhead be trained and the brush chamber im not by that Cover the workpiece covered area downwards. In order to the flexibility of the device is effectively increased.
  • the device 1 shows a sectional view through a device 1.
  • the device 1 has a housing 3, which consists of an extruded aluminum profile and a brush chamber 5, a suction channel 7 and a motor chamber 9.
  • a housing 3 On the outside of the housing 3 are a plurality of T-shaped fastening grooves 11 and one with the suction channel 7 connected suction nozzle 13.
  • the suction nozzle 13 is with a Derivation not shown connected, which in turn with a suction fan, not shown, and one, not shown Filter is connected.
  • a roller brush 17 arranged by a drive belt 19 from the engine 15 is driven.
  • a flat jet nozzle 21 is arranged, which generates an air flow 23 and is connected to a compressed air duct 25.
  • a second ionization rod in the brush chamber 5 27 arranged, which generates positive and negative ions.
  • the second ionizing rod 27 is in the direction of movement of a workpiece 29 to be cleaned, as viewed by the Arrow 31 indicated, arranged at the rear end of the brush chamber 5.
  • the suction channel opens at the front end of the brush chamber 5 7 with a nozzle-shaped lip channel 33.
  • the outer Lip 35 of lip channel 33 is up to workpiece 29 pulled down and arranged adjacent to this, while the inner lip 37 is offset in height upwards from the outer lip 35 is arranged.
  • a first ionization rod 39 for preionization the surface of the workpiece 29 is arranged.
  • a fastening device 41 on the one Cover for the brush chamber 5 can be attached. This Cover, not shown, seals the brush chamber 5 downwards when unloading a workpiece with a narrow width and should be dedusted so that the suction is fully effective reserves.
  • the device 1 described here for electrostatic surface discharge and dust removal from workpieces works like follows.
  • a workpiece 29 with electrostatic and / or mechanical or hygroscopically bound particles 43 becomes the device 1 fed in the direction of arrow 31.
  • the one on the inlet side of the housing 1 arranged pre-ionization 39 conducts positive and negative ions on the surface of the workpiece 29 and lifts thus the electrostatic binding forces between particles 43 and surface of the workpiece 29.
  • the electrostatically discharged Workpiece 29 then continues into the brush chamber 5, where the electrostatically discharged, but possibly still mechanically or hygroscopic on the surface of the workpiece 29 adhering particles 43 by means of the roller brush 17, which rotates against the feed direction 31, from the surface of the Workpiece 29 loosened and transported to the lip channel 33.
  • After brushing through the brush 17 passes the workpiece 29 to the rear area of the Brush chamber 5, where the post ionization 27 is arranged. This also generates positive and negative ions and causes one continuous discharge of both the surface of the workpiece 29 and the brush 17.
  • the brush chamber 5 In this area of the brush chamber 5 also opens the flat jet nozzle 21 which an air flow 23 on the Surface of the workpiece 29 against its feed direction 31 and aimed at the brush 17. In this way, on the one hand creates an air shield that prevents detached particles 43 pass past ionization 27 from housing 3 can.
  • the brush chamber 5 In this area the brush chamber 5 generates an overpressure so that the air between the Roller brush 17 and the upper limit 45 of the brush chamber 5 flows to the groove channel 33 and reaches the suction channel 7, so that no particles 43 emerge from the housing 3 in this way can.
  • the bristles are caused by the air jet 23 the brush 17 bent in the direction of rotation, so that the Bristles of the brush 17 compacted in the contact area with the workpiece 29 are and better cleaning the surface of the Workpiece 29 cause.
  • Fig. 2 the device 1 of Fig. 1 with the brush lowered 17 shown in section. It can be a new one here detailed description of the device 1 can be dispensed with, since here the difference to Fig. 1 is only in the lowered Brush roller 17 exists.
  • the one to be unloaded and cleaned Workpiece 29 here has a recess 47 through which lowered brush roller still reliable in reference is cleaned in the manner described in Fig. 1, so that the particles 43 are conveyed into the suction channel 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Elimination Of Static Electricity (AREA)

Claims (18)

  1. Procédé pour la décharge superficielle et le dépoussiérage électrostatiques de pièces (29),
    dans lequel des ions positifs et négatifs sont produits par une première barre d'ionisation (39) et conduits à la surface de la pièce,
    ensuite les particules de poussière (43) sont séparées de la surface de la pièce par au moins une brosse (17) disposée dans une chambre de brosse (5) et transportées et aspirées dans un canal d'aspiration (7) débouchant dans la chambre de brosse (5) en avant de la brosse, par rapport à la direction d'amenée de la pièce,
    une surpression est produite dans une région consécutive de la chambre de brosse (5), par rapport à la direction d'amenée de la pièce, par au moins un jet d'air (23) pénétrant dans la chambre de brosse (5) par des buses (21), et de préférence dirigé selon un angle par rapport à la surface de la pièce,
    et des ions positifs et négatifs sont produits par une deuxième barre d'ionisation (27) et conduits sur la surface dépoussiérée de la pièce et au moins une région partielle de la brosse (17).
  2. Procédé selon la revendication 1, caractérisé en ce que le jet d'air (23) est dirigé avec un angle à l'encontre de la direction d'amenée (31) de la pièce (29) sur la surface de la pièce et la brosse (17), et les poils de brosse dans la région de contact de la pièce (29) sont recourbés à l'encontre de la direction d'amenée (23) en sorte que les poils de brosse sont comprimés dans cette région.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'une partie de l'air amené par le jet d'air (23) entre la brosse (17) et la limite supérieure (45) de la chambre de brosse (5) est conduite au canal d'aspiration (7).
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que les particules de poussière (43) sont séparées de la surface de la pièce par une brosse rotative (17).
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que la brosse (17) est réglable en hauteur, au moins dans une région, pour le nettoyage d'évidements (47) ou de bosses.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que le jet d'air (23) est produit au moyen d'éjecteurs plats (21).
  7. Procédé selon la revendication 6, caractérisé en ce que les éjecteurs plats (21) produisent un écran d'air (23) et les ions de la deuxième barre d'ionisation (27) sont conduits dans la région de contact de la brosse (17) et de la pièce (29).
  8. Dispositif pour la mise en oeuvre du procédé selon la revendication 1,
    avec au moins une brosse (17) disposée dans une chambre de brosse (5) pour le brossage de la surface de la pièce,
    une première barre d'ionisation (39) pour la production d'ions positifs et négatifs, qui est disposée en avant de la chambre de brosse (5) par rapport à la direction d'amenée (31) de la pièce (29) à décharger et nettoyer,
    au moins un canal d'aspiration (7) débouchant dans la chambre de brosse (5) pour l'aspiration des particules de poussière (43) séparées de la surface de la pièce, le canal d'aspiration (7) débouchant dans la chambre de brosse (5) en avant de la brosse (17) par rapport à la direction d'amenée (31) de la pièce (29),
    au moins une buse (21) disposée après la brosse (17) pour amener un jet d'air (23) dans une région de la chambre de brosse (5) disposée après la brosse, dans laquelle est ainsi produite une surpression,
    et une deuxième barre d'ionisation (27) disposée après la buse (21) pour produire des ions positifs et négatifs.
  9. Procédé selon la revendication 8, caractérisée en ce que la brosse est une brosse cylindrique (17).
  10. Dispositif selon la revendication 8 ou 9, caractérisée en ce que la brosse (17) est réglable en hauteur.
  11. Dispositif selon l'une des revendications 8 à 10, caractérisé en ce que la brosse (17) est composée de segments.
  12. Dispositif selon l'une des revendications 8 à 11, caractérisé en ce que l'embouchure du canal d'aspiration (7) dans la chambre de brosse (5) est réalisée sous la forme d'un canal à lèvres (33) ayant en section la forme d'une buse.
  13. Dispositif selon la revendication 12, caractérisé en ce que la lèvre extérieure (35) se prolonge et est disposée près de la pièce (29), et la lèvre intérieure (37) est disposée décalée en hauteur vers le haut par rapport à la lèvre extérieure (35).
  14. Dispositif selon l'une des revendications 8 à 13, caractérisé en ce que la buse est un éjecteur plat (21).
  15. Dispositif selon la revendication 14, caractérisé en ce que l'éjecteur plat (21) est incliné à l'encontre de la direction d'amenée (31) de la pièce (29) sur la surface de la pièce et est dirigé sur la région de contact de la brosse (17) avec la pièce (29).
  16. Dispositif selon l'une des revendications 8 à 15, caractérisé en ce que le boítier (3) du dispositif (1) est formé d'un profilé obtenu par coulée continue d'aluminium.
  17. Procédé selon l'une des revendications 8 à 16, caractérisé en ce que le boítier (3) présente des rainures de fixation (11).
  18. Dispositif selon l'une des revendications 8 à 17, caractérisé en ce que le boítier (3) présente un dispositif (41) pour la fixation d'un couvercle de chambre de brosse.
EP98119515A 1997-10-17 1998-10-15 Procédé pour la décharge superficielle électrostatique et le dépoussiérage de pièces et dispositif pour mettre en oeuvre le procédé Expired - Lifetime EP0909592B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19746028 1997-10-17
DE19746028A DE19746028C2 (de) 1997-10-17 1997-10-17 Verfahren zur elektrostatischen Oberflächenentladung und Entstaubung von Werkstücken und Vorrichtung zur Durchführung des Verfahrens

Publications (3)

Publication Number Publication Date
EP0909592A2 EP0909592A2 (fr) 1999-04-21
EP0909592A3 EP0909592A3 (fr) 2000-07-05
EP0909592B1 true EP0909592B1 (fr) 2003-01-02

Family

ID=7845910

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98119515A Expired - Lifetime EP0909592B1 (fr) 1997-10-17 1998-10-15 Procédé pour la décharge superficielle électrostatique et le dépoussiérage de pièces et dispositif pour mettre en oeuvre le procédé

Country Status (3)

Country Link
EP (1) EP0909592B1 (fr)
AT (1) ATE230313T1 (fr)
DE (2) DE19746028C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7617562B2 (en) 2004-11-24 2009-11-17 Hauni Maschinenbau Ag Apparatus for contactless cleaning of a conveying element and arrangement for transporting and/or storing of rod-shaped articles with an apparatus for contactless cleaning of a conveying element
EP4003615B1 (fr) * 2019-11-25 2023-06-21 Koenig & Bauer AG Machine de traitement dotée d'au moins un dispositif de nettoyage et procédé de nettoyage

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3215094B2 (ja) * 1999-07-30 2001-10-02 株式会社伸興 枚葉オフセット印刷機
DE19957929A1 (de) * 1999-12-01 2001-06-07 Koenig & Bauer Ag Verfahren und Vorrichtung zum Behandeln der Oberflächen von Bedruckstoffen in Druckmaschinen
DE10345606B4 (de) * 2003-09-29 2006-12-14 Preh Keytec Gmbh Kartenleser
DE102009006766A1 (de) * 2008-10-17 2010-05-20 Aebi-Schmidt-Holding Ag Aufnehmende Kehrmaschine
CN105537203B (zh) * 2016-02-01 2017-02-22 黄淮学院 一种风电融合除尘器吸嘴及其集尘设备
CN105598093B (zh) * 2016-02-01 2017-02-22 黄淮学院 一种风电融合除尘器吸嘴及其集尘设备
CN106540944B (zh) * 2016-11-25 2018-11-09 江苏品之杰纺织实业有限公司 一种纺织设备吸附除尘装置
CN114472435B (zh) * 2022-03-03 2023-03-14 河南英拓智能科技有限公司 一种实验室用安全型通风柜
CN118847618A (zh) * 2024-07-18 2024-10-29 天津聚元新能源科技有限公司 一种分切机的除尘装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1786277A1 (de) * 1968-09-10 1972-01-20 Hans Gruenenfelder Vorrichtung zum elektrostatischen Entladen von laufenden Materialbahnen und deren gleichzeitiger Entstaubung
JPS5216354B2 (fr) * 1972-04-10 1977-05-09
US3986223A (en) * 1973-05-21 1976-10-19 Herbert Products, Inc. Surface cleaning device
JPS5194671A (fr) * 1975-02-13 1976-08-19
DE3820931C2 (de) * 1988-06-21 1994-05-26 Peter Kist Verfahren zur elektrostatischen Oberflächenentladung und Entstaubung von Werkstücken und Vorrichtung zur Durchführung des Verfahrens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7617562B2 (en) 2004-11-24 2009-11-17 Hauni Maschinenbau Ag Apparatus for contactless cleaning of a conveying element and arrangement for transporting and/or storing of rod-shaped articles with an apparatus for contactless cleaning of a conveying element
EP4003615B1 (fr) * 2019-11-25 2023-06-21 Koenig & Bauer AG Machine de traitement dotée d'au moins un dispositif de nettoyage et procédé de nettoyage

Also Published As

Publication number Publication date
EP0909592A2 (fr) 1999-04-21
ATE230313T1 (de) 2003-01-15
DE19746028C2 (de) 2000-04-27
EP0909592A3 (fr) 2000-07-05
DE59806805D1 (de) 2003-02-06
DE19746028A1 (de) 1999-04-29

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