EP1172152B1 - Système d'alimentation en peinture avec conduits raclables pour un appareil de revêtement électrostatique - Google Patents

Système d'alimentation en peinture avec conduits raclables pour un appareil de revêtement électrostatique Download PDF

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Publication number
EP1172152B1
EP1172152B1 EP01114338A EP01114338A EP1172152B1 EP 1172152 B1 EP1172152 B1 EP 1172152B1 EP 01114338 A EP01114338 A EP 01114338A EP 01114338 A EP01114338 A EP 01114338A EP 1172152 B1 EP1172152 B1 EP 1172152B1
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EP
European Patent Office
Prior art keywords
pig
coating
supply
medium
ms2b
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Expired - Lifetime
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EP01114338A
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German (de)
English (en)
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EP1172152A1 (fr
Inventor
Michael Baumann
Thomas Hezel
Kurt Vetter
Frank Herre
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Duerr Systems AG
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Duerr Systems AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
    • B05B5/1616—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material
    • B05B5/1625—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material the insulating means comprising an intermediate container alternately connected to the grounded material source for filling, and then disconnected and electrically insulated therefrom
    • B05B5/1633—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material the insulating means comprising an intermediate container alternately connected to the grounded material source for filling, and then disconnected and electrically insulated therefrom the arrangement comprising several supply lines arranged in parallel, each comprising such an intermediate container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B05B12/1481—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet comprising pigs, i.e. movable elements sealingly received in supply pipes, for separating different fluids, e.g. liquid coating materials from solvent or air

Definitions

  • the invention relates to a method for supplying a coating member and a supply system for the particular electrostatic serial coating of workpieces such as For example, vehicle bodies according to the preamble of the independent Claims. Such a method and a corresponding device is closer from the below DE 197 42 588 known.
  • the prior art is also a feed line for electrical conductive coating material for potential separation with a to clean reciprocating pig body (DE 199 61 271).
  • the object of the invention is a method and a supply system indicate, on the one hand, an exact and as needed during the coating process variable dosage of from the coating member, for example, sprayed material allows and on the other hand in a color change lower Rinsing effort in terms of flushing media and time required as before.
  • the invention has the advantage that for dosing the metering pump required for the coating material does not have to be rinsed with a color change, since it does not is traversed by the coating material. Also for them Ink supply line between the pig stations is not a separate Flushing required as it comes from the insulating medium and / or the pig bodies is cleaned.
  • the paint channel 10 of the atomizer Z is over two parallel to each other the same color supply circuits A or B to each serving as a color supply device color changer FWA or FWB in the usual way connected. Between the paint channel 10 and the supply circuits A, B is each one controlled valve 12A and 12B connected.
  • Another controlled valve 12C is connected to the paint channel 10 of the atomizer Z further for purging the atomizer serving detergent system C connected.
  • Each of the two ink supply circuits A and B exists mainly from one in the immediate vicinity of the atomizer Z arranged first pig station MS1A or MS1B, one in near the relevant color changer FWA or FWB second pig station MS2A or MS2B, one of the leading second pig station to the first pig station Ink supply line ZLA or ZLB and one of the first Scraper station returning to the second pig station Return line RLA or RLB.
  • the supply and return lines each of the two color supply circuits A and B thus form a closed circuit, through its entire course an insulating medium can be conveyed through.
  • Each of the mentioned four pig stations is a double pig station designed to accommodate two pigs.
  • everyone Paint supply circuit A, B contains two pigs, which are labeled M1A and M2A and M1B and M2B, respectively, and between the Both pig stations can be moved back and forth.
  • each of the return lines RLA and RLB is each a metering pump PA or PB connected, the direction of rotation reversible is, so that they either in the opposite direction to the first pig station or in the opposite direction to the second pig station can.
  • the dosing pump PA and the two pig stations MS1A or MS2A of the ink supply circuit A contains the return line RLA depending on a controlled valve V4A or V1A.
  • controlled valves are V4B and V1B, respectively switched into the return line RLB.
  • the two color supply circuits A and B are one of them common Expansion tank 16 for as a sliding medium associated insulating medium associated with the return lines RLA and RLB connected via a respective line 14A and 14B is that, via a respective controlled valve V2A, V3A or V2B, V3B in the illustrated parallel arrangement on the two Pages of the metering pump PA or PB to the relevant Return line RLA or RLB is connected.
  • the expansion tank 16 has a movable volume change Piston which can be acted upon with compressed air on its rear side is.
  • the already mentioned detergent system C contains one of a Supply tank 18, which also has a volume change displaceable, acted upon by compressed air piston has, to the valve 12C leading line 20.
  • Parallel to the Line 20 is to the container 18 as a potential separation path serving piggable insulating line 22 connected, the at its the container 16 end facing a first Pig station 24 and at its one source 26 for detergent (e.g., thinner) a second pig station 25 contains.
  • the workpiece is e.g. a motor vehicle body, with out supplied to the paint supply circuit A through the valve 12A Paint material is coated.
  • Paint material is coated.
  • the first pig M1A in rest position in the first Pig station MS1A. That for painting and for a functional Reserve quantity (still) required paint volume is located in the line section 28 between the first pig station MS1A and the second pig M2A, which corresponds to that at the coating decreasing paint volume on the first pig station too moved.
  • the remainder of the supply line ZLA between the back of the M2A pig and the second pig station MS2A and the entire connected to the feed line Return line RLA are here filled with the insulating medium, that of the metering pump PA with the respective current Paint requirements corresponding, usually variable Production rate towards the second pig station MS2A and is pumped from there into the supply line ZLA and as a sliding medium via the pig M2A located in the line section 28 Paint material in the atomizer Z presses. in this connection the valves V1A and V3A are open while the valves V2A and V4A are closed.
  • the metering pump PA is so fed during the coating from the expansion tank 16, i.e. the applied amount of paint is by sliding medium replaced from the expansion tank 16.
  • the atomizer Z and the paint material in the line section 28 stand during the coating operation under high voltage, while the color changers FWA and FWB are constantly grounded.
  • the required especially for low-resistance paint material Potential separation takes place via the supply circuits A and B.
  • the required hose length of the lines between the two pig stations corresponds to the maximum required Paint volume (including reserve quantity) plus the double insulation required by the respective with insulating medium filled line sections first between the paint column introduced at the second pig station and the first pig station, then between the paint column and both pig stations and finally between the second pig station and the paint column are formed, wherein the latter insulating section during the coating getting bigger and bigger.
  • the metering the charge flow at the atomizer insulating and Sliding medium can be any flowable, preferably liquid medium can be used that electrically non-conductive, compatible with paint, as incompressible as possible and is suitable for the promotion by a metering pump.
  • the two newts of this circle are in the second Pig station MS2B.
  • the entire color supply circuit B is with the serving as a sliding medium insulating medium filled.
  • the extracted Isoliermediummenge is thus by the replenished paint replaces, while the pig M1B moved towards the first pig station MS1B.
  • the inflowing Paint amount is corresponding by the metering pump PB measured their flow rate, and if the desired Volume is filled, the color control valve of Color changer FWB, the valve 30 and the valve V2B closed, while the valve V1B is opened and the valve V4B remains open.
  • the pig M2B sits in Direction to the first pig station MS1B in motion.
  • the between the quantity of paint required for the two pigs becomes atomizer due to the flow rate of the insulating medium Z transported.
  • the pressing process is finished when the first pig M1B has reached the pig station MS1B.
  • the behind The paint column standing by this pig is above the atomizer Z placed on high voltage potential.
  • the for potential separation necessary insulating distance exists at this time between the pig M2B and the second pig station MS2B.
  • the preloaded supply circle B provided coating material has a different color as the previously removed from circle A coating material,
  • the high voltage turned off and rinsed the paint channel 10 of the atomizer, in typical Rotationszerstäubern on the main needle.
  • the rinse is via the line 20 of the detergent system C by displacing the piston of the supply container 16 fed to the atomizer Z.
  • the pig of the detergent system C is in the first during the coating operation Pig station 24 and is during the flushing process by the piston of the supply container 16 in the second pig station 25th pressed. Subsequently, the container 16 can be refilled and then the pig with compressed air in his first pig station 24 be pushed back, so that again the required Insulating distance between the pig stations 24 and 25 consists.
  • An essential advantage of the invention is that when changing colors only the areas of the color changer FWA or FWB, the pig stations MS1A, MS2A or MS1B, MS2B and the Atomizers Z need to be rinsed.
  • the paint material is pressed over the main needle of the atomizer and in the manner already described for circle A. be sprayed. So while the pig M1B in the Pig station MS1B is located, the pig M2B through the insulating medium promoted towards the atomizer Z. The dosage carried out by the pig acted paint material again about the dosage of the insulating medium through the metering pump PB, wherein the valves V1B and V3B open and the Valves V2B and V4B are closed and the applied Paint again through the sliding medium from the expansion tank 16 is replaced.
  • the mentioned return of the two pigs of the circle A in its second pig station MS2A is during the coating operation of the circle B completed.
  • the back promoted Lackreservemenge can in the second pig station MS2A over a valve 32 (shown in MS2B) and a return line disposed of or in a conventional manner in the usual loop of the system.
  • a valve 32 shown in MS2B
  • a return line disposed of or in a conventional manner in the usual loop of the system.
  • each of the two ink supply circuits A and B are each two initiators IN1A and IN2A or IN1B and IN2B provided as shown in one of the respective Minimum isolation distance corresponding to the distance two pig stations are arranged and, for example on appealing the appearance of the newts at the sites concerned Generate monitoring signals. If you like more Initiators variably positionable in front of the entrance of the first Pigging station MS1A or MS1B orders is thus one Self-optimization of the paint reserve quantity possible, i. these Quantity may be due to the coating practice absolutely necessary minimum be reduced.
  • the insulating medium is an electric non-conductive, imcompressible and paint-compatible Be pushing media.
  • the insulating medium used over time can, in particular by mixing with the paint material, can be a continuous or periodic monitoring of the Insulating medium in terms of its conductivity appropriate be. This can be done by direct conductivity measurement or indirectly, for example, by measuring the turbidity of the insulating medium.
  • the insulating medium can be removed from the system and against fresh material to be replaced. This change can be sensibly connected to a flushing process.
  • Pig carcasses are used when these are the inner walls of the strip off any hose or pipeline without residue.
  • the pig would be useful in circles A and B and / or in Flushing system C to use pigs in a tandem arrangement in which the pig between the front and rear sealing edges an open space to the line inner walls to accommodate a simultaneous with the loading promotion the Contains line cleaning detergent.
  • the moles M2A and M2B transported detergent can, for example filled in the second pig station MS2A or MS2B and later in one of the two pig stations of the be rinsed out again circle concerned.
  • FIG. 2 A convenient embodiment of such a pig (e.g. of the pig M2B in FIG. 1) in tandem design is shown in FIG. 2 shown.
  • the tandem pole essentially exists of two preferably the same, generally cylindrical Pig parts 2 and 2 ', by a relatively thin flexible Link 4 in a defined by the gleichsglid Distance A are connected to each other.
  • two pigs of a kind known per se which belong to the Forming a gap with a defined filling volume mechanically connected to each other.
  • Stainless steel wire or a rod made of elastomeric material existing Link 4 is at the facing each other End faces of the mole parts 2, 2 'attached or with them made in one piece.
  • Each pig part 2 or 2 ' has a cylindrical Middle part 6 and at the ends of each a peripheral edge part 7 and 8, the one over the entire circumference of the Inner wall of the line L adjacent sealing edge or Dichtoder Wiper lip has, as it is known with newts is.
  • Inside the middle part 6 of each of the two mole parts 2, 2 ' may be a permanent magnet M or M' are located on the the above-mentioned initiators for pig detection and production of signals, e.g. during the passage of the pig, can appeal.
  • the of the two pig parts 2, 2 ' formed gap 9 has that between the facing each other End faces of the axially inner peripheral edge parts 8 and 8 ', the circumference of the connecting member 4 and the inner wall of Line L defined filling volume for that of the pig the line L to be pushed rinsing or cleaning medium.
  • D is the sealing edge on the pipe or lip of the parts 7, 8 and an outside diameter d of the Link 4 should d be much smaller than D, especially less than half as large, while the distance A preferably not greater than 10 times the diameter D.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Road Signs Or Road Markings (AREA)
  • Elimination Of Static Electricity (AREA)

Claims (15)

  1. Procédé d'alimentation d'un organe de revêtement (Z) pour le revêtement en série de pièces, telles que par exemple des carrosseries de véhicule, avec un matériau de revêtement qui, provenant d'un dispositif d'alimentation (FWA, FWB), est amené à l'organe de revêtement (Z) par une conduite d'amenée (ZLA, ZLB) qui s'étend entre un premier poste de raclage (MS1A, MS1B) se trouvant à proximité de l'organe de revêtement (Z) et un deuxième poste de raclage (MS2A, MS2B) se trouvant à proximité du dispositif d'alimentation (FWA, FWB), le matériau de revêtement étant transporté, dans la quantité volumique prédéterminée pour une opération de revêtement, entre des racles (M1A, M2A ; M1B, M2B) avec un fluide séparé, à travers la conduite d'amenée (ZLA, ZLB), en particulier pour le revêtement électrostatique avec un matériau de revêtement à faible valeur de resistance qui est amené, par un dispositif d'alimentation (FWA, FWB) mis à la terre, à l'organe de revêtement (Z) placé sous haute tension pendant le revêtement, et transporté ici avec un fluide isolant à travers la conduite d'amenée (ZLA, ZLB), caractérisé en ce que le matériau de revêtement est transporté jusqu'à l'organe de revêtement (Z) par une pompe de dosage (PA, PB) à travers laquelle ne circule que le fluide séparé servant de produit de poussée.
  2. Procédé selon la revendication 1, caractérisé en ce que le produit de poussée est transporté par la pompe de dosage (PA, PB) à travers la conduite d'amenée (ZLA, ZLB), en direction du premier poste de raclage (MS1A, MS1B), et de là est renvoyé par une conduite de retour (RLA, RLB) menant au deuxième poste de raclage (MS2A, MS2B).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'au moment de l'introduction du matériau de revêtement entre les deux racles (M1A, M2A ; M1B, M2B), une quantité volumique correspondante du produit de poussée est transportée dans un récipient de compensation (16).
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que les conduites d'amenée et de retour du circuit d'alimentation (A, B) sont remplies d'un fluide isolant, en ce que le matériau de revêtement est introduit au deuxième poste de raclage (MS2A, MS2B) entre les deux racles (M1A, M1B ; M2A, M2B), en ce que le matériau de revêtement, enfermé entre les racles, est transporté à travers la conduite d'amenée (ZLA, ZLB), jusqu'à ce que la racle avant (M1A, M1B) dans le sens du transport atteigne le premier poste de raclage (MS1A, MS1B), à cet instant la longueur du tronçon de conduite rempli de matériau isolant entre la racle arrière (M2A, M2B) et le deuxième poste de raclage (MS2A, MS2B) étant suffisante pour la séparation des potentiels entre l'organe de revêtement (Z) et le dispositif d'alimentation (FWA, FWB), et en ce que le matériau de revêtement est transporté ensuite par la pompe de dosage (PA, PB), à travers le fluide isolant et la racle arrière (M2A, M2B), jusqu'à l'organe de revêtement (Z), tandis que la racle avant (M1A, M1B) reste dans le premier poste de raclage (MS1A, MS1B).
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que les deux racles (M1A, M2A ; M1B, M2B) sont ramenées de la pompe de dosage (PA, PB) refoulant le produit de poussée avec un sens de rotation inversé par rapport au mode de revêtement, à travers la conduite d'amenée (ZLA, ZLB), dans le deuxième poste de raclage (MS2A, MS2B).
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que pendant le revêtement d'une pièce avec un matériau de revêtement provenant de la conduite d'amenée (ZLA) d'un premier circuit d'alimentation (A), un deuxième circuit d'alimentation (B) avec conduites d'amenée et de retour (ZLB, RLB) similaires et postes de raclage (MS1B, MS2B) et une pompe de dosage (BB) est préparé pour une opération de revêtement suivante, le matériau de revêtement du deuxième circuit d'alimentation (B) étant transporté à travers sa conduite d'amenée (ZLB) jusqu'à ce que la racle avant (M1B) atteigne son premier poste de raclage (MS1B).
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que la pompe de dosage (PA, PB) transporte le produit de poussée avec un débit qui varie pendant le revêtement suivant la quantité de matériau de revêtement nécessaire à l'instant considéré.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'on utilise une racle (M1A, M2A, M1B, M2B) qui contient, entre des bords d'étanchéité avant et arrière (8, 8'), un volume intermédiaire (9) ouvert vers les parois intérieures des conduites, pour recevoir un produit de lavage nettoyant la conduite, et en ce que le produit de lavage est introduit dans l'un des postes de raclage (MS2A, MS2B, 24, 25) dans le volume intermédiaire (9) et est à nouveau évacué après utilisation dans l'un des postes de raclage.
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que la conductibilité électrique du produit de poussée isolant est mesurée ou déterminée en continu périodiquement, et le produit de poussée est échangé contre un matériau (9) lorsqu'une valeur de conductibilité prédéterminée est dépassée.
  10. Système d'alimentation pour le revêtement en série, en particulier électrostatique de pièces, telles que par exemple des carrosseries de véhicule, avec un matériau de revêtement en particulier présentant une faible valeur de résistance, qui est amené par un dispositif d'alimentation (FWA, FWB), et provenant d'un organe de revêtement (Z), à travers une conduite d'amenée (ZLA, ZLB), laquelle s'étend entre un premier poste de raclage (MS1A, MS1B) se trouvant à proximité de l'organe de revêtement (Z), et un deuxième poste de raclage (MS2A, MS2B) se trouvant à proximité du dispositif d'alimentation (FWA, FWB), caractérisé en ce que l'extrémité, se trouvant dans le premier poste de raclage (MS1A, MS1B), de la conduite d'amenée (ZLA, ZLB), est reliée, par une conduite de retour (RLA, RLB), à l'extrémité de la conduite d'amenée se trouvant dans le deuxième poste de raclage (MS2A, MS2B), qui contient une pompe de dosage (PA, PB) à travers laquelle ne circule qu'un produit servant de produit de poussée pour le matériau de revêtement.
  11. Système d'alimentation selon la revendication 10, caractérisé en ce que de la conduite de retour (RLA, RLB) part une conduite (14A, 14B) menant à un récipient de compensation (16) pour le produit de poussée.
  12. Système d'alimentation selon la revendication 11, caractérisé en ce que la conduite (14A, 14B), menant au récipient de compensation (16), est raccordée à la conduite de retour (RLA, RLB) par une soupape (V2A, V3A, V2B, V3B) commandable sur chacun des deux côtés de la pompe de dosage (PA, PB), et en ce que la conduite de retour contient des soupapes (V1A, V4A, V1B, V4B) commandables entre la pompe de dosage et les deux postes de raclage (MS1A, MS2A, MS1B, MS2B).
  13. Système d'alimentation selon l'une des revendications 10 à 12, caractérisé en ce que deux circuits d'alimentation (A, B) identiques avec chacun les deux postes de raclage (MS1A, MS2A; MS1B, MS2B), les conduites d'amenée de retour (ZLA, RLA ; ZLB, RLB) et la pompe de dosage (PA, PB) sont raccordées parallèlement à l'organe de revêtement (Z).
  14. Système d'alimentation selon la revendication 13, caractérisé en ce qu'un récipient de compensation (16) commun pour le produit isolant est relié aux deux circuits d'alimentation (A, B).
  15. Système d'alimentation selon l'une des revendications 10 à 14, caractérisé en ce qu'à l'organe de revêtement (Z) est raccordé, pour le lavage en cas de changement de couleur, un système de produit de lavage (C) séparé qui contient une conduite d'amenée de produit de lavage (22) pouvant être raclée entre deux postes de raclage (24, 25), en tant que parcours isolant pour la séparation des potentiels pendant l'opération de revêtement.
EP01114338A 2000-07-13 2001-06-13 Système d'alimentation en peinture avec conduits raclables pour un appareil de revêtement électrostatique Expired - Lifetime EP1172152B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10033987 2000-07-13
DE10033987A DE10033987A1 (de) 2000-07-13 2000-07-13 Verfahren zur Versorgung eines Beschichtungsorgans für die elektrostatische Serienbeschichtung von Werkstücken und Versorgungssystem hierfür

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EP1172152A1 EP1172152A1 (fr) 2002-01-16
EP1172152B1 true EP1172152B1 (fr) 2003-08-20

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EP (1) EP1172152B1 (fr)
AT (1) ATE247527T1 (fr)
DE (2) DE10033987A1 (fr)
ES (1) ES2204785T3 (fr)

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US7584771B2 (en) 2002-05-07 2009-09-08 Durr Systems, Inc. Method and apparatus for delivering paint to an applicator and flushing same
CN102307673A (zh) * 2008-12-23 2012-01-04 Abb公司 涂料穿梭机系统
US10272458B2 (en) 2016-01-08 2019-04-30 J&R Design Systems, Inc. Liquid distribution system and method

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DE10115463A1 (de) 2001-03-29 2002-10-02 Duerr Systems Gmbh Zerstäuber für eine Beschichtungsanlage und Verfahren zu seiner Materialversorgung
DE10115467A1 (de) 2001-03-29 2002-10-02 Duerr Systems Gmbh Werkzeugwechselsystem für eine Maschine
DE10115470A1 (de) 2001-03-29 2002-10-10 Duerr Systems Gmbh Beschichtungsanlage mit einer Zerstäuberwechselstation
DE10115472A1 (de) 2001-03-29 2002-10-10 Duerr Systems Gmbh Ventileinheit für eine elektrostatische Beschichtungsanlage
DE10120272A1 (de) 2001-04-25 2002-10-31 Duerr Systems Gmbh Verfahren zur Betriebssteuerung einer Beschichtungsanlage
DE10145169A1 (de) 2001-09-13 2003-04-03 Duerr Systems Gmbh Verfahren zum serienweisen Beschichten von Werkstücken
DE10157966A1 (de) 2001-11-27 2003-06-05 Duerr Systems Gmbh Verfahren und Versorgungssystem zur dosierten Materialversorgung einer Beschichtungsvorrichtung
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ES2204785T3 (es) 2004-05-01
DE10033987A1 (de) 2002-01-24
DE50100509D1 (de) 2003-09-25
ATE247527T1 (de) 2003-09-15
EP1172152A1 (fr) 2002-01-16

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