EP1222963A2 - Revêtement par pulvérisation et centre de traitement de poudre - Google Patents

Revêtement par pulvérisation et centre de traitement de poudre Download PDF

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Publication number
EP1222963A2
EP1222963A2 EP01128492A EP01128492A EP1222963A2 EP 1222963 A2 EP1222963 A2 EP 1222963A2 EP 01128492 A EP01128492 A EP 01128492A EP 01128492 A EP01128492 A EP 01128492A EP 1222963 A2 EP1222963 A2 EP 1222963A2
Authority
EP
European Patent Office
Prior art keywords
powder
stations
cleaning
spray coating
unit
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.)
Withdrawn
Application number
EP01128492A
Other languages
German (de)
English (en)
Other versions
EP1222963A3 (fr
Inventor
Felix Mauchle
Markus Lenherr
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.)
Gema Switzerland GmbH
Original Assignee
Gema Switzerland GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gema Switzerland GmbH filed Critical Gema Switzerland GmbH
Publication of EP1222963A2 publication Critical patent/EP1222963A2/fr
Publication of EP1222963A3 publication Critical patent/EP1222963A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1472—Powder extracted from a powder container in a direction substantially opposite to gravity by a suction device dipped into the powder

Definitions

  • the invention relates to a spray coating powder center according to the Preamble of claim 1.
  • the invention relates to a spray coating powder center, containing at least two powder stations for one powder container each, at least one injector unit, the at least one injector with a Powder receiving tube, which in a powder container Powder stations can be immersed in order to extract powder from them convey pneumatically to a recipient.
  • a spray coating powder center of this type is known from EP 0 689 875 A2 known. It shows an injector unit with several powder intake tubes are provided with an injector at their lower end. The injector unit is carried by a movement device that a lifting device for Immerse the powder pickup tubes in a powder container or a robot with a robotic arm for moving the injector unit in any Directions (three-dimensional).
  • the injector at the top of the Arrange powder intake tube as it is for example from DE 40 21 674 A1 is known.
  • the object of the invention is to achieve the powder change process to accelerate and the required for powder change Reduce personnel expenses.
  • the spray coating powder center is according to the invention thereby characterized in that at least one cleaning unit is provided, the has at least one compressed air outlet, which at an inlet opening on lower tube end of the powder intake tube is adapted to Cleaning compressed air through the powder intake tube and its injector blow and clean this by the at least one injector unit relative to the powder stations and relative to the at least one Cleaning unit is controlled to move the at least one Injector unit alternatively with one of the powder stations or at least to bring a cleaning unit into operative connection, the at least an injector unit controlled with its at least one powder intake tube alternatively, it can be immersed in a container of the powder stations in order to remove it Convey coating powder, or outside the container with the Cleaning unit is mergable to cleaning compressed air through the to blow through at least one powder receiving tube and its injector.
  • the spray coating powder center can be formed in this way be that the powder stations and the at least one cleaning unit relative are designed to be immovable to one another and the at least one Injector unit controlled at least two, preferably three-dimensionally is designed to be movable.
  • the advantage is that the heavy powder stations no drive device and the cleaning unit only immobile Compressed air lines required.
  • the powder stations are preferably in a straight or circular Row arranged. This simplifies the movements of the Relative movements between the injector unit and the powder stations.
  • the at least one cleaning unit can be in addition to the row of Powder stations can be arranged. This allows short travel distances of the Injector unit can be realized. According to another embodiment, can one cleaning unit each between two or more of the powder stations be arranged in the row of powder stations. This shortens the Travels even more.
  • a special embodiment is that the powder stations in a horizontal dimension of movement are controlled that the at least one injector unit in a vertical movement dimension is controlled controlled, and that the at least one cleaning unit in the Movement dimension of the powder stations is arranged immovably. This reduces the risk of line leaks because the Pneumatic lines of the cleaning unit are not moved and the Injector unit with its pneumatic and powder lines none Must perform rotational movements.
  • the powder stations can be on a horizontal Movable dimension movable table in a straight or circular Be arranged in a row in the horizontal dimension of movement extends. This is an adaptation to the spatial conditions at the location of the Use possible.
  • the table is a turntable, the Center of rotation in the circular center of the circular row of powder stations lies. This embodiment takes up little space and the injector unit need not be arranged rotatably.
  • the at least one cleaning unit under the table on a surface is arranged, which is not movable with the table, and that in Table is formed through at least one vertical through opening through the at least one injector unit and the cleaning unit relative are vertically mergable for cleaning by means of Cleaning compressed air.
  • This can reduce the number of cleaning units be reduced, e.g. B. on a; little space is required; and Compressed air lines and powder lines do not need a relative shift to follow the system parts.
  • the cleaning unit can be moved vertically.
  • an outer surface cleaning device provided with at least one compressed air nozzle, by what cleaning compressed air on the outer surfaces of parts of the injector unit, is blowable at least on the outer surfaces of the powder receiving tubes, if the injector unit in one opposite the cleaning unit Position. This avoids coating powder from these Outside surfaces fall into a powder container and inside Coating powder contaminated.
  • the compressed air cleaning path extends into the Compressed air cleaning pipe blown cleaning compressed air after the Powder intake tube and its injector to the recipient. It needs when changing powder, the powder line, usually a hose, not separately to be cleaned or replaced.
  • Powder change can be carried out if, according to the invention electronic control device is provided which has at least one Computer program for controlling the relative movements between the at least one injector unit, the powder stations and the at least one a cleaning unit, further for the control of the powder feed, the Powder change, and cleaning by means of cleaning compressed air.
  • the control device is preferably free with regard to the computer program programmable so that they can be quickly adapted to customer requirements can.
  • At least the powder stations and the cleaning unit are preferably arranged in a suction cabin, with a filter and blower device for filtering and extracting air from the Extraction cabin is provided in the outside environment. This prevents Coating powder gets into the outside environment.
  • the filter and blower device sucks the air and powder in the Suction cabin preferably arranged transversely to the one in a row Powder stations through these powder stations so no Coating powder gets from powder station to powder station and gets there mix different types of powder.
  • the injector unit when changing from one Powder container to another powder container automatically Cleaning unit driven and cleaned there automatically before they is then moved on to the other powder container.
  • the injector unit will with their powder intake tubes in the powder container in question immersed to pneumatically suck paint from it and to a Spray device or an intermediate container on the way to Promote sprayer.
  • the spray coating powder center shown in Figs. 1 and 2 contains as an example three powder stations 2 for one powder container 4, one Injector unit 6 with, for example, six injectors 8, each with one on it Vacuum area 10 connected powder intake tube 12. Die Powder intake tubes 12 are each in one by lowering the injector unit 6 the powder container 4 can be immersed in order to extract powder therefrom and pneumatically to a receiver, here a spray device 14 to promote.
  • a cleaning unit 16 has at least as many directed upwards Compressed air outlets or compressed air nozzles 18, such as the injector unit 6 Powder intake tubes 12 has.
  • the compressed air nozzles 18 are in the same scheme or arranged in the same matrix and thus to the one facing downwards Inlet opening 20 of the powder receiving tubes 12 adapted that this Powder inlet openings 20 on the compressed air nozzles 18 by lowering the Injector unit 6 can be placed to the cleaning compressed air through the Powder intake tubes 12, their injectors 8 and one each to blow the connected powder hose 22 through the spray device 14 and thereby cleaning these parts after the powder receiving tubes 12 were lifted out of one of the powder containers 4 and before they were put into one other powder container 4 are immersed in order to suck powder therefrom and to supply the spray devices 14.
  • the Injector unit 6 from a movement device 24 three-dimensionally movable (movable or positionable), namely in the two Horizontal dimensions x to and from one of the containers 2, in the y dimension parallel to the container 2 arranged in a straight row, preferably next to this row, to and from the one next to this row Cleaning unit 16, and in the vertical z dimension to the Alternatively, dip the powder intake tubes 12 into one of the containers 2 or to lower the cleaning unit 16, or away from it upwards method.
  • a movement device 24 three-dimensionally movable (movable or positionable), namely in the two Horizontal dimensions x to and from one of the containers 2, in the y dimension parallel to the container 2 arranged in a straight row, preferably next to this row, to and from the one next to this row Cleaning unit 16, and in the vertical z dimension to the Alternatively, dip the powder intake tubes 12 into one of the containers 2 or to lower the cleaning unit 16, or away from it upwards method.
  • the movement device 24 can support the injector unit x slide 26, a y slide 28 carrying this, and this carrying Guide rails 30a and 30b have parallel to the row of Powder containers 4 are arranged, for example on a building floor or on a building ceiling.
  • Spray devices 14 are arranged in a suction cabin 32 which by at least one blower 34 and each blower upstream filter 36 air and powder dust 38 from the suction cabin 32 be vacuumed to remove powder dust and dirt Avoid powder particles and to create a small vacuum that prevents powder dust and powder particles from the suction cabin 32 in the Can penetrate outside environment.
  • the filter and blower device 34, 36 sucks air and powder dust 38a, 38b and 38c across in the suction cabin 32 the powder stations 2 arranged in a row by these powder stations 2 through so that no cross flows of powder container 4 Powder container 4 arise, which is a mixture of different Powder colors could result.
  • a conveying air line 42 for compressed air is connected to each of the injectors 8, which in the vacuum region 10 powder through the powder receiving tube 12th sucked in and pneumatically through the powder hose 22 to the spraying device 14 promotes. Furthermore, the injector with an additional air connection 44 for the Supplying additional compressed air.
  • An outer surface cleaning device 46 is also preferably included at least one compressed air nozzle 48 is provided, through which Cleaning compressed air on the outer surfaces of parts of the injector unit 6, is blowable at least on the outer surfaces of the powder receiving tubes 12, when the injector unit 6 in one of the cleaning unit 16 faces each other lying position.
  • the cleaning compressed air nozzles 48 are preferably arranged so that the powder receiving tubes 12 when lowering and when lifting onto or from the cleaning unit 16 on them is moved past, so that the entire length of these powder receiving tubes of the cleaning compressed air of these compressed air nozzles 48 is cleaned.
  • the Outer surface cleaning device 46 is preferably as shown in FIG. 2 a part of the cleaning unit 16, but can instead also on the Injector unit 6 may be arranged, as shown in FIG. 3, or on part of the Powder stations 2 be attached.
  • a compressed air source 49 is shown in FIG. 2.
  • the powder container 4 can stand on a vibrator or with a vibrator be provided and / or stand on a scale and / or with a Fluidizing device for fluidizing the powder contained in them be provided.
  • the powder container 2 is coating powder over a Powder feed device 50 can be fed automatically, preferably in Dependence on the powder level in the powder container 2, so that the powder level is kept substantially constant.
  • the powder feeders 50 can use a sieve to sieve the powder, a level probe to Level measurement of the powder in the powder container 4, and center for Contain powder recovery from sprayed powder.
  • An electronic control device 52 controls depending on predetermined operating conditions, preferably depending on at least one computer program, the relative movements of the at least one injector unit 6, the powder stations 2 and the at least one a cleaning unit 16 and the outer surface cleaning device 46, furthermore the powder conveyance through the injectors 8, powder change (change of Injector unit 6 from one powder container 4 to another powder container 4 with intermediate cleaning on the cleaning unit 16) and the Cleaning by means of the cleaning compressed air of the cleaning unit 16 and the Outer surface cleaner 46.
  • the control device 52 is preferred with regard to the computer program freely programmable to meet the powder center customer requirements and to be able to quickly adapt to different operating conditions.
  • the Powder stations 2 with the powder containers 4 at least in a horizontal one Movement dimension x or y controlled movable, at least one Injector unit 6 can be moved in a vertical movement dimension z, and the cleaning unit 16 is in the horizontal movement dimension x and / or y of the powder stations 2 arranged immovably.
  • the powder stations 2 or their powder containers on one in one or controlled other of the horizontal movement dimensions x and / or y movable table can be arranged.
  • the arrangement of FIG. 1 is for this usable.
  • the powder stations 2 or their powder containers 4 are on one by one Motor 54 rotatable turntable 56 arranged in a circular row, in whose center is the center of rotation 58 of the turntable 56.
  • the Rotary table 56 can always step by step in the same direction of rotation or, according to another embodiment, be rotated back and forth to thereby each another powder station 2 with its powder container 4 under the non-rotatable arranged injector unit 6 to position.
  • the injector unit 6 is not rotatable by its movement device 124, but only vertically up and down can be moved to the powder intake tubes 12 alternately in one of the Immerse container 4 to suck powder from it, or the Powder receiving tubes 12 through vertical ones formed in the turntable 56 Through openings 60 through to the cleaning compressed air compressed air nozzles 18 of the cleaning unit 16, which is placed under the turntable 56 an underground 62 is arranged.
  • such a vertical one can be located between two powder stations 2 Through opening 60 may be formed in the turntable 56, which is on the same circle as the powder stations 2.
  • the Injector unit 6 only needs of its movement device 124 in the vertical movement dimension z to be moved. Movements of the Injector unit 6 in the x movement dimension can indeed be provided however, are not normally required in this embodiment.
  • the Cleaning unit 16 is not vertically movable or movable.
  • FIGS. 3 and 4 has the same Features and functions as the embodiment of FIGS. 1 and 2 and Corresponding parts are provided with the same reference numbers.

Landscapes

  • Nozzles (AREA)
  • Spray Control Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Coating Apparatus (AREA)
EP01128492A 2001-01-13 2001-12-07 Revêtement par pulvérisation et centre de traitement de poudre Withdrawn EP1222963A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10101366A DE10101366A1 (de) 2001-01-13 2001-01-13 Sprühbeschichtungs-Pulverzentrum
DE10101366 2001-01-13

Publications (2)

Publication Number Publication Date
EP1222963A2 true EP1222963A2 (fr) 2002-07-17
EP1222963A3 EP1222963A3 (fr) 2003-06-11

Family

ID=7670470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01128492A Withdrawn EP1222963A3 (fr) 2001-01-13 2001-12-07 Revêtement par pulvérisation et centre de traitement de poudre

Country Status (5)

Country Link
US (1) US6699325B2 (fr)
EP (1) EP1222963A3 (fr)
JP (1) JP2002282748A (fr)
CA (1) CA2367265C (fr)
DE (1) DE10101366A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004056788A1 (de) * 2004-11-24 2006-06-01 Eisenmann Maschinenbau Gmbh & Co. Kg Verfahren und Anlage zur Beschichtung, insbesondere zum Lackieren, von Gegeständen
EP2218514A1 (fr) * 2009-02-09 2010-08-18 J. Wagner AG Dispositif d'alimentation de poudre de revêtement
WO2019053590A1 (fr) * 2017-09-12 2019-03-21 Carlisle Fluid Technologies, Inc. Système de changement de couleur pour thermolaquage
EP3552713B1 (fr) 2018-04-12 2021-02-17 Wagner International Ag Centre d'alimentation en poudre destiné à l'alimentation d'une installation de revêtement par poudre et procédé de nettoyage du centre d'alimentation en poudre
EP3743216B1 (fr) 2018-01-23 2023-07-05 Gema Switzerland GmbH Centre d'alimentation en poudre à plusieurs couleurs pour l'alimentation en cas de besoin d'au moins un dispositif de pulvérisation de poudre avec une poudre de revêtement de différent types

Families Citing this family (16)

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Publication number Priority date Publication date Assignee Title
DE10253601B4 (de) * 2002-11-15 2013-11-07 Mettler-Toledo Ag Wägemodul mit Vorrichtung zur Staubentfernung
FR2859397B1 (fr) * 2003-09-10 2006-07-28 Eisenmann France Sarl Centrale d'alimentation d'une installation de poudrage electrostatique
EP1773507B1 (fr) 2004-06-03 2012-08-15 Nordson Corporation Changement de couleur pour un systeme d'application de revetement en poudre
US20060219807A1 (en) * 2004-06-03 2006-10-05 Fulkerson Terrence M Color changer for powder coating system with remote activation
JP2009063786A (ja) * 2007-09-06 2009-03-26 Zebiosu:Kk 粉体散布装置
DE102010039473B4 (de) * 2010-08-18 2014-11-20 Gema Switzerland Gmbh Pulverversorgungsvorrichtung für eine Pulverbeschichtungsanlage
KR101509864B1 (ko) 2012-11-07 2015-04-06 (주)엘지하우시스 비산 파우더 크리닝 장치
ITMO20130210A1 (it) * 2013-07-19 2015-01-20 Siver S R L Attrezzatura di alimentazione polveri per la preparazione di vernice
CN103599861B (zh) * 2013-11-07 2015-12-16 中山市君禾机电设备有限公司 一种带粉桶自动清理的快速换色供粉中心
US10124353B1 (en) * 2017-01-17 2018-11-13 The United States Of America As Represented By The Secretary Of The Army Apparatus for deagglomerating and disseminating powders and particulate matter
IT201700047173A1 (it) * 2017-05-02 2018-11-02 Volonte Luigi Carlo Maria Apparato per la verniciatura a polvere e relativo metodo operativo
US11633749B2 (en) 2018-01-23 2023-04-25 Gema Switzerland Gmbh Multicolor powder center for supplying at least one powder spraying device with different types of coating powder as required
JP6973210B2 (ja) * 2018-03-15 2021-11-24 日本製鉄株式会社 ドクターチャンバーコーター
CN108816612B (zh) * 2018-07-19 2019-11-01 湖北省丹江口丹传汽车传动轴有限公司 一种铸件涂料自动喷涂装置
CN111686998B (zh) * 2020-07-20 2023-06-30 华域汽车电动系统有限公司 一种多功能电枢绝缘处理设备
CN113830564B (zh) * 2021-09-02 2022-12-20 中山市君禾机电设备有限公司 粉体输出装置及包含其的供粉中心

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Publication number Priority date Publication date Assignee Title
DE4021674A1 (de) 1990-07-07 1992-01-16 Gema Ransburg Ag Vorrichtung zum pneumatischen foerdern von pulver aus einem behaelter
EP0689875A2 (fr) 1994-07-02 1996-01-03 ITW Gema AG Dispositif pneumatique pour transporter de la poudre, notamment de la poudre de revêtement

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US5271695A (en) * 1990-07-07 1993-12-21 Gema Volstatic Ag Device for pneumatically feeding powder from a container
ATE159000T1 (de) 1993-03-23 1997-10-15 Fluid Management Lp Abgabevorrichtung
JPH07313922A (ja) * 1994-05-24 1995-12-05 I T M Kk 色替用気体搬送粉体供給システム
DE19517229A1 (de) * 1995-05-11 1996-11-14 Gema Volstatic Ag Verfahren und Vorrichtung zur Pulver-Sprühbeschichtung
DE19531421A1 (de) * 1995-08-26 1997-02-27 Gema Volstatic Ag Injektor-Vorrichtung zur Pulver-Sprühbeschichtung
DE29518478U1 (de) * 1995-11-21 1996-01-18 PROTEC Automatisierungssysteme GmbH, 32257 Bünde Pulverförderinjektor
JP3867176B2 (ja) * 1996-09-24 2007-01-10 アール・アイ・ディー株式会社 粉体質量流量測定装置、およびこれを適用した静電粉体塗装装置
US6056483A (en) * 1997-09-10 2000-05-02 Nihon Parkerizing Co., Ltd. Powder coating material feeding apparatus
DE19823068A1 (de) 1998-05-22 1999-11-25 Erich Kraemer Pulverversorgungssystem für Pulverbeschichtungsanlage
EP1328352A2 (fr) * 1999-09-17 2003-07-23 Nordson Corporation Systeme d'application de poudre a changement de couleur rapide

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4021674A1 (de) 1990-07-07 1992-01-16 Gema Ransburg Ag Vorrichtung zum pneumatischen foerdern von pulver aus einem behaelter
EP0689875A2 (fr) 1994-07-02 1996-01-03 ITW Gema AG Dispositif pneumatique pour transporter de la poudre, notamment de la poudre de revêtement

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004056788A1 (de) * 2004-11-24 2006-06-01 Eisenmann Maschinenbau Gmbh & Co. Kg Verfahren und Anlage zur Beschichtung, insbesondere zum Lackieren, von Gegeständen
DE102004056788B4 (de) * 2004-11-24 2009-01-29 Eisenmann Anlagenbau Gmbh & Co. Kg Verfahren und Anlage zum Beschichten von Gegenständen
EP2218514A1 (fr) * 2009-02-09 2010-08-18 J. Wagner AG Dispositif d'alimentation de poudre de revêtement
US8444351B2 (en) 2009-02-09 2013-05-21 J. Wagner Ag Coating-powder-supply apparatus
US8967429B2 (en) 2009-02-09 2015-03-03 J. Wagner Ag Coating-powder-supply apparatus
WO2019053590A1 (fr) * 2017-09-12 2019-03-21 Carlisle Fluid Technologies, Inc. Système de changement de couleur pour thermolaquage
CN111315495A (zh) * 2017-09-12 2020-06-19 卡莱流体技术有限公司 用于粉末涂料的颜色更换系统
US11850614B2 (en) 2017-09-12 2023-12-26 Carlisle Fluid Technologies, LLC Colour change system for powder coating
EP3743216B1 (fr) 2018-01-23 2023-07-05 Gema Switzerland GmbH Centre d'alimentation en poudre à plusieurs couleurs pour l'alimentation en cas de besoin d'au moins un dispositif de pulvérisation de poudre avec une poudre de revêtement de différent types
EP3552713B1 (fr) 2018-04-12 2021-02-17 Wagner International Ag Centre d'alimentation en poudre destiné à l'alimentation d'une installation de revêtement par poudre et procédé de nettoyage du centre d'alimentation en poudre

Also Published As

Publication number Publication date
DE10101366A1 (de) 2002-08-08
CA2367265A1 (fr) 2002-07-13
US6699325B2 (en) 2004-03-02
JP2002282748A (ja) 2002-10-02
CA2367265C (fr) 2006-11-07
US20020092468A1 (en) 2002-07-18
EP1222963A3 (fr) 2003-06-11

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