EP0857516A2 - Apparatus and method for coating articles - Google Patents
Apparatus and method for coating articles Download PDFInfo
- Publication number
- EP0857516A2 EP0857516A2 EP98102284A EP98102284A EP0857516A2 EP 0857516 A2 EP0857516 A2 EP 0857516A2 EP 98102284 A EP98102284 A EP 98102284A EP 98102284 A EP98102284 A EP 98102284A EP 0857516 A2 EP0857516 A2 EP 0857516A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- articles
- coating
- hook
- basket
- 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- Withdrawn
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/08—Drying solid materials or objects by processes not involving the application of heat by centrifugal treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
- B05C3/09—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles
- B05C3/10—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles the articles being moved through the liquid or other fluent material
Definitions
- This invention relates to apparatus for coating articles, primarily but not exclusively, to apparatus for coating metal articles, and to a method of coating articles.
- metal will be used henceforth, it should be understood that the term is intended to encompass other materials.
- metal articles may be coated, with paint, varnish, corrosion resistant formulations and the like, such techniques including dipping, spraying, powder coating, and electroplating.
- Such techniques generally impart an acceptable coating to the articles, but a preferred technique has been found to be centrifugal coating, whereby the articles to be coated are placed in a rotatable container such as a perforated basket, a coating material such as paint is applied to the articles, by dipping the basket and articles into a paint reservoir, and the basket is then removed from the paint reservoir and rotated at high speed about a generally vertical axis to remove excess paint from the articles and to ensure that a generally uniform thickness of paint is applied thereto.
- a rotatable container such as a perforated basket
- a coating material such as paint
- the articles are often relatively heavy, and it is often the case that when loaded the distribution of articles therein will be uneven.
- the basket is rotated about a vertical axis at high speed, which may exceed 2500 rpm, significant "wobble" may exist, putting considerable strain on a mounting to which an upper part of the basket is secured.
- apparatus for coating articles comprising a support structure, a container to contain the articles, container support means and means to rotate the container wherein resilient means are provided to connect the container support means to the support structure.
- the container support means is connected to or forms part of drive means associated with the means to rotate the container.
- the container support means comprises a plate like member on which the means to rotate the container and its drive means are mounted.
- the resilient means preferably comprises a coil spring, one end of which is attached to the container support means, the other end of which is attached to the support structure, which may be in the form of a frame assembly, support beam, or the other suitable construction.
- more than one resilient means is provided, and conveniently, four coil springs may be provided in a generally cruciform arrangement, and lying in a generally horizontal plane, by which the container support means is mounted to the support.
- the springs are preferably metallic but may equally be formed from other suitable materials, such as plastics materials, if desired.
- the means to rotate the container preferably comprises a motor, and conveniently, comprises an air motor, driven by compressed air.
- the air motor preferably connected to a compressed air source by a flexible hose.
- the motor is preferably generally vertically oriented, such that a drive shaft rotated by the motor extends generally vertically, and downwardly, from the motor towards the container.
- guide members integral with or secured to the container support means through which the drive shaft from the motor passes.
- the guide members comprise a first part, which in use is firmly secured to the drive shaft and a second part, relative to which the first part may rotate, such that in use, the weight of the container attached to a lower part of the drive shaft is at least partly supported by the guide members, rather than by the motor alone.
- the guide members comprise plummer blocks.
- the container is preferably in the form of a basket, by which it is meant that the container comprises a plurality of apertures in at least the side thereof, and conveniently also in the base, the motor being connected to the container by means of the rotatable drive shaft.
- the shaft may comprise a hook at the lower end thereof, which hook in use engages with a receiving formation located on an upper part of the container such as an inverted U-shaped arm or carrying handle.
- a hook comprising a channel adapted to receive part of an article to be held by the hook, the channel comprising a first part having a first width, and a second part, having a second width, wherein the second width is greater than the first width.
- the first part may be generally straight, such that the first part comprises generally parallel extending inner side walls, whereas the second part may be generally circular in cross section, such that the diameter of the cross section is greater than the shortest distance between the inner side walls of the first part.
- the hook is effectively provided with shoulder formations, which restrict upward movement of the article, relative to the hook.
- the hook preferably comprises a recess in the first part, and conveniently, the hook comprises a recess in each side wall of the first part.
- the hook is cut from steel plate, conveniently of approximately 1-1.5 cm thickness.
- the apparatus preferably also comprises a reservoir adapted to contain a liquid with which the articles are to be coated.
- the reservoir is preferably located generally beneath the container, and there is preferably provided means to induce generally vertical relative movement between the reservoir and the container.
- the means may comprise a moveable platform, hoist, table or the like, whereby the reservoir, containing the required liquid, may be raised up to a point at which the liquid contained therein comes into contact with the articles in the container, thus applying the liquid to the articles.
- the platform or hoist may be raised/lowered by any convenient means, although preferably, hydraulic means is utilised.
- the apparatus may comprise means to lower the container towards the reservoir below, and to subsequently raise the container prior to commencement rotation thereof.
- means is preferably hydraulic.
- a method of coating articles comprising placing the articles in a container, applying liquid to the articles, rotating the container to remove excess liquid from the articles, and placing the articles in a heated environment, wherein the articles remain in the container when placed in the heated environment.
- the heated environment is preferably provided by an oven, conveniently an airless oven.
- the liquid may comprise paint, a corrosion resistant formulation, or other metal protective composition, such as are used during centrifugal coating of articles.
- the coating and heating operations may be repeated.
- apparatus for coating articles comprising coating means, whereby liquid is applied to articles in a container, heating means, whereby heat is imparted to the articles in the container, and conveying means whereby the container is conveyed from the coating means to the heating means.
- the coating means preferably comprises centrifugal coating apparatus, conveniently such as that described in relation to the first aspect of the invention.
- the conveying means may comprise a conveyor belt arrangement, but preferably, comprises a chain conveyor having attached thereto a plurality of engaging formations such as hooks, to which upper parts of the containers may be attached.
- the conveying means extends into the heating means.
- the chain conveyor may be in the form of a loop, whereby containers containing articles may be attached to the chain at a position adjacent the coating means, transported via the chain to an into the heating means, and subsequently returned from the heating means to the coating means.
- the coating and heating operation may be repeated.
- the containers and articles may be removed from the chain shortly after the heating operation if no further coating is required.
- a centrifugal coating assembly generally indicated at 10 comprising a support structure in the form of an overhead frame assembly 11 consisting of beams 12, 13, 14 and 15, located generally centrally of which is an air motor 16, attached to a container support plate 21, which is suspended between the beams by four metal coil springs 17.
- the air motor 16 is connected to a source of compressed air 16 a by a flexible hose 16 b .
- the plate 21 is connected to the springs through nylon bushes (not shown).
- a drive shaft 18 Connected to a lower portion of the air motor 16 is a drive shaft 18, which passes through plummer blocks 19 and 20 which are connected to the support plate 21, the plummer blocks serving to restrict sideways movement of the shaft 18 during rotation thereof, and to take a large portion of the weight of the container attached to the shaft 18.
- the lower end of the shaft 18 is provided with an upturned hook 22 to which, in use, is connected a basket 23 having a handle 24 under which the hook passes.
- a paint bath 25 containing paint 26 there is provided beneath the basket a paint bath 25 containing paint 26, the bath being provided on a moveable platform 27, which may be raised or lowered in a conventional manner by use of hydraulic or pneumatic arrangement.
- the bath is lowered to a height at which the basket is no longer in contact with the paint 26, but at which the side walls of the bath extend above the level of the articles 28 contained within the basket.
- the basket is then rotated at high speed, for example, 2500 rpm, to remove excess paint from the articles, which allows a generally uniform coating of paint on the articles to be obtained, in conventional manner.
- the basket may be unevenly loaded with articles, the basket is subjected to uneven downwardly extending forces, which when the basket is rotated, can cause significant wobble to occur to the basket, and thus to the shaft and air motor, which has hitherto been overcome by rigidly mounting the motor assembly to the frame assembly 11.
- FIG. 2 part of the assembly shown in Figure 1 is shown in side view.
- the air motor 16 is mounted to the support plate 21 by a generally L-shaped foot 60, the lower part of which is attached to the plate by screws 61 and 62.
- the drive shaft 18 may be connected to the air motor via a universal joint 63, which conveniently is a rubber, or other flexible universal joint.
- the hook 22 is generally of U-shaped construction, comprising a top 64 and U arms 65 and 66.
- a channel 67 extending into the hook, has an inlet 68 and a seat 69 which in use is occupied by an arm of the container which is supported by the hook.
- the generally vertically orientated part of the channel 67 comprises inner side walls 70 and 71, which extend generally parallel to each other.
- the seat 69 is part circular in cross section, the diameter thereof being greater than the distance between the parallel extending side walls 70 and 71. Furthermore, there is provided a recess 73 in the side wall 70.
- a coating assembly 50 which includes a centrifugal coating arrangement such as, for example, that described in relation to Figures 1 and 2.
- a chain conveyor arrangement 51 which carries the baskets towards and into an airless oven 52 through an entrance 53, in which oven the paint is at least partially dried.
- the baskets exit the oven through an exit 54, and are then transferred back towards the coating assembly 50, where the process may be repeated if required.
- the coating assembly 50 there may be provided in the coating assembly 50, more than one centrifugal assemblies of the type generally shown at 10 in Figure 1, and conveniently, there may be provided three such centrifugal assemblies, thus enabling a greater number of articles to be coated in a given time.
- centrifugal assemblies may be connected to a common source of comprises air, but preferably, each is independently controlled such that the containers associated therewith mat be caused to rotate at different speeds, which may be desirable in vie of differing articles contained therein, or differing compositions to be applied to the articles.
- the complete centrifugal coating process is preferably automated such that by operation of a single switch which is spaced from the coating assembly 50, the moveable platform 27, on which rests the paint bath 25 is first raised so as to submerse the container and articles in the paint 26, maintained at the raised height for a sufficient time for paint to be imparted to the articles (approximately 2 seconds has been found to be sufficient), and subsequently lowered to a position at which the basket no longer contacts the paint but at which the side walls of the paint bath extend above the level of the articles contained within the basket.
- the automated procedure is then such that rotation of the baskets commences, continues for a present length of time, and then ceases.
- the procedure may also involve the raising and lowering of a safety screen located towards the front of the centrifugal assembly, such that during rotation of the baskets, an operator is shielded from any articles which may conceivably be ejected from the baskets, or, in the event of failure of the basket or drive shaft, from any other parts which may be ejected from the assembly at high speeds.
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims (13)
- Apparatus (10) for coating articles (28), comprising a support structure (11), a container (23) to contain the articles (28), container support means (21) and means (16a) to rotate the container;
characterised in that resilient means (17) are provided to connect the container support means (21) to the support structure (11). - Apparatus according to Claim 1 wherein the resilient means (17) comprises a coil spring (17).
- Apparatus according to Claim 2 wherein four coil springs (17) are provided in a generally cruciform arrangement.
- Apparatus according to any one of the preceding Claims wherein the means to rotate the container comprises an air motor (16).
- Apparatus according to Claim 5 wherein the air motor (16) is generally vertically orientated.
- Apparatus according to Claim 4 or Claim 5 comprising guide members (19,20), integral with or secured to the container support means (21), and through which a drive shaft (18) extending from the motor (16) may pass.
- Apparatus according to Claim 6 wherein the guide members (19, 20) comprise a first part, which in use is firmly secured to the drive shaft (18), and a second part which is integral with or secured to the container support means (21), and relative to which the first part may rotate.
- Apparatus according to Claim 6 or Claim 7 wherein the guide members (19, 20) comprise plummer blocks.
- A hook (22) comprising a channel (67) adapted to receive part of an article to be held by the hook, the channel (67) comprising a first part (70, 71) having a first width, and a second part (69), having a second width, wherein the second width is greater than the first width.
- A hook (22) according to Claim 9 wherein the first part comprises generally parallel extending inner side walls (70, 71), and wherein the second part (69) is generally circular in cross-section, the diameter of the second part (69) being greater than the distance between the side walls (70, 71) of the first part.
- A hook (22) according to Claim 9 or Claim 10 comprising a recess (73) in the first part.
- A method of coating articles (28) comprising placing the articles in a container (23), applying liquid (26) to the articles (28), rotating the container (23) to remove excess liquid from the articles (28), and placing the articles in a heated environment (52), wherein the articles (28) remain in the container (23) when placed in the heated environment (52).
- Apparatus for coating articles (28), comprising coating means (10) whereby liquid (26) is applied to articles in a container (23), heating means (52) whereby heat is imparted to the articles (28) in the container (23), and conveying means (51) whereby the container (23) is conveyed from the coating means (10) to the heating means (52).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9702775A GB2321864B (en) | 1997-02-11 | 1997-02-11 | Apparatus and method for removing excess liquid from articles |
GB9702775 | 1997-02-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0857516A2 true EP0857516A2 (en) | 1998-08-12 |
EP0857516A3 EP0857516A3 (en) | 1999-05-19 |
Family
ID=10807433
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98102284A Withdrawn EP0857516A3 (en) | 1997-02-11 | 1998-02-10 | Apparatus and method for coating articles |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0857516A3 (en) |
GB (1) | GB2321864B (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1279751A1 (en) * | 2001-07-28 | 2003-01-29 | Aluminal Oberflächtentechnik GmbH & Co. KG | Apparatus for galvanic deposition of aluminium or aluminium alloys from metallorganic aluminium alkyl containing electrolytes |
WO2004073885A1 (en) * | 2003-02-19 | 2004-09-02 | Surmodics, Inc. | Grafting appartus and method of using |
WO2007070511A1 (en) * | 2005-12-12 | 2007-06-21 | Envirodyne Technologies, Inc. | Flow-through dip-spin coating method and system therefor |
US9308355B2 (en) | 2012-06-01 | 2016-04-12 | Surmodies, Inc. | Apparatus and methods for coating medical devices |
CN106000800A (en) * | 2016-05-30 | 2016-10-12 | 芜湖众源复合新材料有限公司 | Device for Dacromet coating liquid dip-coating and spin-drying of contact net steel plate |
WO2016182107A1 (en) * | 2015-05-13 | 2016-11-17 | 한국표준과학연구원 | Substrate dipping device |
US9827401B2 (en) | 2012-06-01 | 2017-11-28 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
CN108180702A (en) * | 2017-12-25 | 2018-06-19 | 福建浔兴拉链科技股份有限公司 | A kind of plating pull head drying equipment |
CN111799969A (en) * | 2020-08-19 | 2020-10-20 | 全南县超亚科技有限公司 | Paint dipping device for micro motor production and processing |
US11090468B2 (en) | 2012-10-25 | 2021-08-17 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
CN113560143A (en) * | 2021-08-11 | 2021-10-29 | 成都秦川物联网科技股份有限公司 | Dynamic seal ring transfer system and transfer method for Internet of things intelligent gas meter speed reducer |
CN114985195A (en) * | 2022-06-02 | 2022-09-02 | 潍坊学院 | In-situ drying and dipping substrate film forming device and forming method thereof |
US11628466B2 (en) | 2018-11-29 | 2023-04-18 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
US11819590B2 (en) | 2019-05-13 | 2023-11-21 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
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CN102874679B (en) * | 2012-09-18 | 2015-06-10 | 纽科伦(新乡)起重机有限公司 | Vibrating lifting appliance and crane with same |
CN104772260B (en) * | 2015-04-07 | 2017-01-04 | 东莞市联洲知识产权运营管理有限公司 | A kind of antirust treatment equipment |
CN107166884A (en) * | 2017-07-19 | 2017-09-15 | 唐晓磊 | Vacuum freeze drier |
CN110631330A (en) * | 2019-10-23 | 2019-12-31 | 海盐建浩金属股份有限公司 | Disc element gap waste liquid removing device |
CN112495694B (en) * | 2020-12-02 | 2022-03-11 | 苏州麦德迅医疗科技有限公司 | Adhesive attaching device |
CN112923689B (en) * | 2021-02-07 | 2022-10-18 | 长江师范学院 | Heat pump drying chamber |
Family Cites Families (6)
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US3659550A (en) * | 1970-11-09 | 1972-05-02 | Spring Tools Corp | Fluid operated coating and drying machine |
FR2228982A1 (en) * | 1973-05-07 | 1974-12-06 | Fives Lille Cail | Bearing suspension for centrifugal dryer - damps oscillations at critical speed with variable rate springs |
DE2737917C2 (en) * | 1977-08-23 | 1984-04-26 | Hübers & Meier, 4190 Bocholt | Impregnation device equipped with a centrifuge |
US4938840A (en) * | 1989-04-19 | 1990-07-03 | Schaechter Friedrich | Uniform treatment of large quantities of small parts |
JPH04247251A (en) * | 1991-01-31 | 1992-09-03 | Toshiba Corp | Solid-liquid separator |
JP2980528B2 (en) * | 1994-12-26 | 1999-11-22 | 川崎製鉄株式会社 | Dross separator in hot metal plating bath |
-
1997
- 1997-02-11 GB GB9702775A patent/GB2321864B/en not_active Expired - Fee Related
-
1998
- 1998-02-10 EP EP98102284A patent/EP0857516A3/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
None |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1279751A1 (en) * | 2001-07-28 | 2003-01-29 | Aluminal Oberflächtentechnik GmbH & Co. KG | Apparatus for galvanic deposition of aluminium or aluminium alloys from metallorganic aluminium alkyl containing electrolytes |
WO2003012176A1 (en) * | 2001-07-28 | 2003-02-13 | Aluminal Oberflächentechnik Gmbh & Co. Kg | Device for the electrodeposition of aluminium or aluminium alloys from organometallic electrolytes containing aluminium alkyl |
CZ297865B6 (en) * | 2001-07-28 | 2007-04-18 | Aluminal Oberflächentechnik Gmbh & Co. Kg | Device for electrolytic deposition of aluminium or aluminium alloys from organometallic electrolytes |
KR100867354B1 (en) * | 2001-07-28 | 2008-11-07 | 알루미날 오베르플라켄테크니크 게엠베하 & 코. 케이지 | Device for the Electrodeposition of Aluminium or Aluminium Alloys from Organometallic Electrolytes Containing Aluminium Alkyl |
WO2004073885A1 (en) * | 2003-02-19 | 2004-09-02 | Surmodics, Inc. | Grafting appartus and method of using |
US7041174B2 (en) | 2003-02-19 | 2006-05-09 | Sunmodics,Inc. | Grafting apparatus and method of using |
JP2006518278A (en) * | 2003-02-19 | 2006-08-10 | サーモディックス,インコーポレイティド | Grafting device and method of use |
US7883749B2 (en) | 2003-02-19 | 2011-02-08 | Surmodics, Inc. | Method for coating an object with a graft polymer layer |
US8318263B2 (en) | 2003-02-19 | 2012-11-27 | Surmodics, Inc. | Method for coating an object with a graft polymer layer |
WO2007070511A1 (en) * | 2005-12-12 | 2007-06-21 | Envirodyne Technologies, Inc. | Flow-through dip-spin coating method and system therefor |
US10507309B2 (en) | 2012-06-01 | 2019-12-17 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
US9827401B2 (en) | 2012-06-01 | 2017-11-28 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
US9308355B2 (en) | 2012-06-01 | 2016-04-12 | Surmodies, Inc. | Apparatus and methods for coating medical devices |
US9623215B2 (en) | 2012-06-01 | 2017-04-18 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
US10099041B2 (en) | 2012-06-01 | 2018-10-16 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
US11090468B2 (en) | 2012-10-25 | 2021-08-17 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
US9795982B2 (en) | 2015-05-13 | 2017-10-24 | Korea Research Institute Of Standards And Science | Apparatus for dipping substrate |
WO2016182107A1 (en) * | 2015-05-13 | 2016-11-17 | 한국표준과학연구원 | Substrate dipping device |
CN106000800A (en) * | 2016-05-30 | 2016-10-12 | 芜湖众源复合新材料有限公司 | Device for Dacromet coating liquid dip-coating and spin-drying of contact net steel plate |
CN108180702A (en) * | 2017-12-25 | 2018-06-19 | 福建浔兴拉链科技股份有限公司 | A kind of plating pull head drying equipment |
US11628466B2 (en) | 2018-11-29 | 2023-04-18 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
US11819590B2 (en) | 2019-05-13 | 2023-11-21 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
CN111799969A (en) * | 2020-08-19 | 2020-10-20 | 全南县超亚科技有限公司 | Paint dipping device for micro motor production and processing |
CN113560143A (en) * | 2021-08-11 | 2021-10-29 | 成都秦川物联网科技股份有限公司 | Dynamic seal ring transfer system and transfer method for Internet of things intelligent gas meter speed reducer |
CN114985195A (en) * | 2022-06-02 | 2022-09-02 | 潍坊学院 | In-situ drying and dipping substrate film forming device and forming method thereof |
CN114985195B (en) * | 2022-06-02 | 2023-03-14 | 潍坊学院 | In-situ drying and dipping substrate film forming device and forming method thereof |
Also Published As
Publication number | Publication date |
---|---|
GB2321864A (en) | 1998-08-12 |
GB9702775D0 (en) | 1997-04-02 |
EP0857516A3 (en) | 1999-05-19 |
GB2321864B (en) | 2001-05-30 |
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