EP1507707B1 - Dispositif permettant de sceller des recipients en forme de coupes ou de pots - Google Patents

Dispositif permettant de sceller des recipients en forme de coupes ou de pots Download PDF

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Publication number
EP1507707B1
EP1507707B1 EP03752703A EP03752703A EP1507707B1 EP 1507707 B1 EP1507707 B1 EP 1507707B1 EP 03752703 A EP03752703 A EP 03752703A EP 03752703 A EP03752703 A EP 03752703A EP 1507707 B1 EP1507707 B1 EP 1507707B1
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EP
European Patent Office
Prior art keywords
plate
sealing
sealing head
contour
head
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
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EP03752703A
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German (de)
English (en)
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EP1507707A1 (fr
Inventor
Michael Bräutigam
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2842—Securing closures on containers
    • B65B7/2878—Securing closures on containers by heat-sealing

Definitions

  • the invention relates to a device for sealing cup-shaped or cup-shaped containers, such as Bliesterpacks or cups for storing dairy products, such as yogurt, quark or creamer, with a sealing head, which has a sealed contour carrier and a heatable sealing contour, a support plate with at least one guide pin, which enables a linear displacement of the sealing head relative to the carrier plate, at least one spring element which acts on the sealing head with a force away from the carrier plate, a spring bearing plate which is arranged between the sealing head and the carrier plate and in the same direction as the sealing head is linearly displaceable, and at which the sealing head facing end of the spring element is applied and a sealing element associated with the sealing head, which allows a tilting of the sealing contour carrier about the axes perpendicular to said guide pin axes.
  • a sealing head which has a sealed contour carrier and a heatable sealing contour
  • a support plate with at least one guide pin which enables a linear displacement of the sealing head relative to the carrier plate
  • Bliesterpacks are used for packaging of small parts, such as tablets, pills or buttons, but also sensitive and relatively expensive items such as contact lenses or electronic components.
  • the said packs consist of a more stable plastic shell with bulges, in which the parts to be stored are stored, and a cover sheet, which hermetically seals the bulges.
  • the cover film is glued to the shell in the majority of cases and accordingly has an adhesive layer, which is usually thermally activated. The strength of the bond and / or the cover sheet adjusted so that the cover sheet on the one hand sufficiently firmly adhered to the shell, on the other hand can be demolished by the shell but also.
  • pasty foods which are dispensed in comparatively small portions, kept in containers, which are closed by an easily removable cover sheet.
  • Such packaging can be found for example in yogurt, cottage cheese, creamer or ready-made pudding.
  • cover sheet sealing devices For applying the cover sheet sealing devices are used, which generally have several heatable sealing contours.
  • the sealing contours thereby falls the task to press the cover sheet with a defined force along the contour of the shell or the cup edge and to glue the cover sheet to the container due to their predetermined higher temperature.
  • sealing is understood as meaning processes in which openings in containers are closed by films.
  • the general usage sometimes includes the terms welding or gluing.
  • a device for sealing Bliesterpacks which consists essentially of a carrier plate and a plurality of sealing heads.
  • the support plate bores in which run guide bolts, which in turn are each firmly connected to a sealing head.
  • This embodiment allows a linear displacement of the head relative to the support plate, wherein arranged between the head and support plate, each comprising the bolts springs act on the sealing heads each with a directed away from the support plate spring force.
  • the sealing heads each carry a heatable sealing contour plate on their end face directed away from the carrier plate.
  • the heater is designed as a semiconductor resistance heating and firmly integrated into the sealing contour plate.
  • the determination of the sealing contour plate on the sealing head by means of a gimbal joint, which is formed in the present case as a ball which is arranged between two plate-shaped elements of the sealing head. The ball allows a tilting of the sealing contour plate by small angles, but also a rotation of the sealing contour plate about an axis perpendicular to the contour axis.
  • Sealing heads and carrier plate form a unit, which is placed on the cover sheet of the Bliesterpacks to carry out the sealing.
  • the sealing heads come to rest after placing the sealing contour on the film, while the support plate is still moved so far relative to the sealing head until the lying between the support plate and sealing elements spring elements produce the desired contact pressure of the sealing contours on the cover sheet.
  • the present device according to the prior art has several disadvantages, which lead to frequent disturbances and the stoppage of the packaging system.
  • the linear guide the sealing heads by guide pins one end of which is attached to the respective sealing head and the other end runs in each case in a bore of the support plate, has also not been successful.
  • the unit of sealing head and guide pin has a long, ranging from the sealing contour to the leading holes in the support plate lever arm. A slight clearance between the bore and guide pin therefore causes the sealing contour can perform significant lateral movements. These movements also prevent an exact alignment of the sealing contour relative to the bulge in the lower plastic shell.
  • the long lever arm also causes tilting of the guide pins can occur in the guide holes.
  • the tilting cause increased friction between the bolt and bore, the size of which, however, is undefined.
  • the contact pressure of the sealing contour on the cover sheet is variable from contour to contour as well as in one and the same contour from operation to operation fluctuates. The quality of the seal is thereby reduced disadvantageously.
  • the invention has the object to provide a device for sealing Bliesterpacks, which avoids the disadvantages mentioned, allows a simple and quick adjustment of the contact pressure of the sealing contour, an improved Seal quality and has a low susceptibility to failure and correspondingly low cost of repair and maintenance.
  • the device according to an advantageous embodiment is based on sealing devices according to the prior art, which are equipped with guide pins and spring elements which comprise the bolts and are arranged between the carrier plate and a spring bearing plate adjacent to the sealing head.
  • the spring bearing plate is provided with holes in the device according to the invention, so that they can move relative to and along the guide pins, and - in the same way as the sealing head - can perform a linear displacement. The position of the spring bearing plate relative to the carrier plate determines the length of a spring element and thus its bias.
  • the spring bearing plate is designed so that its position is adjustable.
  • a freely accessible adjusting element is provided between the sealing head and spring bearing plate, by means of which the distance between the spring bearing plate relative to the sealing head and thus also relative to the carrier plate is changeable.
  • a displacement of the bearing plate in the direction of the carrier plate leads to an increase, a shift away from the carrier plate to a lowering of the spring preload.
  • the spring preload in turn determines after placing the sealing head on the cover sheet of Bliesterpackung the pressure exerted by the sealing contour on the cover sheet contact pressure.
  • the said adjusting element thus makes it possible to fix the contact pressure existing during the sealing and to carry out the fixing quickly and easily.
  • this adjustment is freely accessible, so that the adjustment of the contact pressure can be done in the installed state of the sealing head.
  • said adjusting element comprises a one-armed lever which is articulated on the sealing head (or the spring bearing plate), wherein the first lever arm with its free end against the spring bearing plate (or the sealing head) and the second. Press lever arm with its free end against an adjusting screw.
  • the adjusting screw is arranged so that it is operable from the carrier plate facing away from the end face of the sealing head.
  • the articulation point of the lever is arranged in an edge region of the sealing head and the adjusting screw in the opposite edge region of the sealing head and the free end of a lever arm in the region of the sealing head axis lies.
  • the design of the adjusting screw allows numerous possibilities.
  • a solution in which the adjusting screw comprises a displaceable in the direction of the axis of the cylinder pin and a threaded pin with hexagon head.
  • the cylindrical pin is arranged between the said lever and the said threaded pin, while the threaded pin protrudes from the associated threaded bore and in the region of the head with a lock nut can be fixed.
  • only a few steps are necessary to adjust the spring preload in an advantageous manner. They consist of loosening the lock nut, adjusting the set screw by the required number of turns and then fixing the lock nut again.
  • the seal contour carrier must ensure that the seal contour is always aligned parallel to the surface of the cover sheet under all working conditions. Accordingly, the sealing devices usually have a joint element that allows tilting of the sealing contour plate by small angles.
  • this element is formed according to a feature of the invention as a rubber bearing, with two metal plates and an intermediate rubber layer, wherein the plates are vulcanized or glued.
  • This design of the joint element allows on the one hand a tilting of the sealing contour in all directions perpendicular to the longitudinal axis of the sealing head, but on the other hand does not allow any rotation of the contour about the said longitudinal axis.
  • the proposed solution thus ensures that the sealing contour is always aligned parallel to the surface of the cover sheet and in the azimuthal direction always has an exact alignment relative to the bulge in the lower plastic shell. Both properties mean that with the device according to the present invention high-quality seals can be produced.
  • each bolt is provided with a groove with vane tail edge, which serve to fix the rubber bearing on the adjacent elements.
  • at least one threaded screw is provided in the sealing head and in the sealing contour carrier which can be screwed against said flank.
  • Bolt, dovetail groove and said screws together constitute a quick-release system, which allows a simple and secure fixing of the rubber bearing to its neighboring elements by simple means.
  • the proposed structural measures bring in particular the advantage that the rubber bearing is easily replaceable in case of repair.
  • the disclosed quick-release system additionally provides a safeguard against rotation of the rubber mount.
  • a bore is mounted in each of the metal plate outside the axis of the rubber bearing, in which in each case one on the sealing head or sealing contour carrier attached zylinderischer centering pin engages. The latter constructive measures together lead to a play and torsion-free down the rubber bearing, which have a high Siegei Struktur result.
  • the heatable sealing contour is constructed from an independent contour plate and an independent heating plate.
  • both plates are releasably connected to each other and releasably secured to the sealing contour carrier.
  • This training leads to an essential improvement in maintenance and repair, since in case of failure of the heater or the thermostat only the hot plate must be replaced.
  • the complete unit consisting of sealing heads and support plate need not be removed, but only specifically the defective heating plate. Since the contour plate and the heating plate are detachably connected to each other, the removal and installation of the two elements requires little time and is in particular feasible without removing further elements of the device.
  • the heating plate is designed as a flat heater, preferably as a ceramic flat heater, or heating plate with heating cartridge.
  • a material for the heating plate and / or also for the flat heaters copper and / or aluminum are particularly preferred because of their thermal conductivity. Both versions have a very long service life, so that an exchange of this element is required only in relatively large periods. Long downtimes of the packaging system and thus high production losses due to failed heating elements are practically excluded from the outset in the present device.
  • the contour plate made of hardened material or a material resistant to aggressive substances, preferably stainless steel, is formed.
  • At least one thermally insulating layer is provided according to a feature of the invention between the heating plate and the joint element.
  • a preferred embodiment of the present invention also provides a deviating from the prior art solution.
  • said guide pins are fixed rigidly in a base plate fixed to the support plate and the linear displacement of the sealing head relative to the base plate is effected by a displacement of the sealing head relative to the guide pins.
  • the sealing head accordingly has holes in which ball bushings are provided, which in turn run on the guide pins.
  • the laying of the support point of the guide pins in comparison to the prior art result in a shorter lever arm, so that the leading to tilt the bolt moments that give rise to resistance to movement, are largely reduced.
  • the ball bushings cause a smooth running of the Movement of the bolts that allow to realize a short stroke.
  • the equipment of the sealing head with ball bushings also brings a substantial elimination of the friction between the guide pin and sealing head with a Linerarverschiebung the sealing head with it, and thereby also avoids undefined effects on the contact pressure of the sealing contour.
  • the proposed design ensures easy interchangeability of the seal series and the sealed package. Together with the above-mentioned measures, which ensure a simple replacement of the essential individual elements, thereby a high maintenance, maintenance and user-friendliness is achieved.
  • the proposed design also allows easy measurement and adjustment of the required temperatures and the force to be exerted by the sealing head on the pack to be sealed. For this purpose, a measuring device with sensors for each seal contour plate placed on the seal package, the actual values of the temperature and the contact pressure determined and then the heating and the lever adjustment Individually adjusted with each seal head to the respective setpoints.
  • FIG. 1 the basic structure of a structural unit is to be taken, which is led under the above-mentioned designation sealing position. It represents a complete unit for producing a sealing contour and comprises the following elements: contour plate 1, heating plate 2, insulating plate 3, hinge element 4, sealing head 5, lever element 6, spring bearing plate 7, guide pin 8, spring elements 9, base plate 10, support plate 11.
  • the guide pins 8 are rigidly fixed in the base plate 10, wherein the base plate in turn is detachably mounted on the support plate 11.
  • the spring elements 9 are formed as helical springs which comprise the bolts 8 and are arranged in the space between the base plate 10 and the spring bearing plate 7.
  • the spring bearing plate 7 bores 12, which allow a relative to the guide pin 8 relative displacement of the bearing plate 7.
  • a displacement of the bearing plate 7 in the direction of the support plate 11 leads to a shortening of the springs 9 and consequently to an increase in the spring preload.
  • the displacement of the bearing plate 7 can be caused by a one-armed lever element 6, which is articulated at the point 13 on the sealing head 5.
  • the lever is designed so that its first lever arm with his free end 14 presses against the spring bearing plate 7 and the second lever arm with its free end 15 against an adjusting screw whose position is indicated in the present illustration by the dash-dotted line 16.
  • the position is chosen so that the adjusting screw from the end face 17 of the sealing head 5 is operable.
  • ball bushings are shown, which are arranged in bores corresponding diameter of the sealing head 5. They allow after placing the sealing head on the cover sheet 19 of the Bliesterpacks 20 a linear displacement of the sealing head 5 on the guide pin 8 in the direction of the support plate 11 to. The force generated by the bias of the spring elements 9 in this case transfers to the contour plate 1 and ensures a uniform contact pressure to the cover sheet 19th
  • the present device is therefore equipped with a hinge element 4, which consists of two metal plates 20, 20 'and a rubber layer 21 enclosed between the plates. This element allows tilting of the contour plate 1 about the directions perpendicular to the axis 22 of the device, but does not permit rotation about said axis.
  • the rubber bearing 4 thus ensures that the contour plate 1 is always aligned parallel to the surface of the cover sheet 19 and thereby undergoes no rotation about the axis 22.
  • the rubber bearing 4 receives the sealing contour carrier 23 with the actual necessary for sealing elements. These include the contour plate 1 and the heating plate 2. Both components are designed as separate elements and releasably connected to each other. In order to prevent the heat flow from these two elements in the direction of rubber bearing 4, a thermally insulating plate 3 is provided between the heating plate 2 and the joint element 4.
  • proposed device ensures a simple and fast adjustment of the contact pressure, a high quality seal, optimal accessibility to all components and low susceptibility to interference.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Package Closures (AREA)
  • Closing Of Containers (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Table Devices Or Equipment (AREA)

Claims (16)

  1. Dispositif destiné à sceller des récipients en forme de coupe ou de gobelet, comme par exemple des blister packs ou des gobelets pour conserver des produits laitiers, comme le yoghourt, le quark ou la crème à café, avec
    • une tête de scellement (5),
    ■ présentant un support du contour de scellement (23) et un contour de scellement chauffable (1, 2),
    • une plaque support (11) avec
    ■ au moins un boulon de guidage (8),
    ■ permettant un déplacement linéaire de la tête de scellement (5) par rapport à la plaque support (11),
    • au moins un élément de ressort (9),
    ■ alimentant la tête de soudage (5) en une force repoussant de la plaque support (11),
    • une plaque-palier à ressort (7),
    ■ disposée entre la tête de scellement (5) et la plaque support (11),
    ■ pouvant être déplacée linéairement dans la même direction que la tête de scellement (5),
    ■ et reposant sur l'extrémité de l'élément de ressort (9) tourné vers la tête de scellement (5)
    • et d'un élément d'articulation (4) affecté à la tête de scellement (5)
    ■ permettant un pivotement du support du contour de scellement (23) autour des axes orientés à la verticale par rapport aux boulons de guidage cités.
    caractérisé par le fait
    • qu'au moins un boulon de guidage (8) est fixé médiatement ou immédiatement sur la plaque support (11), et
    • que l'élément d'articulation prend la forme d'un palier en caoutchouc (4)
    ■ avec deux plateaux métalliques (20, 20') et une couche intermédiaire en caoutchouc (21),
    ■ sachant que les plateaux (20, 20') sont vulcanisés ou collés.
  2. Dispositif selon la revendication 1, caractérisé par le fait que
    • chacun des plateaux métalliques (20 ou 20') possède un boulon concentrique par rapport à l'axe du palier en caoutchouc du côté repoussant de la couche en caoutchouc (21),
    ■ présentant une rainure avec flanc en queue d'aronde,
    ■ venant s'engrener dans un trou de même diamètre dans la tête de scellement (5) ou dans le support du contour de scellement (23)
    ■ et pouvant être fixé contre le flanc susnommé au moyen d'au moins une vis à chaque fois dans la tête de scellement (5) et dans le support du contour de scellement (23).
  3. Dispositif selon la revendication 1 ou 2, caractérisé par le fait
    • que chaque plateau métallique (20 ou 20') présente un trou situé à l'extérieur du palier en caoutchouc,
    • dans lequel vient s'engrener à chaque fois une tige de centrage fixé sur la tête de scellement (5) et sur le support du contour de scellement (23).
  4. Dispositif selon une des revendications précédentes, caractérisé par le fait
    • qu'un élément de réglage (6) est prévu entre la plaque-palier à ressort (7) et la tête de scellement (5)
    • au moyen duquel on peut modifier la distance de la plaque-palier à ressort (7) par rapport à la plaque support (11).
  5. Dispositif selon la revendication 4, caractérisé par le fait
    • que l'élément de réglage cité comprend un levier à un bras (6),
    • qui est articulé sur la tête de scellement (5) ou sur la plaque-palier à ressort (7),
    • dont l'un des bras de levier presse, avec son extrémité libre (14) contre la plaque-palier à ressort (7) ou la tête de scellement (5)
    • l'autre bras de levier pressant avec son extrémité libre (15) contre une vis de réglage (16),
    • sachant que la vis de réglage (16) peut être manipulée de préférence depuis le côté frontal (17) opposé à la plaque support (11).
  6. Dispositif selon la revendication 5, caractérisé par le fait
    • que le point d'articulation (13) du levier (6) est disposé dans une zone périphérique de la tête de scellement (5)
    • et que la vis de réglage (16) est disposée dans la zone opposée de la tête de scellement (5)
    • et que l'extrémité libre (14) de l'un des bras de levier se trouve dans la zone de l'axe de la tête de scellement (5).
  7. Dispositif selon la revendication 5 ou 6, caractérisé par le fait
    • que la vis de réglage (16) comprend une tige cylindrique pouvant être déplacée en direction de son axe et une tige filetée à tête à six pans creux,
    ■ sachant que la tige filetée est disposée entre le levier cité et la tige filetée citée
    ■ et que la tige filetée peut être fixée dans la zone de sa tête à l'aide d'un contre-écrou.
  8. Dispositif selon une des revendications précédentes, caractérisé par le fait
    • que le contour de scellement chauffable est constitué d'une plaque de contour indépendante (1) et d'une plaque de chauffage indépendante (2),
    • et que les deux plaques (1, 2)
    ■ sont reliées de façon à pouvoir être détachées
    ■ et sont fixées au support du contour de scellement de façon à pouvoir être détachées.
  9. Dispositif selon la revendication 8, caractérisé par le fait
    • la plaque de chauffage (2) prend la forme
    • d'un appareil de chauffage plat
    • ou d'une plaque de chauffage avec cartouche de chauffage.
  10. Dispositif selon une des revendications 8 ou 9, caractérisé par le fait
    • qu'au moins une couche isolante (3) est prévue entre la plaque de chauffage (2) et l'élément d'articulation.
  11. Dispositif selon une des revendications 8 à 10, caractérisé par le fait
    • que la plaque de contour (1) est formée de métal trempé.
  12. Dispositif selon une des revendications 8 à 11, caractérisé par le fait
    • que la plaque de contour (1) est formée d'un matériau résistant aux substances agressives,
    • de préférence l'inox.
  13. Dispositif selon une des revendications 1 à 12, caractérisé par le fait
    • que le / les boulons de guidage (8) est / sont fixés de façon rigide à une plaque de base (10)
    • et que le déplacement linéaire de la tête de scellement s'effectue en déplaçant la tête de scellement (5) par rapport au / aux boulons de guidage (8)
    • et que la tête de scellement (5) est équipée de douilles sphériques (18)
    • qui se déplacent sur le boulon de guidage (8).
  14. Dispositif selon la revendication 13, caractérisé par le fait
    • que la tête de scellement (5) est montée avec
    • une plaque de contour (1),
    • une plaque de chauffage (2),
    • une ou plusieurs plaques d'isolation (3),
    • un élément articulé (4), et
    • une plaque-palier à ressort (7),
    • deux boulons de guidage (8),
    • deux éléments de ressort (10)
    en formant un groupe indépendant.
  15. Dispositif selon la revendication 14, caractérisé par le fait
    • que plusieurs des groupes cités, par exemple quatre, sont montés sur la même plaque de base (10),
    • et que plusieurs plaques de base (10), par exemple cinq, sont en règle générale montées sur la plaque support de façon à pouvoir être séparées.
  16. Dispositif selon la revendication 14 ou 15, caractérisé par le fait que les plaques de base ne peuvent être montées sur la plaque support (11) que dans un ordre donné clair.
EP03752703A 2002-05-17 2003-05-16 Dispositif permettant de sceller des recipients en forme de coupes ou de pots Expired - Lifetime EP1507707B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10222619A DE10222619A1 (de) 2002-05-17 2002-05-17 Vorrichtung zur Versiegelung von schalen- oder becherförmigen Behältnissen
DE10222619 2002-05-17
PCT/DE2003/001589 WO2003097460A1 (fr) 2002-05-17 2003-05-16 Dispositif permettant de sceller des recipients en forme de coupes ou de pots

Publications (2)

Publication Number Publication Date
EP1507707A1 EP1507707A1 (fr) 2005-02-23
EP1507707B1 true EP1507707B1 (fr) 2008-07-02

Family

ID=29285639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03752703A Expired - Lifetime EP1507707B1 (fr) 2002-05-17 2003-05-16 Dispositif permettant de sceller des recipients en forme de coupes ou de pots

Country Status (8)

Country Link
US (1) US7735298B2 (fr)
EP (1) EP1507707B1 (fr)
AT (1) ATE399713T1 (fr)
AU (1) AU2003232626A1 (fr)
CA (1) CA2500504C (fr)
DE (2) DE10222619A1 (fr)
ES (1) ES2310668T3 (fr)
WO (1) WO2003097460A1 (fr)

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GB201016930D0 (en) * 2010-10-07 2010-11-24 Ishida Europ Ltd Lifting apparatus
US10343797B2 (en) 2015-03-12 2019-07-09 Owens-Brockway Glass Container Inc. Sealing foil liners to containers
CN106043829B (zh) * 2016-07-27 2017-09-26 东莞恩茁智能科技有限公司 热封合装置及使用该热封合装置的封装机
HUE062141T2 (hu) 2016-12-08 2023-09-28 Alcon Inc Berendezés szemlencse-csomagolás légmentes lezárására
JPWO2021187293A1 (fr) * 2020-03-16 2021-09-23

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DE19629356A1 (de) * 1996-07-20 1998-01-22 Willi Stenzel Vorrichtung und Verfahren zum Heißversiegeln von Behälteröffnungen mittels Folienzuschnitten
EP0855264A1 (fr) * 1997-01-27 1998-07-29 Novartis AG Procédé et appareil pour le soudage d'une feuille de couverture sur la base d'un récipient d'emballage ainsi qu'un procédé et appareil pour l'emballage de lentilles de contact
US6637491B2 (en) * 2001-09-07 2003-10-28 Creative Foods, Llc Sealing head for lidding machine

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DE50310072D1 (de) 2008-08-14
WO2003097460A1 (fr) 2003-11-27
AU2003232626A1 (en) 2003-12-02
ATE399713T1 (de) 2008-07-15
US7735298B2 (en) 2010-06-15
DE10222619A1 (de) 2003-11-27
EP1507707A1 (fr) 2005-02-23
ES2310668T3 (es) 2009-01-16
CA2500504C (fr) 2010-09-07
US20050252171A1 (en) 2005-11-17
CA2500504A1 (fr) 2003-11-27

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