EP1950162B1 - Système d'aspiration pour bobinoir - Google Patents

Système d'aspiration pour bobinoir Download PDF

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Publication number
EP1950162B1
EP1950162B1 EP20080100677 EP08100677A EP1950162B1 EP 1950162 B1 EP1950162 B1 EP 1950162B1 EP 20080100677 EP20080100677 EP 20080100677 EP 08100677 A EP08100677 A EP 08100677A EP 1950162 B1 EP1950162 B1 EP 1950162B1
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EP
European Patent Office
Prior art keywords
suction
spooling
individual
spooler
service
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.)
Active
Application number
EP20080100677
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German (de)
English (en)
Other versions
EP1950162A2 (fr
EP1950162A3 (fr
Inventor
Roberto Badiali
Giorgio Colomberotto
Mauro Ceolin
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.)
Savio Macchine Tessili SpA
Original Assignee
Savio Macchine Tessili SpA
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Publication of EP1950162A2 publication Critical patent/EP1950162A2/fr
Publication of EP1950162A3 publication Critical patent/EP1950162A3/fr
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Publication of EP1950162B1 publication Critical patent/EP1950162B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/70—Other constructional features of yarn-winding machines
    • B65H54/702—Arrangements for confining or removing dust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/70—Other constructional features of yarn-winding machines
    • B65H54/707—Suction generating system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention refers to a suction device serving spooling stations of a spooler.
  • the technique of producing yarns in a first spinning stage - typically ring-spinning that produces yarns in a spool - followed by a second spooling stage in which the yarn is unwound from its spool, purified of its defects and rewound in a reel, is widely used.
  • the spooling process is carried out in spoolers arranged downstream of the spinners.
  • spoolers consist of a plurality of spooling units aligned along the front of the machine and equipped with common control and service apparatuses.
  • the spooling unit is illustrated in its essential components in figure 1 , omitting those not directly involved in the technical solution that constitutes the present invention.
  • the feed spool 1 is unwound by picking up its thread 2.
  • the thread 2 passes from the unwinding group that comprises thread guide members 3, the thread sensor or detector 4 and the thread tightener 5, generally consisting of a pair of interfacing spool carriers that press the unwinding yarn between them with regulated and controlled pressure.
  • the end joining device known as thread piecing machine, to which the ends of interrupted thread needing to be pieced are taken by suction mouths 9 and 10, when the thread is interrupted by breaking or by intervention of the line clearer 11 that is located immediately downstream of the thread piecing machine.
  • the spooled thread is collected in the reel 12, which is made to rotate by the roller 13, on which it rests supported with the reel-carrying arm 14, at a predetermined and substantially constant speed.
  • the rotating reel 12 attracts the thread 2, unwinding it at high speed from the spool 1 kept still on a positioning pin 15.
  • the suction mouth 9 on the side of the spool can make the angular movement ⁇ that takes the suction nozzle of the mouth itself firstly to capture the end of the thread 2 from the unwinding group 3, to carry out, by lifting itself, the rotation ⁇ , taking the end to the thread piecing machine 6.
  • the suction mouth 10 on the side of the mouth itself, before capturing the end of the thread 2 from the reel, on the other hand, is able to make the angular movement ⁇ that takes the suction nozzle of the mouth itself firstly to capture the end of the thread 2 from the reel 12, lowering with the rotation ⁇ , until the end of the reel side is taken to the thread piecing machine 6.
  • Such a thread piecing machine after having received and cut the two ends to size - eliminating the off-cuts and the pieces of thread, the so-called "lint", sucking them up at the mouths 9 and 10 - and having correctly aligned such prepared ends, then proceeds to piece them together.
  • the thread piecing machine 6, with piecing complete releases the thread and goes back into its spooling configuration from spool 1 to reel 12.
  • the spooling process substantially consists of unwinding the feed yarn and of purifying it of its defective portions in terms of mechanical consistency or size.
  • the yarn 2 In its passage from the spool 1 to the reel 12, the yarn 2 is controlled from the line clearer 11 that detects its size defects, both the in the transversal direction and the in length.
  • the line clearer 11 commands the cutting of the thread every time that the detected size of the thread 2 does not fall within the acceptable size range of the thread according to its calibration.
  • the yarn cutting member can be incorporated into the line clearer 11 itself or, like in figure 1 , it can be separate as scissors 7, shown arranged between the thread sensor 4 and the thread tightener 5.
  • the sensor 4 of the thread 2 indicates to the control unit 16 of the spooling station that there is no thread.
  • the control unit 16 includes the command and control programme for the reattachment procedure, with the connections indicated as an example with a broken line.
  • FIG. 2A illustrates the scheme of the structure of the individual spooling unit 30, the parallelepiped-shaped bulk of which is shown.
  • FIG. 2A illustrates the scheme of the structure of the individual spooling unit 30, the parallelepiped-shaped bulk of which is shown.
  • dust removal which requires a low head suction, of the order of 5-10 mbar and with flow rates of the order of 50 mc/h.
  • This service involves an energy consumption of the order of 50-70 Wh per unit.
  • This service can be ensured by a central unit that serves the entire front of the machine but, in general, it is carried out - as shown in figure 2B that shows a front view of a piece of many spooling units 30 - by fractioning such a service between a plurality of suction devices 31, in general 1 for every 8-12 spooling units, and as an example connected in figure 2 to eight of such spooling units 30 with connections 32 from the bottom to a short manifold 33, to ensure the uniformity between the eight units served, avoiding long pipes that would cause significantly less suction by the spooling units farthest away.
  • the suction services required to start the new spool 1 and for each piecing operation of the ends of the thread 2 due to the interruption of the thread by the line clearer, and that requires that they be sucked up with the mouths 9 and 10 as well as sucked up with the end delivery 18, are discontinuous and limited to the times of their intervention, lasting of the order of 1-4 seconds at a time.
  • the frequency of the piecing of the thread during the course of the unwinding of a spool can vary within very wide limits, according to the quality of the thread and the calibration given to the line clearer 11.
  • Such discontinuous services with variable frequency require rather high suction heads, of the order of 60-90 mbar, to make the end capturing cycles and the waste discharge efficient and safe.
  • this discontinuous service is centralised - as shown in figure 2C - into a single large suction device 35 with powers of the order of 7-20 kW according to the number of spooling units 30 that make up the spooler and connected with the pipe 36, providing the heads mentioned above and flow rates of the order of 4000-6000 mc/h: the flow rate and head of the suction device can be increased or decreased by modifying the number of revolutions given to the suction device itself, with the relative increase or decrease in power to be supplied to the actuation motor.
  • Each spooling unit is connected to the general pipe of the high head suction device with the interposition of valves, for example electrovalves, which are opened just for the duration of the required suction when it makes its interventions on the ends of the thread, thus taking the suction that is needed for the time needed.
  • valves for example electrovalves
  • the suction device for serving the end delivery mouth 18 is connected to the pipe 36 of the high depression suction device with the piping 37 intercepted with the valve 38, whereas for the suction device for the mouths 9, 10 for serving the thread piecing machine 6, the connection is made with the piping 40 intercepted with the gate valve 41.
  • Such valves 38 and 41 are therefore opened just when the spooling unit needs high depression suction and are kept closed at all other times.
  • the control of such suction, with the opening and closing of the electrovalves 38, 41 is always performed by the control unit 16 of the spooling unit.
  • a filter 43 for the dust that comes from the low depression dust removal and a filter 44 for the so-called "lint", produced in the intervention cycles of the line clearer and that are taken away by the high depression suction are respectively arranged.
  • These filters are arranged in low-speed areas of the pipes, known as calm areas, in which speeds are kept to 1-2.5 m/sec; they are periodically cleaned of the captured material so as to limit the load loss in their suction channel.
  • the present invention is aimed at a new suction scheme for serving the spooler that overcomes the drawbacks described up to now.
  • the present invention in its most general embodiment of a suction device serving the spooling units that make up the spooler is defined in the first claim. Its variants or preferred embodiments are defined in the dependent claims from 2 to 11.
  • Figure 1 illustrates the side view of the spooling unit and highlights the technical problem of the suction service to be supplied to it.
  • Figures 2A-C show the scheme of a suction service illustrating the state of the art.
  • Figure 3 illustrates the scheme of the suction device according to the present invention for serving a spooler.
  • Figure 3A shows the two centralised suction devices for serving the spooler in an isometric view and figure 3B shows them in a front view.
  • figures 3C, 3D show respective isometric and front views of the scheme of the suction system of the individual spooling unit 30, the parallelepiped-shaped bulk of which is shown.
  • a central suction unit 50 is foreseen that serves all of the spooling units of the front of the machine with a large pipe 51 that runs for the entire length of the front of the spooler.
  • a pipe 51 acts as a manifold of all of the mouths of the dust removal service that connect to it with pipe fittings 52.
  • the power of such a low head suction device is 2-3 kW and provides a head of 10-14 mbar, with a flow rate of 3000-5000 mc/h, depending upon the number of units of the spooler.
  • a filter 54 is arranged before the suction unit 50 for the fibres and dust that come from the low depression dust removal.
  • the suction service for the end delivery mouth 18 is exerted continuously by connecting said mouth to the low depression suction device and sucking continuously, instead of just during interventions.
  • FIGS 3C , D illustrate the scheme of the structure of the individual spooling unit 30, the parallelepiped-shaped bulk of which and the components of the suction service are shown.
  • the discontinuous suction services required for the mouths 9 and 10, on the other hand, are performed by a series of small suction devices 60 - one for each spooling unit - arranged to serve the individual spooling unit and always commanded by its control unit 16, which are only enabled for the time of the intervention cycle that is carried out by the unit itself.
  • the individual suction devices 60 have an indicative unitary power of the order of 1 kW, with a flow rate of 150 mc/h and a head of the order of 100 mbar. They are each equipped with a filter 61 for the "lint", taken away by the high depression suction by the suction device 60, which holds them upstream of the suction device itself. The individual suction device 60 may discharge its lot through the delivery pipe 63 directly to the atmosphere as the great part of the fibrous material suctioned remains in the filter 61.
  • the delivery pipe 63 of the individual suction devices 60 opens out into the respective pipe fittings 52 that connect to the pipe 51, collector of the waste from the dust removal service, which thus also discharges the flows of the individual suction devices 60.
  • the individual suction devices 60 serve their spooling unit 30 and are connected to its mouths 9, 10 with the piping 67 intercepted with the valve 68.
  • the continuous service of the end delivery mouth 18, on the other hand, is connected with the piping 64 to the pipe fitting 52 with the low depression suction.
  • the valve 68 is therefore only opened when the single suction device 60 is placed in operation and remains closed during normal spooling.
  • a suction device 80 with a power of the order of 1-1.5 kW serves the spooling units that make up the spooler connected with the pipe 81, providing heads of the order of 100 mbar and flow rates of the order of 150 mc/h.
  • Each spooling unit is connected to the general pipe of the high head suction 81 upstream of the respective filter 61, with a fitting 70 and with the interposition of valves 71, which are opened just for the cleaning of the filters 61 with which the individual units are equipped from the lint and from the dust that has accumulated in them.
  • the suction time needed to clean the filters 61 with which the individual suction devices are equipped is of the order of 1-3 seconds.
  • Such cleaning is carried out on the individual suction devices 60 during the time when they are not operating, i.e. outside of the intervention cycles. It can be carried out at the end of the operation of the individual suction device 60, so as to take away the dirt deposited in the filter during the intervention that has just ended each time.
  • a pneumatically-controlled guillotine gate can be used, activated to open by the rotation of the same motor of the individual suction device, at the end of its actuation of the suction device.
  • cleaning can be carried out by the control unit of the spooler for one or more, and in any case not many, spooling units 30 at a time, preferably according to a programmed cycle independent of the interventions of their suction device 60, thus distributing the cleaning service in sequence between the spooling units 30.
  • an air intake valve 74 On each individual suction device 60 with which the spooling units 30 are equipped an air intake valve 74 is mounted. It is normally kept closed both during the interventions of the line clearer and during normal spooling and is opened during cleaning of its filter 61, to allow the flow of air necessary to remove the lint from said filter through the connection to the high depression duct 81 opening the valve 71.
  • the opening and closing command of the air intake valve 74 is thus associated with the same opening and closing command of the valve 71.
  • a filter 82 is arranged for the lint produced in the intervention cycles of the line clearers of the individual units 30, periodically taken away by the high depression centralised suction.
  • the filters 54, 82 are arranged in calm areas and are periodically cleaned of the captured material so as to limit the load loss in the intake manifold.
  • the control of the suction device 60 with which each individual spooling unit is equipped is actuated independently for each spooling unit 30; such control can thus be varied by its control unit 16 according to the state and the needs of the individual unit 30, modulating its operating suction parameters (preset or measured instantaneously): for example the frequency of red call lights for the operator due to the ends not being captured, defective spools, missing joins, and so on.
  • the suction system according to the present invention offers substantial advantages.
  • suction values of the individual spooling unit can easily be modulated according to the contingent need of the individual unit, or else with the required flexibility to simultaneously work many batches of yarn on the same machine.
  • the technical solution according to the present invention and illustrated with reference to figure 3 - in addition to the advantages of efficiency and quality outlined above - also allows a significant energy saving for the suction, which is of the order of 20-40% less than the scheme of figure 2 , depending upon the number of spooling units that make up the machine.
  • the saving allowed by the technical solution according to the present invention is of the order of 15-30% less compared to the scheme of figure 2 .

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Cleaning In General (AREA)
  • Soil Working Implements (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)

Claims (11)

  1. Bobinoir constitué d'une pluralité d'unités de bobinage (30) alignées et servies par un système d'aspiration qui fournit à la fois un service d'aspiration continue par dépression faible pour des bouches (20) placées au niveau de la bobine d'alimentation (1) pour le service de dépoussiérage, et un service d'aspiration discontinue par dépression forte pour les bouches (9, 10) pour des interventions permettant l'interruption et le rattachage du fil (2) et pour démarrer une nouvelle bobine (1), caractérisé en ce que le service d'aspiration discontinue par dépression forte est fourni par une série de petits dispositifs d'aspiration individuels (60), un pour chaque unité de bobinage, agencé pour servir son unité de bobinage individuelle (30) et commandé par son unité de commande (16), lesdits dispositifs d'aspiration individuels (60) n'étant mis en service que pour la durée du cycle d'intervention qui est exécuté par l'unité elle-même, et en ce que les dispositifs d'aspiration individuels (60) sont munis chacun d'un filtre (61) pour le déchet de filé, qui le maintient en amont du dispositif d'aspiration lui-même, et en ce qu'un dispositif d'aspiration centralisé à tête haute (80) sert les unités de bobinage qui constituent le bobinoir avec un tube (81), pour nettoyer les filtres (61) dont sont équipées les unités individuelles, quand leurs dispositifs d'aspiration individuels (60) ne sont pas en fonctionnement.
  2. Bobinoir selon la revendication 1, caractérisé en ce que la vidange du lot de dispositifs d'aspiration individuels (60) est effectuée dans le collecteur (51) du rejet du service de dépoussiérage.
  3. Bobinoir selon la revendication 1, caractérisé en ce que l'aspiration continue par dépression faible est fournie avec une unité d'aspiration centrale (50) qui sert toutes les unités de bobinage avec un tube (51) qui agit comme un collecteur à la fois des bouches (20) du service de dépoussiérage et des distributions des dispositifs d'aspiration individuels à dépression forte (60).
  4. Bobinoir selon la revendication 3, caractérisé en ce que l'aspiration continue par dépression faible fournie par l'unité d'aspiration centrale (50) qui sert toutes les unités de bobinage (30) avec le tube (51) et les raccords (52) sert aussi des bouches de distribution d'extrémité (18) dont lesdites unités de bobinage sont équipées pour capturer son extrémité inférieure, c'est-à-dire sur le côté de la bobine (1), à chaque fois que le fil est interrompu.
  5. Bobinoir selon la revendication 1, caractérisé en ce que le dispositif d'aspiration centralisé à tête haute (80) est connecté aux unités de bobinage (30) à travers des vannes (71), qui ne sont ouvertes que pour le nettoyage des filtres (61) dont sont équipés les dispositifs d'aspiration individuels (60), tandis que les vannes (65) et (68) servant à connecter les bouches (9, 10, 18) de l'unité de bobinage sont maintenues fermées.
  6. Bobinoir selon la revendication 1, caractérisé en ce que les dispositifs d'aspiration individuels à dépression forte (60) fournissent des débits de suivi de 150 mc/h avec une tête de l'ordre de 100 mbar.
  7. Bobinoir selon la revendication 3, caractérisé en ce que le dispositif d'aspiration centralisé à dépression faible (50) fournit une tête de 10 à 14 mbar, avec des débits de 3000 à 5000 mc/h.
  8. Bobinoir selon la revendication 1, caractérisé en ce que les vannes (71) permettant la connexion au dispositif d'aspiration centralisé à tête haute (80) pour nettoyer les filtres (61) s'ouvrent suite à la rotation du même moteur du dispositif d'aspiration individuel (60), à la fin de son actionnement pour ledit dispositif d'aspiration.
  9. Bobinoir selon la revendication 5, caractérisé en ce que les vannes (71) permettant la connexion au dispositif d'aspiration centralisé à tête haute (80) pour nettoyer les filtres (61) sont ouvertes suite à l'instruction de l'unité de commande du bobinoir pour une ou plusieurs unités de bobinage (30) à la fois, selon un cycle programmé indépendant des interventions de leur dispositif d'aspiration (60), répartissant le service de nettoyage en séquence entre les unités de bobinage (30).
  10. Bobinoir selon la revendication 5, caractérisé en ce que le dispositif d'aspiration individuel (60) est pourvu d'une entrée d'air et en ce que l'instruction d'ouverture et de fermeture de la vanne d'entrée d'air (74) est ainsi associée à la même instruction d'ouverture et de fermeture de la vanne (71) pour nettoyer les filtres (61).
  11. Bobinoir selon la revendication 1, caractérisé en ce que les dispositifs d'aspiration individuels (60) sont commandés chacun indépendamment pour chaque unité de bobinage (30) par son unité de commande (16) selon l'état et les besoins de l'unité de bobinage individuelle (30).
EP20080100677 2007-01-29 2008-01-21 Système d'aspiration pour bobinoir Active EP1950162B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20070133 ITMI20070133A1 (it) 2007-01-29 2007-01-29 Sistema di aspirazione per roccatrici

Publications (3)

Publication Number Publication Date
EP1950162A2 EP1950162A2 (fr) 2008-07-30
EP1950162A3 EP1950162A3 (fr) 2009-03-25
EP1950162B1 true EP1950162B1 (fr) 2012-02-29

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EP20080100677 Active EP1950162B1 (fr) 2007-01-29 2008-01-21 Système d'aspiration pour bobinoir

Country Status (3)

Country Link
EP (1) EP1950162B1 (fr)
CN (1) CN101235565B (fr)
IT (1) ITMI20070133A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2799380A1 (fr) 2013-04-30 2014-11-05 Savio Macchine Tessili S.p.A. Bobinoir

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Publication number Priority date Publication date Assignee Title
JP4403519B2 (ja) * 2007-08-21 2010-01-27 村田機械株式会社 風綿回収装置
DE102008057321A1 (de) * 2008-11-14 2010-05-20 Oerlikon Textile Gmbh & Co. Kg Arbeitsstelle einer Spulmaschine mit einem saugluftbeaufschlagten Greiferrohr
IT1396438B1 (it) * 2009-11-16 2012-11-23 Savio Macchine Tessili Spa Sistema di aspirazione individuale per unita' di roccatura.
IT1403276B1 (it) 2010-12-20 2013-10-17 Savio Macchine Tessili Spa Sistema di pulizia individuale per unita' di roccatura
IT1403662B1 (it) * 2011-01-31 2013-10-31 Savio Macchine Tessili Spa Sistema di raccolta degli sfridi di roccatura
ITMI20110585A1 (it) * 2011-04-08 2012-10-09 Savio Macchine Tessili Spa Sistema per la raccolta e il ricupero degli sfridi di roccatura
ITPD20130135A1 (it) * 2013-05-16 2014-11-17 Savio Macchine Tessili Spa Metodo di roccatura e roccatrice
DE102016101653B4 (de) * 2016-01-29 2023-01-12 Rieter Ingolstadt Gmbh Spinnmaschine mit Absaugeinrichtung
JP2017206327A (ja) * 2016-05-16 2017-11-24 村田機械株式会社 繊維機械
CN107964702A (zh) * 2017-11-30 2018-04-27 浙江博泰纺织有限公司 一种成卷机
JP2019123587A (ja) * 2018-01-16 2019-07-25 村田機械株式会社 自動ワインダにおける静圧制御方法及び自動ワインダ
CN115626527B (zh) * 2022-12-22 2023-03-17 南通普稀斯特种纤维有限公司 一种防打结纱线卷绕装置

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FR1188285A (fr) * 1956-12-13 1959-09-21 Bobinoir
DE3225379A1 (de) * 1982-07-07 1984-01-12 W. Schlafhorst & Co, 4050 Mönchengladbach Verfahren und vorrichtung zum aufsuchen und festhalten eines fadenendes
JPS6413374A (en) * 1987-07-08 1989-01-18 Murata Machinery Ltd Flow rate control of centralized blower system
DE4341732A1 (de) * 1993-12-08 1995-06-14 Schlafhorst & Co W Unterdruckanlagen von Textilmaschinen im Verbund
IT1269702B (it) * 1994-01-11 1997-04-15 Savio Macchine Tessili Srl Metodo ed apparecchiatura per aspirare e per asportare automaticamente la lanuggine e il pulviscolo in una stazione di roccatura
JP2973933B2 (ja) * 1996-07-08 1999-11-08 村田機械株式会社 自動ワインダのクリーニング装置
DE19854817A1 (de) * 1998-11-27 2000-05-31 Schlafhorst & Co W Einzelspindler zum Umspulen von Kopsen zu Kreuzspulen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2799380A1 (fr) 2013-04-30 2014-11-05 Savio Macchine Tessili S.p.A. Bobinoir

Also Published As

Publication number Publication date
CN101235565A (zh) 2008-08-06
EP1950162A2 (fr) 2008-07-30
ITMI20070133A1 (it) 2008-07-30
CN101235565B (zh) 2011-08-24
EP1950162A3 (fr) 2009-03-25

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