EP3187631B1 - Procédé pour éliminer une trame mal insérée par un médiator hydraulique dans la foule d'un métier à tisser et dispositif hydraulique permettant de mettre en uvre le procédé - Google Patents

Procédé pour éliminer une trame mal insérée par un médiator hydraulique dans la foule d'un métier à tisser et dispositif hydraulique permettant de mettre en uvre le procédé Download PDF

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Publication number
EP3187631B1
EP3187631B1 EP16206650.0A EP16206650A EP3187631B1 EP 3187631 B1 EP3187631 B1 EP 3187631B1 EP 16206650 A EP16206650 A EP 16206650A EP 3187631 B1 EP3187631 B1 EP 3187631B1
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EP
European Patent Office
Prior art keywords
weft
machine
shed
control system
hydraulic
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.)
Not-in-force
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EP16206650.0A
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German (de)
English (en)
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EP3187631A3 (fr
EP3187631A2 (fr
Inventor
Jiri Mlynar
Martin Beran
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Vuts AS
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Vuts AS
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Publication of EP3187631A3 publication Critical patent/EP3187631A3/fr
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Publication of EP3187631B1 publication Critical patent/EP3187631B1/fr
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
    • D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping
    • D03D51/085—Extraction of defective weft
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/32—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by liquid jet

Definitions

  • the invention relates to a method for removing a weft incorrectly inserted by a hydraulic pick into the shed of a weaving machine, in which a control system for detecting the incorrectly inserted weft performs the stopping of the machine, removes the incorrectly inserted weft and restarts the machine into production mode, whereby during the same revolution of the machine when the weft was improperly inserted (picked), the signal to stop the machine is generated by the control system of the machine, by which means interruption of the defectively inserted weft at the entrance of the shed is prevented.
  • the operation of the machine is reversed to a state with an open shed position in which the weft was not inserted properly, whereupon a new weft is inserted as static weft insertion without the motion of the opened branches of the warp and without the motion of the means for transferring the new weft to the fell of the fabric being formed, by the new weft insertion the previously incorrectly inserted weft is removed from the opened shed, whereupon on the side of the shed remote from the picking nozzle it is determined whether the weft thread has been removed successfully and the machine is either restarted and switched into production mode or it is stopped and error signalling is initiated.
  • the invention also relates to a device for removing a weft incorrectly inserted by a hydraulic pick into the shed of a hydraulic weaving machine, which comprises a measuring device of the length of the weft thread, aligned with a hydraulic picking nozzle, which is situated on one lateral side of the shed and is directed to the other side of the shed in the direction of the fabric being formed, whereby a weft stop is mounted on the machine frame and in the area between the picking nozzle and the proximal edge of the fabric being formed a means for interrupting the weft is mounted on the machine frame, the picking nozzle being connected to a pump of the weft insertion system, which is connected to an individual drive, which is mechanically independent of the other subunits and elements of the hydraulic weaving machine, whereby the measuring device, the pump drive, the means for interrupting the weft and the weft stop are connected to the control system of the weaving machine.
  • the weft thread is inserted into the shed of the weaving machine by a flow of a fluid, which is launched into the shed of the hydraulic weaving machine together with the weft.
  • the pressure fluid stream carries the weft through the shed and transports the weft end from one side of the shed to the other side of the shed, thereby inserting the weft into the shed along its entire length, i.e. across the full weaving width of the fabric being formed.
  • the individual devices of the hydraulic weaving machine which participate in the weft insertion process, particularly a mechanism for shed formation, a device for the preparation and insertion of the weft thread into the shed, a hydraulic pump which supplies an appropriate stream of the picking fluid to the picking nozzle at required moments of the weaving cycle, are mutually coupled by mechanical couplings to be properly synchronized.
  • weft insertion into the shed the operator steps on the pedal for manual control of weft insertion, by which means the required dose of the picking fluid is manually fed to the picking nozzle and one weft insertion operation is performed (i.e. weft insertion into the shed).
  • CZ 1990-2875 A3 discloses a solution of removing a weft on an air jet weaving machine, in which the removal of a defectively inserted weft is performed by inserting the following uninterrupted weft while varying the mutual position of the weft insertion means and a binding point. That means that this is a non-static method of weft insertion, which is highly demanding in terms of the speed of weft insertion, synchronization of the individual parts of the machine and acceleration of the machine from standstill so as to perform "cleaning" weft insertion.
  • EP 330 023 CZ 276 602
  • US 4 781 221 disclose various methods of removing weft from the open shed of the weaving machine, in which the machine is stopped, the interruption of the wrongly inserted weft into the shed is prevented and after stopping the machine the machine is reversed to a state of the machine with an open shed in which the weft has been incorrectly inserted .
  • another weft is inserted into the shed and either the created loop of the weft thread is mechanically pulled out of the shed, or the incorrectly inserted weft is removed by the dynamic effect of the subsequently inserted removing weft. Then the machine is restarted to production mode.
  • the disadvantage is some uncertainty about whether all the unnecessary wefts have been removed from the shed before starting the machine.
  • CN 104846513 describes an individual drive of the pump of the picking system, independent of the other nodes and elements of the hydraulic weaving machine, which is capable of changing easily the quantity and timing of the picking means.
  • the aim of the invention is to eliminate or at least minimize the disadvantages of the background art.
  • the aim of the invention is achieved by a method for removing a weft incorrectly inserted by hydraulic pick into the shed of a weaving machine according to claim 1, whose principle consists in that after the static weft insertion, at first the number of threads situated in the control zone is determined and then, according to the number of the threads in the control zone, the control system performs transfer of the new weft to the fell of the fabric being formed, whereupon the machine is either automatically restarted and switched into production mode or it is stopped by the control system and error signalling is initiated.
  • the aim of the invention is further achieved by a hydraulic weaving machine according to claim 4.
  • the principle of the device for removing a weft incorrectly inserted by a hydraulic pick into the shed of a hydraulic weaving machine consists in that on the side of the shed remote from the hydraulic picking nozzle behind created fabric is located a detector of the weft removal, which is also connected to the control system designated for detecting number of threads situated in its control zone.
  • the present invention enables to use a fully automatic removal of a weft incorrectly inserted by hydraulic weft insertion into the shed of a hydraulic weaving machine, which results not only in saving labour for the machine operation and other advantages, but also in increasing overall machine effectiveness by approximately 12 %.
  • Fig. 1 shows an arrangement of the parts of the hydraulic weaving machine used for removing the incorrectly inserted weft
  • Fig. 2 shows a detail of the area of sensing whether removal of the defectively inserted weft has been successful in the status without the inserted weft
  • Fig. 3 shows a detail of the area of sensing whether removal of the defectively inserted weft has been successful in the status with the inserted weft.
  • the invention will be described referring to an example of embodiment of a hydraulic weaving machine, which is widely known, and therefore in the following text no other parts of the hydraulic weaving machine will be mentioned but those parts which are used to implement this invention.
  • the hydraulic weaving machine comprises an unillustrated system of warp threads, which are guided to a mechanism for shed formation.
  • a beating-up device is located behind the mechanism for shed formation in the direction of the motion of warp threads. The final member of the beating-up device ensures the transfer of the weft 9 from the shed to the fell of the fabric being formed.
  • the woven fabric is wound onto a cloth beam.
  • the weft thread is properly arranged in the machine construction, e.g., it is wound on a suitable bobbin.
  • the weft thread is guided to a weft length measuring device 2 , from which it is guided further on to a picking nozzle 5 .
  • the system consisting of the measuring device 2 and the nozzle 5 is arranged on one lateral side of the shed and is directed to the other side of the shed, i.e. in the direction of the width of the fabric being formed, as usually.
  • On the opposite side of the shed i.e.
  • a weft stop 7 and a detector 8 of the weft 9 removal are mounted on the machine frame.
  • a means 6 for interrupting the weft 9 is mounted on the machine frame.
  • the picking nozzle 5 is with its hydraulic distribution system connected to the outlet of the fluid from the pump 4 of the weft insertion system, whereby the mechanical drive of the pump 4 of the weft insertion system is secured by connecting the pump 4 to an individual drive 3 .
  • the individual drive 3 of the pump 4 of the weft insertion system is mechanically independent of the other subunits and elements of the hydraulic weaving machine.
  • the measuring device 2 of the weft, the individual drive 3 of the pump 4 of the weft insertion system, the means 6 for interrupting the weft 9 , the weft stop 7 and the sensor 8 of the weft 9 removal are connected to the control system 1 of the weaving machine.
  • the control system 1 of the weaving machine controls the operation and coordination of the activities of the individual subunits and means of the weaving machine, so that fabric with the required parameters will be produced. That means that the standard weaving process takes place, in which weft threads 9 are blown successively into the shed by the stream of the picking fluid ejected by the picking nozzle 5 , whereby after each successful insertion, which is checked by the weft stop 7 on the other side of the shed, the weft 9 is separated from the other weft threads by the means 6 for interrupting the weft 9 and subsequently the weft 9 is transferred by a beating-up mechanism to the fell of the woven fabric. In this manner, weaving cycles are continuously repeated and fabric is produced.
  • the weft stop 7 detects a state in which the weft 9 with its front end did not extend over the entire width of the weft 9 insertion, i.e. the entire width of the woven fabric enlarged by edge strips, in which the weft 9 exceeds the width of the woven fabric, it emits a signal about this state to the control system 1 , which generates a signal to stop the machine.
  • the signal to stop the machine is generated already during the same revolution of the machine in which the incorrectly inserted weft 9 was detected.
  • the above-mentioned signal to stop the machine prevents the interruption of the detected incorrectly inserted weft 9 at the entrance into the shed by severing from the rest of the weft thread in the measuring device 2 of the weft 9 .
  • this interruption is performed by the means 6 for interrupting the weft 9 .
  • the machine operation is automatically reversed by the control system 1 , i.e. the individual parts of the machine are put in reverse operation to such a position of the individual components of the machine (state), in which the shed with the detected defectively inserted weft 9 is opened, whereby this detected defectively inserted weft 9 is at the entrance into its shed still connected to the weft 9 supply on the measuring device 2 .
  • the detector 8 of the weft 9 removal After inserting the new weft 9 into the shed and therefore after the assumed pulling out (ejection, expulsion, removal) of the previously incorrectly inserted weft 9, the detector 8 of the weft 9 removal, which is located on the side of the shed remote from the picking nozzle 5 , is activated.
  • the detector 8 of the weft 9 removal finds out how many wefts 9 are physically present in the control zone, i.e. at the end of the shed behind the weft stop 7 .
  • control system 1 performs individual transfer of this new weft 9 to the fell of the fabric being formed and puts the hydraulic weaving machine into operating mode of standard fabric production, which means that automatic restart of the hydraulic weaving machine is performed and the machine continues producing the required fabric.
  • weft thread 9 there are more than one weft thread 9 in the control zone, e.g., two or three weft threads, whereby this could be a loop formed by one weft thread 9 when at least two parts of one weft 9 are situated in the control zone, or, on the contrary, there is no weft 9 in the control zone, it means that the attempt to remove the defectively inserted weft 9 has failed.
  • the control system 1 decides on further action according to the nature of the failure. For example, if in the control zone there are more weft threads 9 than one, the whole process, as well as the machine, is automatically stopped and signalling is initiated to show that the defectively inserted weft 9 has not been automatically removed. Similarly, if there is no weft 9 in the control zone, the whole process, as well as the machine, is automatically stopped and signalling is initiated to show that the new weft has not been inserted.
  • the detector 8 of the weft 9 removal comprises an ultrasonic sensor 80 , which is mounted reversibly displaceably on the machine frame in the control zone transversely to the direction of the insertion (picking) of the weft threads 9 .
  • a collecting plate 81 e.g. sheet metal, with a longitudinal opening 810 .
  • the collecting plate 81 extends from the beating-up position of the weaving reed 0, see Fig. 2 , as far as to the position of the weaving reed 0 at back dead centre below the space defined by the size of the shed in a vertical plane, see Fig. 3 .
  • the position of the collecting plate 81 ensures that there are no parts of the weft 9 deposited on its surface. Moreover, the collecting plate 81 is during the machine operation very intensely sprayed by the disintegrating water jet of the hydraulic weft insertion system.
  • the ultrasonic sensor 80 is mounted on a piston rod 820 of a pneumatic cylinder 82 , which is via an unillustrated electro-pneumatic valve connected to a source of compressed air and to the control system 1 .
  • the ultrasonic sensor 80 is further aligned with a air blower nozzle 83 , which is also connected to the source of compressed air whose supply is controlled by the above-mentioned electro-pneumatic valve.
  • the weft 9 properly inserted into the shed lies before being transferred to the fell of the woven fabric on the collecting plate 81 over the longitudinal opening 810 formed in it.
  • the supersonic sensor 80 is blown over by the air blower nozzle 83 , whereupon the supersonic sensor 80 moves across the weft insertion path above the collecting plate 81 and the longitudinal opening 810 formed in it.
  • this motion in reality it represents a path of, e.g., approximately 50mm, the ultrasonic sensor 80 moves at a certain distance above the collecting plate 81 as far as to the back position of the weaving reed 0 , as is shown in Fig.
  • control system 1 decides on further action, i.e. automatic restart or signaling failure status (due to the failure to remove the incorrectly inserted weft 9 or failure to insert a new weft 9 ), as has been described above.
  • the detector 8 of the weft 9 removal comprises an optical sensor instead of an ultrasonic sensor 80 , which is mounted either on the same movable structure as the above-described ultrasonic sensor 80 , or on another suitable structure allowing the optical sensor to move within the control zone.
  • the optical sensor is aligned with a cleaning device, e.g., a air blower nozzle, connected to the source of compressed air and serving to remove the picking fluid and impurities from the optical elements of the optical sensor.
  • the ultrasonic detector 80 is in the unillustrated exemplary embodiment mounted on another suitable structure allowing the movement of the ultrasonic sensor 80 within the control zone.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (10)

  1. Procédé pour enlever la trame (9) mal insérée par le lancement hydraulique dans la gorge d'une machine à tisser hydraulique, dans lequel le système de contrôle, après avoir détecté une trame (9) mal insérée, réalise l'arrêt de la machine, supprime la trame (9) mal insérée et remet la machine en mode de production, à la même vitesse de la machine dans laquelle la trame (9) a été mal insérée le système de commande (1) de la machine génère un signal d'arrêt de la machine et évite une interruption de la trame (9) mal insérée à l'entrée de la gorge de la machine, par la suite, après l'arrêt de la machine, le fonctionnement de la machine est inversé pour revenir à l'état de la machine avec la gorge ouverte, dans lequel la trame (9) a été entrée incorrectement, ensuite, on réalise le lancement hydraulique de la nouvelle trame (9) en tant que le lancement de la trame statique sans déplacer les branches de la gorge ouverte et sans déplacer les moyens pour le transfert de la nouvelle trame (9) vers l'avant du tissu à former, en insérant une nouvelle trame (9), la trame (9) précédemment mal insérée est retirée de la gorge ouverte, à la suite de quoi le succès de l'élimination de la trame est détecté du côté de la gorge plus éloignée de la buse de lancement (5) et éventuellement, la machine redémarre en mode de production ou elle s'arrête et un signal d'erreur est déclenché, caractérisé en ce que, après le lancement statique, le nombre de fils présents dans la zone de contrôle est d'abord déterminé et en fonction du nombre de fils détecté dans la zone de contrôle du côté de la gorge à l'opposé de la buse de lancement (5) par la suite le système de contrôle (1) déplace la nouvelle trame (9) vers l'avant du tissu à produire, suivi du redémarrage automatique de la machine en mode de production ou le système de contrôle (1) arrête la machine et déclenche un signal d'erreur.
  2. Procédé selon la revendication 1, caractérisé en ce que le nombre de fils présents dans la zone de contrôle est déterminé par ultrasons.
  3. Procédé selon la revendication 2, caractérisé en ce qu 'au début de la détection du nombre de fils présents dans la zone de contrôle, le capteur du nombre de fils présents dans la zone de contrôle est nettoyé.
  4. Machine à tisser hydraulique avec le dispositif de retrait de la trame (9) insérée de manière incorrecte par le lancement hydraulique dans la gorge de la machine à tisser hydraulique, qui comprend le dispositif de mesurage (2) de la longueur de la trame (9) associé à la buse de lancement (5), qui est situé sur un côté de la gorge et il est dirigé vers l'autre côté de la gorge dans le sens de la largeur du tissu à former, où le casse-trame (7) est placé sur le châssis de la machine, tandis que dans la région située entre la buse de lancement (5) et le bord proximal du tissu à former le moyen (6) pour interrompre la trame (9) est monté sur le châssis de la machine, tandis que la buse de lancement (5) est relié à la pompe (4) du système de ramassage qui est reliée à un entraînement individuel (3) qui est indépendant mécaniquement des autres pièces et unités de la machine à tisser hydraulique, tandis que le dispositif de mesurage (2), l'entraînement de la pompe (4), le moyen (6) pour interrupter la trame (9) (6) et le casse-trame (7) sont reliés au système de la commande de la machine à tisser (1), caractérisé en ce que du côté de la gorge plus éloigné de la buse de lencement (5) le capteur (8) d'enlèvement de la trame (9) également connecté au système de la commande (1) adapté pour détecter le nombre de fils présents dans la zone de contrôle.
  5. Dispositif selon la revendication 4, caractérisé en ce que le système de la commande (1) est doté d'un programme pour commander la séquence d'opérations successives et sans intervention des opérations contrôlées par l'opérateur pour identifier une trame mal insérée (9), l'enlèvement de la trame mal insérée (9) et son remplacement par une nouvelle trame (9), vérification du retrait de la mauvaise trame (9) et insertion de la nouvelle trame (9) et redémarrage automatique de la machine dans le mode du fonctionnement normal.
  6. Dispositif selon la revendication 4 ou 5, caractérisé en ce que le capteur (8) de retrait de la trame (9) comprend un capteur à ultrasons (80) qui est réglable reversiblement de manière mobile dans la zone de contrôle à travers dans la direction du lancement de la trame (9) et qui est monté sur le chassis de la machine et qui est connecté au système de la commande (1) de la machine.
  7. Dispositif selon la revendication 6, caractérisé en ce qu 'une plaque collectrice (81) avec un alésage longitudinal (810) s'étend au-dessous de la zone de contrôle qui s'étend de la position couchée du tissage (0) jusqu'à la position du rayon de tissage (0) au point mort arrière.
  8. Dispositif selon la revendication 4 ou 5, caractérisé en ce que le capteur (8) de retrait de la trame (9) comprend un capteur optique qui est réglable de manière réversible dans la zone de contrôle à travers dans la direction du lacement des trames (9) qui est monté sur le châssis de la machine et qui est connecté au système de la commande(1) de la machine.
  9. Dispositif selon la revendication 6 ou 8, caractérisé en ce que le capteur à ultrasons (80) ou le capteur optique est monté sur une tige de piston d'un cylindre pneumatique (82) qui est relié à une source d'air comprimé et à un système de la commande de la machine (1).
  10. Dispositif selon la revendication 9, caractérisé en ce qu 'un capteur à ultrasons (80) ou un capteur optique est associé à une buse de soufflage (83) connectée à une source d'air comprimé et à un système de la commande de la machine (1).
EP16206650.0A 2015-12-28 2016-12-23 Procédé pour éliminer une trame mal insérée par un médiator hydraulique dans la foule d'un métier à tisser et dispositif hydraulique permettant de mettre en uvre le procédé Not-in-force EP3187631B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CZ2015-939A CZ2015939A3 (cs) 2015-12-28 2015-12-28 Způsob odstranění útku chybně zaneseného hydraulickým prohozem do prošlupu hydraulického tkacího stroje a zařízení k jeho provádění

Publications (3)

Publication Number Publication Date
EP3187631A2 EP3187631A2 (fr) 2017-07-05
EP3187631A3 EP3187631A3 (fr) 2017-11-15
EP3187631B1 true EP3187631B1 (fr) 2019-11-27

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EP16206650.0A Not-in-force EP3187631B1 (fr) 2015-12-28 2016-12-23 Procédé pour éliminer une trame mal insérée par un médiator hydraulique dans la foule d'un métier à tisser et dispositif hydraulique permettant de mettre en uvre le procédé

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Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0207470B1 (fr) * 1985-06-29 1992-05-13 Nissan Motor Co., Ltd. Méthode et système pour enlever un fil de trame mal inséré
CS276602B6 (en) * 1988-02-25 1992-07-15 Texing Brno Method of weft preparation and its removing from the closed shed of the jet weaving machine
CS675488A2 (en) * 1988-02-25 1991-05-14 Pajgrt Jan Method of weft preparation for its removal from open shed of rapier loom
FR2659361B1 (fr) * 1990-03-06 1994-07-29 Saurer Diederichs Sa Dispositif de detissage automatique pour machines a tisser avec organes d'insertion mecanique de la trame.
CS287590A2 (en) * 1990-06-11 1991-12-17 Texing Brno S P Method of defectively woven-in inseparable weft's loosening and simultaneous repair
JPH0482943A (ja) * 1990-07-18 1992-03-16 Tsudakoma Corp 織機の緯糸フィーラ装置
CZ291397B6 (cs) * 2000-11-29 2003-02-12 Vúts Liberec A. S. Prohozní tryska vzduchového tkacího stroje
CZ20004616A3 (cs) * 2000-12-11 2003-01-15 Trustfin, A. S. Způsob automatického odstranění defektně prohozeného útku na tkacím stroji
CZ20011019A3 (cs) * 2001-03-20 2003-01-15 Trustfin, A. S. Způsob odvodu odpadu útku na doletové straně prohozního systému vzduchových tkacích strojů a zařízení k provádění způsobu
CN104846513A (zh) * 2015-05-29 2015-08-19 苏州华毅机械有限公司 一种运用电子引纬水泵的喷水织机

Non-Patent Citations (1)

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Title
None *

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EP3187631A3 (fr) 2017-11-15
CZ306814B6 (cs) 2017-07-19
EP3187631A2 (fr) 2017-07-05
CZ2015939A3 (cs) 2017-07-19

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