EP2885214A1 - Machine d'emballage - Google Patents

Machine d'emballage

Info

Publication number
EP2885214A1
EP2885214A1 EP13747972.1A EP13747972A EP2885214A1 EP 2885214 A1 EP2885214 A1 EP 2885214A1 EP 13747972 A EP13747972 A EP 13747972A EP 2885214 A1 EP2885214 A1 EP 2885214A1
Authority
EP
European Patent Office
Prior art keywords
cam
sealing jaws
linear
along
guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13747972.1A
Other languages
German (de)
English (en)
Inventor
James PARCELL
Carl LANGDON
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.)
KHS GmbH
Original Assignee
KHS GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KHS GmbH filed Critical KHS GmbH
Publication of EP2885214A1 publication Critical patent/EP2885214A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • B65B51/146—Closing bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8226—Cam mechanisms; Wedges; Eccentric mechanisms
    • B29C66/82263—Follower pin or roller cooperating with a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8246—Servomechanisms, e.g. servomotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83541—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement
    • B29C66/83543—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement cooperating flying jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/87—Auxiliary operations or devices
    • B29C66/874—Safety measures or devices
    • B29C66/8744—Preventing overheating of the parts to be joined, e.g. if the machine stops or slows down
    • B29C66/87443—Preventing overheating of the parts to be joined, e.g. if the machine stops or slows down by withdrawing the heating tools
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/303—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes reciprocating along only one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints

Definitions

  • This invention relates to packaging machines and more specifically to machines for packaging products in tubular bags, so-called pouches.
  • the packaging often involves forming a bag.
  • the shaping of the bag includes, for example, the transport of a two-layer film web through a pair of sealed jaws. The jaws are guided at regular intervals to each other so as to join the two film layers along a sealing line. The distance between two such seal lines determines the size of the bag.
  • Bagging machines usually have a control system for bringing the heat sealing jaws together at the correct intervals.
  • control systems there is no possibility of regulating the pressure in relation to the recipe.
  • the systems lack the flexibility to easily switch between different bag sizes.
  • the invention relates to a device for forming a bag for receiving a product.
  • Such apparatus includes a pair of sealing jaws configured to initially move the jaws toward each other in a first direction and engage a web therebetween; a linear curve configured to move perpendicularly relative to the first direction and a coupling between the linear curve and the sealing jaws for converting the movement along the second direction into a movement along the first direction.
  • the coupling connection includes a cam follower.
  • the linear cam includes a curved guide along the linear cam itself, wherein the coupling connection is provided with a cam roller, which engages in the curved guide.
  • the guide has walls that form a track for receiving a cam roller, as well as those in which the guide has a rail to support the cam roller.
  • the linear cam is provided with walls with which curved first and second guides are formed, which in turn define the first and second travel functions.
  • the coupling connection includes the first and second cam rollers which snap into the first and second curved guides; as well as embodiments in which each of the guides includes an inner region and an outer region, wherein the first and second path function in the inner region has a lower derivative than the first and second path function of the outer region, as well as those additionally with a servomotor are equipped, which causes the movement of the linear curve along a longitudinal direction.
  • the servomotor may be a programmable version.
  • the servomotor is configured to move the linear cam so that the cam followers remain within the first range during bag forming, and to move the linear cam so that the cam followers within the retrace phase are within the range remain second range, during which the sealing jaws are completely lifted off the web or are.
  • the invention in a further aspect, relates to a device for forming bags for receiving product.
  • a device for forming bags for receiving product includes means for heat sealing a web, a linear cam, and means for connecting the linear cam to the means for heat sealing a web.
  • the linear cam includes means for guiding a cam roller which initiates movement of the means for heat sealing a web.
  • Other embodiments also include the means for controlling the movement of the linear cam, and means for implementing a linear curve operation mode and a linear curve return operation mode.
  • the invention features a method to operate a machine for forming bags for receiving product. One such method involves passing a track between two heat seal jaws, translating a linear cam along a first direction whereby the heat seal jaws grip the track, and translating the linear cam along a second direction opposite the first direction, thereby releasing the track jaws ,
  • the method also involves translating the linear curve
  • the method also includes the possibility that a servomotor converts the linear curve accordingly along a first motion profile and a second motion profile.
  • Fig. 1 shows a packaging machine
  • Fig. 2 shows a linear curve of the packaging machine of Fig. 1.
  • a packaging machine 10 shown in FIG. 1, includes the first and second electrically heated heat seal jaws 12A, 12B mounted on the respective first and second rails 14A, 14B aligned along a longitudinal direction 16. These heated heat seal jaws 12A, 12B may extend along a transverse direction 18, perpendicular to the longitudinal direction 16, are moved back and forth.
  • the first sealing jaw 12A is mounted directly on the first rail 14A, whereas the second sealing jaw 12B mounted on a pair of springs 20A, 20B is mounted on the second rail 1B.
  • the second rail 14B must overcome the spring force of the springs 20A, 20B.
  • a web having opposing first and second panels is passed through a narrow slot between the sealing jaws 12A, 12B.
  • the web is made of a material which melts upon application of the pressure and heat exerted by the sealing jaws 12A, 12B.
  • the web stops so that the sealing jaws 12A, 12B can be brought together at a predefined pressure to weld the web panels together along a line. With this process, a bag 28 is made.
  • the gap is kept very tight during operation, on the order of 3/8 inch, so that the sealing jaws 12A, 12B do not have to travel a long distance to produce the sealed seam. Since the sealing jaws 12A, 12B are hot, it is important that the web be moved fast enough for the melting to take place only when the sealing jaws 12A, 12B are brought together and not created by the result of undirected radiant heat as the web travels moved through the slot.
  • the sealing jaws 12A, 12B should move farther apart so that the undirected radiant heat does not melt the web which is just between the sealing jaws 12A, 12B. Usually, the distance is 3 inches.
  • the transverse movement of the rails 14A, 14B is controlled by a servomotor 30 which moves a linear cam 32 along a longitudinal direction 16.
  • the linear cam 32 (better seen in Figure 2) is equipped with first and second curved guides 34A, 34B.
  • first and second curved guides 34A, 34B At any point along the first guide 34A, the direction of the first guide 34A makes an angle relative to the longitudinal direction 16.
  • the value of this angle as a function of position along the first guide 34A defines the first path function. It's the same with everyone Point along the second guide 34 B, the direction of the second guide 34 B at an angle in relation to the longitudinal direction 16 at.
  • the value of this angle defines a second path function.
  • the first and second path functions are symmetrical. For a given coordinate along the transverse direction, the first and second path functions define the same angles with opposite signs.
  • Each guide 34A, 34B has an outer portion 35A in which the absolute values of the path functions are within a first range, and an inner portion 35B within which the absolute values of the path functions are within a second range. Except for the point where the inner and outer parts meet, the values of a guide path function within the inner part 35B thereof are smaller than the values of the path function within the outer part 35A thereof. Moreover, except for the point where the inner and outer parts meet, the derivative of the path function of a guide within its outer part 35A is greater than the derivative within its inner part 35B.
  • the first rail 14A is connected to a first cam roller 36A, so that the transverse movement of the first cam roller 36A generates the transverse movement of the first rail 14A.
  • the first cam roller 36A is seated in the first guide 34A of the linear cam 32 and thus moves sideways in accordance with the travel function of the first guide. Accordingly, the first rail 14A also moves sideways as soon as the servo motor 30 triggers the longitudinal movement 16 of the linear cam 32.
  • the first cam roller 36A is pushed outward in the transverse direction by the first guide 34A, causing the first track 14A to move outwardly in the transverse direction 18. Conversely, when the linear cam 32 is moved outwardly in the longitudinal direction 16, the first cam roller 36A is pushed inward along the transverse direction by the first guide 34A, thereby moving the first rail 14A inwardly along the transverse direction 18.
  • the second rail 14B is connected to a second cam roller 36B which runs in the second guide 34B. Accordingly, the second curve, as shown by the fixed second path function, either inward or outward in the transverse direction 18 move.
  • the second track 14B also moves outwardly in the transverse direction 18 in the same manner as previously described in connection with the first track 14A.
  • the magnitude of the applied pressure is controlled by the extent to which the linear cam 32 is moved outwardly beyond the point where the sealing jaws 12A, 12B meet.
  • the length of time during which the pressure is applied is referred to as the hold time of the servomotor 30 in just that position.
  • Servo motor 30 may also be programmed to apply a time varying pressure. For example, if one wishes to change the applied pressure from one value to a second value, one need only program the servomotor 30 to incrementally move the linear cam 32 from a corresponding first position to a second position. In operation, the servo motor 30 generally moves the linear cam 32 so that the cam rollers 36A, 36B remain within the inner portion 35B. This ensures that the sealing jaws 12A, 12B remain in the open position at a relatively short distance from each other. As a result, the sealing jaws 12A, 12B can be guided to each other quickly.
  • the sealing jaws 12A, 12B further apart, so that the heat emitted by the sealing jaws undirected heat does not melt the web in an uncontrolled manner.
  • the servomotor 30 moves the linear cam 32 inwardly enough that the cam rollers 36A, 36B enter the outer part 35A of the linear cam 32. Since the path functions at the outer part 35A cause a greater derivative, the cam rollers 36A, 36B are quickly further separated, and thus inevitably the rails are moved further apart, thereby creating a spatially greater distance between the sealing jaws 12A, 12B.
  • Guides 34A, 34B may have various shapes.
  • the guide includes walls that form a track; in this case, the cam rollers 36A, 36B are projections projecting on the rails 14A, 14B.
  • a guide 34A may also be a mono-rail; in this case, the cam roller 36A would then have a track in which the track runs and possibly also has wheels for rolling along on the mono track.
  • the guide 34A could be configured as a track with two rails, and in this case the cam roller 36A would be a flanged wheel carriage to engage the rails.
  • a linear cam 32 in, as described herein, a packaging machine 10 provides numerous advantages over a cam in conventional machines. First, it is precisely this packaging machine 10 that can more easily meet the various performance requirements, such as variable pressures and different time intervals between the sealing operations. This is due to the fact that the cam 32nd driving servo motor 30 can be easily reprogrammed to implement in the linear cam 32 different size values and different speeds along the various parts of the guide / s 34A, 34B. In standard packaging machines, such changes must change the geometry of the cam. In addition, the use of a linear cam 32 allows the sealing jaws 12A, 12B to be withdrawn quickly and easily by the servomotor 30 simply controlling the cam rollers 36A, 36B along the outer portion 35A of the linear cam 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Package Closures (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

Dispositif pour former un sac destiné à contenir un produit, comprenant : une paire de mâchoires de scellement conçue de sorte que lesdites mâchoires de scellement se meuvent l'une sur l'autre selon un premier mouvement, tout en saisissant la bande de matière guidée entre elles ; une came linéaire qui est conçue pour se mouvoir dans une deuxième direction opposée à la première direction ; ainsi qu'une liaison de couplage entre la came linéaire et les mâchoires de scellement, destiné à convertir un mouvement s'effectuant dans une deuxième direction en un mouvement s'effectuant dans la première direction.
EP13747972.1A 2012-08-17 2013-08-01 Machine d'emballage Withdrawn EP2885214A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/588,357 US20140047802A1 (en) 2012-08-17 2012-08-17 Packaging machine
PCT/EP2013/002282 WO2014026737A1 (fr) 2012-08-17 2013-08-01 Machine d'emballage

Publications (1)

Publication Number Publication Date
EP2885214A1 true EP2885214A1 (fr) 2015-06-24

Family

ID=48979703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13747972.1A Withdrawn EP2885214A1 (fr) 2012-08-17 2013-08-01 Machine d'emballage

Country Status (3)

Country Link
US (1) US20140047802A1 (fr)
EP (1) EP2885214A1 (fr)
WO (1) WO2014026737A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105292550B (zh) * 2015-10-21 2017-10-17 广东机电职业技术学院 物料自动装袋封口的塑膜包装机及其包装方法
US9969143B2 (en) * 2015-11-10 2018-05-15 Khs Gmbh Bag forming apparatus
IT201700117793A1 (it) * 2017-10-18 2019-04-18 Mbp Srl Confezionatrice verticale con sistema di saldatura a cartuccia

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DE3204773A1 (de) * 1982-02-11 1983-08-18 Altstädter Verpackungs-Vertriebsgesellschaft mbH, 6102 Pfungstadt Vorrichtung zum verschliessen einer fluessigkeitspackung
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US5289671A (en) * 1992-09-30 1994-03-01 Automated Packaging Systems, Inc. Packaging machine and method
US6138442A (en) * 1998-10-13 2000-10-31 Kliklok Corporation Packaging machine with continuous sealing jaw movement
US6481188B1 (en) * 2000-06-30 2002-11-19 Owens Corning Fiberglas Technology, Inc. Apparatus and method for sealing an article
US6913056B2 (en) * 2002-01-31 2005-07-05 Baxter International Inc. Apparatus and method for connecting and disconnecting flexible tubing
CA2519196A1 (fr) * 2003-03-27 2004-10-14 Swf Companies, Inc. Formeuse-remplisseuse-scelleuse rapide a action continue
DE10331360A1 (de) * 2003-07-11 2005-01-27 Rovema Verpackungsmaschinen Gmbh Vorrichtung zum Verschweissen eines Folienschlauches
DE102004043096B4 (de) * 2004-09-07 2013-06-20 Rovema Gmbh Vorrichtung zum Verschweißen eines Folienschlauches
DE102004049375A1 (de) * 2004-10-09 2006-04-13 Rovema Verpackungsmaschinen Gmbh Verfahren und Vorrichtung zum Positionieren einer Schweißbacke
DE102006022192B4 (de) * 2006-05-12 2009-08-27 Rovema - Verpackungsmaschinen Gmbh Vorrichtung zum Verschweißen einer Folienbahn
US9533780B2 (en) * 2010-09-06 2017-01-03 Tetra Laval Holdings & Finance S.A. Apparatus for sealing an open end of a container

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Title
See references of WO2014026737A1 *

Also Published As

Publication number Publication date
WO2014026737A1 (fr) 2014-02-20
US20140047802A1 (en) 2014-02-20

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