EP2415917B1 - Aiguille de type compound pour machine à tricoter rectiligne - Google Patents

Aiguille de type compound pour machine à tricoter rectiligne Download PDF

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Publication number
EP2415917B1
EP2415917B1 EP11006394.8A EP11006394A EP2415917B1 EP 2415917 B1 EP2415917 B1 EP 2415917B1 EP 11006394 A EP11006394 A EP 11006394A EP 2415917 B1 EP2415917 B1 EP 2415917B1
Authority
EP
European Patent Office
Prior art keywords
hook
tongue
needle
slider
face
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
EP11006394.8A
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German (de)
English (en)
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EP2415917A1 (fr
Inventor
Minoru Sonomura
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.)
Shima Seiki Mfg Ltd
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Shima Seiki Mfg Ltd
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Publication of EP2415917A1 publication Critical patent/EP2415917A1/fr
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Publication of EP2415917B1 publication Critical patent/EP2415917B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
    • D04B35/06—Sliding-tongue needles

Definitions

  • the present invention relates to a compound needle for a flatbed knitting machine, which is put in a needle groove formed on a needle bed of the flatbed knitting machine, is used for knitting a fabric and opens and closes a hook with a slider.
  • a compound needle which opens and closes a hook with a slider, has been used as a knitting needle in case miniaturization, improved productivity or the like being intended.
  • a needle body which has the hook at a front end thereof, makes slide move in a needle groove
  • a slider which is put in a slider groove formed on the needle body, moves relatively to the needle body.
  • the slider has a tongue at a leading end side thereof and a front end of the tongue contacts a steeple head of the hook to close the hook when an operation to form a knitted loop in which a new loop is formed on the hook.
  • the tongue also has a function to guide an old loop held on an upper edge of the tongue such that the old loop climbs over an upper edge of the closed hook and making the old loop be knocked over.
  • the old loop hung on the hook moves backward relatively to the hook and moves to the upper edge of the tongue when the hook advances to a needle bed gap before the hook is closed by the tongue. If a knitting yarn is fed to the hook in the needle bed gap, when the hook is pulled in to the needle bed, the knitting yarn is caught in the hook and a new loop is formed in the hook. If the front end of the tongue is made to contact the steeple head of the hook to close the hook and the needle body and the slider are further pulled in to the needle bed, the old loop is knocked over.
  • a bottom face of the slider groove is formed as a cam face including a rising slope and a declining slope which move the tongue in the up-down direction in some cases (for example, see Patent Literature 1).
  • Patent Literature 1 Japanese Patent No. 3886903
  • Prior art document EP 1 229 158 A1 discloses a compound needle with a first knitting member having a fork portion extending forwardly formed in an upper portion of a side wall of the first knitting member at an accommodation groove forming portion thereof where the accommodation groove for accommodating the second knitting member is formed, while also the second knitting member has a guiding portion formed to be curved outwardly so that its upper surface can confront a lower surface of the fork portion formed on the side wall of the first knitting member, so that while the second knitting member is moved relative to the first knitting member 5, the guiding portion of the second knitting member is guided into a space formed under the fork portion of the first knitting member and supported by the fork portion during at least part of the relative movement.
  • a composite needle of a knitting machine which comprises a needle body having at the tip end a hook, a slider formed by superposing two blades, wherein the composite needle of the knitting machine is formed such that a blade groove provided in the needle body supports the blades of the slider when the needle body and the slider can separately slide in the forward and backward directions.
  • a compound needle is known from document GB 2 043 714 A which comprises a hook member with a hook, and a slider member having one end portion to close the hook.
  • the hook member has a recess to receive the end portion when the hook is opened by relative lifting of the hook member.
  • the hook member has a recess to receive a tongue on the slider member and the cooperating upper edges of these cam the end portion outwardly as the hook member retracts relative to the slider member. This movement also carries a loop out of the hook to be cast off over the hook.
  • the needle body is made to move forward and backward with respect to the needle bed gap while the slider is almost stopped in a state where the old loop is held on the upper edge of the tongue.
  • the needle body which has received the yarn feeding on the hook moves backward from the needle bed gap and gets closer to the tongue so as to close the hook, the tongue tries to rise relatively with an action by the rising slope of the slider groove and the old loop is pulled in downward in the needle bed gap.
  • An object of the present invention is to provide a compound needle for a flatbed knitting machine which can make a slider hard to move backward owing to a pulling force, which acts on an old loop, to a downside of a needle bed gap, even if a state where a tongue ascends relatively is temporarily held, while the tongue is moved relatively so as to close a hook.
  • the present invention is a compound needle for a flatbed knitting machine, being combined a needle body which is put in a needle groove formed on a needle bed of the flatbed knitting machine in a state where the needle body is movable to slide in a front-rear direction and has a hook at a front portion, and on which a slider groove is formed rearward with respect to the hook, with a slider of which lower portion is put in the slider groove of the needle body and which has a tongue, capable of hanging a knitted loop at a front portion, and moves relatively to the needle body to open and close the hook by the tongue, and on a bottom face of the slider groove, a rising slope which makes the tongue rise such that a leading end of the tongue reaches a height at which the leading end of the tongue contacts a steeple head of the hook when the slider is made closer to the hook so as to close the hook by the tongue, and a flat face which makes the risen tongue closer to the hook at a constant height, being formed as a continuous cam face, comprising a bottom portion
  • said contacting portion on the bottom portion of the slider has a circular arc shape and makes point contact with said flat face.
  • said tongue is divided into two blades and sandwiches the steeple head of said hook from both sides when the hook is closed
  • a bottom portion of a slider on which a bottom face of a slider groove acts as a cam face has a slide contact portion and a contacting portion.
  • the slide contact portion makes slide contact with a flat face on the bottom face of the slider groove such that the tongue is made closer to the hook at a constant height when the hook is closed by the tongue.
  • the contacting portion projects to the side of the bottom face of the slider groove from a front portion of the slide contact portion so as to abut against the flat face in advance of the slide contact portion at a stage where the slide contact portion makes a transition from a rising slope on the bottom face of the slider groove to the flat face.
  • the contacting portion contacts the flat face on the bottom face of the slider groove in advance of the slide contact portion, so that, even if a pulling force to a downside of the needle bed gap acts on an old loop, component forces are generated in the direction along the flat face and in the direction perpendicular to the flat face.
  • a pulling force to a downside of the needle bed gap acts on an old loop
  • component forces are generated in the direction along the flat face and in the direction perpendicular to the flat face.
  • the contacting portion is made to contact the flat face, a component force is generated not in the direction that the slider is moved backward along the rising slope but in the direction along the flat face, therefore, the slider can be made hard to move backward.
  • the contacting portion on the bottom portion of the slider has a circular arc shape and makes point contact with the flat face, so that, when the contacting portion contacts the flat face on the bottom face of the slider groove, only a component force in the direction perpendicular to the flat face can be made to be generated and a component force in the direction that the slider moves backward along the flat face can be made not to be generated.
  • two blades of the slider smoothly open and close the hook, even if a downward pulling force in the needle bed gap acting on the old loop is increased, the slider is made hard to move backward so that the old loop can be reliably knocked over.
  • the compound needle 1 in the drawings is illustrated in a state where the compound needle 1 is put in a needle groove formed on a needle bed of a flatbed knitting machine.
  • the needle bed of the flatbed knitting machine is inclined upward toward a needle bad gap located at the front side of the needle groove and downward away from the needle bed gap as shown in Fig. 4 , however, the compound needle 1 in Fig. 1 to Figs. 3 is shown in a horizontal posture.
  • a right hand indicates a front side as the needle bed gap side and a left hand indicates a rear side away from the needle bed gap.
  • an upside in the drawings indicates a direction that the compound needle 1 floats from the needle groove and a downside in the drawings indicates a direction that the composite needle 1 sinks in the needle groove.
  • a needle body 2 makes slide move in the needle groove of the needle bed in the right-and-left direction of Fig. 1 .
  • a hook 3 is provided on a front end of the needle body 2 and a guiding portion presser 2a is formed at a rearward distanced from the hook 3.
  • a slider groove 4 is provided on a needle shank 2b including the guiding portion presser 2a at the rearward with respect to the hook 3. The slider groove 4 is opened on an upper face of the needle shank 2b.
  • a lower portion of a slider 5 is put in, and if the lower portion of the slider 5 makes slide move in the slider groove 4, the slider 5 can move relatively to the needle body 2.
  • a tongue 6 is formed on a front end of the slider 5 and an old loop can be held on an upper edge 6a thereof.
  • a fall preventing portion 6b which is made higher than the upper edge 6a is provided at a leading end of the tongue 6 so that the old loop held on the upper edge 6a does not fall.
  • the hook 3 is opened in a state where the fall preventing portion 6b at the leading end of the tongue 6 is separated to the rearward from a steeple head 3a of the hook 3.
  • the hook 3 is opened and closed by the tongue 6 with the relative movement of the slider 5 with respect to the needle body 2.
  • the movement of the slider 5 with respect to the needle groove is performed through a base body 7.
  • the slider 5 and the base body 7 combine with each other at the left side out of a range shown within the drawing.
  • a butt provided on the base body 7 is driven by a cam so that the driving of the slider 5 is performed.
  • a butt provided on a needle jack which is combined to the needle body 2 at the left side out of a range shown in the drawing is driven with a cam so that the hook 3 is moved forward and backward with respect to a needle bed gap 8 with the movement of the needle body 2 in the needle groove.
  • needle beds at front and rear sides are opposed to each other and a center line 8a extends in the vertical direction.
  • the direction that the center line 8a extends is indicated not by an up and down direction but by a diagonally right up direction.
  • a cam face including a rising slope 4a, a flat face 4b and a declining slope 4c is formed on a bottom face of the slider groove 4 in which the lower portion of the slider 5 is put in.
  • the cam face guides a bottom portion of the tongue 6 and moves the tongue 6 in the up-down direction when the tongue 6 makes closer to and closes the steeple head 3a of the hook 3. If the tongue 6 closes the steeple head 3a of the hook 3, the old loop held on the upper edge 6a of the tongue 6 can be made to pass through the upper edge 3b of the hook 3 so as to be knocked over.
  • a slide contact portion 6c, which make slide contact with the cam face, and a contacting portion 6d are provided on the bottom portion of the tongue 6.
  • the slide contact portion 6c makes slide contact with the cam face at leftward from the rising slope 4a, that is the rising slope 4a and the flat face 4b. However, at the time of the yarn catching when yarns are fed from a yarn feeder port 9 to the hook 3 in the needle bed gap 8, as shown in Fig. 1 , the slide contact portion 6c is retained in the vicinity of a portion where the slide contact portion 6c moves from the rising slope 4a to the flat face 4b and a state where the contacting portion 6d contacts the flat face 4b is temporarily held.
  • a step portion 6e is formed between the slide contact portion 6c and the contacting portion 6d and the step portion 6e has a shape which is concave to an upside in comparison with a conventional shape 6f.
  • a shoulder portion 5a and a guiding portion 5b of the slider 5 are provided on the rear portion of the tongue 6.
  • the guiding portion 5b is pressed by the guiding portion presser 2a in a state where the slider 5 is moved backward with respect to the needle-body 2 to the maximum.
  • the shoulder portion 5a defines a backmost position at which a knitted loop held on the upper edge 6a of the tongue 6 is moved backward to the maximum.
  • the knitted loop held on the upper edge 6a receives a pulling force to the downside of the needle bed gap 8.
  • the contacting portion 6d contacts the flat face 4b on the bottom portion of the tongue 6 on which the bottom face of the slider groove 4 acts as a cam face.
  • the pulling force acting on the knitted loop acts in a downward direction in Fig. 1 and the direction that the pulling force acts is substantially identical to the direction that the contacting portion 6d contacts the flat face 4b. Therefore, since a component force in the direction along the flat face 4b is hardly generated with the pulling force, the slider 5 is made hard to move backward.
  • the contacting portion 6d has a linear shape such that the contacting portion 6d makes line contact with the flat face 4b for a short distance, for example, a component force generated in the direction along the flat face 4b makes it possible to make the slider 5 hard to move backward.
  • the contacting portion 6d has a circular arc shape and makes point contact with the flat face 4b, only a component force in the direction constantly perpendicular to the flat face 4b is generated and a component force in the direction along the flat face 4b is not generated. Therefore, in such a case, the slider 5 can be made further hard to move backward.
  • Fig. 2 shows the compound needle 1 and the needle body 2, the slider 5 and the needle jack 10 as main parts of the compound needle 1 in a combined state and exploded states.
  • the slider 5 and the base body 7 are combined to each other with a combining portion 5d and the slider 5 is moved by a driving force received on a driving butt 7b.
  • An auxiliary butt 7c is also provided so as to be adjacent to the driving butt 7b.
  • the needle body 2 has a combining concave 2c in the vicinity of a rear end thereof.
  • the needle jack 10 is bonded to the needle body 2.
  • a tail portion of the needle jack 10 becomes an elastic leg 10a and elastically floats from a bottom face of the needle groove.
  • a driving butt 10b is provided on the middle of the needle jack 10 and receives driving for making the needle body 2 to slide move in the needle groove.
  • a combining convex 10c is provided on a front end of the needle jack 10. The combining convex 10c is combined to the combining concave 2c of the needle body 2 so that the needle body 2 and the needle jack 10 are combined. A combination of the base body 7 and the slider 5 can be moved relatively to the needle jack 10 and the needle body 2 which are combined to each other in this manner.
  • Figs. 3 shows knitting operations of the knit by moving the slider 5 relatively to the needle body 2 in the compound needle 1 of Fig. 1 . Though the needle body 2 also moves with respect to the needle groove in some cases, Figs. 3 shows the operations in a state where the needle body 2 is relatively stopped and the slider 5 is relatively moved.
  • Fig. 3(a) shows a state where the slider 5 moves backward with respect to the needle body 2 to the maximum.
  • the hook 3 is made into a state of advancing to the needle bed gap 8 to the maximum.
  • the old loop hung in the hook 3 before the hook 3 is made to advance to the needle bed gap 8 moves to the tongue 6 side along the upper edge of the needle shank 2b as the needle body 2 advances to the needle bed gap 8.
  • the fall preventing portion 6b of the tongue 6 sinks in the slider groove 4 and does not protrude from the upper edge of the needle shank 2b, so that the old loop can smoothly be moved relatively onto the upper edge 6a of the tongue 6.
  • Fig. 3(b) shows a state at the time of the yarn catching in which the hook 3 receives yarn feeding as shown in Fig. 1 . If the slider 5 is almost stopped with respect to the needle groove, the needle body 2 is slightly moved backward with respect to the needle groove, and the hook 3 is moved backward to a yarn feeding position from the most-advanced position from the state of Fig. 3(a) , the slide contact portion 6c on the bottom portion of the tongue 6 makes slide contact with the rising slope 4a so that the tongue 6 can be risen such that the upper edge 6a and the fall preventing portion 6b are located at positions higher than the upper edge of the needle shank 2b.
  • Fig. 3(c) shows a state, in which the slider 5 is stopped at a position as is shown in Fig. 3(b) and the needle body 2 is moved backward with respect to the needle bed gap 8 so as to pull in the hook 3 to the needle bed. If the slide contact portion 6c on the bottom portion of the tongue 6 makes slide contact with the flat face 4b, the contacting portion 6d is separated from the flat face 4b and does not receive an action from the cam face. The knitting yarn is caught in the hook 3.
  • Fig. 3(d) shows a state, in which the steeple head 3a of the hook 3 contacts the fall preventing portion 6b at the front end of the tongue 6 and the hook 3 is closed by the tongue 6.
  • a new loop is formed in the hook 3 by pulling in the hook 3 to the needle bed side. If the hook 3 is further pulled in, the old loop held on the upper edge 6a of the tongue 6 passes through the upper edge 3b of the hook 3 and is knocked over.
  • the declining slope 4c for making the tongue 6 decline is provided so that the fall preventing portion 6b does not hinder the movement of the old loop when the old loop is knocked over.
  • the flat face 4b may be extended to the front end of the bottom face of the slider groove 4 without providing the declining slope 4c on the bottom face of the slider groove 4 as long as the movement of the old loop is not hindered.
  • the slider 5 is structured to be divided into two blades which are lined in the direction perpendicular to a paper plane.
  • a leading end side of the tongue 6 is also divided into two and the fall preventing portions 6b sandwich the steeple head 3a from both sides when the steeple head 3a of the hook 3 is closed by the leading end of the tongue 6 as shown in Fig. 3(d) .
  • the slider 5 is divided into two blades, not only the hook 3 can be closed by the leading end of the tongue 6 as shown in Fig. 3(d) but also the two blades can be made to advance to the needle bed gap 8 beyond the hook 3 so as to perform stitch transferring.
  • a path switching of a cam groove acting on the driving butt 7b is performed many times. If the slider 6 is moved backward in the middle of the guiding, there arises a risk that the slider 6 is guided to a different path and a malfunction is caused. If the contacting portion 6d is provided on the bottom portion of the tongue 6 so as to make the slider 6 hard to move backward, the risk of the malfunction can be reduced. Further, the slider 5 which is not divided into two blades may be used. In this case, when the state at the time of the yarn catching of the knit is temporarily held, the slider 5 can be also made hard to move backward as in the case of the above-mentioned slider 5 which is divided into two blades.
  • Fig. 4 shows a state at the time of the yarn catching of the knit as knitting the fabric in the vicinity of a leading end of a needle bed 11 as in Fig. 1 and Fig. 3(b) .
  • An old loop 12 held on the upper edge 6b of the tongue 6 is continuous to a fabric 13 dropping to the downward of the needle bed gap 8.
  • the knit fabric 13 is pulled to the downward of the needle bed gap 8 with a pulling-down device.
  • a movable sinker 14 which pushes the old loop 12 and the fabric 13 to the downward of the needle bed gap 8 is used in some cases.
  • the movable sinker 14 pushes the old loop 12 to the downward of the needle bed gap 8 with a yarn receiving portion 14a.
  • the bottom portion of the tongue 6 contacts the flat face 4b on the bottom face of the slider groove 4 at the contacting portion 6d having a circular arc shape in a point contact manner, so that a component force which moves the slider 5 backward is hardly generated on the contacting portion 6d.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Claims (2)

  1. Aiguille composée (1) pour une machine à tricoter à plat combinant un corps d'aiguille (2) qui peut être placé dans une rainure d'aiguille formée sur une fonture (11) d'une machine à tricoter à plat de telle sorte que le corps d'aiguille (2) soit mobile en avant et en arrière par rapport à un intervalle entre fontures (8) de la machine à tricoter à plat, et qui comporte un crochet (3) au niveau d'une partie avant et une rainure de coulisseau (4) formée en arrière par rapport au crochet (3),
    avec un coulisseau (5) dont la partie inférieure est placée dans la rainure de coulisseau (4) du corps d'aiguille (2) et qui comporte une languette (6) capable de maintenir une boucle tricotée, au niveau d'une partie avant et qui est mobile par rapport au corps d'aiguille (2) pour ouvrir et fermer le crochet (3) par la languette (6), dans lequel
    sur une face inférieure de la rainure de coulisseau (4) une pente montante (4a), qui fait monter la languette (6) de telle sorte qu'une extrémité avant de la languette (6) atteigne une hauteur à laquelle l'extrémité avant de la languette (6) contacte une tête de flèche (3a) du crochet (3) quand le coulisseau (5) est déplacé pour s'approcher du crochet (3) de façon à fermer le crochet (3) par la languette (6), et une face plate (4b), sur laquelle la languette montée (6) peut ensuite se rapprocher du crochet (3) à une hauteur constante, sont formées comme face de came continue, dans laquelle,
    une partie inférieure du coulisseau (5) sur laquelle la face inférieure de la rainure de coulisseau (4) agit comme face de came comporte
    une partie de contact coulissant (6c) qui réalise un contact coulissant avec la face plate (4b) sur la face inférieure de la rainure de coulisseau (4) lorsque la languette (6) est déplacée pour se rapprocher du crochet (3) à la hauteur constante et lorsque le crochet (3) est fermé par la languette (6), et
    une partie de contact (6d) qui est prévue sur la partie inférieure de la languette (6) et qui fait saillie vers l'avant de la partie de contact coulissant (6c) vers le côté de la face inférieure de la rainure de coulisseau (4) de façon à contacter la face plate (4a) en avance par rapport à la partie de contact coulissant (6c) à un stade où la partie de contact coulissant (6c) fait la transition entre la pente montante (4a) sur la face inférieure de la rainure de coulisseau (4) et la face plate (4b),
    caractérisé par
    une partie en échelon concave (6e) formée entre la partie de contact coulissant (6c) et la partie de contact (6d), et la partie de contact (6d) ayant une forme d'arc circulaire et faisant un contact ponctuel avec la face plate (4b).
  2. Aiguille composée (1) de la machine à tricoter à plat selon la revendication 1, caractérisé en ce que
    la languette (6) est divisée en deux lames et prend en sandwich la tête de flèche (3a) du crochet (3) des deux côtés quand le crochet (3) est fermé.
EP11006394.8A 2010-08-06 2011-08-03 Aiguille de type compound pour machine à tricoter rectiligne Active EP2415917B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2010178134A JP5719544B2 (ja) 2010-08-06 2010-08-06 横編機の複合針

Publications (2)

Publication Number Publication Date
EP2415917A1 EP2415917A1 (fr) 2012-02-08
EP2415917B1 true EP2415917B1 (fr) 2014-03-12

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EP (1) EP2415917B1 (fr)
JP (1) JP5719544B2 (fr)
CN (1) CN102373573B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013105239A1 (de) * 2013-05-22 2014-11-27 Groz-Beckert Kg Schiebernadel
CN103334223A (zh) * 2013-07-04 2013-10-02 宁波慈星股份有限公司 一种用于横编机的织针

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908022A1 (de) * 1979-03-01 1980-09-04 Terrot Strickmaschinen Gmbh Schiebernadel fuer strickmaschinen
JP2946323B2 (ja) * 1997-05-01 1999-09-06 株式会社島精機製作所 横編機の複合針
TW477845B (en) * 1999-10-27 2002-03-01 Shima Seiki Mfg Guide mechanism of knitting member and compound needle assembling the guide mechanism therein
WO2002034985A1 (fr) 2000-10-20 2002-05-02 Shima Seiki Mfg.,Ltd. Aiguille composite
KR100906752B1 (ko) * 2001-08-24 2009-07-09 가부시키가이샤 시마세이키 세이사쿠쇼 편기의 복합침
KR101062665B1 (ko) * 2002-12-20 2011-09-06 가부시키가이샤 시마세이키 세이사쿠쇼 복합바늘
JP3983720B2 (ja) * 2003-06-25 2007-09-26 株式会社島精機製作所 複合針

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JP5719544B2 (ja) 2015-05-20
CN102373573B (zh) 2014-08-13
JP2012036531A (ja) 2012-02-23
EP2415917A1 (fr) 2012-02-08
CN102373573A (zh) 2012-03-14

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