EP1876273B1 - Greifer, sein Herstellungsverfahren, Vorrichtung zum Eintragen von Schussfäden, die mit einem solchen Greifer ausgestattet ist, und Webmaschine mit einer derartigen Vorrichtung - Google Patents

Greifer, sein Herstellungsverfahren, Vorrichtung zum Eintragen von Schussfäden, die mit einem solchen Greifer ausgestattet ist, und Webmaschine mit einer derartigen Vorrichtung Download PDF

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Publication number
EP1876273B1
EP1876273B1 EP20070356091 EP07356091A EP1876273B1 EP 1876273 B1 EP1876273 B1 EP 1876273B1 EP 20070356091 EP20070356091 EP 20070356091 EP 07356091 A EP07356091 A EP 07356091A EP 1876273 B1 EP1876273 B1 EP 1876273B1
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EP
European Patent Office
Prior art keywords
rapier
reinforcement
flexible part
claw
lance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP20070356091
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English (en)
French (fr)
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EP1876273A1 (de
Inventor
Martin Burkert
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.)
Schoenherr Textilmaschinenbau GmbH
Schonherr Textilmaschinenbau BMBH
Original Assignee
Schoenherr Textilmaschinenbau GmbH
Schonherr Textilmaschinenbau BMBH
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.)
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Publication date
Application filed by Schoenherr Textilmaschinenbau GmbH, Schonherr Textilmaschinenbau BMBH filed Critical Schoenherr Textilmaschinenbau GmbH
Publication of EP1876273A1 publication Critical patent/EP1876273A1/de
Application granted granted Critical
Publication of EP1876273B1 publication Critical patent/EP1876273B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D03D47/276—Details or arrangement of sprocket wheels
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms

Definitions

  • the present invention relates to a lance for a loom and to a weft insertion device.
  • the invention also relates to a loom equipped with such a lance or such an insertion device, and to a method of manufacturing such a lance.
  • a weft yarn insertion lance for a loom according to the preamble of claim 1 is known from EP 0 623 694 A1 .
  • the drive wheels of the lances each have an axis of rotation substantially parallel to the axis of the chain.
  • the flexible portions or ribbon of these lances thus have openings of engrainement disposed on the upper and lower faces of the ribbons which are substantially horizontal.
  • the method of attachment of the claws on the ribbons of the known lances is such that the claws are not oriented correctly to grasp the frames before insertion into the crowd or to allow to effectively adjust the claws in an exchange position of the weft son between two lances.
  • weft threads used in certain applications are very tight, to the point that the connection between the flexible part of a lance and the associated claw undergoes significant stresses that can lead to the rupture of spear.
  • the invention more particularly intends to provide by proposing a new lance in which the connection between the claw and one end of the flexible part is particularly robust, while allowing a correct orientation of the claw by ratio to the weft and the crowd, while the drive wheel of the lance can have an axis of rotation not parallel to the axis of the chain.
  • the invention relates to a weaving weft insertion lance for a loom, said lance comprising a flexible portion and a hooking claw of a weft thread fixed on one end of the flexible part.
  • This lance is characterized in that the aforementioned end of the flexible portion comprises a longitudinal slot in which a reinforcement is immobilized, this reinforcement being provided with at least one housing for receiving a mounting tab of the claw, and what the lance comprises means for immobilizing the or each leg of the claw in the corresponding housing.
  • the claw of a lance is the part of this lance which allows the attachment of a weft thread.
  • a "claw” may also be called “head” or “clamp” of the lance.
  • the reinforcement and the immobilization means allow effective attachment of the claw on the end of the flexible portion of the lance.
  • the reinforcement also makes it possible to ensure the orientation of the claw relative to the direction of advance of the lance.
  • the invention also relates to a device for inserting weft yarns for a loom which comprises at least one lance as previously described and a comb equipped with means, distributed along its length, for guiding the flexible part of the loom. spear.
  • Such a weft insertion device allows effective guidance of the lance over the length of its stroke.
  • the guiding means comprise a series of tabs each provided with a through hole of the flexible part, this orifice being substantially complementary to the cross section of the end of the flexible portion of the lance equipped with the reinforcement.
  • the invention also relates to a loom equipped with a lance or a weft insertion device as mentioned above.
  • steps b) and c), on the one hand, and d), on the other hand, can be reversed with respect to that indicated above.
  • the trade M represented to figures 1 and 2 is intended for the formation of two plies N 1 and N 2 of tissues, for example two carpets T 1 and T 2 woven simultaneously and separated from each other by a knife 1 hair cutter carried by a carriage 2 and arranged downstream of two strike points P 1 , P 2 towards which converge respectively two crowds F 1 , F 2 defined by the warp yarns 4 of the loom whose vertical movement is controlled by heddles 3 actuated by a Jacquard harness as well as by warp yarns 4 'whose vertical movement is controlled by healds mounted on heald frames 3', themselves driven by a dobby or a cam mechanism not shown.
  • the weft threads 5 1 and 5 2 intended to constitute, with the corresponding warp threads, the plies N 1 and N 2 are inserted into the crowds F 1 and F 2 by means of two lances 11 and 12 each comprising a head or claw 111, respectively 121, on which can be hung a weft thread 1 or 5 2 , and a flexible strip 112, respectively 122, for driving the corresponding claw in the direction of two axes Y 1 , respectively Y 2 , parallel to each other and perpendicular to the son 4 and 4 'and the plane of the figure 1 .
  • An assembly 13, forming a comb and movable pivotally about an axis Y 3 parallel to the axes Y 1 and Y 2 comprises a leaf 131 and a comb 132 consisting of a row of teeth 132a mounted on the leaf 131 and driven by it rotates about the Y axis 3 .
  • the teeth 132a can thus be brought in abutment against the points P 1 and P 2 when the leaf 131 has been pivoted about the axis Y 3 , with respect to the position of the figure 1 by means not shown and known per se.
  • the assembly 13 is equipped with a series Si of lugs 133 distributed over substantially the entire length of the comb 132, that is to say, according to the width of the loom of the loom M, and integral with the comb 132.
  • the tabs 133 are mounted in groups of three consoles 134, each bracket being fixed on a metal section 135 which is itself fixed on the upper ends of the teeth 132a, that is to say say on the ends of these teeth furthest away from the Y axis 3 .
  • Each tab 133 is pierced with an orifice 133a comprising two extensions 133a 1 and 133a 2 of substantially complementary shapes of the upper and lower portions of the cross section of the strip 112, which makes it possible to obtain a guiding effect of the strip 112 which constitutes the flexible portion of the lance 11, according to the width of the upper, as the claw 111 progresses towards the side of the comb 132 opposite to that through which it enters the crowd.
  • each tab 136 is mounted on brackets 137 fixed to the leaf 131, each tab 136 having an orifice of which two extensions are complementary in shape to the upper and lower parts of the cross section of the ribbon 122. which effectively guides the 122, which is the flexible portion of the lance 12 engaged in the crowd F 2 , without interaction with the comb 132.
  • the strips 112 and 122 are each provided with openings 114, 124 respectively, intended to mesh with the teeth 211, respectively 221, of two toothed wheels 21, respectively 22, driven, by means not shown, about two axes A 21. and A 22 fixed relative to the frame 50 of the loom and inclined with respect to a median plane ⁇ 1 between the plies N 1 and N 2 of an angle ⁇ of the order of 75 °.
  • the axes A 21 and A 22 are merged, which is however not mandatory.
  • the ribbons 112 and 122 are guided by guides 31 and 32 shown only in broken lines at the figure 2 .
  • the front ends of the ribbons 112 and 122 are respectively marked 1121 and 1221, on which the claws 111 and 121 are mounted.
  • the ribbons 112 and 122 are flexible over most of their length which is provided with the openings 114 and 124, in order to to be able to wind on the wheels 21 and 22 without generating too much stress.
  • the tapes are made of a composite material.
  • the composite material is reinforced, without affecting its bulk, in order to increase the rigidity of these end portions of the strips 112 and 122.
  • the ends or end portions 1121 and 1221 do not have to deform since they do not come directly in contact with the wheels 21 and 22. These ends must, on the contrary, have a well-defined geometry allowing easy guidance by means of the tabs 133 and 136.
  • connection between the claw 111 and the ribbon 112 must be reliable and robust in order to respond to the stresses to which it is subjected.
  • the front end 1121 of the ribbon 112 is provided with a longitudinal slot 1122 which extends parallel to the longitudinal axis X 112 of the ribbon 112, this axis coinciding with the axis Y 1 for the portion of the ribbon 112 engaged in the tabs 133.
  • a reinforcement 113 of generally parallelepipedal shape is provided to be engaged in the slot 1122.
  • the reinforcement 113 is provided with two slots 1131 and 1132 in the form of slots each extending in a direction perpendicular to a longitudinal axis X 113 of the reinforcement 113, parallel to the greatest length of the reinforcement 113.
  • the reinforcement 113 is also provided with two holes 1133 and 1134 which connect two opposite faces 1135 and 1136 of the reinforcement 113 perpendicular to the face 1137 in which the housings 1131 and 1132 open.
  • 1124 and 1125 respectively denote the lateral faces of the ribbon 112 into which the openings 114 open.
  • the faces of the ribbon 112 perpendicular to the faces 1125 and 1124 are respectively noted 1126 and 1127.
  • the ribbon 112 is provided with two holes 1128 and 1129 which connect the faces 1126 and 1127 and which are respectively aligned with the holes 1133 and 1134 when the reinforcement 113 is in place in the slot 1122.
  • the bore 1128 comprises an upper portion 1128a and a lower portion 1128b. These portions 1128a and 1128b are respectively separated from the slot 1122 by flanges 1128c and 1128d each having a central opening.
  • Two screws 115 are provided to be inserted into holes 1128 and 1129 through portions 1128a and the like, while nuts 116 provided with threads 116a are received in portions 1128b.
  • the nuts 1116 are advantageously bonded in the portions 1128b, in which case they can be made in circular section rings. However, if the nuts are polygonal in section, as shown in figure 5 they are advantageously immobilized in the portions 1128b by cooperation of shapes, in addition to a possible bonding.
  • the claw 111 is represented, for the most part, by its silhouette with Figures 4 and 5 . It is provided with two lugs 1111 and 1112 intended to be respectively inserted in the housings 1131 and 1132. Each lug 1111 and 1112 is pierced with an orifice 1113, respectively 1114, through which one of the screws 115 passes.
  • the lugs 1111 and 1112 are integral with the rest of the claw 111 which is obtained by forming a metal sheet.
  • the mounting of the claw 111 on the ribbon 112 is performed by first making the slot 1122 and inserting the reinforcement 113 in this slot.
  • the reinforcement is then immobilized in this slot by gluing.
  • the reinforcement 113 protrudes laterally by relative to the faces 1125 and 1124 of the ribbon.
  • the end 1121 then has a generally cross-shaped section.
  • the reinforcement 113 is immobilized in the slot 1122 by means of screws which pass through orifices formed in one of the branches of the end 1121 between which is defined the slot 1122. These screws are accessible from the face 1126. They pass through the reinforcement 113 and are tightened in threads formed in the branch forming the face 1127. These screws are part of the bulk of the end 1121.
  • the claw 111 is attached to this reinforcement by inserting its lugs 1111 and 1112 into the housings 1131 and 1132.
  • the holes and bores 1113, 1133 and 1128 are respectively maligned on the one hand. , 1114, 1134 and 1129, on the other hand.
  • the nuts 116 can be rotatably mounted in the portions 1128b, in which case they are immobilized during the tightening of the screws 115.
  • the ribbon 112 is advantageously made from fibers. Reinforcing fibers, such as carbon fibers, are provided at the end 1121.
  • the reinforcement 113 can be made from the same fibers as the ribbon 112 or, in a particularly advantageous aspect, exclusively from fibers of carbon, which gives it a good rigidity and a good lightness.
  • the fibers of the elements 112 and 113 are advantageously molded in a synthetic matrix. Bonding between the elements 112 and 113 is all the more effective as their constituent materials are close to, or even identical.
  • each orifice 133a generally has a cross shape with, as previously explained, two extensions 133a 1 and 133a 2 of substantially complementary shapes of the upper and lower portions of the strip 112, in the vicinity of the faces 1126 and 1127.
  • Each orifice 133a also comprises a lateral extension 133a 3 and a slot 133a 4 which allow the reinforcement 113 to pass through.
  • each orifice 133a has a shape substantially complementary to the cross section of the end 1121 equipped with the reinforcement 113.
  • the claw 121 of the lance 12 is mounted on the end 1221 of the ribbon 122 by means of a reinforcement immobilized on this ribbon and comprising receiving receptacles for mounting tabs of the claw.
  • the orifices of the tabs 136 have substantially complementary shapes of the cross section of the front end of the ribbon 122 equipped with this reinforcement.
  • the lower portion of drilling 1133 of the reinforcement 113 is sufficiently wide so that the nut 116 bears directly against the lug 1111, the force E 1 being exerted directly on this lug by the nut 116 and on the reinforcement 113 through the flange 1128c by the head of the screw 115.
  • the deformations due to the tightening of the screw affect a very small area of the end 1121 and the reinforcement 113. They do not change the quality of the guide of the lance 11 by the legs 133.
  • the clamping force E 1 could be exerted by means of rivets in place of the screws 115.
  • the invention has been shown when used in a double-tablecloth loom. It is however applicable with simple tablecloths.
  • the claw or head of the lance is removable and can be replaced independently of the tape.
  • screws and tappings such as elements 115 and 116a or 116'a, are used, these elements are reusable.

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

Claims (15)

  1. Greifervorrichtung (11, 12) zum Eintragen von Schussfäden (51, 52) für eine Webmaschine (M), wobei die Greifervorrichtung ein flexibles Teil (112, 122) und eine Klaue (111, 121) zum Befestigen eines Schussfadens umfasst, die an einem Ende (1121, 1221) des flexiblen Teils befestigt ist, dadurch gekennzeichnet, dass das Ende (1121, 1221) des flexiblen Teils (112, 122) einen Längsspalt (1122) einschließt, in dem eine Verstärkung (113) festgelegt ist, wobei die Verstärkung mit mindestens einer Aufnahme (1131, 1132) zur Aufnahme eines Ansatzes (1111, 1112) zur Montage der Klaue (111, 121) versehen ist, und dass die Greifervorrichtung Mittel (115, 116; 116'a) zur Festlegung des oder jedes Ansatzes der Klaue in der entsprechenden Aufnahme einschließt.
  2. Greifervorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Mittel (115, 116; 116'a) zur Festlegung geeignet sind, eine Kraft (E1) zum Verklemmen des oder jedes Ansatzes (1111, 1112) in der korrespondierenden Aufnahme (1131, 1132) auszuüben.
  3. Greifervorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Mittel zur Festlegung mindestens eine Schraube (115) umfassen, die geeignet ist, mit einem Gewinde (116a; 116'a) zusammenzuarbeiten, das an dem Ende (1121, 1221) des flexiblen Teils (112, 122) montiert oder eingebracht ist.
  4. Greifervorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das Gewinde (116a) in einer Mutter (116) gebildet ist, die an dem Ende (1121, 1221) des flexiblen Teils (112, 122) aufgebracht ist.
  5. Greifervorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Mutter (116) hinsichtlich der Rotation in Bezug auf die Achse ihres Gewindes (116a) an dem Ende (1121, 1221) des flexiblen Teils festgelegt ist.
  6. Greifervorrichtung nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass die Mutter zu einem Bereich (1128d) des Endes (1121, 1221) des flexiblen Teils (112, 122) in Abstützung gegen die Verstärkung (113) gerichtet ist, wenn die Schraube (115) in dem Gewinde (116a) eingeschraubt ist.
  7. Greifervorrichtung nach einem der Ansprüche 4 oder Anspruch 5, dadurch gekennzeichnet, dass die Schraube (116) gegen eine Außenfläche (1136) der Verstärkung (113) an der Aufnahme (1131, 1132) gerichtet ist, wenn die Schraube (115) in das Gewinde (116a) eingeschraubt ist.
  8. Greifervorrichtung nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass die Mutter (116) gegen den Ansatz (1111, 1112) in Stellung in der Aufnahme (1131, 1132) gerichtet ist, wenn die Schraube (115) in das Gewinde (116a) eingeschraubt ist.
  9. Greifervorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das Gewinde (116'a) in einem Bereich (1128b) des Endes (1121, 1221) des flexiblen Teils (112, 122) realisiert ist.
  10. Greifervorrichtung nach einem beliebigen der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Mittel zur Festlegung mindestens einen Niet umfassen.
  11. Greifervorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Verstärkung (113) in Stellung in dem Spalt (1122) beidseitig des Endes (1121, 1221) des flexiblen Teils (112, 122) herausspringt.
  12. Vorrichtung zum Eintragen von Schussfäden für eine Webmaschine (M), mindestens eine Greifervorrichtung (11, 12) nach einem der vorhergehenden Ansprüche und einen Kamm (131) umfassend, der verteilt über seine Länge mit Mitteln (133, 136) zur Führung des flexiblen Teils (112, 122) jeder Greifervorrichtung ausgerüstet ist.
  13. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, dass die Mittel zur Führung eine Reihe von Ansätzen (133, 136) umfassen, die jeweils mit einer Öffnung (133a) für den Durchgang des flexiblen Teils (112, 122) versehen sind, wobei diese Öffnung im Wesentlichen komplementär zum Querschnitt des Endes (1121) des flexiblen Teils (112, 122) der Greifervorrichtung (11, 12) ist, der mit der Verstärkung (113) ausgerüstet ist.
  14. Webmaschine (M) ausgerüstet mit einer Greifervorrichtung (11, 12) nach einem der Ansprüche 1 bis 11 oder einer Vorrichtung zum Eintragen (11, 12, 21, 22, 31, 32) von Schussfäden nach einem der Ansprüche 12 oder 13.
  15. Verfahren zum Herstellen einer Greifervorrichtung (11, 12) zum Eintragen von Schussfäden (51, 52) für eine Webmaschine (M), wobei die Greifervorrichtung einen flexiblen Teil (112, 122) und eine Klaue (111, 121) zum Ankoppeln eines Schussfadens umfasst, die an einem Ende (1121, 1221) des flexiblen Teils befestigt ist, dadurch gekennzeichnet, dass es Schritte umfasst, die darin bestehen:
    a) - Einbringen eines Längsspaltes (1122) in das Ende des flexiblen Teils;
    b) - Instellungbringen einer Verstärkung (113) in den Spalt, die mit mindestens einer Aufnahme (1131, 1132) versehen ist;
    c) - Festlegen der Verstärkung (113) in dem Spalt (1122);
    d) - Einbringen in mindestens eine der Aufnahmen der Verstärkung einen Ansatz (1111, 1112) zur Montage der Klaue (111, 1129;
    e) - Festlegen des Ansatzes in einer Aufnahme durch eine Klemmkraft (E1).
EP20070356091 2006-07-07 2007-07-06 Greifer, sein Herstellungsverfahren, Vorrichtung zum Eintragen von Schussfäden, die mit einem solchen Greifer ausgestattet ist, und Webmaschine mit einer derartigen Vorrichtung Expired - Fee Related EP1876273B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0606210A FR2903425B1 (fr) 2006-07-07 2006-07-07 Lance,son procede de fabrication,dispositif d'insertion de fils de trame comprenant une telle lance et metier a tisser comprenant un tel dispositif

Publications (2)

Publication Number Publication Date
EP1876273A1 EP1876273A1 (de) 2008-01-09
EP1876273B1 true EP1876273B1 (de) 2009-06-24

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EP20070356091 Expired - Fee Related EP1876273B1 (de) 2006-07-07 2007-07-06 Greifer, sein Herstellungsverfahren, Vorrichtung zum Eintragen von Schussfäden, die mit einem solchen Greifer ausgestattet ist, und Webmaschine mit einer derartigen Vorrichtung

Country Status (4)

Country Link
EP (1) EP1876273B1 (de)
CN (1) CN101100782B (de)
DE (1) DE602007001363D1 (de)
FR (1) FR2903425B1 (de)

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CN102912533B (zh) * 2012-10-31 2013-09-18 常熟市常纺纺织机械有限公司 剑杆织机的引纬机构
CN102912532B (zh) * 2012-10-31 2014-03-26 常熟市常纺纺织机械有限公司 用于编织双层织物的剑杆织机的引纬机构
CN103306016B (zh) * 2013-05-07 2014-05-14 常熟市常纺纺织机械有限公司 用于编织双层织物的剑杆织机的引纬机构
CN103668717A (zh) * 2013-12-04 2014-03-26 杭州利宝纺织机械有限公司 一种挠性剑杆织机
BE1023978B1 (nl) * 2016-03-25 2017-09-28 Picanol N.V. Grijper voor een grijperweefmachine
CN106987963B (zh) * 2017-04-10 2019-01-18 湖州现代纺织机械有限公司 一种双层带孔面料及其织造方法
CN106868686B (zh) * 2017-04-10 2018-06-15 湖州现代纺织机械有限公司 一种用于织取双层透气面料的剑杆织机
CN106884254B (zh) * 2017-04-10 2018-07-03 湖州现代纺织机械有限公司 一种用于织取双层透气面料的织机结构
CN108728990B (zh) * 2018-08-13 2024-02-27 李红旗 一种剑杆机构及单剑杆展宽碳纤维织布机

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IT1228493B (it) * 1989-01-20 1991-06-19 Nuovo Pignone Spa Perfezionamenti nel sistema di ancoraggio del supporto pinze al nastro trasportatore in un telaio tessile.
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CN2066449U (zh) * 1990-04-26 1990-11-28 张松茂 新型织机用剑杆头
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Publication number Publication date
FR2903425A1 (fr) 2008-01-11
CN101100782A (zh) 2008-01-09
DE602007001363D1 (de) 2009-08-06
CN101100782B (zh) 2011-04-27
EP1876273A1 (de) 2008-01-09
FR2903425B1 (fr) 2008-08-29

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