EP1375715A1 - Procédé et métier à tisser double peluche pour la fabrication de tissu à poil à motifs - Google Patents

Procédé et métier à tisser double peluche pour la fabrication de tissu à poil à motifs Download PDF

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Publication number
EP1375715A1
EP1375715A1 EP02028336A EP02028336A EP1375715A1 EP 1375715 A1 EP1375715 A1 EP 1375715A1 EP 02028336 A EP02028336 A EP 02028336A EP 02028336 A EP02028336 A EP 02028336A EP 1375715 A1 EP1375715 A1 EP 1375715A1
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EP
European Patent Office
Prior art keywords
pile
weft
auxiliary
fabric
double
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.)
Granted
Application number
EP02028336A
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German (de)
English (en)
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EP1375715B1 (fr
Inventor
Rainer Dr. Gössl
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 GmbH
Original Assignee
Schoenherr Textilmaschinenbau GmbH
SCHONHERR TEXTILMASCHINENBAU GmbH
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Filing date
Publication date
Priority claimed from EP20020013888 external-priority patent/EP1375714B1/fr
Application filed by Schoenherr Textilmaschinenbau GmbH, SCHONHERR TEXTILMASCHINENBAU GmbH filed Critical Schoenherr Textilmaschinenbau GmbH
Priority to EP20020028336 priority Critical patent/EP1375715B1/fr
Publication of EP1375715A1 publication Critical patent/EP1375715A1/fr
Application granted granted Critical
Publication of EP1375715B1 publication Critical patent/EP1375715B1/fr
Anticipated expiration legal-status Critical
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/16—Double-plush looms, i.e. for weaving two pile fabrics face-to-face

Definitions

  • the invention relates to a method for producing patterned pile fabric on a double-pile weaving machine, with a double-pile fabric with two Gundgewebe connected by Florhenkel by separating the Florhenkel with a knife that can be moved parallel to the basic goods, an upper and a lower pile fabric is produced, which has pile loops and pile legs, the pile loops forming pile threads between a base weft and one guided by lancets at a distance from the respective base tissue Auxiliary shot are spanned, the auxiliary shots in an alley between the lancet groups assigned to the two basic tissues and removed after completion of the double pile fabric.
  • the invention also relates to a double pile weaving machine for the production of Double pile fabrics with areas of pile handles arranged according to the pattern and areas made of pole loops, with at least two that can be activated simultaneously weft insertion planes assigned to a web zone, with means for separating the Florhenkel between the two base fabrics of the double pile fabric and with at least one jacquard machine for pattern-based control of choir patterned pile threads per warp course.
  • a weaving method of this type is known from DE 199 18 171 A1.
  • two flat fabrics are produced, both of which serve as the base fabric of a pile or carpet fabric.
  • Both Basic fabrics are combined with each other by means of pile handles of different colors connected.
  • pile handles of different colors connected.
  • dead poles mostly stretched between the back and inner shots.
  • the jacquard machine can select these pile threads and either for binding as a dead pole on the base fabric or for the formation of pole handles in Connection with the opposite base fabric for subject formation move.
  • a so-called double pile fabric or double pile fabric is created.
  • By the pole handles are separated in the middle between the two basic goods two pile fabrics or carpets. Both pile fabrics have in the pile layer both pile areas and areas with exclusively closed pile loops on.
  • the pole loops formed in this way - called the wrong bouclé - extend usually only over a slightly thicker weft thread of the base fabric and therefore have only small dimensions. They are regularly significantly flatter than the pile legs in the pile areas. This fake bouclé is called also as a pattern on the bottom.
  • Adjacent pile handles are spread out in the warp direction. They form in Weft direction a cord-like pile surface. It is unsatisfactory. It can not pile fabric with reasonable kick properties and more uniform Pole height are generated. The pile loops and pile legs cannot roughly a uniform plane can be positioned anywhere on the pole surface.
  • EP 1 081 260 A1 is used for the production of a pile fabric Pole loops and pile legs use a kind of rod weaving machine proposed.
  • the single-action rod weaving machine carries in everyone third tour on the pole side a thicker shot, over the per warp course a selected pile thread forms a larger loop.
  • a cutting rod pole form element
  • These larger ones formed Pole loops are separated and formed when the cutting rod is pulled out upright pile legs anchored in the base fabric. These pile legs are significantly longer than the pole loops formed on the goods base.
  • a major disadvantage is that the pole loops spread Spread the pile legs in the pile row with thick weft threads so that the Pile areas in the weft direction get a rib or cord structure.
  • the rod weaving machine works one-tier and requires for incorporating a number of Pile loops or pile loops a total of three weaving machine tours. Because of the large mass of the cutting rod to be entered in a tour can Only operate the loom at low speed.
  • Another element that limits the working speed of the weaving machine is the cutting rod during its cutting function. Warm the cutting rods during the cutting process such that when a Melt the ends of the pile legs at a certain temperature. That affects the quality of the pile fabric produced. For this reason, one is a further reduction in the working speed of the weaving machine is usually unavoidable.
  • the height of the pole loops can also be determined using the method mentioned here do not adjust to the greater height of the pile legs if pile loops and The pile legs are positioned side by side in the weft direction.
  • the cross-section of the rod determines the height difference between the pile leg and Pile loops.
  • the walking comfort can only be ensured if the surface areas of the carpet with pole loops are very small. If the pole loop structure is to prevail, then the pile heights are to be reduced by a shear process. The low and hard pole loops then determine the pedaling comfort at a low level.
  • the lancet groups arranged in one plane are articulated Guide boards equipped that can be involved in technical training. These controllable guide boards ensure that the auxiliary shots alternately to spread the respective pile loops the pile fabric be assigned to the upper fabric or the pile fabric of the lower fabric. After the weaving process is finished, both pile fabrics come off without Cutting process from each other.
  • auxiliary weft threads can remain in the tissue while supporting the pole loops. But you can also look sideways the pile fabric can be removed so that the pile loops themselves are comfortable to walk on determine.
  • the pile legs and the pile loops are arbitrary on the pile surface can be arranged according to the pattern without the separation process of the pile handles of the Double pile fabric is hindered in some way. It is excluded, that the means for spreading the pile loops also spread the pile legs.
  • the size of the pole loops is due to the choice of the dimensions of the lancets can be varied within the usual limits. For securing the almost uniform
  • the height of the pile legs and the pile loops are in addition to the usual, balancing ones Shearing processes no additional operations required. It will Using the double pile weaving process, two of the same and high quality at the same time Pile fabric is produced, thus ensuring a high output of the weaving machine.
  • the method can be modified using conventional double carpet or Double pile weaving machines with a lancet arrangement without limitation of the usual working speed can be realized.
  • the implementation of the procedure with single-shot entry is in principle possible but for economic reasons (would be for a pile bond repeat at least four tours required) regularly not desired.
  • the described In principle, the method also enables the combination with a sample Pile thread pattern on the base fabric and / or with a weft pattern.
  • the advantage of the method according to claim 14 is in addition to the high Productivity above all in additional design options for pile fabrics. So this modification also allows the production of patterns on the bottom (wrong Bouclé or shot pattern) in larger areas. Possibly. provided auxiliary shot slings and / or warp threads binding auxiliary shots alone be arranged on the bottom using pole loops. Do these auxiliary shot slings pass made of water-soluble fibers or very thin filaments at least in a subsequent, easily realizable work step the visible side through water or by means of controlled flames (scorching) be eliminated.
  • the double pile weaving machines according to claims 15 to 18 are special Suitable for carrying out the method according to the invention.
  • the arrangement of the strip trigger device according to claim 19 is suitable especially when larger pile loop-free areas are provided in a pile fabric and if large pole loops are part of the pattern.
  • the embodiment according to claim 20 in particular offers greater reliability in pile fabrics with a relatively low pile loop height.
  • the basic principle of the present invention should first be based on the example of a three-guard double pile weaving machine according to FIG. 1 are explained.
  • the three-armed Double-pile loom is equipped with shedding devices, the threads individually or in groups in a manner known per se in four can distribute superimposed levels.
  • the upper compartment level O and the upper middle compartment level Ma are in terms of Binding warp threads 223a and the filling chain 224a the upper base fabric 22a assigned.
  • the lower subject level or sub-subject U and the lower middle subject level Mb are with regard to the binding warp threads 223b and the filling chain 224 assigned to the lower base fabric 22b.
  • the patterned pile threads alternate between the upper compartment O and the lower compartment U, if they form pile handles 226. Shall the pattern poles loop loops 225a, 225b, they change regularly between an outer compartment O or U and the respective middle level Mb or Ma.
  • the back wefts 221a and the inner wefts are in the weft insertion plane 15 222a of the upper basic goods 22a entered.
  • the weft threads - namely the back shots 221b and inner shots 222b of the lower base fabric 22b - are entered through the weft insertion level 17.
  • each basic product 22a, 22b several non-patterning pile threads - so-called dead poles - as dead pole strand TPa and TPb be involved.
  • the pile threads of these dead pole strands TPa and TPb can are exchanged in the usual way for each of the patterning pile threads.
  • the middle weft insertion plane 16 is flanked by the top and bottom Lancet groups 14a, 14b.
  • the lancet groups 14a, 14b are part of the lancet unit 14 mounted on the frame. Grip around the guide sections 145 the path of the weft insertion means 16, which are usually designed as gripper bars are.
  • the lancet groups 14a, 14b keep an alley 140 clear, which extends into the finished double pile fabric 2 extends.
  • the middle weft insertion level 16 thin auxiliary weft threads 231a and 231b are inserted which refer to the Support the inner edges of the lancets 14a, 14b and the pole loops 225a, 225b Form in the area of the tissue stop plane or edge A.
  • auxiliary weft threads are on both sides of the double pile fabric 2 in the plane of the alley 140 together with the last warp threads 232, 232 '; 232a, 232a '; 232b, 232b 'in strips 23, 23'; 23a, 23a '; 23b, 23b 'involved.
  • auxiliary shot holding slings 225c are available in a reasonable manner To fix the distance below the upper base product 22a.
  • auxiliary shot slings 225c as well as patterning pole loops 225a, 225b bound. However, they consist of a very thin and / or in terms of Color and structure of neutral thread.
  • auxiliary weft threads 231a can be dispensed with, especially for that Guide the auxiliary weft threads 231a to provide warp threads 229 or 228 that are exclusive tie with or between auxiliary weft threads (Fig. 9 or Fig. 10).
  • the warp threads 229 are only with upper auxiliary weft threads bound.
  • the warp threads 229 of a group can be made up of several Warp courses are distributed. This way you can save material and that It is easier to pull out the auxiliary weft threads 231. On the other hand, it is enough sufficiently tensioned auxiliary weft threads 231 when a support is on a section of one or more centimeters is done only once.
  • the warp threads 228 are individually between the upper and lower auxiliary shots 231a and 231b. In front of the area of the knife 41, these warp threads 228 are guided upwards over the guide means 33a Area of the knife 41 out.
  • the auxiliary shots 231a (also 231b) slide over wire-shaped bars 331 also from the area of the knife 41 without hinder the cutting process.
  • the last warp threads 232 become a shed formation with the help of special groin stems LSa, LSb; LSa 'LSb' (see Fig. 11) with a specialist representative 2321, 2321 ', 2321 "(Fig. 1, 3, 5).
  • auxiliary weft threads 231a, 231b which are subsequently removed from the pole loops 225a, 225b, 225c the base fabric 22a, 22b pulls out again, preferably of thin synthetic material.
  • Fig. 2 shows an example of a fabric that is on a three-protection double pile weaving machine 1 was produced.
  • each tour there is one Base shot 221a, 222a and 221b, 222b of the upper and lower goods and an auxiliary shot 231a, 231b entered.
  • the basic shots 221a, 222a and 221b, 222b are in one tour in a base fabric 22a, 22b once as a back weft 221a or 221b and in the other base fabric 22b, 22a integrated as an inner weft 222b, 222a.
  • the auxiliary weft 231b, 231a of a base fabric is always simultaneously with one Inner weft 222b, 222a of the same basic fabric 22b, 22a entered.
  • the auxiliary shot holding slings 225c do not need in every warp course and in every tour. Depending on the division in the weft direction Such auxiliary shot holding slings 225c can only be used in every third or even only plan in every tenth warp course. It is possible in successive Weft insertion cycles per basic product these auxiliary weft holding slings 225c in different warp courses, so that a streaky effect if necessary can be avoided and all auxiliary weft threads 231a away from the knife 41 being held.
  • the separation of the two basic goods 22a, 22b by the knife 41 of the knife carriage 4 takes place in the area between the tops of the relaxed pole loops 225a, 225b of the upper and lower base fabrics 22a, 22b.
  • the Knife 41 separates the tavern! the pile handle 226 according to FIG. 2a and forms Pile leg 2261 according to FIG. 2b, which, for. B. according to the pattern between the The apices of the pole loops 225b are positioned in FIG. 2c.
  • To secure a sufficient distance of the auxiliary shots 231a from the knife 41 Last raised by means of guide means 33.
  • the lower auxiliary shots 231b lower due to their gravity. You can do this also support by guide means 33 and 33b.
  • the leadership of the binding chain 223 in the training can be more common and proven Shape. It is important that over a certain section in the direction of the shot all basic shots 221 ... and 222 ... sufficient at the respective Basic goods 22a, 22b are held and the pile handles 226 and the pile loops 225a, 225b are aligned with weft threads in such a way that they essentially protrude perpendicularly from the respective basic goods 22a, 22b.
  • the type of basic bond is essentially freely selectable.
  • FIG. 3 shows a weaving unit with two weft insertion levels 11, 12. That of the gripper bars in the weft insertion plane 11 and the weft insertion plane 12 registered shots are countered with the help of the sley 13 the fabric stop edge A.
  • the warp threads are in the usual manner in the upper compartment level O ', in the lower compartment level U 'and positioned in a middle compartment level M.
  • the two weft insertion levels 11, 12 alternately stand for the Entry of a base shot 221a ', 222a' or 222b ', 221b' into a first base fabric and for the insertion of an auxiliary shot 231b, 231a for the opposite one Base fabric available. That is, it becomes a basic shot 222b ', 221b' e.g. B. entered in the lower basic product 22b ', then receives the upper base article 22a 'its auxiliary shot 231a' and can loop loops 225a ' form. In contrast, the upper base fabric 22a 'receives a base shot 221a ', 222a' then the auxiliary shot 231b is assigned to the lower base product 22b '.
  • the upper and lower weft insertion levels 11, 12 are therefore to assign a respective weft changing device (not shown).
  • the lancet groups 14a ', 14b' each have guide boards 141, 142 are assigned to either the shot of the top Weft insertion plane 11 or through the lower weft insertion plane 12 registered auxiliary weft thread 231a, 231b by means of representative 1411 or specialist representative 1421 into the alley 140 between the lancet groups 14a 'and 14b' to lead.
  • the last warp threads 232a, 232b lead a specialist representative 2321 'or 2321 "in this way from that they each together with the auxiliary shots 231a, the upper Basic fabrics 22a are assigned or together with the auxiliary wefts 231b, which are assigned to the lower base fabric 22b, a strip 23a or 23b form.
  • the double pile fabric 2 ′ resulting from this mode of operation is shown in FIG. 4 shown.
  • a double pile weaving machine with four weft insertion levels one above the other 15, 16, 161, 17 for carrying out the method according to the invention 5 shows the warp threads in such a double pile weaving machine due to the well-known subject elements on five subject levels O ", U", Ma “, Mb "and Z distributed.
  • auxiliary weft threads 231a and 231b ensures the middle ones Weft insertion levels 16, 161.
  • traction means 1410 and 1420 see. Fig. 3
  • the existing weft insertion levels 15, 16, 161, 17 ensure that in each tour a back shot 221a "and 221a” 'for tying pile handles 226 "and / or pole loops 225a", 225b "is available. It is possible to be symmetrical Binding with high pile density in the pile area and also in the pile loop area to design.
  • the manner of this process is described below with reference to FIG. 8 for the lower pile fabric 2b described.
  • the double pile fabric 2, 2 ', 2 "- hereinafter only referred to as double pile fabric 2 - is initially horizontal up to the take-off rollers 31 and 32 are filled with needles.
  • Pressure rollers 321, 321 ' can the strips 23b, 23b 'on the collar 320 non-positively. With one of these pressure rollers 321 '
  • a separating knife 5 can be connected to separate the auxiliary weft threads 231 from the Strip 23b 'separates.
  • the knife carriage 4 is - as is usual with double-pile weaving machines - in one certain arrangement to the two take-off rollers 31, 32 guided and moved moving parallel to them at high speed in changing directions Draw-off rollers 31, 32.
  • This conventional unit does not require any special description.
  • the strips 23b, 23b 'and the auxiliary shots 321 are removed by means of Last deduction 6 - right - and with last auxiliary firing deduction 7 - left.
  • the bar 23b (left), on which the auxiliary weft threads 231b remain, is by means of Last pull-off rollers 71 pulled away laterally from the pile fabric 2b.
  • the auxiliary weft threads 231b follow them to the same extent.
  • FIG Fig. 7 Another variant of the tension of the auxiliary weft threads 231a and 231b is shown in FIG Fig. 7 shown.
  • the auxiliary weft threads 231a and 231b bind with last warp threads 232 together a bar. This procedure can be implemented if the auxiliary weft threads 231a, 231b before reaching the trajectory of the knife 41 can already be removed from the double pile fabric 2.
  • FIG. This process is u. a. shown schematically in FIG. This figure shows one Top view of the web arrangement.
  • the middle section is all for manufacturing of the double pile fabric necessary warp threads, namely the binding warp threads 224, the fill warp threads 224, the dead poles TPa of the upper base fabric 22a, the dead poles TPb of the lower base fabric 22b and also the warp threads 228 fed.
  • These warp threads are grouped in the usual way by means of shafts SM or individually by means of strands of a jacquard machine JM a controlled Subject subject that leads to the production of the double pile fabric 2.
  • the lancet groups 14a, 14b are also arranged in this central region.
  • auxiliary warp threads 232, 232a, 232, or 232 ', 232a', 232b ' Shed formation facilities arranged this auxiliary warp threads in the can move as necessary. This is what special "strip machines" can do, special lasts LS, LS 'or LSa, LSb or LSa' LSB 'or can also be individual strands moved by the JM jacquard machine.
EP20020028336 2002-06-24 2002-12-17 Procédé et métier à tisser double peluche pour la fabrication de tissu à poil à motifs Expired - Lifetime EP1375715B1 (fr)

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Application Number Priority Date Filing Date Title
EP20020028336 EP1375715B1 (fr) 2002-06-24 2002-12-17 Procédé et métier à tisser double peluche pour la fabrication de tissu à poil à motifs

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP20020013888 EP1375714B1 (fr) 2002-06-24 2002-06-24 Procédé de fabrication d'un tissu à poils
EP02013888 2002-06-24
EP20020028336 EP1375715B1 (fr) 2002-06-24 2002-12-17 Procédé et métier à tisser double peluche pour la fabrication de tissu à poil à motifs

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EP1375715B1 EP1375715B1 (fr) 2006-03-22

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2866032A1 (fr) * 2004-02-09 2005-08-12 Ltaief Bouaziz Dispositif pour machine textile et de tissage de guidage de lances et projectiles d'insertion et utilisation
EP1568809A1 (fr) * 2004-02-25 2005-08-31 NV Michel van de Wiele Métier à tisser et procédé pour tisser des tissus à bouclettes et espaceur pour tel métier à tisser
BE1015918A5 (nl) * 2004-02-25 2005-11-08 Wiele Michel Van De Nv Weefmachine en werkwijze voor het weven van poolweefsels bestaande uit inslaggarens grondkettinggarens en poolkettinggarens.
US7451786B2 (en) 2006-11-17 2008-11-18 N.V. Michel Van De Wiele Weaving machine for weaving pile fabrics, and set of at least two spacers provided to be mounted next to one another in a weaving machine for weaving pile fabrics
US7644737B2 (en) 2005-09-02 2010-01-12 Textilma Ag Method for production of a velvet ribbon with double-sided nap and ribbon weaving machine for carrying out said method
BE1017988A3 (nl) * 2008-02-08 2010-03-02 Wiele Michel Van De Nv Werkwijze en inrichting voor het weven van poolweefsels met lussenpool en gesneden pool.
EP2175057A1 (fr) * 2008-10-09 2010-04-14 SCHÖNHERR Textilmaschinenbau GmbH Dispositif et procédé d'extraction de fils de trame auxiliaires et métier à tisser équipé d'un tel dispositif

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR669122A (fr) * 1928-06-02 1929-11-12 Vanoutryve Et Cie F Perfectionnements aux métiers pour le tissage des moquettes et velours ciselés
US3204669A (en) * 1963-07-03 1965-09-07 Morgan Valentine Co Inc L Manufacture of cut pile fabrics
US3289706A (en) * 1965-06-10 1966-12-06 Morgan Valentine Company L Means for the manufacture of cut pile fabrics
DE3737999A1 (de) * 1986-12-01 1988-06-16 Textima Veb K Verfahren und vorrichtung zur herstellung von schlingenpol-doppelgeweben
DE4312235A1 (de) * 1993-04-15 1994-10-20 Chemnitzer Webmasch Gmbh Verfahren und Vorrichtung zum Weben von Schlingenpolgeweben auf einer Webmaschine
EP0627511A1 (fr) * 1993-04-23 1994-12-07 N.V. Michel Van de Wiele Machine jacquard

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR669122A (fr) * 1928-06-02 1929-11-12 Vanoutryve Et Cie F Perfectionnements aux métiers pour le tissage des moquettes et velours ciselés
US3204669A (en) * 1963-07-03 1965-09-07 Morgan Valentine Co Inc L Manufacture of cut pile fabrics
US3289706A (en) * 1965-06-10 1966-12-06 Morgan Valentine Company L Means for the manufacture of cut pile fabrics
DE3737999A1 (de) * 1986-12-01 1988-06-16 Textima Veb K Verfahren und vorrichtung zur herstellung von schlingenpol-doppelgeweben
DE4312235A1 (de) * 1993-04-15 1994-10-20 Chemnitzer Webmasch Gmbh Verfahren und Vorrichtung zum Weben von Schlingenpolgeweben auf einer Webmaschine
EP0627511A1 (fr) * 1993-04-23 1994-12-07 N.V. Michel Van de Wiele Machine jacquard

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2866032A1 (fr) * 2004-02-09 2005-08-12 Ltaief Bouaziz Dispositif pour machine textile et de tissage de guidage de lances et projectiles d'insertion et utilisation
EP1568809A1 (fr) * 2004-02-25 2005-08-31 NV Michel van de Wiele Métier à tisser et procédé pour tisser des tissus à bouclettes et espaceur pour tel métier à tisser
BE1015918A5 (nl) * 2004-02-25 2005-11-08 Wiele Michel Van De Nv Weefmachine en werkwijze voor het weven van poolweefsels bestaande uit inslaggarens grondkettinggarens en poolkettinggarens.
US7111647B2 (en) 2004-02-25 2006-09-26 N.V. Michel Van De Wiele Weaving machine and method for weaving pile fabrics and spacer for such a weaving machine
US7644737B2 (en) 2005-09-02 2010-01-12 Textilma Ag Method for production of a velvet ribbon with double-sided nap and ribbon weaving machine for carrying out said method
US7451786B2 (en) 2006-11-17 2008-11-18 N.V. Michel Van De Wiele Weaving machine for weaving pile fabrics, and set of at least two spacers provided to be mounted next to one another in a weaving machine for weaving pile fabrics
BE1017988A3 (nl) * 2008-02-08 2010-03-02 Wiele Michel Van De Nv Werkwijze en inrichting voor het weven van poolweefsels met lussenpool en gesneden pool.
EP2175057A1 (fr) * 2008-10-09 2010-04-14 SCHÖNHERR Textilmaschinenbau GmbH Dispositif et procédé d'extraction de fils de trame auxiliaires et métier à tisser équipé d'un tel dispositif

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