EP1217114B1 - Method of manufacturing a face to face pile fabric - Google Patents

Description

The invention relates to a method for producing a Doppelpolgewebes on a Doppelpolwebmaschine with at least two weft insertion levels, using weft yarns, Füllkettfäden and binding warp threads for the formation of the base goods of lower and upper goods and at least two pile threads per warp course for the formation of the pole layer between the two basic goods, wherein tensioned Füllkettfäden and not mustering pile threads in both basic goods, the upper and / or lower fabric, largely stretched, between inner and back shots are involved and the Polhen each pile forming pile threads in successive tours in pairs, symmetrically to each other between weft yarns of the upper fabric and the Underware be spanned.

Such a method is known inter alia from EP 0 119 184 A1.
On a Doppelteppichwebmaschine with two weft insertion levels shot pairs are entered in an immediately changing sequence. In a first tour, a weft in the upper fabric and a back weft in the lower fabric and in the following tour a back weft in the upper fabric and an inner weft in the lower fabric registered. The back shots and the inner shots of each product are separated by a taut filling chain and by predominantly stretched, not mustering pile threads (also called Totpole).

In each tour two eye-catching pile threads tie simultaneously and symmetrically to each other. One pile thread is stretched over one back and the other over the simultaneously inscribed inner weft.
The inner and back shots of each product, which were registered in the successive tours are included in pairs in the openings formed by binding warp threads and so bound to the stretched Füllkettfäden and / or to the dead poles.
The pole loops spanned over the backshots are guided on all sides and step out of the basic fabric - slightly inclined to the vertical. The pole loops binding over the inner shots are much less laterally supported and less firmly anchored by the bond. The binding site of these pole handles can not be achieved by fixing fluids (eg LATEX). This leads to irregular pattern contours and faster wear of the pile layer with regular care with vacuum cleaners. This method has therefore not been able to prevail.

A similar procedure is described in DD 256 239 A3. Here, too, the back and inner shots of each product are separated by a tight filling chain and by Totpole stretched tied. However, the weft threads are tied off here by individual binding warp threads in each product. With a plain weave, they alternately engage a back shot outside and then an inside shot inside. An improvement in the quality of the product, however, is achieved in comparison to the method described above only to the extent that the pole pieces which bind over the back portion protrude almost perpendicularly from their base fabric. The pole handles that bind via inner shots cause the same defects as they were described by.

By the BE 382 401 a double pile fabric is known in which double pile fabric symmetrically opposite pole loops are always tied to back shots and only every other back shot per product is assigned an inner weft. This lot is produced in Einschusstechnik. For the production of a symmetrical pole pair 6 weaving machine tours are required. Productivity is low. The back shots are woven through a binding warp pair exclusively in plain weave, while the inner shots bind through additional binding chains alternately with every second back shot. Such basic goods are qualitatively unsatisfactory because they are highly flexible and therefore not suitable for carpets.
The non-patterning pile threads are loosely laid along the back of one of the basic fabrics. They are scraped off after separating the pole legs between upper and lower fabric. As a result, pole edges in the tissue are missing in the region of the pole changing points. The fabric is of low quality and does not meet today's usual demands on carpet fabric. The pattern contours are unclear and the integration of the pole handles is irregular and unstable. These tissues have been part of a different, non-manufactured genus of double-winged fabrics for several decades.

The object of the invention is to propose a highly productive method of the type described, which makes it possible that each pole leg can be stably held in its basic product and its legs protrude almost perpendicularly from the same. The pattern contours should be clearly designed and retain their quality even with prolonged use.

According to the invention the object is achieved by the combination of the features of claim 1.
The presence of back shots in almost every tour creates the Prerequisites that in each row of poles of each product all Polhenkel can be spanned on back shots. The regular arrangement of inner shots, which are held by the binding chain preferably symmetrically loaded on the base fabric, ensures that the pole loops of a group are sufficiently erected and supported. You can recover quickly and reliably after a load.

The decisive advantage, however, is that in almost every weaving machine tour, in each of the goods - the top fabric and the lower fabric - a complete row of poles can be produced in high quality. The pattern borders can be made clean and correct. With the usual techniques for pile yarn change, mixing contour-free pattern boundaries can be produced. The productivity of the web process is very high. It can hardly be beaten by textile technology measures.

If one chooses different colors of the symmetrically patterned pile threads, one can create mixed colors. The color palette expands to a considerable extent. Tests have shown that the strip effect occurring in the prior art in such mixed colors no longer occurs in the method according to claim 1. The different colored pole legs arrange themselves in a small, checkered pattern. Even from a short distance only a single "mixed color" can be seen.

Claim 2 shows a modification of the method, which is preferably realized on double carpet looms with two weft insertion levels with high productivity.

The variant according to claim 3 is suitable for looms with three weft insertion levels. This eliminates the additional tours of the loom, in which inner shots must be entered.

The claim 4 defines a plain weave, with a uniform distribution of back shots is guaranteed in the basic product.

Claim 5 preferably modifies the method according to claim 2. The pole legs are held securely in the vertical position here.

If, according to claim 6, additional pole loops are also clamped over the inner shots, then high productivity and / or further variability of the pole colors or pole characteristic can also be achieved on pole looms with only two weft insertion planes.

The arrangement of the inner shots between the legs of Polhenkels according to claim 7 can be realized with particular advantages on weaving machines with three weft insertion levels, but also on zweischützigen looms. It is also recommended when the number of back shots of a group between two inner shots numerically in the lower area, d. H. is located between two and five back shots.

In both cases (claim 5 and 7) can be between the bonds that include inner shots, single or double bindings of Rükkenschüssen so arranged that the two binder warp threads can be integrated within a Gesamtrapportes with the same length. The arrangement of additional warp beams is avoided.

With the modification of the method according to claim 8, a special type of pile yarn shim is proposed. These special measures are required here because the pile threads that do not form a pile - the dead poles - are then regularly located in the middle compartment if they have to be selected for the purpose of patterning. There is at conventional Jacquard machines in the necessary movement phase usually given no choice.

The double carpet weaving machine according to claim 9 proposes the use of a z. No. 5,862,836, which has the designated essential working elements. Thus, the method of claim 8 can be practically realized today.

Claim 10 brings a cost savings in terms of the cost of the jacquard machine.

Independent claim 11 defines a way of solving the problem by means of a double carpet weaving machine having four weft insertion planes.

Fig. 1

ein bevorzugtes Ausführungsbeispiel eines nach dem Verfahren auf einer zweischützigen Doppelteppichwebmaschine hergestellten Doppelteppichgewebes,

Fig. 2

eine zweite Variante für ein zweischütziges Webverfahren mit zwischen zwei einander benachbarten Polhenkein angeordnetem Innenschuss,

Fig. 3

eine dritte Variante eines Doppelteppichgewebes mit zwischen den Schenkeln eines Polhenkels angeordneten Innenschüssen,

Fig. 4

ein Doppelteppichgewebe, das auf einer dreischützigen Webmaschine hergestellt ist mit gruppenweise eingebundenen Innen- und Rückenschüssen,

Fig. 5

eine Variante zu Fig. 4 mit unregelmäßig gesteuerter zweifädiger Bindekette,

Fig. 6

eine Variante zu Fig. 4, bei der Innenschüsse in größeren Abständen eingetragen sind,

Fig. 7

ein Beispiel für ein Doppelteppichgewebe mit mustergemäß wechselnd eingebundenen Polfäden,

Fig. 8

ein Doppelteppichgewebe mit einer besonderen Steuerung der Bindekette nach dem Prinzip von Fig. 1,

Fig. 9 bis 12

unterschiedliche Varianten der Bindekettensteuerung bei Anordnung der Innenschüsse zwischen einander benachbarten Polhenkeln,

Fig. 13 und 14

zwei Varianten der Steuerung von Bindekettfäden bei wechselnder Anordnung der Innenschüsse zwischen zwei Polhenkein und der Anordnung derselben zwischen den Schenkeln eines Polhenkels,

Fig. 15 und 16

je ein Fachbildungsdiagramm für die Anwendung des Verfahrens auf zweischützigen Doppelteppichwebmaschinen, wobei in Fig. 16 der Polfadenwechsel mit angegeben ist,

Fig. 17 und 18

je ein Fachbildungsdiagramm analog zu den Fig. 15 und 16 für eine Webmaschine mit drei Schusseintragsebenen,

Fig. 19

das Schema der Jacquardsteuerung für die musternden Polfäden nach dem erfindungsgemäßen Verfahren,

Fig. 20

ein Doppelteppichgewebe mit paarweise, symmetrisch über Rückensch üsse bindenden Polfäden sowie mit zusätzlichen Polfäden die ausschließlich über die Innenschüsse binden,

Fig. 21

ein Doppelteppichgewebe bei dem symmetrisch musternde Polfäden mit einfach musternden Polfäden wechseln und

Fig. 22

ein Doppelteppichgewebe, das auf einer Doppelteppichwebmaschine mit vier Schusseintragsebenen herstellbar ist.

The invention will be explained in more detail with reference to embodiments. In the accompanying drawings show:

Fig. 1

A preferred embodiment of a double carpet fabric produced by the method on a double-felted double-sided weaving machine,

Fig. 2

a second variant of a two-way weaving method with an inner weft arranged between two mutually adjacent pins,

Fig. 3

a third variant of a double carpet fabric with inner shots disposed between the legs of a pole handle,

Fig. 4

a double carpet fabric, which is manufactured on a dreischützigen weaving machine with groupwise integrated inside and back shots,

Fig. 5

a variant of FIG. 4 with irregularly controlled bifid binding chain,

Fig. 6

a variant of FIG. 4, in which inner shots are registered at greater intervals,

Fig. 7

an example of a doubled carpet with patterned alternating pile threads,

Fig. 8

a double carpet fabric with a special control of the binding chain according to the principle of Fig. 1,

Fig. 9 to 12

different variants of the binding chain control in the arrangement of the inner shots between adjacent pole loops,

FIGS. 13 and 14

two variants of the control of binding warp threads with alternating arrangement of the inner shots between two Polhenkein and the arrangement of the same between the legs of a Polhenkels,

FIGS. 15 and 16

in each case a shedding diagram for the application of the method to double-sided double-disc weaving machines, the pile thread change being indicated in FIG. 16,

FIGS. 17 and 18

each a shedding diagram analogous to FIGS. 15 and 16 for a weaving machine with three weft insertion planes,

Fig. 19

the scheme of jacquard control for the patterning pile threads according to the method of the invention,

Fig. 20

a double carpet fabric with pairs of pile threads that bind symmetrically over dorsal joints and with additional pile threads that bind exclusively via the inner shots,

Fig. 21

change a double carpet fabric in the symmetrical mustering pile threads with simple mustering pile threads and

Fig. 22

a double carpet fabric that can be produced on a double carpet weaving machine with four weft insertion levels.

The double carpet fabric shown in Fig. 1 is separated after the weaving process by a corresponding cutting device in the central region of the pole layer. The result is a top fabric OW and a lower fabric UW. The upper fabric OW and the lower fabric UW are identical in their structure. Their patterns are mirrored to each other.
Each of these goods OW, UW has a tensioned filling chain F, which clearly separates the back shots SR from the inner shots SI. The inner and back shots SI, SR are held on the filling chain F with the aid of a two-strand binding chain B1. Between the inner shots SI and the filling chain F, so-called dead poles PT can additionally be permanently or temporarily integrated. Totpolen PT refers to pile threads that are currently not involved in the patterning, ie at the pile weave.

The back shots SR of the upper fabric OW and the lower fabric UW facing each other; are entered simultaneously within a first tour. This way of working is repeated here within three consecutive machine tours. In the next tour, ie after the entry of the back shots SR of a group SRG, the filling chains F and the totepole of both goods are brought into the respective outer compartments. Only one of the binding warps B1 of each of the goods remains in the middle compartment M. In this phase, the two inner shots SI1 are entered. After this binding of the inner shots SI has ended, the filling chains F and Totpole PT return to their central compartment. Again, three pairs of back shots SR are registered before the next pair of shots SI is introduced.

Over all back shots SR pairs of patterned pile threads PM, PM1, PM2 and PM4 are guided and form Polhenkel PH. These pole loops of both goods are separated in a conventional manner after the weaving process by a cutting process. There are two carpets.
The pole handles PH are firmly anchored in a product thus produced by the back shots SR. They are patterned. Their binding site can be reached from the back for liquid, fixing agents (eg LATEX). Supported by their binding, the legs of the pole handles PH stand out almost perpendicularly from the base product.

The resulting pile fabric can be produced with extremely different densities. The pole face has very good treading properties. The recovery ability under partial load is very good. The pattern contours of such a pile fabric are very clear and will not be irregular even after prolonged exposure.

The pile threads P can switch in a conventional manner against each other. The respectively newly patterned pile yarn PM, coming from the Totpolstrang PT, binds for the first time together with the previously poling pile yarn PM over the backshot SR of the own goods. Subsequently, the previously patterned pile yarn PM changes over a short distance into the Totpolstrang PT his goods. The pattern poles PM1, PM2 and PM4 here form the patterned pole face and change in the described form against each other.

In Fig. 1, the term back shot group SRG is introduced for the first time. This group SRG comprises in each case the back shots SR, which are entered before an inside shot SI is introduced into both goods within a repeat. The inner shots SI need not necessarily be introduced in a tour at the same time.

Fig. 2 shows an example of a double carpet fabric in which the back weft group SRG2 consists of four back shots SR. Between two consecutive back-shot groups SRG2 a pair of inside shots SI is entered. Over these inner shots SI tie in a conventional manner also patterning pile threads and form Polhenkel PHI. The two-fold binding chain B2 encloses the back shots SR of the two goods OW, UW in mutually changing directions.

The inner shots SI are included here in the same way in this bond. They each support a group of pole pieces PH, which were clamped within a back-shots group SRG2, in the warp direction. The pole limbs PHI, which are spanned by the inner shots, are only supported by the legs of the pole limb PH which are not exactly guided in this plane. It is therefore possible that the pattern contours appear somewhat irregular in these areas.

The embodiment of FIG. 3 shows an integration of the inner shots SI, in which the inner joints SI are guided between the legs of a Polhenkels PH. The two-fold binding chain B3 includes asymmetrically in the binding region of the inner shank SI two back shots SR and an inner shank SI in an opening of the binding chain B3. The spine group SRG3 here comprises four back weft threads SR.

The form of a double carpet fabric illustrated in FIG. 4 can preferably be produced on a double carpet weaving machine with three weft insertion planes SE1, SE2, SE3 (FIGS. 17, 18). This double carpet weaving machine has, in addition to the usual weft insertion systems SE1, SE2 for the upper fabric and the lower fabric, an additional third, centrally arranged weft insertion system SE3. The shot entered there is alternately in successive tours of the upper OW and the lower fabric UW assigned. He has the function of an inner weft SI, which holds the filling chain F and the Totpole PT with the help of the binding chain B4 at the back of the shots.

The binding chain B4 is routed here regularly as described in FIG. 3 with respect to the areas of the inner shots SI. The backshot group SRG4 consists of two back shots. The mutually parallel and simultaneously mutually changing pile threads PM1 and PM2 are here of different character or different color. It is possible to achieve with this technique very many different shades or characteristics of the fabric through differently characterized pile threads P.

FIG. 5 shows a modification to FIG. 4. The back-shots group SRG5 here consists of two back shots SR. The binding chain B5 binds simultaneously with a back shot SR in a symmetric bond. To ensure the same binding lengths of the binding warp threads B5 of a product change at predetermined intervals, the binding warp threads B5 with each other their functions.
5 shows by way of example also the pile thread change of pile threads PM, which are assigned to different goods OW, UW.

FIG. 6 shows a double carpet fabric in which the back weft group SRG6 consists of three back shots SR. A Totpolstrang PT is not provided here. The back shots SR are separated exclusively by the tensioned filling chain F of the inner shots SI. A special change of the function of the binding warp B with each other is not necessary here. This results from the two back shots SR, which are arranged between each two inner shots SI.

In Fig. 7, a double carpet fabric is shown, which allows any Jacquardmusterung. This also makes it clear that the pile yarn change can take place in a manner known per se such that a pile thread PM coming from the totem pole PT of the first fabric OW, guided around an inside weft SI, first appears as a patterned pile thread via a backshot SR of the other fabric UW PM binds. The previously patterned pile yarn PM, however, binds last time on the back weft SR of their own goods UW and is then returned to the Totpolstrang PT.

In the same Fig. 7 but also shown that it is optionally possible to perform a pile yarn change between pile yarns P and one and the same product against each other, exclusively on the back spine SR. The back-shot group SRG7 consists of two back shots SR. The inner shots SI are inserted between the legs of a single Polhenkels PH. There they are involved in a particularly advantageous manner to the mischkonturenfreien pile thread change.
In connection with this presentation, we would like to mention that it is not necessary to keep the entire Totpolstrang PT constantly between the inner and back shots. It is quite possible to bind individual pile threads of the Totpolstranges PT of an inner shot SI at regular intervals while the remaining Totpole PT at the bottom of the Polschicht PM sections are afloat.
Compare to this DE 196 03 691 C2.

Fig. 8 shows a double carpet fabric that can be woven on a double-threaded carpet weaving machine. The back-shot group SRG8 consists of four back shots SR. The inner weft SI is here bound solely by a symmetrically binding binding warp B8 and is located between the legs of a single Polhenkels PH. In this binding, it is possible that at low pile height, a slight cord character of the pole surface is produced.

FIGS. 9 to 12 show different back-shot groups SRG and the appropriate control of the binding warp threads B to compensate for the integration length thereof.
In Fig. 9, the back-shots group SRG9 consists of two back shots SR. The inner shots SI are inserted between two pole handles PH. The openings of the binding warp threads B9 enclose in symmetrical form two back shots SR and an inner shank SI inserted therebetween.

In Fig. 10, the back shot group SRG10 consists of four back shots SR. The binding of the inner shots SI is identical to FIG. 9. The individually binding back shots SR ensure that each inner shute bind B10 another binder warp forms the larger loop. The binding warp length compensates itself within a repeat.

The back-picking group SRG11 in FIG. 11 consists of five back-shots SR. In FIG. 9, two successive shots of the back shot SR pass through a single opening of the binding-chain B11. The following back shot SR alone reaches through an opening of the binding chain B11. This ensures that the binding warp threads B11 change their function at regular intervals.

The problem is solved in a similar manner if the weft thread group SRG12 comprises six back shots (FIG. 12). Here, the binding warp threads bind B12 twice to two consecutively inserted back shots SR. For even larger dorsal groups SRG can be ensured by any combination of the regular change of binding functions.

FIG. 13 shows that within a single double carpet material, inside shots, inner shots SI alternately between two Polhenkel PH and then enter between the legs of a single Polhenkels PH and integrate. Here, too, care should be taken to ensure that the binding length of the binding warp threads B13 is balanced again within a weave repeat. The spine groups SRG13 and SRG13 'can be selected here in different sizes. Thus, the back shot group SRG13 consists of two shots and the back shot group SRG13 'of three shots. These detritus groups change within a rapport against each other and also their order.

When choosing the binding course, you should make sure that the inner shots SI are regularly symmetrically loaded by the respective binder warp thread. An asymmetric load leads to a slight inclination of the pole limb PH to the base product.

In Fig. 14, a product is shown, which is identical in principle to that in Fig. 13. The back-shot groups SRG14 and SRG14 ', however, are significantly larger. The spine group SRG14 consists of five shots, while the spine group SRG14 'comprises six spines SR.

The choice of the size of the weft group SRG depends mostly on the desired use of the carpets. There, where high quality requirements are given to the pole faces, you choose back shot groups between two to max. five shots. However, where you want a more rustic character of the floor covering, you can increase the number of back shots per group depending on the row density up to about ten back shots.

Referring now to Figures 15 and 16, the shed forming cycles of a double carpet loom with two weft insertion planes are shown. The type of binding chosen as an example relates to that shown in FIG. In Fig. 15 are the Totpole PT, however, omitted for the sake of simplicity and clarity. The technical classification of the threads separating the back shots SR from the inner shots SI is traceable only by the filling chain F. The back weft group SRG1 is completely registered before the filling chain F changes to the outer compartment H, T and the inner weft SI can be entered. Under the influence of the usual thread tensions of the filling chain F, the inner weft SI1 aligns under the last back weft and assumes the position shown in FIG.

The Totpolstrang is shown in Fig. 16 by two dotted lines - separated for the upper and lower fabric - drawn with. In the phase of Innenschusseintrages takes place here a pile yarn change. A Totpol PM1 'and PM1 lifted from the Totpolstrang is passed in the outer compartment H, T the controls for the Musterpolbindungsrapport. The previously patterned pile yarn PM2, PM2 'is transferred in the outer compartment H or T a means of transport, which returns the same in the Totpolschar PT in the middle compartment M.

Figs. 17 and 18 show shedding diagrams for a double carpet weaving machine having three weft insertion planes SE1, SE2, SE3.
In Fig. 17 we can see that the filling chain F and, analogously, also the dead-pole PT are always guided in an upper middle compartment M 'or in a lower central compartment M "stretched between the upper and lower central compartment M', M" the third weft insertion level SE3. By means of a corresponding control of the binding warp threads B4 or B4 ', the average weft in a given change, which depends on the size of the back weft group SRG4, is assigned to either the upper OW or the lower fabric UW as inner shoe SI. In the case of larger dorsal groups SRG, if no internal weft SI is entered, then the mean weft insertion level SE3 is kept inactive.
In such a control box, the inner shot SI4, SI4 'is regularly between the legs of a single Polhenkels PH.

Fig. 18 shows, in addition to the plain weave shown in Fig. 17, the mutual pile thread change for the purpose of patterning. The arcuate arrows indicate in each case at which position the respective pile thread guide is transferred to another control system. Since the dead poles PT are regularly located in the upper M 'or in the lower middle compartment M ", a selected pile thread is there transferred to a means of transport, which moves this pile yarn PM in the associated outer compartment H or T. There then takes place the transfer to the control means, the Conversely, the pile yarn PM which has been patterned to date is transferred in an outer pocket H, T to a transport means which returns it to the middle pocket M 'or M ".

A jacquard device for a pattern-like control of the pile threads PM in this way is shown schematically in FIG. The representation is made for a pair of strands, which drives in mutual alternation two permanently arranged pile threads spiegefbildüch.
The Hubmessersysteme (knife boxes) are indicated by two in the same rhythm against each other moving lifting blades 1a, 1b. Each harness cord 26 is associated with two board pairs 2a, 2b and 3a, 3b. These pairs of boards 2a, 2b; 3a, 3b are connected to each other via a cable 2, 3, which is guided over a loose roller 21, 31. The loose rollers 21, 31 transmit their lifting movement via a corresponding web 22, 32 to further rollers 23 and 33, which are elements of a pulley. The webs 22, 32 are guided into each other. The web 22 can move freely within the web. The board pairs 2a, 2b; 3a, 3b are retaining pawls 4a, 4b; 5a, 5b assigned to a control part 6, the boards 2a, 2b; 3a, 3b can retain or release according to an intended program in this upper position. The manner of this control is described in detail in EP 0 899 367 A1 or EP 0 851 048 A1, so that a detailed description is omitted here.

It is crucial that only with this arrangement the regular transport of selected pile threads PM can take place parallel to the rhythm of the patterning pile threads PM.

In order to ensure an adequate design effort for the symmetrical control of mutually associated pile threads (eg PM2, PM2 '), it is expedient to derive the opposite movement of the second harness cord 261 from the lifting movement of the harness cord 26. For this purpose, the harness cord 261 is coupled to the harness cord 26 at 260. A frame-mounted turning roller 262 provides an opposite movement of their strand.

19, the coupling elements 27a (b, c) and 263a (b, c) are shown schematically to the strands representative of the strands.
The function of the transport elements fulfills a specific combination of the activation of the retaining pawls 5a, 5b; 4a, 4b. Another combination of activation of the retention pawls 5a, 5b; 4a, 4b provides the Polbindungsrapport. A third combination makes it possible to keep the dead poles PT in the respective middle compartment M. The combinations required in each case can be stored under certain addresses in memories and are available for the design of the sample program.

Fig. 20 shows a further design of a double carpet fabric, in which also on the inner shots SI Polhenkel PHI 'are clamped. In a single tour z. B. in a loom with three weft insertion levels three pile threads are simultaneously involved in the formation of Polhenkein. Such a bond will be especially in the background of a fabric provide where regularly monochrome, very dense areas are desired, or a greater variegation should be created by color blends of individual pile threads in the carpet.

In this Fig. 20 is not shown that these pile threads PM8 can change according to the pattern. However, it is possible, with a special control combination for the jacquard machine and these pile threads PM8, the additional Polhenkel PHI 'form to change pattern or insert according to the pattern or not to insert.

The double carpet fabric according to FIG. 21 shows a further variation possibility of the pattern design. In order to achieve clear, monochromatic - usually smaller pattern areas - it is possible to have the pile threads PM 1 'and PM3' not symmetrically patterned in pairs only separately. You do not have the usual pole density in these areas, but you can create clear colors with fewer choruses. For small pattern areas, the different degrees of density are practically invisible.

In Fig. 22 is shown a double carpet fabric which can be made on a double carpet weaving machine having four weft insertion planes SE. Here, each backshot SR is assigned an inside weft SI in each ware OW, UW, which is bound between the thighs of each pole leg PH. Such a fabric ensures a nearly ideal stability of all Polhenkel and allows a pattern change in the usual way to the usual contour. The fact that in each tour an inside shot SI is registered, it is possible to use Polwechselverfahren in which do not need to bind two different pile threads on the same back shot.
As any person skilled in the art will appreciate, this binding is also possible on a loom with pairwise weft insertion. There, however, the back shots and the inner shots would have to be entered separately in two successive tours.

In summary, we can say that this weaving technology proposed here allows very many advantages and new solutions for the design of carpets.
The position and arrangement of the pairs symmetrically registered and possibly provided with different colors Polhenkel PH leads in a mixed color range - in contrast to conventional technologies - to a checkerboard pattern structure. From a short distance, this pattern structure is perceived as a uniform color.

For example, eight pile threads per warp course, more than ninety color combinations are possible even in the smallest gradations. In this case, however, such different entry variants, as they have been designated and described in FIGS. 21 and 22, to use with. The actual realizable number of color combinations will depend to a large extent on the structure of the pattern to be weaved, because you can not or should not realize large pattern areas in a clear color with individually mustering pile threads.

The fund of a commodity will regularly match matching or complementary pile threads in color and structure both the Totpolstrang PT of the upper fabric OW and the Totpolstrang PT of the lower fabric UW. All other pile threads of these goods can be chosen so that they can produce regular blending effects and small-scale pattern sections are produced with individually mustering pile threads.

Through the description of all figures, a different and varied design of Fachbildungsrapportes the binding warp threads. If you want to allow such variability in practice, then it is of course useful to equip the double carpet weaving machine with a program-controlled dobby, which has a large number of shafts.

In the embodiments, the binding warp threads were always displayed in a single warp course. However, it is also possible in the sense of saving of textile material, stagger the binding warp threads in the weft direction next to each other in different reports and / or bind.
So you can also provide binding warp threads only in every second or possibly every third warp course, if the weft threads used or the desired use of the carpet fabric allow it.

LIST OF REFERENCE NUMBERS

1a, 1b

Hubmessersystem

2

rope

2a, 2b

circuit board

2c, 2d

tappet

21

Roll, loose

22

web

23

Roll, loose

24

Roll, frame-fixed

25

fixed bearing

26

Rope, harness

260

connection

261

control cable

262

U-turn roller

263 (a, b, c)

Coupling for stranded wire (positions)

27 (a, b, c)

Coupling for stranded wire (positions)

3

rope

3a, 3b

circuit board

3c, 3d

double hook

31

role

32

Bridge with long hole

33

role

4a, 4b

Retaining latch (for 3)

5a, 5b

Retaining latch (for 2)

6

control part

WHERE

top web

WU

under goods

SR, SR '

back filling

SRG, SRG '

Group of back shots (digit -> Fig.)

SI

Inner shot (number -> Fig.)

B, B '

Tie warp thread in general (figure -> Fig.)

F

filling warp

P

Pile threads (general)

PT

Totpolstrang (pile threads, not Polhenkel forming)

PM 1 ..... PM8

Polfaden, patterning (Polfaden, Polhenkel forming)

PM1 ', PM4' ...

Pile thread, patterning (belonging to the lower fabric)

PH, PH '

Polhenkel (over back shot)

PHI, PHI '

Pole handle (via inside shot)

H

High technical level

M,

Middle level (2 weft insertion levels)

M ', M "

Middle level (with 3 weft insertion levels)

T

Deep technical level

SE1

1st weft insertion level (upper fabric)

SE2

2nd weft insertion level (lower fabric)

SE1

3. Weft insertion plane (middle between M 'and M ")

Claims (11)

1. A method for producing a double pile fabric on a double pile loom with at least two weft insertion planes using:

   - - weft threads (SR, SI), filler warp threads (FK), and binding warp threads (B) for making the base fabrics in the form of a backing cloth (UW) and a face cloth (OW), and

   - - at least two pile threads (P) per warp course (K) for producing the pile layer between the two base cloths,

   - wherein tentered filler warp threads in both base cloths, the face and/or backing cloths, are weaved in □ mostly flatly □ between the inner (SI) and back wefts (SR), and

   - wherein the pile threads (PM) that form pile loops (PH) are symmetrically tentered in pairs in subsequent courses between weft threads of the face cloth (OW) and the backing cloth (UW);

   
   characterized
   in that back wefts (SR) forming a group (SRG) are inserted in subsequent courses into both cloths (OW, UW) simultaneously,
   in that the pile threads (PM), forming pile loops to be tentered in pairs and symmetrically to each other, at the same time bind to the back wefts (SR) of both cloths (OW, UW), and
   in that one inner weft (SI) is assigned to a group (SRG) of two to twelve back wefts (SR).
2. The method according to Claim 1, characterized
   in that the back wefts (SR) of a group are inserted in subsequent courses simultaneously in pairs into the face (OW) and backing cloths (UW), and
   in that two inner wefts (SI) are inserted in a further course simultaneously after inserting a group (SRG) of said back wefts (SR), one each in the face (OW) and backing cloths (UW).
3. The method according to Claims 1 or 2, characterized
   in that the inner weft (SI) per cloth (OW, UW) is inserted at the same time as one of the back wefts (SR) into a third, medium weft insertion plane (SE3) of the double carpet loom, and
   in that said inner weft (SI), together with at least one back weft (SR) of a cloth, reaches through an opening formed by the binding warp threads (B).
4. The method according to any one of Claims 1 through 3, characterized
   in that the back wefts (SR) of both cloths, the face and backing cloths OW, UW, are each weaved in through pairs of binding warp threads (B), and
   in that each inserted inner weft (SI) is included in this weave alone or together with at least one back weft (SR).
5. The method according to Claims 1, 2 and 4, characterized
   in that each inner weft (SI) is inserted between two adjacent pile loops (PH) that are tentered by back wefts (SR), and
   in that said inner wefts (SI), together with the adjacent back wefts (SR), reach through an opening formed by the binding warp threads (B).
6. The method according to any one of Claims 1 through 3,
   characterized
   in that additional pile loops (PHI, PHI') are tentered via the inner wefts (SI).
7. The method according to any one of Claims 1 through 3, characterized
   in that each inner weft (SI) is inserted between the sides of a pile loop (PH, PH'), and
   in that said inner wefts (SI), together with at least one back weft (SR) inserted at the same time, reach through an opening formed by the binding warp threads (B).
8. The method according to Claim 1,
   wherein other pile threads (P) that are permanently or temporarily weaved in in a generally known way as dead pile strands (PT) between the inner and back wefts (SI, SR) of each cloth are provided in addition to the pile threads (PM) that form the pile loop (PH), and
   wherein said pile threads (PM) that form the pile loops (PH) switch their positions in a generally known way with single additional pile threads (PT) under the control of a Jacquard loom,
   characterized
   in that one of the pile threads currently not forming a pile

   - is selected for figuring from the dead pile strand (PT) in a middle shed (M, M', M"),

   - is transferred into an outer shed (upper shed H, lower shed T) using transport elements and there transferred to the driving elements for the motion of pile-forming pile threads (PM), and

   
   in that the pile threads (PM) that used to form the pile

   - are transferred in the outer shed (H, T) to the transport elements to the middle shed (M, M', M") after a control operation, and

   - are guided back to their dead pile strand (PT) in the middle shed (M, M', M") by a selection operation.
9. Use of a double carpet loom with at least two weft insertion planes (SE1, SE2), a dobby and a Jacquard loom permitting at least three positions for controlling harness cords according to a pattern to perform the method according to Claim 1, characterized,
   in that the three-position Jacquard loom is used with the following parameters:

   a) the three-position Jacquard machine is equipped with at least two lifting knife systems (1a, 1b) that can be moved in opposite direction to each other,

   b) two lifter pairs (2a, 2b; 3a, 3b) are assigned to each harness cord (26), said lifters (2a, 2b; 3a, 3b) of each pair being connected using a rope (2; 3) guided via an idle pulley (21, 31), and wherein said idle pulleys (21; 31) are in a permanent driving connection with the harness cord (26),

   c) each lifter (2a, 2b; 3a, 3b) of each pair is assigned to one of the lifting knives (1a; 1b) that can be moved in opposite direction, and

   d) retention catches (4a, 4b; 5a, 5b) that can be controlled independently are assigned to each lifter (2a, 2b; 3a, 3b) of both pairs in the uppermost position.
10. Use of a double carpet loom according to Claim 9,
    characterized
    in that two heddles are assigned to each harness cord (26), of which

    - one heddle is directly attached to the harness cord (26), and

    - the other heddle is attached to a traction rope (261) attached to the harness cord via a reversing pulley (262) on a frame-fixed bearing that guides said traction rope, and

    
    in that the two heddles connected to a single harness cord (26) guide two pile threads (PM1, PM2) that figure simultaneously and symmetrically, thus forming a point of the pattern.
11. A method for producing a double pile fabric on a double pile loom with at least two weft insertion planes using:

    - - weft threads (SR, SI), filler warp threads (FK), and binding warp threads (B) for making the base fabrics in the form of a backing cloth (UW) and a face cloth (OW), and

    - - at least two pile threads (P) per warp course (K) for producing the pile layer between the two base cloths,

    - wherein tentered filler warp threads in both base cloths, the face and backing cloths, are weaved in - mostly flatly - between the inner (SI) and back wefts (SR), and

    - wherein the pile threads (PM) that form pile loops (PH) are symmetrically tentered in pairs in subsequent courses between weft threads of the face cloth (OW) and the backing cloth (UW);

    
    characterized
    in that in four weft insertion planes one back weft (SR) and one inner weft (SI) each are simultaneously inserted in every course in both the face cloth (OW) and the backing cloth (UW).
    in that the pile threads (PM) forming pile loops to be tentered in pairs and symmetrically to each other at the same time bind to the back wefts (SR) of both cloths (OW, UW).

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