CN112789372A

CN112789372A - Loom for producing a fabric having folds, in particular pleated folds and/or loops, and method for producing such a fabric

Info

Publication number: CN112789372A
Application number: CN201980066892.6A
Authority: CN
Inventors: M·朗格; K·莫茨
Original assignee: Lindauer Dornier GmbH
Current assignee: Lindauer Dornier GmbH
Priority date: 2018-10-11
Filing date: 2019-09-26
Publication date: 2021-05-11
Also published as: DE102018217421B4; EP3864209A1; WO2020074264A1; JP2022504592A; DE102018217421A1

Abstract

A weaving machine for producing a fabric provided with folds, in particular pleated folds and/or loops is provided. The weaving machine has a fabric draw-off mechanism (3) and at least two let-off devices (1, 2), the warp threads of which can be supplied from a respective yarn reserve. The respective drives of the fabric draw-off mechanism (3) and the let-off devices (1, 2) are designed and can be controlled or adjusted in such a way that the fabric draw-off mechanism (3) and the let-off devices (1, 2) perform a forward movement in a fabric draw-off direction (14) during the weaving of a wrinkle-free or terry-free fabric section, and the fabric draw-off mechanism (3) and the let-off devices which do not produce the wrinkles/terry correspondingly perform a backward movement opposite to the fabric draw-off direction (14) without stopping the weaving machine (10) and the let-off devices perform an independent movement for the wrinkles or terry relative to the other let-off devices without stopping the weaving machine. The rearward movement is coordinated with the size and characteristics of the wrinkles or loops. Furthermore, a method for producing a fabric having folds, in particular pleated folds, and a method for producing a fabric having loops are described.

Description

Loom for producing a fabric having folds, in particular pleated folds and/or loops, and method for producing such a fabric

Technical Field

The invention relates to a weaving machine for producing fabrics with folds, in particular pleated folds and/or loops, and to a method for producing fabrics with folds, in particular pleated folds, and to a method for producing fabrics with loops.

Background

In the known method, the pleating crease is woven as follows. The fabric was woven as a single layer with the face and bottom warps until the beginning of the tuck crease. When the tuck crease should be woven, the warp system (kertsystem) is moved completely into the upper shed or lower shed as the weaving of the tuck crease begins. When the tuck fold should be woven on the upper side, one of the warp systems is moved into the lower shed. When the tucking crease should be produced on the underside, the warp yarn system is moved into the upper shed. When, for example, wrinkles are to be woven on the upper side, the bottom warp is, for example, moved completely into the lower shed, wherein the fabric withdrawal mechanism and the bottom warp are stopped. The weaving of the pleating folds is now carried out with a face warp. Since the fabric is not pulled out, a drooling (vortex) is produced from the point of intersection, which increases to the length of the folds. This means that the tuck fold has an undefined weft thread density, which is derived from the woven and knitted material. This known method is therefore also referred to as the sialorrhea method. Due to the unloading of the cloth after beating up, the table warp requires a spring energy store, for example in the form of a dancer roll known per se, whereby the warp tension is not collapsed. To set the tucked creases, the scrim is unbuckled (abgebunden). Thereafter, the single-layer fabric is again woven, wherein all warp yarn axes are shifted (Kettachsen). The beginning, end and orientation of the tuck creases are controlled by so-called pattern-specific trajectories.

A variant known in the prior art for weaving terry loops is the principle of terry fabric weaving (Frottierwebens), in which the so-called ground warp is very tight, while the terry warp is more loosely tensioned. The loops are now produced by: preferably, three or four weft threads are not beaten up directly at the selvedge, but are added for this purpose at intervals which usually correspond to double the loop height. This can be done by means of a so-called bell crank (Knicklade) on the one hand or by means of a movable rear/breast beam on the other hand, whereby a fabric movement is achieved. Only after the last preliminary beat-up is the weft thread beaten up again completely. In this case, the weft yarns of the looser terry warp yarns slide over the ground warp and thus form terry loops.

Alternatively to the already described method of napping on a normal flat knitting machine, the tucking crease can likewise be produced in the fringe area by means of a terry loom. Here, for example, the possibility of movement of the fabric is used, and the fold height is not determined by the cloth of the saliva.

In order to weave the tuck fold on the upper side, the bottom warp is also moved completely into the lower shed, and the fabric withdrawal mechanism and the bottom warp are stopped. The folds are likewise woven in a face warp. For this purpose, the fabric together with each weft thread is moved away from the interlacing point at a predetermined weft thread spacing. The tucked creases are then organized by returning to the interlacing point.

EP 0225239B 1 describes a method by means of which a floating ground warp system is pulled back by means of a synchronized movement of warp and fabric systems and thereby the folds of the continuous weave are woven during the weaving process.

Reference is made in EP 0339223B 1 to the particular relevance of warp tension for this fabric manufacturing process. During the weaving process, the ground warp is held under a preload with the warp yarn system 1, wherein the fabric draw-off roller is rotated by means of an electronically controlled running return device in order to crease the amount of fabric. The ground warp thereby becomes loose and is rewound onto a beam by means of a medium-sized motor. The amount of the warp thread rewound (ricknahme) corresponds here to the crimp length. After the operating tension of the ground warp, i.e. the warp system 1, has been reached again, the weaving machine is automatically put into operation again. The fabric weft yarn (aufgeschogen) formed by the crumpled warp yarns and the crumpled weft yarns is crumpled by sliding the subsequent beat-up of the first shaped weft yarn of the new interlacing loop into the second shaped weft yarn of the previous interlacing loop. The fixing weft yarn contributes here to the further fixing of the folds. In this method, it is disadvantageous that the weaving machine has to be stopped during the crumpled weaving. This is disadvantageous both for the production speed and for the weaving machine, in which the respective mass must be braked and stopped each time a weaving crease occurs and then accelerated again.

DE 1535575 a describes a method and a device for producing a corrugated fabric on a weaving machine. Here, the weaving of the folds in the fabric is promoted by the weft shedding of the divided warp yarn system. To compensate for the return movement of the warp system, a swinging hinge lever is used behind the rear shed. Here, on the one hand, the fabric pull-out movement is interrupted and, on the other hand, the warp threads are placed in the non-use position. The backward movement of the warp threads and thus also of the woven fabric is limited by a settable pawl which cooperates with an additional ratchet in the fabric withdrawal device. In the case of folds of different sizes one after the other, a plurality of ratchet wheels with pawls must be correspondingly arranged, so that the weaving machine must be constructed relatively complex.

Disclosure of Invention

In contrast, the object of the present invention is to provide a weaving machine for producing fabrics with folds, in particular pleated folds and/or loops, and a method for producing such fabrics, the structure of which is not significantly more complex and in addition the production speed is not limited, wherein the fold height and the loop height are to be able to be set or produced at will.

This object is achieved by a weaving machine having the features according to claim 1 and by a method having the features according to claim 6 and by a method according to claim 7. Suitable developments are defined in the corresponding dependent claims.

According to the invention, a weaving machine for producing fabrics with folds, in particular tucked folds and/or loops, has a fabric draw-off mechanism and at least two let-off devices. The warp threads of the let-off device can be supplied by a corresponding thread reserve (fanenvorr ä ten), wherein the respective drives of the fabric draw-off mechanism and the let-off device are configured and can be controlled or adjusted in such a way that the fabric draw-off mechanism and the let-off device perform a forward movement in the sense of the fabric draw-off direction when weaving a non-creased or non-terry fabric section, and the fabric draw-off mechanism and the let-off device which does not produce a crease or a terry correspondingly perform a backward movement opposite to the fabric draw-off direction when weaving the crease or a terry. The weaving machine does not have to be stopped here. The let-off devices for the folds or loops are moved or stopped independently of the other let-off devices. The backward movement of the fabric draw-off mechanism and the let-off device without the formation of wrinkles/loops is coordinated with the size and characteristics of the wrinkles or loops.

Thus, according to the invention, any desired size of the folds or loops can be produced without stopping the weaving machine by the fabric withdrawal mechanism and the corresponding backward movement of the let-off device without the folds/loops being produced.

That is to say, according to the invention, in the case of two warp axes, the warp beam provided for the front warp performs a continuous movement, while the warp beam provided for the bottom warp and the fabric draw-off mechanism perform a backward movement for loop formation and for crumple weaving. By means of this backward movement, the warp-woven part behind the interlacing point is transported back to the interlacing point, so to speak, in the direction of the reed, counter to the direction of fabric withdrawal during the formation of the fold, so that during the backward movement it is also possible to weave the fold, which was previously untwisted from the floating warp threads, by a plurality of empty weft threads (leisch shell). During the formation of the loops, the fabric is also fed back in the direction of the reed, counter to the fabric withdrawal direction, and the loops are woven after they have been previously separated from the floating warp threads, optionally also over a plurality of empty picks.

According to the invention, there is a drive for the fabric draw-off mechanism and for the let-off device, by means of which drive a backward movement of the let-off device and/or the fabric draw-off mechanism and thus a great flexibility in the size of the loops or folds is achieved without additional mechanisms. Such additional mechanisms are necessary, for example, when weaving terry fabrics in order to move the fabric during weaving. Since the loop fabric lift is limited by the mechanism, the loops or folds can also be produced only within very narrow limits up to a maximum of 20 mm. Due to the great flexibility of the weaving machine according to the invention and the fact that the weaving machine does not have to be stopped even when the fabric draw-off mechanism and the let-off device which does not produce wrinkles/loops run backwards, the most different fabrics with wrinkles and/or loops can be produced with high productivity, such as for example carpet fabrics, contrast fabrics, wire structures, composite components with profiles and reinforcements, ski snow fences, special effects for clothing, mat materials and curtains.

The machine according to the invention is already distinguished from the known methods of making up a cast fabric by the fact that the let-off device according to the invention achieves a defined weft thread density, for example by means of a top warp knit crease or a tuck crease, and a fabric draw-off mechanism with a falling bottom warp. When the weaving of the crumples or gatherers is finished, the crumples are connected to the base warp by means of the subsequent weft thread and are shaped accordingly. The top warp is stopped or a separate movement relative to the bottom warp is carried out, during which the fabric withdrawal mechanism and the bottom warp return to a defined amount and thereby crease or gather crease the weft thread.

The machine according to the invention or the method according to the invention thus has the major advantage that the creased or pleated creased fabric is built up with a defined weft thread density. Here, a spring energy store is not necessary, which is used in the quilting process to absorb the existing suction movement of the quilting. It is also possible to weave the folds without modifications, such as spring energy stores. Depending on the size of the fold and the power of the drive, the movement of the weft-release thread must be corrected by means of an empty weft if necessary. Here, the loom is not stopped.

Warp terry loops can also be knitted by means of the method which is also referred to as the axis reversal method (achseneversmethode). That is, instead of weaving the fabric when warp terry is being knitted, all let-off devices and fabric take-off mechanisms are typically moved forward in the fabric take-off direction by twice the length of the terry and then let-off devices such as the bottom warp and fabric take-off mechanisms are moved backward while the top warp is typically stopped, thereby knitting the terry. Here, the loom is not stopped.

This presents a major advantage with respect to the devices according to the prior art. It is therefore possible to produce fabrics with crumpled or pleated crumples and also loop or spacer fabrics and combinations of said fabrics by means of the described mechanism or by means of the described method.

Since the drives for the individual let-off devices and the cloth take-off mechanism can be controlled or adjusted as desired in the sense of forward operation, stopping and in the sense of backward operation, a correspondingly large number of different let-off devices can be actuated. At a minimum, to implement the principle according to the invention, two let-off devices are driven accordingly and can be operated and at least three yarns are necessary. For example, it is fully possible to handle six let-off devices as well as more let-off devices. In essence, each driven and returnable bobbin can be a respective let-off device, so that in principle several thousand let-offs are possible. The basic concept here is that the let-off device and the web extraction mechanism move in a correlated manner. It is thereby possible to produce the fabric without restriction with regard to the loop or crease height. The same applies to the fabric density of the crease or the gatherable crease itself. That is, a completely new and more versatile possibility of fabric production results, which is limited only by the material properties of the applied yarns, the desired interlacing and the handling of the fabric at the fabric draw-off mechanism.

For the minimum case in which there are two let-off devices and three yarns, the let-off device made of one yarn is the one whose yarn is spread out into a loop, while the let-off device made of two yarns and present for the purpose of untangling of the loop runs back in connection with the fabric draw-off mechanism. That is to say, according to the invention, at least one of the two let-off devices always runs back. However, it is also possible to provide a large number of let-off devices for weaving, at least one of which runs back.

The main difference between the weaving of the cast fabric and the axis inversion method is that the fabric density in the folds during the weaving of the cast fabric is undefined and higher than in the remaining fabric, while in the axis inversion method a settable controlled fabric density can also be achieved in the folds.

Within the scope of the present invention, the following concepts are understood as follows. "web draw-off mechanism" is understood to mean a drive train consisting of a feed roller (Einziehwalze), that is to say a roller for drawing off the finished web, a gear and a motor, and an electronic converter. "let-off device" is understood to mean a drive train consisting of a warp beam, a gear, a motor and an electronic converter, wherein, during weaving, each warp thread from a bobbin creel (Spulengatter) may be represented by a let-off device. By "yarn reserve" is understood warp threads which are wound on a warp beam or are provided on a creel in the sense of a warp reserve, wherein the warp reserve is wound on a single bobbin which is arranged in a creel stand. In this case, each individual bobbin can be moved individually, which corresponds to a positive positioning relative to the weaving machine movement, or the entire warp yarn group is fed to the weaving process by means of so-called dummy rolls (Dummywalze). The latter can be compared from a process point of view to weaving from a warp beam. By "terry" is understood the unloading of warp yarns floating by compression of the fabric between the beginning and the end of the float in the warp direction. If there is no fabric between the beginning and the end of the float, a closed loop can be formed. The terminal end of the floating portion is located on the open end of the floating portion. By "fold" is understood a fabric section that slides out of the base fabric or is knitted in, which is in turn knitted into the base fabric at its stitches. The height of the loops or folds, that is to say the size of the loops or folds, is determined by the compressed features. The loops and/or folds can be arranged on the upper side of the fabric, on the lower side of the fabric or on both sides.

That is to say, the yarn reserve is preferably configured as a let-off device with a warp beam or according to a further embodiment as a let-off device in the form of a creel bobbin.

Preferably, a corresponding number of let-off devices is provided depending on the fabric construction and let-off device configuration. By means of the individual control of each let-off device, it is thereby possible to set loops or folds with different heights, widths or arrangements at any desired point with great flexibility.

According to a further aspect of the invention, a method for producing a fabric having folds, in particular pleated folds, is provided, wherein a fabric draw-off mechanism and at least two let-off devices are provided, the warp threads of which are supplied from their respective thread reserve, preferably in the form of a warp beam or a creel bobbin. At least one let-off device and the fabric take-off mechanism are reversible with respect to their drive direction, which means that the let-off device and the fabric take-off mechanism can be controlled in reverse. "reverse" is understood to mean the direction opposite to the direction of withdrawal of the woven fabric. In the method according to the invention for producing a fabric with folds or tucked folds, a section of the fabric is woven with at least one first and one second warp run-in device at a length defined for the fold height, wherein warp threads of the warp run-in device which are not required for the weaving of the folds remain in the end position of their shedding means. Subsequently, the warp threads of the warp-transport device which do not participate in the folding are shaped by shed change by means of at least one weft insertion. And finally the let-off device and the fabric withdrawal mechanism which do not participate in the folding are returned to the defined position in which the folding is formed.

According to yet another aspect, a method for manufacturing a fabric having loops is provided. In the method, a fabric draw-off mechanism and at least two let-off devices are provided, the warp yarns of which are supplied by their respective yarn reserve. Preferably, the yarn reserve is defined in the form of a beam or a single creel bobbin. At least one let-off device and the fabric take-off mechanism are reversible with respect to their drive direction, which means that the drives for the let-off device and the fabric take-off mechanism can be reversed so that the let-off device and the fabric take-off mechanism can be moved in opposite directions. Here, "in the opposite direction" means in the direction opposite to the drawing-out direction for the completed cloth. In the method according to the invention, the unwoven fabric sections are first drawn off in the fabric draw-off direction by a length defined for the loop height by means of a fabric draw-off mechanism and a let-off device, and the let-off device for forming the loops is subsequently stopped. The warp threads participating in the terry loop are then shaped by the warp threads of the warp let-off device not participating in the terry loop by means of a shed change by at least one weft insertion, after which the warp let-off device not participating in the terry loop and the fabric draw-off mechanism are moved back into the defined position in which the terry loop is formed. Preferably, the method has at least one first let-off with at least one yarn and a second let-off with at least two yarns.

According to a development of the invention, the yarn reserve of each let-off is a warp beam.

Preferably, the crumpled weaving movement is corrected by means of at least one empty weft.

Depending on the type of fabric, the folds are preferably arranged on the upper side and/or on the lower side of the fabric.

Preferably, the loop weaving movement is corrected by means of at least one empty weft thread, similar to a creased, in particular a creased, weave.

Further preferably, the loops are arranged on the upper side and/or the lower side of the fabric. When there are a plurality of independently driven returnable warp beams which can be driven side by side, folds and/or loops can be produced alternately in any desired number and, if appropriate, also only in partial regions of the weaving width. This means great flexibility in the weaving technique.

Drawings

Further details and possible applications of the invention will now be described with the aid of the drawing, which is a specific embodiment of the invention. In the drawings:

fig. 1 shows a stylized side cross-sectional view of a weaving machine according to the invention for illustrating the principle of the weaving of the tuck folds;

fig. 2 shows the main four main steps for producing the tuck fold in the fabric by means of a side view of the fabric in the weft direction;

FIG. 3 shows a stylized side cross-sectional view of a loom for weaving terry loops; and

fig. 4 shows the four main steps in the weaving of the loops as a side view of the fabric in the direction of the weft.

Detailed Description

Fig. 1 shows a stylized side sectional view of a weaving machine 10, by means of which a fabric with pleated folds can be produced. The weaving machine 10 has a base warp 1 which is wound on the illustrated warp beam and is unwound therefrom and supplied to the actual weaving. Furthermore, the weaving machine 10 has a gauge 2 which is wound on a respective warp beam and unwound therefrom and is supplied to the actual weaving. In addition, a web extraction mechanism 3 is drawn in, by means of which the produced web is extracted in the weaving direction 14. The weaving shed 7, into which a weft thread (not shown) is inserted, is braced by means of shed-forming means configured as heald frames 8. The weaving sley 9 is arranged for beating up the added weft yarn to the interlacing point. The bottom warp 1 is shown as a solid line, while the top warp 2 is shown as a dashed line, the bottom warp and the top warp being guided in the direction of a cloth take-off mechanism 3, which winds the finished cloth, which is also shown in dashed lines, onto a cloth spindle 13. Both the warp beam for the bottom warp beam 1 and the fabric draw-off mechanism 3 with its respective drive can be moved backwards counter to the fabric draw-off direction for the finished woven fabric. This backward movement is necessary in order to weave the respective woven sections for the tuck fold, which is shaped before being returned into the fabric.

The main steps I to IV are shown in fig. 2 for weaving the gather folds 11. The bottom warp 1 shown in fig. 1 is made of bottom warp yarns 4 and the top warp 2 also shown in fig. 1 is made of top warp yarns 5, as this is shown in fig. 2.

In step I, bottom warp yarn 4 and surface warp yarn 5 or bottom warp yarns 1 and surface warp yarns 2 form a closed fabric. In the production of a closed fabric, both the bottom warp 1 and the top warp 2 and thus the bottom warp 4 and the top warp 5 move in the weaving direction. The fabric extracting mechanism 3 extracts the fabric. The weft thread 6 is accordingly inserted into the weaving shed, the weaving shed is subsequently closed and the weft thread 6 is unwound by means of a shed change. After the weft yarn 6 has been debundled, it is beaten up to the interlacing point by means of a weaving sley 9 (see fig. 1).

In step II, the pleated and creased fabric is woven. The top warp 2 forms a fabric with top warp 5 (see dashed lines) and weft 6. The bottom warp yarns 4 (see solid lines) run under the fabric, that is to say are not connected to the fabric made only of the top warp yarns 5 and the added weft yarns 6.

In step III, the pleated crease is shaped by means of the bottom warp 4. This is done by at least one shed change by means of weft insertion.

According to step IV, the pleated crease 11 is compiled. This is done by stopping the table warp 2 with the table warp 5. The tucking crease 11 is aligned by simultaneously moving the bottom warp 1 with the bottom warp 4 and the cloth take-off mechanism 3 backward in the weaving direction 14. When the tuck fold 11 is laid, the top warp 2 with the top warp 5 can be completely stopped or can also perform an independent compensating movement. In step IV, it can be seen in the figure that the gather folds 11 are unfastened from the bottom warp yarns 4 of the bottom warp yarns 1. The possible height of the tuck fold 11 and thus its size is determined from the floating length of the bottom warp thread 4 of the bottom warp 1 without having to change further settings on the machine side. It is possible to produce not only closed gather folds 11 but also open gather folds 11 at the root of the gather folds.

Thus, there is a high flexibility for different desired tucking folds. The tuck fold 11 shown in fig. 2 is formed in the case in question with a face warp 2 or a face warp yarn 5. It is likewise possible to configure the bottom warp 4 correspondingly as a tucker fold 11, which is then unbound from the top warp 5. In the illustration, the tuck fold 11 is laid upwards, but it can equally well be arranged on the underside of the fabric. Due to the high flexibility caused by the drives for the let-off device and the fabric draw-off mechanism, it is possible to arrange the tucking folds 11 at any position at any height and either at the upper side or at the lower side of the fabric or at both sides.

In fig. 3, a stylized cross-sectional side view of the weaving machine 10 is shown, similar to the illustration according to fig. 1, which in the principle drawing is provided for weaving terry loops by means of the movement of the let-off device and the fabric withdrawal mechanism. In the illustration according to fig. 3, the main elements for weaving the loops are again shown. Reference numeral 1 is a warp beam for bottom warps, from which bottom warp yarns 4 are supplied to weaving. The warp beam for the top warp 2, from which the top warp 5 is supplied to the weaving, is also shown. The warp yarns form a weaving shed 7, which is realized by means of a shedding device configured as a heald frame 8. The weft thread introduced into the weaving shed 7 is beaten up to the interlacing point by means of the weaving sley 9. The finished fabric, in this case the fabric with the produced loops 12 (see fig. 4), is pulled out by means of the fabric pull-out mechanism 3. The drives for the bottom warp 1 and the cloth take-off mechanism 3 are again designed in such a way that their direction of rotation can be reversed, so that the bottom warp 1 with the bottom warp 4 and the cloth take-off mechanism 3 can execute a movement counter to the weaving direction 14, as a result of which the terry loops can be correspondingly knitted (see fig. 4).

In fig. 4, the main four steps are shown, by means of which the weaving of the loops 12 is described in principle. In step I, weaving of the terry-free fabric is carried out. Here, the bottom warp 1 with bottom warp 4 and the top warp 2 with top warp 5 form a closed fabric, wherein both the bottom warp 1 and the top warp 2 rotate in the weaving direction 14. The fabric draw-off mechanism 3 likewise draws the finished fabric in the weaving direction 14 and supplies it to a fabric shaft 13 (see fig. 3) which is likewise shown in fig. 3.

In step II, the floating portion is manufactured. For the float, the bottom warp threads 4 and the top warp threads 5 are drawn off from the respective warp beam, that is to say from the bottom warp threads 1 and the top warp threads 2. By not adding weft yarn 6 here, a float is created. No normal fabric is present within the float, since no weft yarn 6 has been added previously.

Subsequently, the float is shaped in step III. This is done by: at the end of the float, that is to say when the desired float length is reached, the bottom warp thread 4 and the surface warp thread 5 are fixed to one another. This is done by at least one shed change by means of weft insertion.

And finally the weaving of the loops 12 takes place in step IV. This is done by: the top warp 2 with top warp 5 is first stopped. The loops 12 are formed because the base warp 1 and the fabric withdrawal device 3 move counter to the weaving direction 14. In this way, it is possible to produce any desired loop height and any desired loop density for the fabric to be provided with loops not only on its upper side but also on its lower side.

In fig. 1 to 4, the bottom warp 1 with bottom warp yarn 4 is shown as a solid line and the top warp with top warp yarn 5 is shown as a dashed line. Weft yarn 6 is shown as a black circle.

List of reference numerals

1 let-off device/bottom warp

2 let-off device/watch warp

3 fabric take-out mechanism

4 bottom warp

5 surface warp yarn

6 weft yarn

7 weaving shed

8-shaft shedding device

9 weaving sley

10 loom

11 crumple/gather crumple

12 terry

13 textile shaft

14 weaving direction/fabric withdrawal direction.

Claims

1. Weaving machine (10) for producing a fabric provided with folds (11) and/or pile loops (12), having a fabric draw-off mechanism (3) and at least two let-off devices (1, 2), the warp threads (4, 5) of which can be supplied by a respective yarn reserve, wherein the respective drives of the fabric draw-off mechanism (3) and the let-off devices (1, 2) are designed and can be controlled or adjusted in such a way that the fabric draw-off mechanism (3) and the let-off devices (1, 2) carry out a forward movement in a fabric draw-off direction (14) during the weaving of a wrinkle-free or pile-free fabric section and the fabric draw-off mechanism (3) and the let-off device which does not produce wrinkles/pile, respectively, carry out a backward movement opposite to the fabric draw-off direction (14) and the resulting movement without stopping the weaving machine (10) when the folds or pile loops are being laid The let-off devices are moved or stopped independently of other let-off devices for creasing or looping, wherein the backward movement is coordinated with the size and characteristics of the creasing or looping.

2. The weaving machine (10) according to claim 1, wherein the yarn reserve is configured as a let-off device (1, 2) with a warp beam.

3. The weaving machine (10) according to claim 1, wherein the yarn reserve is configured as a let-off device (1, 2) in the form of a creel bobbin.

4. The weaving machine (10) according to any one of claims 1 to 3, wherein the first let-off has at least one yarn and the second let-off has at least two yarns.

5. A weaving machine as claimed in any one of claims 1 to 4, wherein a corresponding number of let-off devices is provided depending on the fabric construction and let-off device configuration.

6. Method for producing a fabric with folds (11), wherein a fabric draw-off mechanism (3) and at least two let-off devices (1, 2) are provided, the warp threads (4, 5) of which are supplied by their respective thread reserve, wherein at least one let-off device is reversible with respect to its drive direction and the method has the following steps:

a) weaving a fabric section with at least one first and one second warp thread feed device in a length defined for the fold height, wherein warp threads of the warp thread feed device which are not required for the weaving of the fold remain in the end position of the shed-forming means thereof;

b) shaping the warp-knitted folds by warp threads of the warp let-off device which do not participate in the folds by at least one shed change by weft insertion; and

c) the let-off device and the fabric withdrawal mechanism, which do not participate in the folding, are returned to the defined position in which the folding is formed without stopping the weaving machine.

7. Method for producing a fabric having terry loops (12), wherein a fabric draw-off mechanism (3) and at least two let-off devices (1, 2) are provided, the warp threads (4, 5) of which are provided by their respective thread reserve, wherein at least one let-off device is reversible with respect to its drive direction and the method has the following steps:

a) -withdrawing an unwoven fabric section in a fabric withdrawal direction (14) by a length defined for the loop height by means of the fabric withdrawal mechanism (3) and the let-off devices (1, 2) and thereafter stopping the let-off devices forming the loops;

b) sizing the warp yarns participating in said pile loops with warp yarns of a warp let-off device not participating in said pile loops by at least one shed change by weft insertion; and

c) the let-off device and the fabric withdrawal mechanism (3) which are not involved in the terry are moved back into the defined position in which the terry is formed without stopping the weaving machine (10).

8. Method according to claim 6 or 7, wherein the first let-off has at least one yarn and the second let-off has at least two yarns.

9. Method according to any one of claims 6 to 8, wherein the yarn reserve of each let-off device (1, 2) is a warp beam respectively.

10. The method according to any one of claims 6 to 8, wherein the yarn reserve is provided on a creel bobbin.

11. Method according to any one of claims 6 and 8 to 10, wherein the crumpled weaving movement is corrected by means of at least one empty weft.

12. Method according to any one of claims 6 and 8 to 11, wherein the folds are arranged on the upper and/or lower side of the fabric.

13. Method according to one of claims 7 to 10, wherein the pile weaving movement of the pile is corrected by means of at least one empty weft.

14. The method according to any of claims 7 to 13, wherein terry loops are arranged on the upper side and/or the lower side of the fabric.

15. Method according to one of claims 6 to 14, wherein a plurality of individually driven let-off devices are provided over the weaving width for the purpose of forming folds (11) and/or loops (12) over respective partial regions of the weaving width.