EP2531639B1 - Loom for producing woven fabrics having added weft effects - Google Patents

Description

The present invention relates to a weaving machine for producing fabrics with additional weft effects.

In weaving machines, it is known in the prior art to include additional threads running in the warp direction in such a way to the weave that certain additional impact effects are achieved. For this purpose, these effect threads are placed in the weft direction before the entry of a weft thread for each cycle of movement of the loom in another position.

Such a loom, for example, shows the device according to EP 0 957 191 , This device is characterized in that there are means for moving additional warp threads. These means consist in curved bars, which are arranged on support beams, which are arranged downstream of the reed. A disadvantage of this arrangement is that the weft insertion is hindered by the curved rods in the area in front of the reed. An application in air-jet weaving machines, in which a channel for guiding the weft thread to be introduced is integrated in the reed, seems impossible and also with the use of gripper elements are given with this arrangement restrictions.

Also the US 3,796,234 as well as the US 2009 0272 455 A1 describe devices for moving additional warp threads or effect threads, which are also arranged in front of the reed in the region of the fabric edge to which the weft yarn is struck.

In the EP 263,392 Also, a loom with devices for shifting additional warp threads - so-called diagonal threads - described in the weft direction. These devices consist in one embodiment in diagonal yarn displacement rollers, which by means of thread-like grooves, the diagonal yarns for each cycle of movement of the loom transport a Rietlücke further in the weft direction. In all embodiments of the EP 263,392 are shifting devices between the supply rolls for the warp threads or diagonal threads and the various shed forming elements arranged, with which the base warp threads or the diagonal threads are deflected vertically to form a shed.

The EP 263,392 also describes Webblatteinrichtungen whose reed teeth can enter and disappear in the bevy of warp threads and diagonal threads. From this entry and exit each of the complete crowd of all warp threads and diagonal threads is affected.

The CH 27499 shows a device for moving warp yarns in the weft direction, which is arranged between the reed and the shed forming elements. With this device, however, additional threads or effect threads in the weft direction can only be displaced over such warp threads and tied off with a weft thread, all of which are pulled together with the respective effect thread into one and the same reed gap of the reed.

The US 4,429,722 Finally, describes a device for moving warp threads in the weft direction, which is arranged between the reed and the shed forming elements. There are upwardly open Rietlücken present, in the effect threads and dive. The device seems only applicable for coarse effect threads with limited displacement.

The object of the present invention is to provide a weaving machine for the production of fabrics with additional weft effects, in the effect threads, which are supplied in addition to the warp threads for each cycle of the weaving loom weave weaving dependent within wide limits variable in the weft direction over several retracted in different Rietlücken warp yarns away can be moved and tied with the weft threads, without being hindered by additional mechanical elements between reed and fabric edge of the weft insertion. The arrangement should be suitable for air and rapier weaving machines and enable high web performance. The use is to be possible for fabrics which have warp densities in the range of conventional clothing fabrics, but also for lattice-like fabrics with low warp density.

The object is achieved by a loom according to claim 1.

• Bilden eines von Kettfäden begrenzten Webfachs durch Fachbildeelemente,
• Positionierung eines Effektfadens oberhalb eines einzutragenden Schussfadens,
• Verschieben des Effektfadens in Schussrichtung um einen
  für jeden Bewegungszyklus vorgegebenen Verschiebeweg;
• Positionierung des Effektfadens unterhalb des nächsten einzutragenden Schussfadens
• Eintrag des Schussfadens in das Webfach in einer Schussrichtung
• Anschlagen des Schussfadens an einen Geweberand durch eine Webblatteinrichtung, die eine Anschlagbewegung mit zwei Endpositionen ausführt.

The method of making a fabric with added weft effects is based on successive cycles of motion of a weaving machine. In this case, a movement cycle consists of the process steps already known in the prior art

• Forming a shed bounded by warp shed by shedding elements,
• Positioning an effect thread above a weft thread to be inserted,
• Move the effect thread in the weft direction by one
  predetermined displacement for each cycle of motion;
• Positioning of the effect thread below the next weft thread to be entered
• Entry of the weft thread into the shed in a weft direction
• Striking the weft thread to a fabric edge by a Webblatteinrichtung that performs a stop movement with two end positions.

The method is characterized in that the effect thread emerges in the positioning above the weft thread to be introduced in the vertical direction from a reed gap formed by reed teeth unilaterally open and immersed in positioning below the next weft thread to be inserted into another Rietlücke.

Such formed Rietlücken arise when summarizing the reed teeth of a reed only at its lower end in a Rietbund, with a provided in conventional reeds upper Rietbund deleted.

To set the effect threads with the registered weft threads, the effect threads must be brought alternately into the upper or lower shed during the weft insertion.

This positioning is accomplished by placing the guide means with the effect thread over one of the shedding elements - e.g. a heald - and thus by one of the shed drives a shedding machine in the direction of the shingles so vertically up and down driven.

For this purpose, guide means, displacement device and displacement drive are connected to one of the shedding elements.

In order to produce the movement sequence according to the described method, according to the invention, a guide means of the effect yarn is moved in the vertical direction and in the weft direction in a plane which is arranged between the shed forming elements and the end position of the stop movement which is closer to the shed forming elements.

With the method, the desired additional impact effects can be achieved without disturbing the weft insertion by mechanical elements in the area in front of the reed.

By dipping or immersing the effect yarn, it is possible according to the invention to move the effect thread in the position above the weft thread to be introduced even over several Rietlücken - and thus over one or more warp yarns away - in the weft direction.

In a preferred embodiment of the invention, the guide means on thread eyes with round, oval or slot-shaped opening through which the effect threads are guided. The different opening shapes allow an adaptation to different cross sections of the effect threads used.

Furthermore, it is particularly advantageous if the guide means is designed so that it has a wedge-shaped or conically shaped tip facing the warp threads in the region below the thread eye. By the tip is supported according to the invention that in a vertical movement, the guide means the base warp threads apart such that adjacent warp threads each form a lane for the passage of the effect yarn when immersed in a Rietlücke. This avoids that the effect thread when entering and exiting undesirably intersects with adjacent warp threads. An advantageous embodiment of the method also provides that several effect threads are moved and positioned simultaneously.

For certain binding forms of the tissue to be produced, it may be useful that the effect thread is not positioned below the weft thread to be introduced during one or more movement cycles. There is then no bond between this effect thread and the subsequently entered weft instead. The effect thread lies in the finished fabric over the registered weft thread.

Also possible is a modification of the method in which a plurality of effect threads are displaced in opposite directions and / or with different displacement paths in the weft direction.

This can also achieve more complex additional impact effects.

The loom according to the invention according to the independent device claim includes any known types of shingles for driving shed elements, the vertical movement of which forms a shed bounded by warp threads. Furthermore, facilities for the entry of a weft thread in the shed in a weft direction and a Webblatteinrichtung for striking the weft thread to a fabric edge are present. Finally, this loom contains a displacement drive, which in Weft direction drives a displacement device to which according to the invention at least one guide means is provided, with which an effect thread can be moved in the weft direction and positioned vertically. In this case, different displacement paths of the effect thread in the weft direction for different movement cycles of the weaving machine can be predetermined via the displacement drive. Of course, a group of several guide means for a plurality of effect threads may also be attached to a displacement device so that they can be displaced synchronously with each other in the weft direction.

In general, the effect threads which come into consideration here run essentially in the warp direction within the weaving machine and are pulled off from a thread supply on the back side of the weaving machine.

The warp direction refers to the course of the warp threads from the back to the front of the loom, regardless of the vertical position in which the respective threads are located.

At the Webblatteinrichtung a weaving machine according to the invention, the reed teeth already described in the method are now mounted such that they form unilaterally open at the top Rietlücken, in which the effect thread on or can dive.

A further feature of the invention is that the guide means is arranged in a plane which extends between the shedding elements and those of two end positions of a stop movement of the reed teeth, which is closer to the shedding elements. This is generally the position of the reeding device with reed teeth during weft insertion. Because of the described arrangement of the guide means in combination with the unilaterally open Rietlücken the weaving machine according to the invention, the production of fabrics with a variety of additional weft effects without disturbing the weft insertion by mechanical elements in the area between reed teeth and fabric edge possible. In this area, no guide means of effect threads dip into the shed formed for the weft insertion through the warp threads.

With the weaving machine according to the invention higher web performances can be achieved in the production of fabrics with additional impact effects, since less consideration must be given to the weft insertion elements in the design of the movement sequence for the guide means. In addition, there is a structure with which further advantageous embodiments are possible.

The guide means are designed needle-shaped with eyelets. According to the invention, one or more guide means are attached at one end to a needle bar. This needle bar, together with a weft direction e.g. prism-shaped linear guide the displacement device, which is fastened together with an electric motor drive as a displacement drive on the front of a heald. The displacement drive can be designed, for example, as a linear drive whose stator is integrated in the frame of the heald or in the prismatic linear guide. However, other drives are conceivable; For example, drives with movement spindles or hydraulic or pneumatic drives that can be controlled by a control device of the loom.

The shedding machine that drives the heald may be, for example, an eccentric machine. In this case, by a rotation between the eccentrics for the basic weave of the warp threads and the eccentrics for effect binding, that is, for the vertical movement of the effect threads, a particularly favorable timing of shedding can be achieved.

However, other conventional shedding machines, e.g. Shank or Jacquard machines possible. Also a combination e.g. from Exzentermaschine for effect binding and a Jaquardmaschine for the plain weave is conceivable. It is also conceivable, the displacement device -z.B. a needle bar with running in the weft direction linear guide - and to store the associated displacement drive in an additional vertical linear guide in the loom and connect with the strands of a jacquard machine such that the vertical movement of the effect threads can be controlled via the Jacquard machine.

The aforementioned embodiments have the advantage that no expensive additional gear, drives or controls must be used for driving the guide means in the vertical direction, because existing shedding elements and shingles drives can be used.

A further embodiment, however, provides that the guide means is vertically driven by one of the shed forming elements by its own independent drive.

Thus, the sequence of movements with respect to timing and with respect to the stroke of the guide means from the top to the lower compartment can be designed freely programmable in an advantageous manner.

In the case of small displacement paths, it would also be conceivable to drive the guide means in the direction of firing via one of the shedding elements, ie together with the sheave. Accordingly, one or more displacement actuators do not directly drive the displacement device, but via the shedding element - e.g. the heald, on the front side of the displacement device is arranged with the guide elements.

The displacement device may in this case contain elements with which a unique positioning of the guide means in the weft direction can be carried out during assembly and adjustment of the loom.

In the context of the invention, an additional advantageous embodiment results in that a plurality of guide means of a displacement device and a

Shift drive can be assigned. It is also possible that a plurality of groups of guide means are present, to each of which a displacement device and a displacement drive are assigned. In addition, each of these groups or even each system of a plurality of such groups may each be connected to a different one of the shedding elements.

With such an arrangement, there is the advantageous possibility to drive these groups or systems of displacement devices and displacement drives in the weft direction in opposite directions and / or with different sized displacement paths. Thus, e.g. mirror image, symmetrical additional firing effects can be achieved.

Since the guide means are in the area between the rear, closer to the shedding elements end position of the reed teeth and the shedding elements, it is obvious if the effect threads, which are generally deducted from a thread supply in the back of the weaving machine, by means of a deflection over the shedding elements are fed to the guide means. In the course between thread supply and deflection and one of the usual Kettfadenwächter - devices for monitoring in case of yarn breakage can be arranged.

For large displacement paths across several Rietlücken away results between the point at which the respective effect thread is tied to the last registered weft thread on the fabric edge and the current, in the weft direction shifted position of the guide means of this effect thread a thread course, the warp threads of the upper shed at an angle crosses. This crossing or diagonal course can cause the effect thread when immersing in a Rietlücke at the upper end of one of the reed teeth, which limit this Rietlücke, gets stuck.

To avoid this, an advantageous embodiment of the invention provides that the reed teeth at their upper end lying at the exit of the Rietlücken one in the warp direction tapered -. wedge-shaped tapering - have material cross-section. The apex of this taper should be near or at the edge of the reed teeth facing the guide means.

The risk that an effect thread gets caught on a reed tooth, is also reduced by a chain in the smallest possible distance between the upper ends of the reed teeth and the tip of the guide means. This distance is selected smaller than 3 mm in an advantageous embodiment; preferred is a distance that is less than 2 mm.

Figur 1a

Schematische Darstellung einer Ausführungsform der erfindungsgemäßen Webmaschine mit Blick in Schussrichtung

Figur 1b

Einzelheit X aus Figur 1 a mit Blick in Schussrichtung und mit Blick in Kettrichtung

Figur 2

Draufsicht der Darstellung gemäß Figur 1

Figur 3

Diagramm der Bewegungsabläufe von Webblatteinrichtung, Fachbildung und Führungsmitteln

Figur 4

Gewebemuster 4.1 - 4.4

Figur 5

ähnlich Figur 1, jedoch in einer Ausführungsform mit unabhängigem Antrieb des Fachbildeelements.

Figur 6

Draufsicht der Ausführung gemäß Figur 5 mit Antrieb der Verschiebeeinrichtung in Schussrichtung über das Fachbildeelement

Figur 7

Anordnung mit zwei Gruppen von Führungsmitteln und Verschiebeeinrichtungen

Figur 8

Draufsicht der Anordnung aus Figur 7, Antrieb der Verschiebeeinrichtungen über verschiedene Fachbildeelemente

Figur 9

Gewebemuster 9.1. - 9.4. , die mit einer Anordnung gemäß den Figuren 7 und 8 erzeugt werden können.

In the following, advantageous embodiments of the invention will be explained in detail with the aid of the figures

FIG. 1a

Schematic representation of an embodiment of the weaving machine according to the invention with a view in the weft direction

FIG. 1b

Detail X off FIG. 1 a with a view in the weft direction and with a view in the warp direction

FIG. 2

Top view of the illustration according to FIG. 1

FIG. 3

Diagram of the movements of rewinder, shedding and management tools

FIG. 4

Tissue pattern 4.1 - 4.4

FIG. 5

similar FIG. 1 but in an embodiment with independent drive of the shed element.

FIG. 6

Top view of the embodiment according to FIG. 5 with drive of the displacement device in the weft direction over the shedding element

FIG. 7

Arrangement with two groups of guide means and displacement devices

FIG. 8

Top view of the arrangement FIG. 7 , Drive the displacement devices on various shedding elements

FIG. 9

Tissue pattern 9.1. - 9.4. provided with an arrangement according to the FIGS. 7 and 8th can be generated.

The FIGS. 1 a, b and 2 show in a partial view a weaving machine with shed drives 9 for driving shed elements 4, by the vertical movement of which a warp shed 1 limited shed 1.1,1.2 is formed. The specialist image drives 9 known to the person skilled in the art may, for example, consist of a group of levers and rods which are arranged below the shed forming elements 4 and which transmit the drive movements of a shed forming machine, not shown outside the machine frame, to the shed forming elements 4. However, any other electromechanical, hydraulic or pneumatic devices can be used as shedding drives 9.

The shed forming elements 4 consist in the present example of known heddles with strands, through the Litzenaugen the warp threads 1 are performed.

Furthermore, the skilled person also known means for entry of a weft thread 3 in the shed 1.1,1.2 in a weft direction 12 are present. These may be devices for mechanical weft insertion by means of wipers or grippers or means for pneumatic weft insertion. In the example in FIG. 2 shown is a device with grippers which are pushed in a known manner via not shown gear and two drive wheels from both sides of the loom in the shed. The weft thread 3 is supplied in this embodiment of a shot coil on a Vorspuler and a color picker 19 one of the two grippers and transferred to the other gripper in the machine center. Of course, the use of different weft threads for different movement cycles is conceivable. The selection and presentation of the weft threads to a gripper, for example, by means of a color selector 19. Such designs are known to the expert for air and rapier.

Furthermore, a Webblatteinrichtung 10,7,7.1 for striking the weft thread 3 to a fabric edge 13 is present, which consists of a Webblattlagerung 10 with reed teeth 7 and a Rietbund 7.1. These reed teeth 7 form between one side upwardly open receiving spaces, so-called Rietlücken 14, so that threads that run in the direction of the warp threads 1 from back to front through the loom, dive from above into these Rietlücken 14 and thus of the reed teeth 7 in the weft direction 12 can be performed.

It is well known to the person skilled in the art that with weft direction 12 both opposing directions which are parallel to the weft insertion direction are meant.

The reed teeth 7 are attached via the reed collar 7.1 to the Webblattlagerung 10 and perform together with this at each cycle of the weaving machine a stop movement 15 - 15.1. Finally, in the present embodiment according to FIG. 1 and 2 a displacement device 5 with a prismatic guide mounted on the frame of the heald, according to FIG. 2 three guide means 11 are mounted, with which three effect threads 2 can be moved in the weft direction 12 by the path A.

By a displacement drive 6, which drives the displacement device 5, different displacement paths A of the effect threads 2 can be predetermined for different movement cycles of the weaving machine. The use of an electromotive, freely programmable linear drive as displacement drive 6 makes sense. It can thus be achieved according to the invention that the displacement path A is freely programmable via a control device 8 of the weaving machine and the displacement drive 6 for each movement cycle of the weaving machine.

In order to be able to position the effect threads vertically above or below the weft thread 3 to be introduced, in the present exemplary embodiment guide means 11, displacement device 5 and displacement drive 6 are connected to one of the shedding elements 4 and are moved vertically together with the latter. The shed forming element 4 is drivable in this case by one of the shingraft drives 9 described above a shedding machine, not shown. Of course, other types of linear mechanical guidance of elements may be provided instead of the prismatic displacement device 5.

Out FIG. 1 is further seen that the guide means 11 is movable in a plane which extends between the shedding elements 4 and those of two end positions of a stop movement 15 - 15.1 of the reed teeth 7, which is closer to the shed forming elements 4; this is the position of reed teeth 7 during weft insertion.

By this arrangement, it follows that in the process sequence according to the invention, the effect threads 2 in the Rietlücken 14 on or can dive out of these and for each cycle of the weaving machine can take another wide specifiable position in the weft direction 12.

In this case, from one cycle of movement to the next, a plurality of score gaps 14 can be swept by the effect threads 2 shifted in the weft direction 12. There are no mechanical elements in the area between the reed teeth 7 and the fabric edge 13 available for the leadership of the effect threads 2, so that the weft insertion can proceed undisturbed. In the event that the weft insertion is to take place pneumatically, it is also readily possible to form the front of the reed teeth 7 in a channel-shaped manner in a known manner to allow the transport of the weft thread 3 through this channel by means of air jet. Another aspect of the described embodiment of the invention is that for each movement cycle of the weaving machine can be specified by means of a mechanical or an electronic binding cartridge, whether the guide means 11 with the effect thread 2 during the weft insertion above (in the upper compartment) or below (in the lower compartment) of the weft thread 3 to be entered. A mechanical binding cartridge can consist of a suitable choice of eccentrics of a drive mechanism - eg an eccentric machine - or in a punched card a card-controlled dobby. Modern shedding machines are known to be controlled by electronically generated and stored in the control device 8 of the loom pattern data. Together with a preprogrammed in the control device 8 individual displacement A of the effect yarn 2, which is made between the change of the effect yarn 2 from the upper to the lower shed, most different bonding pattern of the additional impact effects can be achieved. It is known to the person skilled in the art to also store further information for each movement cycle of the loom in such a mechanical or electronic binding cartridge. These include, for example, the selection and presentation of one or more weft threads by means of a so-called color selector 19, the weft density, the warp tension and the speed of the weaving machine. Special effects are also possible in that no weft thread 3 is selected and entered in a movement cycle (see Tissue Pattern Fig. 4.1 .).

The FIGS. 1 A and 2 also show that the effect threads 2 are withdrawn from a thread supply 16 in the region of the rear side of the weaving machine and fed to the guide means 11 by means of a deflection device 17 via the shedding elements 4. To maintain the thread tension optionally a resilient element in the thread path can be arranged. In this area, the arrangement of a thread monitor, not shown, makes sense, which turns off the loom when breaking an effect thread 2.

The FIGS. 1a . b show guide means 11 which are in the form of needles with eyelets 18 and a needle point. One or more of these needles are attached at one end to a needle bar. This needle bar forms the displacement device 5 together with a linear guide.

The needle-shaped guide means 11 and 11.2 also have suture eyelets 18 with round 18, oval 18.2 or not shown slot-shaped opening through which the effect threads 2 are guided.

The different opening shapes allow adaptation to different cross sections of the effect threads 2 used. Fine or coarse fibers or filament yarns in the range from 11 tex to 10 000 tex can be used. The use of electrically conductive threads or optical fibers as the effect thread 2 is conceivable, which still a wealth of other effects can be generated with such fabrics.

In the FIG. 1b it can be seen that the needle-shaped guide means 11 extends wedge-shaped in the region of a tip facing the warp threads 1; However, a conical tip is also conceivable. The cone-shaped or tapering region begins at a distance C from the thread eyelet 18.

In FIG. 1b is also visible that the upper ends of the reed teeth 7 in the vertical direction have a distance D from the warp threads of the upper compartment 1.1 at the point at which the guide means 11 crosses the warp threads of the upper compartment 1.1 in its vertical movement.

Finally, it can be seen that between the upper ends of the reed teeth 7 and the plane of movement, in which the guide means 11 are moved, in the warp direction is a distance E - not drawn to scale.

The distances C, D and E depend on the warp density and the cross-section of the effect threads 2 used. In the present embodiment, C is chosen to be greater than or equal to D.

In order to prevent the above-described snagging diagonal effect threads 2 when immersed in a Rietlücke 14, the distance E should be as small as just allow the dimensions of the elements involved and the precision of the stop motion 15- 15.1 without collision.

To avoid this getting stuck also serves that the reed teeth 7 at its upper end at the exit of the Rietlücke 14 have a tapered in the warp direction material cross-section, as shown in detail X. FIG. 3 shows diagrammatically the movements of some elements of a loom, which performs the method according to the invention. Shown are two cycles of movement of the loom over a total of 720 angular degrees Y of a weaving machine main shaft.

The curves F show the stroke of two opposing shedding elements 4, each of which moves a bevy of warp threads into the upper shed 1.1 or lower shed 1.2. The weft insertion, not shown in the diagram, takes place in the phase in which the shed 1.1,1.2 is open. The curve H represents the stroke of a guide means 11. This is also the stroke which is performed by the shedding element 4, with which the guide means 11 is moved vertically. In the prior art it is known that shedding machine and shingles 9 are designed so that for each shed 4 individually the vertical position in the loom and the size of the stroke H and F can be adjusted. As described above, in certain embodiments of the shed forming machine, the timing between the movements F and H and the movement Y of the loom by the operator in the direction of travel can also be shifted individually. With 15 -15.1 the stop movement of the Webblatteinrichtung 10,7,7.1 is designated, which takes place between two weft entries.

The Figures 4.1 to 4.4 , show various fabric patterns with additional weft effects, preferably with the embodiments of the loom according to the invention according to the FIGS. 1 and 2 can be produced.

FIG. 5 shows a loom with all the features of FIGS. 1 and 2 in which, however, the device for vertical movement of the guide means 11 is formed by a shedding element 4, which is driven by its own independent drive 9.5. For this purpose, any known to the expert electromechanical, pneumatic or hydraulic drives can be used.

In the presentation of the FIG. 5 also missing in the FIG. 1 shown prism guide as part of the displacement device 5 on the frame of the heald, since the displacement device 5 is not moved directly in this illustration by a linear drive, but on the shedding element, eg a heald in the weft direction.

FIG. 6 shows the execution according to FIG. 5 in a plan view, in which it can be seen that the displacement device 5 via the shedding element 4 by means of a Displacement drive 6.6 in the weft direction 12 is driven. In this case, the displacement drive 6.6 can be mounted on the machine frame. The compartmentalized element 4 - in the present case a weaving shank - is displaced in the weft direction together with the displacement devices 5 mounted thereon.

The FIGS. 7 and 8th show an embodiment according to FIG. 6 , but with two groups of guide means 11, 11.7 shifting devices 5, 5.7 and displacement drives 6.6, 6.7, wherein each of the groups is connected to another of the shedding elements 4. The planes in which each group of guide means moves can be arranged one behind the other in the warp direction so that the respective guide means 11 of one group can be moved unhindered by the guide means 11.7 of another group in the weft direction 12.

It can also be several such groups with the same shedding element 4 to a system of guide means 11, 11.7. be connected so that all guide means 11 of this system are moved vertically synchronously.

Finally, several such systems can be connected to different shedding elements 4 in each case and thus be driven vertically independently of one another.

About a corresponding specification for the displacement drives 6 and 6.7 can be achieved with such an arrangement also different displacement paths A and B for the groups or systems of guide means 11,11.7.

The distance E in this case refers to the foremost, the reed teeth 7 nearest level of movement.

However, the groups of guide means 11, 11.7 can also be so arranged offset in the weft direction that all guide means 11, 11.7 in the same plane between shedding means 4 and rear end position of the stop movement 15 - move 15.1 (not shown).

The possibility of driving these groups in directions opposite one another, if necessary also with different displacement paths A and B, makes it possible to achieve mirror-image, symmetrical or asymmetrical additional shot effects or entire fabric structures, as exemplified in US Pat Figures 9.1. to 9.4 are shown.

reference numeral

0

tissue

1

warp

1.1

Shed, upper shed

1.2

Shed, lower shed

2

effect thread

3

weft

4

Shedding elements

5,5.7

shifter

6, 6.6, 6.7

displacement drive

7

Webblattzähne

7.1

Riet Bund

8th

control device

9

Shedding drive

9.5

Independent drive

10

Webblattlagerung

11, 11.2, 11.7

guide means

12

weft direction

13

fabric edge

14

Riet gaps

15, 15.1

stop motion

16

yarn supply

17

deflecting

18, 18.2

eyelet

19

color Picker

A

Displacement group 5

B

Displacement group 5.7

C

Distance needle point

D

Distance weaving ends

e

Distance movement plane

F

Hub shedding elements

H

Hub guide means

Y

Weaving angle degrees

Claims (4)

1. Power loom with shedding motion elements (4) and shedding motion drives (9) by which the shedding motion elements (4) can be vertically driven, such that a shed (1.1, 1.2) delimited by warp threads (1) can be formed, as well as means to insert a weft (3) into the shed (1.1, 1.2) in a weft direction (12) with a weaving reed device (10, 7, 7.1) for beat up the weft (3) to the edge of a piece of fabric (13) by means of a beat up motion (15, 15.1) having two endpoints and with a displacement drive (6) driving a displacement device (5) in the weft direction (12),
   and a guiding (11) with which the effect yarn can be displaced in the weft direction (12) and vertically positioned, the guiding (11) being needle-shaped and having an eyelet (18),
   and whereby different displacements (A) of the effect yarn (2) in the weft direction (12) for different cycles of the power loom can be specified by the displacement drive (6); and with a shedding motion element (4) by which the guiding (11) can be vertically driven through one of the shedding motion drives (9) of a shedding machine
   or by an own independent drive (9.5), and with weaving reed dents (7) attached to the weaving reed device (10, 7, 7.1) unilaterally forming open reed interstices (14) in an upward direction in which the effect yarn (2) can be inserted and removed, whereby the guiding (11) is arranged on a plane between the shedding motion elements (4) and those of two endpoints of a beat up movement (15, 15.1) of the weaving reed dents (7) that lies closer to the shedding motion elements,
   characterised in that
   the guiding (11) is fastened on one end to a needle board, and that the needle board, together with a linear guide in the direction of the weft (12), forms the displacement device (5), which is fastened jointly with an electromotive drive or a pneumatic drive that can be controlled by a control device (8) of the power loom as the displacement drive (6) on the front of a shedding motion element (4) that is formed as a heald frame.
2. Power loom according to claim 1, characterised in that the guiding (11) is configured such that, in the area below the eyelet (18), it has a wedge-shaped or conical tip facing the warp threads (1), which assists in ensuring that, in the event of a vertical motion, the guiding (11) pushes the base warp threads (1) so far apart that neighbouring warp threads (1) each form a passage for the effect yarn (2) upon its insertion into a reed interstice (14).
3. Power loom according to claim 1 or 2, characterised in that the weaving reed dents (7) have in the direction of their upper end at the exit of the reed interstice (14) a cross-section tapering off in the direction of the warp, the tip of this tapering being arranged close to or on the edge of the weaving reed dents (7) facing the shedding motion elements (4).
4. Power loom according to any of claims 1 - 3, characterised in that the distance (E) in the warp direction between the upper ends of the weaving reed dents (7) and the tip of the guiding (11) is less than 3 mm.

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