DE2314158A1 - METHOD AND DEVICE FOR MANUFACTURING TUFTED TEXTILES - Google Patents

Description

nn. O. Γ> ΓΓΓΜΛΝΓ> ί

K. L. SHIP

«.A.V.füNER

domino. P. STRBHL. £ O I 4 »| $ 0

m. U. SCHUBELHOPF

DtPL. dwj. D. EBBINGHAUS ^ _-6 mOwchi ^ N OO

MARIAtIILPPLATZ 3 * 3 PatbntanwAlTB. TEI.EFON (0Θ11) 43 83 54

_M Munich «. POST BOX «.ο.βο TBLKGR. AUBOMAi.cPAT Munich Abrara iTathaniel Spanel _TBLÖX ^ ₂₃₈₁₁₁ , Our file DA-KlO49 (M-4O7)

March 21, 1973

KLS / JL

Method and device for producing tufted textiles

The invention relates to a method and device for producing tufted textiles such as blankets and carpets o. The like., In which a pneumatic pressure is used to transport strands of yarn through channels in order to them in a loading position opposite for fastening to bring from yarn sections serving elements, in advance of sections separated from the yarn strands through the elements are introduced into a base layer in such a way that they form tufts.

A pneumatic system is known from the American reissue patent 27 164, in which strands of yarn and / or separate yarn sections are pneumatically transported to a loading station, where they are transported from Fasteners are introduced into a base course. Thereby the possibility to choose the yarn given from a variety of colors by a magazine. This turns every channel through the yarn to the elements is transported in its charging station, a variety of colors are offered.

An alternative to the specified system results from the American patent 3,554,147 (patent from Spanel et al.), Which makes it possible to simultaneously select yarn sections of different colors for each tufting cycle at each individual needle station. This is achieved by feeding yarn from as many different colored sources as are desired through channels which open into a common channel adjacent to the loading station. The possibility

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shown the possibility of cutting off a section of yarn before, during or after threading it into the above-mentioned elements, as well as before or during tufting. Since the cutting can take place in the immediate vicinity of the loading station after a certain strand of yarn has been introduced into the common channel, this patent specification shows a retraction device for optionally withdrawing the strand of yarn from the common channel leading to the loading station when a color change is desired .

In this known device it is disadvantageous that at the points where the strands of yarn in sections be cut, the channels leading to the strands of yarn must have openings to the cutting le admit ment. However, these openings mean a pressure loss within the pneumatic system, which occurs constantly during the transport of the yarn strands in the channels. In addition, is with the known Device no possibility available to produce yarn sections of different lengths.

Devices have also become known (US Pat. Nos. 3,216,387, 3,217,675 and 3,386,4o3, Joe T. Short) which are not able to change colors by changing the yarn strands before each tufting cycle, i.e. multicolored to work. In addition, the cutting takes place in a manner deviating from that described above.

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U.S. Patent 3,389,667 (Mueller patent) eats disclosed that the yarn is transported under the action of a positive pressure through hollow needles, which the used in the Short patents and differentiated from the needles of the Spanel patent which are not hollow and in which the thread is passed in the transverse direction through the eye of a needle will. According to the Mueller petitioner, the yarn is cut while it is still in the tube-like hollow needles and furthermore, the iiiueller patent does not describe any devices which serve to alleviate losses to prevent pneumatic pressure at the cutting station.

The concept of U.S. Patent 3,595,186 (Stanley-Shorrock patent) is essentially the same as that of the Short and Mueller patents so that the Shorrock, Mueller and Short patents differ from the Spanel patents in this respect else differ in a similar V /, as according to the Shorrock patent also hollow needles are used, whereas used after Spanel Patent and according to the US Patent of Spanel and other needles, which obviously are not hollow, and in which also the yarn is passed in the transverse direction through the eye of a needle.

also, as illustrated, the Shorrock patent relies on the use of a combination of mechanical and pneumatic delivery devices, while the Spanel et al. patent makes use of only pneumatic delivery devices. ·

Also, according to the Shorrock patent, lengths of yarn of uniform length are used, and that Shorrock patent does not disclose the possibility of yarn off

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Cut variable length cuts as shown in the In contrast, it is clearly taught by Spanel in the present patent application.

Thus, it is desirable to provide an integrated, highly functional system that enables each to bring a separate yarn section opposite a tufting element into a loading layer, and at which measures have been taken to cut off a section of yarn from the yarn with the help of a cutting blade, that to some extent? automatically re-sharpened and works very reliably, to further improve its effectiveness of the pneumatic device while inserting such a cutting element, the is also adjustable to allow the cutting of yarn sections of different lengths, and to improve the efficiency of the pneumatic device at the needle station and at the same time facilities provide that make it possible to positively control the yarn before and after the tufting process.

The invention is therefore based on the object of creating a tufting machine in which there are yarn guide channels which are essentially pressure-tight during the yarn transport, but allow the yarn to be cut with the aid of a cutting element while it is in the channels, see above that individual yarn sections arise that are in a threading position. Furthermore, a tufting machine has been created by the invention, in which it is possible to maintain the effectiveness of the pneumatic device, while in addition there is the possibility of controlling the cutting device so that yarn sections of different lengths are produced so as to facilitate the production of carpets To enable tufts of different heights, in which the base fabric or support material is also moved onto such a V. ei se, äeP. d.the effectiveness of the pneumatic yarn delivery device

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improved, and in the case of the schlicülicr. an improved facility is present that allows the movement of the yarn sections both before and after the tufting process inevitably steer.

To achieve the stated object, the invention creates a pneumatic tufting machine in which the yarn is transported through channels under pneumatic pressure and, while it is in the channels, can be cut through with the aid of a device in which gaps present in the channels are kept closed during yarn transport in order to prevent the pneumatic pressure from being lost and in which these gaps can be opened to make them accessible to the cutting element. In one embodiment, the gap is formed by an axially reciprocable portion of the yarn channel assembly to provide access openings to allow the cutting element to be momentarily moved across the yarn channels to cut the yarn into individual sections. After ^{λ <ι} γ completion of the cutting process and after the cutting element has been withdrawn, the reciprocating part of the channel closes the access opening for the cutting element, whereupon the pneumatic device is again ready to transport the yarn along a distance equal to the length which corresponds to the next yarn sections to be produced. Both the cutting element and the reciprocating part of the channel are adjustable so that it is possible with the tufting machine to produce yarn sections of different lengths. In order to ensure continuous operation with minimal downtime, it is necessary to use a durable cutting element with a long service life, and in view of this requirement there is a self-resharpening device with a kerf and an anvil. After the yarn has been cut into individual sections, the further inevitable control at each threading station is carried out by a clamping device.

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keep right.

The turbulence of the compressed air within the facility is also reduced by the special way in which the carrier material moves to the air handling machine. The institution that comes into effect here; is also designed in such a way that the thread that has already been needled is not during the next tufting stroke is impaled.

The invention and advantageous details of the invention are in the following on the basis of schematic drawings explained in more detail using exemplary embodiments. It shows:

Fig. 1 is a schematic side view of an embodiment a tufting machine;

1A shows an enlarged longitudinal section through a modified embodiment of part of the tufting machine according to Fig. 1;

Fig. 2 is a partially sectioned perspective view of the loading station for the tufting elements, the position being shown in which the gap for receiving the cutting element is opened is;

FIG. 3 shows a bar position similar to FIG. 2, in which however, the gap for receiving the cutting element is closed;

4 shows a longitudinal section through the loading station for the tufting elements, in which it is shown that a section of yarn of the desired length has been brought into the loading position and clamped;

Fig. 5 in a Hg. 4- similar longitudinal section Station for loading the tufting elements during the cutting of the yarn;

Fig. 6 the position of the station for .Beschicken the tufting elements in the event that the 'X' tufting needles

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brought to its lowest position and a section of yarn has been introduced into the base course;

7 shows a partial section through the loading station the tufting elements, from which it can be seen in which way the component carrying the comb begins, to perform its backward movement in relation to the tufting station ;

FIG. 8 shows, in a partial section corresponding to FIG a hop support rod has been guided;

FIG. 9 shows a partial section similar to FIG. 8, according to which, however, the tufted knobs are pushed through the holding rod in FIG their position is held, while the aainmträger after moved forward, also showing the movement of the support fabric into the next tufting position;

9A shows a partial section similar to FIG. 9, in which however, a modified knobbed retaining bar is shown;

10 shows a longitudinal section through the station for loading the tufting elements, from which it can be seen that the cutting device is modified so that it is possible to adjust the length of the individual yarn sections Need to enlarge; and

11 is a perspective partial representation of the station for loading the tufting elements, in which a other device for adjusting the knife, and Anvil assembly is shown.

The tufting machine according to the invention shown in FIG. 1 essentially includes a creel with three bobbins, which consist of different colored yarns, a yarn metering device 12, a device for merging the yarns, a cutting station with a kesser 30 and an anvil 36, an axial "back and forth moveable channel section 34 »a loading or

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Needle station 20, a device 24 for generating a negative pressure as well as a tuft-nub guide device "or a comb 52. The tufting machine is controlled by an eccentric shaft, indicated by dashed lines 25 and 25 * in FIG In the tufting machine, the yarn withdrawn from the creel 10 is passed through the metering device 12, which in each case allows a yarn section of a predetermined length to reach the device 16 for merging the yarns, so that the relevant Gernabschnitt under the knife 30 is fed to the -keschickungsstation 20 At the loading station, the needles 22 according to FIG the loading station are aligned so there The yarns fed to the feed station are threaded into the needles 22. The metering device 12 works in the manner that the movement of the yarn to the loading station 20 is limited so that the portion of each yarn protruding to the right beyond the knife 30 according to FIG. 1 is given a predetermined length. Once the yarn assumes the desired position on the .Beschickungsstation 20, M moves according to FIG. Clamping means 56 downwardly to each longitudinal movement to prevent the ^ arnäbschnitts after cutting. The anal section 34 is then moved to the left by a pivot arm 47 as shown in FIG. 5, whereupon the knife 30 is moved downwards in the direction of the anvil 36 in order to cut the yarn the left side of the blade 30 existing yarn withdrawn by a device 12Y of the metering device 12 into the device 16 for merging the sheaf. This retraction of the yarn in the device 16 makes it possible as needed, beirr, i ^ 'achczen Tuftingarbeitsspiel on a yarn with a to pass another iarbe.

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The one on the right side of the knife ^ O Yarn that has been cut from the supplied yarn is shown in FIG. 6 with the help of needles 22 through the Carrying material B is pulled through to form a tuft, and here, according to FIGS. 7 and 8, there is a knob holding device 62 to act to clear the path of the needles 22 for their next upward movement.

According to Fig. 1, the creel 10 includes three coils 10E, 1GW and 1CB, one of which is red and white, for example and blue thread can be fed. Although FIG. 1 shows only three different colored yarns, it is according to FIG Invention possible to supply any number of other yarns with other colors.

The yarn strands E, Vi and B become the metering device 12, the plurality of brakes 12A, 12B and 12C and devices 12X and 12Y for drawing down yarns having.

The device 12Y is shown in FIG. 1 in its lowest position, in which the brakes 12A and 12C are closed while the brake 12B is open. As it moved down, device 12Y could be seen from the left pull to the right without being hindered by the open brake 12B, but it could not get any yarn from the Pull off the creel 10 because the brake 12A was closed, and also could not thread from right to left pull because the brake 12C was closed. Thus the yarn loops exist, which are made with the help of the second drawing station of the drawing device 12Y, as yarn temporarily stored at the first drawing station 12X, and these yarn loops are available for processing as soon as the still-closed brake 12C is released will.

Thus, by releasing the brake 12C, a portion of each desired thread length can be made available at a time. After removing one of the desired length

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The remainder of the yarn section can be used as shown in Fig. be dragged to the left; at this wake the brake becomes 12B closed and the pulling device 12Y actuated. Thus, the device for dosing and dispensing of Yarn the possibility of feeding both yarn and part of the yarn to the tufting machine. the zone 34- to withdraw with the pneumatic channels 18. Further Details of this yarn delivery device can be found in U.S. Patent 3,554,147.

Referring to Fig. 1, there is a tube 16R for each bobbin of thread or 16W or /. 16B is present, and all these tubes lead to the device 16 for merging the yarns; the Channels or tubes of the device 16 open into a common channel 18 through which the yarn of the Kadelbeschikkungsstation 20 is supplied.

In a preferred embodiment, the negative pressure for transporting the yarn strands from the metering device 12 via the ZnTnerführungeinrJchtur.g to the loading station 20 by a device 24, such as a suction fan, generated on the side facing away from the yarn delivery device the ^ eSchangungsstation 20 is arranged and serves to apply a negative pressure to each channel 18. According to the invention, however, it is also possible to work with an overpressure or with both an overpressure and a negative pressure in order to transport the yarn. If, according to FIGS. 2 and 3, the double needles 22-22, 22'- ^22f and 22 "-22 ^{fl are} in their receiving or Linfädelstellung, the holes of each Kadelpoars are in line with the associated delivery channel 18, as shown in Fig 2 is shown with respect to the holes 27 of the pair of needles 22-22.

The two rows forming needles 22 are firmly built into a needle bar 23 as shown in FIG an eccentric 28 which can be driven vertically by the shaft 25 'according to FIG. 1 and can be ebbev / erbar. The liadelbarre 23 and its actuation device are of a known type.

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To the device for transporting the carrier material According to FIG. 1, B includes a supply roll 31 »a Ural swivel roll 33 and a transport roller 34. According to FIG. 1, a ratchet wheel and pawl assembly 36 can be used to move the To rotate the transport roller 34- intermittently so that the Carrying material is transported while it is provided with tufts by the up and down needles 22.

According to Fig. 1, an I / .otor 70 is present, which all Drives parts of the machine via a power transmission device, which is a gear train, a Timer chain or the like can act. According to FIG. 1, the metering device 12 is actuated by the shaft 25. With the help of clock pulses, which are indicated by a in Fig. 1 schematically indicated device 71 are generated is it is thus possible to supply the feed station 20 with the yarns according to a desired pattern, as with See U.S. Code 3 55 ^ 14-7 for further details is described.

In Fig. 2 it is shown in which way yarns are fed to three of the numerous loading stations, which form a row that extends over the entire width of the tufting machine. The cutting element or Knife 30 'actuated from shaft 25 according to FIG is, protrudes somewhat in Fig. 2 into a slot 32 which extends between a channel section 34 and one of the Loading station associated channel section 35 extends; the feed channels 18 extend in the Longitudinal direction through the two channel sections. 34 and 35 The anvil 36 associated with the knife 30 extends partially over the underside of the channel section 3 ^, he protrudes into the slot or gap 32, and in the gap it is in alignment with the knife 30. The channel section 3 ^ "to which an upper wall 36" a lower wall 4-0 and sidewalls 42 are part of a whole Shaft 44 moved back and forth, with which a swivel arm 46 is rotatably connected, which is in the channel section

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34 built-in pin 48 cooperates. According to FIG. 1, this device, designated as a whole by 47, is carried out the shaft 25 is actuated. According to the invention, the gap 32 could also be a different cutting device instead of the knife 3G record, e.g. a cutting device with oscillating movements or a laser cutting device.

About an axial movement of the channel section 34 is to be made possible according to FIG. 1 on each channel 18 a flexible hose 37 is connected, which is essentially stretched as long as the gap 32 is closed, and which relaxes or flexes as soon as the anal section 34- before the advancement of the knife 30 opposite the channel section 35 is withdrawn. A modified embodiment of one of the flexible hoses 37 corresponding The arrangement is shown in Figure 1A and in this arrangement each flexible tube is through two Telescopically cooperating components 37A and 37B is replaced. The channel section 34 can also be used here are shifted, wherein the component 37a is inserted further into the component 37B. In contrast to Fig. 2 and the The following figures are each yarn over its entire length in guide tubes or channels to which the Feed device 16 belongs, also the channels 18 connected to it by the flexible hoses 37, which are located through the reciprocable channel section 34 and channel section 35 of the loading station. from the time at which the yarn enters the tubes 16R, 16V / and 16B of the gathering device 16, up to by the time the yarn is fed to the channel section 35, the yarn is under the action of pneumatic pressure. As an alternative to the flexible hoses 37, which move the anal section back and forth 34 enable one can use the shown in Fig, IA, telescopically cooperating tubes 37A and 37B provide so that the effective length of the thread guide channels can be enlarged or reduced while

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the channel section 34 is reciprocated.

According to FIG. 2, rollers 50 and 51 are present which serve to guide the carrier material B into the vicinity of the needles 22. Between the guide rollers 50 and 51 for support of the support material B is a with openings 53 for • take the needles 22 provided, reciprocating comb 52 arranged by column parts, not shown can be supported. The comb 52 is used to the tufted yarn according to FIG. 7 with the help of a one component of the comb-forming rail 60 to the right as soon as the comb moves to the right, around the tufts on a vise to be explained behind a knobbed post 62 hold tight. According to FIG. 1, the comb 52 is actuated by the ytelle 25 '. The guide rollers 50 and 51 could be replaced by a guide plate (not shown) or some other guide device according to Fig. 1 could protrude from a frame part 49 and would also serve to support the support material B in the area of Lifting needles. According to Fig. 2, the lower Wanf. 54 of the channel section 35 is not between the double needles 22 extend through, because the space between the threads must be kept free so that a section of yarn can be accommodated can that is to be drawn into the support fabric E to form a tuft. The gap in the lower wall 54 must therefore be kept as small as possible so that the Effect of the pneumatic pressure is not impaired by the creation of turbulence, through which the proper Feeding the yarns could be disrupted. According to Fig. 1, clamping devices 56 are present, - which serve to to hold a section of yarn in its position after it has been cut with the aid of the kettle 30 although the yarn section is still exposed to the pneumatic pressure. According to Fig. 1, the clamping devices 56 actuated by the V / elle 25. To the efficiency To increase the pneumatic device further, are between the needles 22 and the ¥ * ends of the loading station Maintain the smallest possible tolerances

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hold to prevent turbulent air currents. The yarn is fed to the feed station 35 only while the needles 22 are in their receiving position according to FIG . Pinholes 27 essentially correspond to the cross section of the channels 18.

In Fig. 3 the gap 32 for receiving the knife 30 has been closed, ie the lianal section 34- has been moved axially in order to bring it into contact with the duct section 35, and thereafter the system for preparing the _{yarn feeding process remains} closed.

When the tufting machine is in operation, a strand of yarn of the desired color is selected with the aid of a method for generating output signals in accordance with a predetermined pattern, as is described, for example, in the above-mentioned USA patents. Each strand of yarn is moved with respect to the metering device Ί2 by pneumatic pressure, either by means of an overpressure or a negative pressure or a combination of an overpressure with a negative pressure. The pneumatic pressure causes the thread strand in question to be guided through the associated needle holes 27, as shown in FIG. 4; In this case, the length of each yarn section is determined by the metering device 12 set accordingly beforehand, so that the loading station 35 has a yarn section which, after it has been cut from the relevant yarn strand, has the desired length. Before the cutting operation is carried out, the clamping device 56 must move downwards according to FIG. 4 in order to clamp the yarn in the manner shown. This arrangement is necessary so that the yarn section is not influenced at this point in time by the pneumatic pressure, which can constantly be effectively maintained. It can be seen that the carndo screening device: 12 enables the relevant yarn section to be cleared in this way.

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give that equally long parts of the yarn section according to FIG. 4 from the right end of the yarn section to the Tufting needle on the right side as well as from the left Extend tufting needle to cutter. This is necessary when both legs of each tuft knot the should have the same length.

As soon as the yarn section is in the desired position is located, the reciprocable KanaJLabschnitt 34-according to Fig. 5 moved to the left to open the gap 32 and the better 30 is moved down in the gap, until it comes to rest on the anvil 36 arranged below, as shown in FIG. Thus, the yarn becomes functional severed, so that a yarn section is formed which is threaded into the associated tufting needles.

If the needles 22 move down from their position according to FIG. 5, they pull the yarn section downwards through the carrier material B, so that a tufted nub incorporated into the carrier material arises from the yarn section, such as it is shown in FIG. At this point the knife 30 can be returned to its upper position, and the reciprocating channel section 3 ^ can move right to close gap 32 and such prepare for the next work cycle. As soon as the needles 22 have released the yarn in the manner shown in FIG one work cycle for forming a pile is over. In this position, the legs protrude Tile nubs through the openings 53 between the teeth 52 'of the comb 52, which can be seen in FIGS. 2 and 3, downwards, wherein the comb helps to support the carrier material B.

7, the comb 52 moves to the right, so that the rail section 60 of the comb comes to rest on the legs of the tuft in question.

Fig. 8 shows that both legs of the tuft shown by the rail section 6C of the comb 52

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Side of the H

has been moved to the right side of the hopping support rod 62 are, which are arranged in a stationary manner below the needle station and opposite to it is offset to the right. As soon as the comb 52 reaches its extreme position on the right side the clamping device 56 is released.

According to FIG. 9, the Esmm 52 then moves down to the left, while the legs of the previously formed tuft on the right side of the knob holding bar 62 remain. At this point in time, the substance E is added right transported to the next tufting work game prepare. The needles 22 move upwards into their loading position as soon as the comb 52 according to FIG. has reached its position indicated by dashed lines on the left-hand side, and the support material B becomes moved as far to the right as needed to complete the next tufting or pile work game is. The needles now return to their loading position according to FIG. 3, whereupon the next yarn section can be fed. Fig. 9A shows a modified one Arrangement in which the above-described knob holding rod 62 by a holding device 62A is replaced with a wedge-shaped cross-section.

After a section of yarn has been severed in preparation for the next pile formation work cycle, the next thread color using the thread color selection method of the aforementioned U.S. Patent 3,554,147 selected, and if a Gern with a different color is to be processed, the strand of yarn that is in This instant according to FIG. 1 is located in the common channel, and from which a section has just been separated is withdrawn by the retraction device 12Y at least so far that the common channel 18 is cleared and then the skein of yarn with the other color now selected is transferred to the needle loading station the channel 18 is supplied.

The tufting machine described above enables it to produce cut pile carpets in which

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the height of the pile depends approximately on the distance along which each section of yarn on both sides of the Needles 22 protruding from the needles; if the legs of the tufts should have the same height, it is ensured that that the yarn sections protrude equally far outward on both sides with respect to the needles. The machine However, it can also be adjusted so that a carpet is created in which every stroke of the needle causes a head with a short and a long leg is formed; For this purpose, the yarn metering device Ί2 can be set so that that it provides yarn sections which protrude beyond the needles 22 along a distance which is greater than the distance between the boiler 30 and the neighboring one Needle.

It is also possible to set the tufting machine so that it has tufts with a different height generated. According to FIG. 10, the knife 30 can be adjusted to the left with the aid of an adjusting device 75. In connection with this, a device 76 for adjusting the anvil 36 is present. According to Fig. these facilities expose themselves in a simple manner ^ Screws and adjustable blocks together, but they could also use the devices working with screws 77 and 78 which, according to FIG. 11, are assigned to the knife 30 or the anvil 3ö. According to FIGS. 10 and 11 must the movable channel section or block 34 so adjusted be that it moves further to the left so that a wider knife receiving gap 32 is formed so that the Contact point between the knife 30 and the anvil from the loading section 35 is further away. on In this way, the distance between the knife and the needles 22 can be increased, and the yarn metering device can be used Set 12 so that it delivers an amount of thread sufficient to produce a corresponding Extension of the yarn section on that of the feed device averted iüeite the IJadeln to effect. In this way it is possible to have a carpet

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to produce a higher pile.

• According to Fig. 11 , a screw 77 is screwed into an A set block 80 which has a base portion 82 which is in a matching groove 81 of the knife. 30 is introduced so that the kesser can be moved vertically up and down . This movement of the knife can be brought about according to FIG. 1 from the shaft 25 with the aid of a rod 83 and an adjusting block 84 which is connected to the knife by a base section 65 and is designed so that the knife 30 extends in the longitudinal direction can move. Thus, the knife 30 moves vertically up and down in the gap 32, which interrupts the channels 18, and the Liesser can be adjusted in the lateral direction with the aid of the screw 77 , which is connected to an actuating device (not shown) and which serves the To regulate the height of the pile. A similar device 78 is used according to FIG. 11 to adjust the anvil 36 in the lateral direction.

As described in U.S. Reissue Patent Specification 27,165, the tufting machine of the present invention can be modified to allow the sections of yarn to be attached with an adhesive. To keep the air losses as small as possible, you can here use a type sealing butterfly valve as the USAPatentschrift new members is described in FIGS. 23A and 23B.

In a further embodiment of the invention, as shown in FIG. 1, there are knives 90 which are arranged at a distance from the needle loading station 20 and which can be actuated from the shaft 25 by eccentrics. Since, in this embodiment, the yarn is divided into sections before it is threaded into the needles, in order then to be pneumatically transported to the loading station, it is expedient to provide stops , not shown, which serve to prevent the movement of each

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Of thread in the hole of the associated needle, as described in the referenced U.S. reissue patent is described. Furthermore, it is intended according to the invention that it is also possible to use the cutting process to be carried out during the threading process; this would result in greater leeway with regard to the choice of yarn sections of different lengths. In the case of a machine with appropriately synchronized parts the beginning end of the strand to be cut are in front of the cutting station when the gap 32 to Picking up the knife is opened, so that the yarn transport through the opening of the gap is not in one too would be affected to a great extent.

Expectations

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Claims (1)

EXPECTATIONS 1. Process for the manufacture of tufted textiles, at a pneumatic pressure is used for this, thread strands through To transport channels to them in a loading position opposite to the fastening of yarn sections serving Bring elements, whereupon sections separated from the yarn strands by the elements so in a base layer are introduced that they form tufts, characterized in that the severing of the Yarn strands into individual sections is effected in that a first part of each of the channels opposite a second Part of the channel in question is moved so that between the first and the second part of each channel a channel The opening making accessible arises that a cutting element is advanced through each of the openings is used to cut the strands of yarn to dux so that in each one Channel a separate yarn section remains, and that the first part of each channel opposite the second part so is moved so that the opening is closed again in order to effect the pneumatic pressure or an air flow to bring so that the strands of yarn are transported along a distance which is the length of the yarn sections of the corresponds to the next sentence. 2. The method according to claim 1, characterized in that the or each strand of yarn in its Loading layer is clamped before it is cut through. 5. Tufting machine, which is used to provide a support fabric with tufts that can be moved up and down Tufting needles (22) are present, which pass through the carrier material in direction to a threading station and can be moved away from it, in the case of pneumatic yarn 309841/0417 Transport facilities are available that extend transversely to the tufting needles and make it possible in the Tufting needles in the transverse direction repeatedly thread strands of yarn when the tufting needles are repeatedly in their The threading position is brought in, in which the pneumatic yarn transport device includes channels through which through yarn strands are fed, in which near the threading station a device for severing the Strands of yarn is arranged, and in which a device is present which serves to the tufting needles operate that they attach yarn sections to form tufts on the carrier fabric by going through move the carrier material through until each needle has formed a tuft, characterized in that, that two parts of each individual channel (18) can be separated from one another in order to create an opening (32) or to close the opening again that the device (30) for severing the strands of yarn (R, W, B) through the Openings can be moved through which arise when the two parts of each individual channel are separated, and that these Device can be actuated repeatedly to cut through the strands of yarn each time they are in the tufting needles (22) have been threaded to form sections of yarn 4-, tufting machine according to claim 3 »characterized in that the path along which a part of each individual channel (18) is movable, adjustable, so that the channels are accessible Let openings (32) form along the channels, and that the device (30) for severing the strands of yarn relative to the openings is adjustable to allow the strands of yarn along the openings cut through various points in order to allow the formation of yarn sections of variably selected length enable. 309841/0417 5. tufting machine according to claim 3, characterized that each of the channels (18) has a flexible portion (37) that separates the allows both parts of each channel. 6. Tufting machine according to claim 3j, characterized in that for each channel (18) two telescopically cooperating components (37A, 37B) that allow the two parts of each channel to be separated. 7. tufting machine according to claim ^, characterized in that a clamping device (56) is present, which serves to hold the yarn section in question at the Eeschickungsstation (20) until it has been incorporated into the base layer (B) as a pile. 8. tufting machine according to claim 3 »characterized in that for the base layer (B) Guiding devices (50> 51) are available, which make it possible to remove the last formed ilornoppen from the To remove paths along which the tufting needles (22) move during their next kub. 9. tufting machine according to claim 6, characterized in that a tufted kaitestjuirje (2; 62Λ) is present, which is used to form the last To keep tufts outside of the paths along which the tufting needles (22) during their next Hubes move after the tuft knobs formed last through the devices (5C, 51) for guiding the carrying material (B) have been removed from these webs. 10. tufting machine according to claim 3> characterized in that the severing of the twine (E, W, B) is effected in that a first part (34 ·) of each ^ arisls (18) ref en over a second part 309841/0417 (35) of the channel in question is moved to the opening (32) between the first and second part of the channel to form that the means (30) for severing the Strands of yarn is advanced through all the openings in order to sever the strands of yarn, and that the first part of each channel relative to the second part of the channel in question is moved so that the relevant opening closes in order to bring the pneumatic pressure or an air flow into effect, so that the yarn strands are transported so that they move along a distance equal to the length of the yarn sections of the corresponds to the next set to be produced. 309841/0417