Title of Invention

DEVICE AND METHOD FOR TREATMENT OF FILAMENT YARN, KNOTTED YARN, MIGRATED AND FALSE TWISTED YARN

Abstract The invention relates to a device for treating filament yam by means of air nozzles comprising at least two injector/cover plates that can be clamped together, and at least one air supply channel. Said injector/cover plates form a yarn treatment chamber in the assembled state. According to the invention, the yarn treatment chamber is formed between the injector/cover plates that can be clamped together, in the longitudinal direction of the plates, and the air nozzle is embodied as an open nozzle comprising a threading slit and an individual air supply channel for the yarn channel in the injector/cover plates. The invention has two decisive advantages. The shape of the injector/cover plates is limited to the inherent core functions, namely a yarn channel formed in the plates, the threading slit, and the individual air supply channel for the yarn channel in the plate. The miniaturisation of the injector/cover plates significantly simplifies the production problems.
Full Text Device and Method for Treatment of Filament Yarn
as well as Knotted Yarn, Migrated and False Twisted Yarn
Technical Scope
The invention pertains to a device for treatment of filament yarn with the help of a nozzle having a yarn channel that is designed as open and divided nozzle with threading slit and medium feed channel into the yarn channel, as well as a method for treating filament yarn with the help of a nozzle having a yarn channel that is designed as divided open nozzle with free threading slit and medium feed channel into the yarn channel. The invention further pertains to a knotted yarn, a migrated yarn and a false twisted yarn.
State-of-the-art Technology
In a spinning mill, after the spinning process, filament yarn is subjected to air treatment, so that the holding together of the individual filaments for yarn processing can be improved. Here one can distinguish between two different interventions:
migration for producing migrated yarn; and
swirling for producing knotted yarn.
The swirling is mainly intended to improve the holding together and also to effect an increase in the operation safety, e.g. spooling and unwinding of the filament yarn. While swirling, the blast air is blown vertically or slightly inclined approx. in the centre of the yarn channel. For migration, one should refer to the international patent application WO 00/52240. The objective of migration is to give the thread sufficient holding-together in the immediately subsequent processing of the yarn, so that the subsequent immediate intervention can be undertaken without any problem. With migration the filaments in the composite thread are only slightly crossed, so that no individual filaments project from the thread. Until recently, migration was conducted with the help of normal swirling nozzles. For swirling one used to work under the worst possible conditions, so that almost no knots were generated. It is the sole purpose of migration and swirling to improve the cohesion of the individual filaments of the thread for yarn processing as well as to improve the spooling and unwinding with multiple deflections. The objective is to prevent operational defects and thread breakages, without having any defective effect on the ready fabric due to knots.

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In spinning mills, the above mentioned treatments are applied with single or multiple nozzles. Often in the case of swirling, the nozzles are used as double nozzles. In case of multiple nozzles, the number of nozzles corresponds to the number of yarn runs. This could be 6 to 12. 16, 20 and since very recently even 24. The next objective is to double this to say 50 yarn runs.
An interesting extension of a nozzle body is described in the document US-PS 5 157 819. The nozzle body consists of a large number of flat plates which can be clamped together by a screw joint. The yarn channel is formed by means of continuous holes going vertically through each plate. The continuous holes are precisely aligned to one another in each plate, so that in the assembled-together condition a cylindrical, closed yarn channel is created through all plates. Alternately, plates with and without air feeding channels can be formed and fixed together with two end plates as a package. Here one refers to a closed nozzle without threading slit. The objective of the solution according to the document US-PS 5 157 819 was to have as large a number of air feeding channels as possible, whereby it was intended to produce knotted yarn as well as false twisted yarn with the same nozzle concept.
The document JP 200375802 shows an open, divided air nozzle for producing knotted yarn. On a medium feeding or air feeding element the divided nozzle body, consisting of a nozzle body and a baffle plate or cover plate, is assembled. Both parts are individually screwed on to the air feeding element. The nozzle body has an air feeding channel and a transverse hole for blowing in the treatment medium into the yarn channel. For the yarn channel, yarn channel profiles are fitted in the nozzle body and in the cover plate. Thus only in the assembled-together condition the yarn channel gets formed between the nozzle body and the cover plates. Between both bodies a clearance is foreseen, which forms the threading slit on the side away from the air feeding element. Only the nozzle body with the air feeding channel is sealed against the air feeding element with a ring seal. The nozzle is a typical swirling nozzle with somewhat centric and vertical arrangement of the air feed into the yarn channel. In case of two or more nozzles, the nozzle body as well as a cover plate have to be used twice or several times, which is a disadvantage with respect to a narrow division for the yarn runs.
A special case for application of swirling is warping machines. Here in very narrow division 500 to 2000 parallel yarn runs are simultaneously treated. The document EP 0 216 951

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shows such a special device for swirling multifilament threads. The swirling takes place at two levels, an upper and a lower level. The swirling channels are arranged for the corresponding number of yarn runs in an extremely small space, so that warping of chain threads can be guided with very narrow distance. The device for swirling has a number of slits arranged parallel beside one another. These are formed between disks and distance elements of a nozzle rod. The individual disks have a ring shape, whereby above the central region of each disk compressed air is fed and through corresponding cross-bores into the individual swirling zones designed as slits. The threads are transported with a distance to the slit base, in the influence range of the blast air, through the device. The disks have thread guides on the inflow side as well as the outflow side. By assembling a large number of disks with intermediate elements, front to front, so called nozzle rods are formed. The solution is extremely space conserving. One obtains a division for yarn runs to the tune of 4 mm. So that the chain threads cannot jump out of the treatment slits, a wire is drawn through in the outer region of the slits. The disks are made of ceramic, especially oxide ceramic. This gives a high life span, whereby the ceramic disks are produced in the forging method and subsequently burnt. With the help of clamping bolts, the large number of ceramic disks with intermediate plates to self-bearing nozzle rods is held stable against a carrier frame. The solution according to the document EP 0 216 951 has proved to be very good in warping machines. However, it was not possible to transfer the concept of the nozzle rod formed with disks to the above described area of swirling in spinning machines. In spinning machines, the number of parallel threads to be treated is much lesser, but it is continuously increasing in the present trend. Similarly, in spinning machines there is a demand for a narrow division of the parallel threads.
A completely different solution path for increasing the textile quality of the end product, i.e. the fabric, is achieved with the generation of a false twist. Here the twisting force of the blast air is used in order to permanently alter the molecular structure of the individual filaments by means of an immediately preceding treatment by heating and cooling of the yarn, so that there is a significant bulkiness in the yarn. As an example for false twisting, one can refer to the document EP PS 0 532 458; by false twisting, the filament yarn and the ready fabric is supposed to get a bulky, textile character.
A narrow division for several parallel running threads is increasingly in demand in different yarn treatments. In both the mentioned solutions according to the state-of-the-art technology

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given by EP PS 0 532 458 and US-PS 5 157 819 one obtains a relatively large distance between two parallel yarn runs. In the solution as per WO 00/52240 one obtains at least for two yarn runs, a division of approx. 8 to 10 mm. Only EP 0 216 958 allows a division up to approx. 4 mm.
From the designs so far, one obtains from the solution in the state-of-the-art technology two basic situations:
Three different nozzle concepts have asserted themselves:
1. Nozzles with a continuously open threading slit. These are referred to as open nozzles, as
e.g. in EP 0 532 458 and WO 03/029539 (fig. 8).
2. Nozzles that can be brought to an open threading position as well as a closed operating
position by means of a slide plate. These are referred to as open-closed nozzles, as e.g. in EP
0 216 951 and WO 03/029539 (fig. 8a).
3. Closed nozzles: here the yarn generally has to be threaded through the yarn channel with
the help of an air pistol conceived for the purpose, as e.g. in US-PS 5 157 819.
The second situation is that for each specific yarn treatment method, completely different nozzle designs have asserted themselves. Thus one speaks of:
- De-torque nozzles for post-treatment of false twisted yarn;
- Swirling nozzles for producing knotted yarn; and
- Migration nozzles for producing migrated yarn.
It is now the task of the inventors to find solutions for developing cost-effective nozzles for yarn treatment within the scope of open nozzles, also for divisions between two or more parallel yarn runs in the range of a few millimetres, whereby the concept can be applied especially even for single or double nozzles.
Presentation of the invention

The device as per the invention has a special feature that the nozzle is formed out of nozzle plates/cover plates that have a nozzle plate side and cover plate side, which can be assembled together on a medium feeding element and form a yarn channel between two adjacent nozzle plates/cover plates.

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The method as per the invention has a special feature that the yarn is guided for treatment between two equal plates together forming a yarn channel, whereby the plates are sealed from one another and with respect to the medium feeding side.
The knotted yarn or migrated yarn according to the invention, especially as microfilament yarn, has the special feature that it is guided for treatment between two equal plates together forming a yarn channel and a knotted yarn or migrated yarn is produced. The false twisted yarn as per the invention has the special feature that it is guided for treatment between two equal plates forming a yarn channel and false twisted.
The new solution brings in various decisive advantages. The shape of the plates, especially ceramic plates, is restricted to the actual core functions, namely:
- A yarn channel side introduced into each plate on both sides;
- The threading slit; and
- The individual air feeding channel for the yarn channel in the plate.
In this respect the nozzle plates/cover plates of a nozzle are same. Each of the nozzle plates/cover plates has both functions of nozzle plate or cover plate or baffle plate. Separate cover plates, like the ones according to JP-20-0375802 are not required. This itself, already allows a narrower division for several yarn runs. The plates can be produced with very small outer dimensions of e.g. 1 cm to 2 cm and a thickness of 4 mm or less. The simple plate shape makes it very easy to produce, particularly in ceramic, as these are now produced in a much cheaper manner by the injection method. At least the semi-finished parts for the plates can be produced in larger numbers and hence in a cost-effective manner. As the plates of a nozzle can be produced identical, in the case of an individual nozzle it can be installed rotated by 180°, so that with the not yet used yarn channel profiles one can double the life span with respect to wear and tear. By miniaturising the plates, the production problems get enormously simplified. The new solution allows, as will be explained later, production of the plates in the injection moulding method, which is significantly more cost-effective than the pressing method according to EPO 216 951. The second enormous advantage is that the yarn channel that is designed as a mere slit in EP 0 216 951 can be adapted to the specific treatment according to the new invention. The disks of EP 0 216 951 have the enormous advantage that two yarn runs get formed between two disks. On the other hand, the disadvantage of the

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solution as per EP 0 216 951 is that, with simultaneous integration of the yarn guides as well as the air feed in the plate concept, almost hand-sized disks get generated that can be produced only in the pressing method.
The new plate concept can be used in different treatment methods like swirling, migrating, false twisting and other textures in filament yarns. It can be used in Ried machines as a multiple nozzle and in texturing machines as single or double nozzle, and can further be used also in stretching machines and machines for false twist texturing.
In any case, for single nozzles, double nozzles or multiple nozzles, in each specific case of application always same nozzle plates/cover plates are used. Each of the nozzle plates/cover plates thereby has a nozzle plate side and a cover plate side and preferably also respective air feed channels. Each side is freely accessible for processing. This has the great advantage that both the yarn channel profiles can be created in each plate and can be conceived individually for the nozzle side and the baffle plate or cover plate side and, for example, even incorporated. In the world of experts, in the case of swirling nozzles one refers to a nozzle plate and a baffle plate. The nozzle plate has the transverse hole at least for the main air for a double swirl. The baffle plate has the opposite side, on which the treatment air impacts. In case of de-torque nozzles the objective is to generate a strong rotation flow with the air, i.e. a false twist, for the yarn. Here, for a divided nozzle, instead of the baffle plate one has to speak of a cover plate. As the new solution can include both applications, the term "nozzle-/cover plate" has been chosen. Each nozzle-/cover plate has for both design extensions one half each that can fulfil the function only after being assembled together.
The new solution allows a large number of particularly advantageous extensions, for which the claims 2 to 21 and 23 to 29 should be referred to. Ideally, the yarn channel is designed semicircular on the nozzle plate side and flat on the cover plate side. As the yarn channel is introduced into the plate, almost any kind of influence can be exercised on the shape of the yarn channel. The same holds good also for the air feed channel. Ideally the plates are designed, on the one hand, as nozzle plate and, on the other hand, as buffer plate or cover plate and conforming approx. to half the yarn channel.
Miniaturization of the plate allows designing of the plate as flat ceramic plate produced in the injection moulding method, which can be clamped together to form an assembly group over two end plates. The injection moulding method is significantly most cost-effective as

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compared to the pressing method conforming to the suggestion made,in EP 0 216 951. The entire assembly group can be fastened on to a carrier support with built-in air feed channel, to which the air feed channels of each plate can be connected. The carrier support can be made of metal or plastic. The relatively expensive ceramic is used according to the new invention only where the required function called for the highest quality and precision. According to another extension, each of the plates has at least one cross-bore for feeding the medium on the nozzle plate side for individual air feeding into the yarn channel. Each of the at least two plates has a medium feed channel that can be individually activated through corresponding connection openings of the medium feeding elements, so that free flow off of the not used air feed opening can be avoided. Each of the at least two plates of a nozzle is designed identical at least with respect to the yarn channel profile and has respectively a nozzle plate sided and cover plate sided profile, that form a yarn channel only in assembled-together condition. As only two plates form a yarn channel together, for each pair of two or more plates one respectively obtains two not used outer sides. In the case of a simple nozzle this has the great advantage that, after strong wear and tear of the active yarn channel profiles, both plates can be installed rotated by 180°, so that the life span of a nozzle gets doubled.
The nozzle-/cover plates are preferably designed as ceramic plates or have at least in the region of the yarn channel profile, corresponding highly wear-resistant surface coating. The at least two same nozzle-/cover plates have a reduced thickness around the threading slit in the threading region with respect to the air channel region and have in the air channel region a flat sealing surface on both sides. The sealing surfaces are provided with a very high surface quality, so that when pressed together they form an air-tight locking without special sealing. In this way. also a very high precision can be guaranteed for the yarn channel while assembling the plates together. The individual medium feed channel is guided approx. centric into the yarn channel, whereby on both sides, perpendicular to the flat sealing surfaces, at least two continuous openings are arranged for exact positioning of the plates or their yarn channel profile with the help of slide rods. If the continuous openings are non-uniform, then they also simultaneously serve as safety mechanism against erroneous installation.
According to yet another extension principle, each of the plates has clamping grooves sideways, preferably in the region of the flat sealing surfaces, for tight pressing of all plates on the medium sealing clement. On the medium feed side, it is advantageous if additionally sealing elements are provided between the plates and the medium feed element.

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The new solution allows assembling together of arbitrarily many nozzle-/cover plates for
correspondingly many yarn runs. A single nozzle for only one yarn run consists of two
nozzle-/cover plates. A double nozzle for two yarn runs consists of three nozzle-/cover plates.
For treatment of two or more yarn runs, the number of plates corresponds to the number of
yarn runs + 1.
According to a first application, as swirling nozzle for production of knotted yarn, the cross-bore for medium feeding enters into the yarn channel approx. centric; vertically or with slight
i conveying effect. For production of fine knotted yarn with high uniformity of the knot, a
blast air channel extension is formed in the mouth region of the blast air feed channel in the yarn treatment channel, for formation of an air treatment chamber, for two opposite-running stationery twist flows.
According to a second application, during false twisting the cross-bore for medium feeding enters tangentially into the yarn channel. The corresponding device is designed as de-torque nozzle.
The plates are designed as flat plates and have on both sides flat sealing surfaces with two continuous holes in the region of the flat sealing surfaces. With the help of the continuous holes, the plates are pushed up individually on slide rods to a nozzle, block, positioned exactly to one another and drawn together to a nozzle block perpendicular to the flat sealing surfaces with the help of a screw joint on the slide rod. On both sides of the nozzle block stable end plates can be attached, through which the plates designed in ceramic are clamped together. The medium feeding element can further have a carrier support, on which each of the nozzle-/cover plates of the nozzle block can be tightly fastened over the clamping grooves. The carrier support or the end plate can be provided with a colour code, so that one can identify on the basis of the colour as to which nozzle type has been installed. The nozzle block is fastened on a medium feeding socket with built-in air feed channel, co which the air feed channel to be activated can be connected. In case of a multiple nozzle, it is connected with
corresponding number of plates as nozzle group or nozzle block to a nozzle holder, on which
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a thread guider is provided. The clamp-able plates are fastened on the carrier support with two end plates as assembly group, whereby thread guiders are arranged in thread guider carriers fastened to the nozzle holder and designed preferably as comb. According to a

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further preferred extension of the method, the plates are combined to a nozzle block through slide rods and the nozzle block is braced over clamping cams over washers on to a medium feeding element. To ensure exact positioning of the ceramic plates with respect to the yarn channel, the ceramic plates arc guided over slide rods and combined into a nozzle block. The nozzle block is braced air-tight on a carrier support preferably foreseen with colour code with common air feed.
According to another particularly advantageous extension of the method for production of knotted yarn from smooth and texture filament yarn, blowing in is done in a continuous yarn channel of a swirl nozzle with a main hole for primary air aligned centrally in the yarn channel axis, as well as at least an auxiliary hole at a distance to the main hole for secondary air. The primary air is fed into the yarn channel between vertical and with only slight conveying effect or slight effect against the yarn conveying direction, and the secondary air through the at least one auxiliary hole inclined to the yarn channel axis and aligned different than the primary air and supporting the swirl flow.
According to another extension for production of fine knotted yarn with high uniformity of the knots, blast air is blown in transverse to the yarn treatment channel with the help of air nozzles with a yarn treatment channel. The blast air forms a double twist in yarn conveying direction as well as an effect in yarn conveying direction for producing the knots. The blast air is converted into two strong stationary twist flows undisturbed by filament bundles in the entry region into the yarn treatment channel in a short air twist chamber in yarn channel longitudinal direction. The nozzle plate sided cross-bores for air feed are preferably arranged somewhat longitudinally centric to the yarn channel, transverse or slightly inclined to the axis of the yarn channel for nozzles, which are foreseen for twisting or migrating the yarn. On the other hand, the cross-bores are attached tangentially in the yarn channel for nozzles, which is meant for false twisting of yarn.
Preferably on both sides of the carrier support and at a distance before the yarn channel entry and after the yarn channel exits, thread leaders are arranged for each thread run. The carrier support takes over both auxiliary functions of the thread guider as well as the air feeding and air distribution on to the individual plate. The device is designed as single or double nozzle each having two end plates, which can be clamped together over clamping agents. In case of a multiple nozzle, these are designed for the foreseen yarn run with a corresponding number

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of plates as nozzle group with an air feed channel in the carrier support and a thread guider. All clamp-able plates, each with two end plates as assembly group, are fastened on the carrier support with an air feed channel in the carrier support, whereby the thread guiders are fixed in thread guider carriers fastened on to the carrier support.
Short description of the invention
The invention is explained below on the basis of some design examples with further details. The following are shown:
Fig. 1 a A nozzle-/cover plate or nozzle-/cover slab ] designed as per the
invention, approx. in double the actual size;
Fig.lb A section A-A of the fig.1 in great enlargement;
Fig.2 An assembly group with several nozzle-/cover plates and 8 yarn runs, in
perspective depiction above, and below as section A-A of the above figure;
Fig.3 A schematic side view of fig. 2 (top) and below a section B-B of the
above figure;
Fig.4 Shows a single nozzle in perspective depiction (top left) as top view
(left bottom), as side view (top right) as well as section A-A;
Fig.5 Shows analogous to the depiction in fig. 4 a double nozzle;
Fig.6a A complete nozzle block with 24 yarn runs, above in a normal view and
below a top view;
Fig.6b Various sections B-B to F-F;
Fig.6c The complete nozzle block with three different views;
Fig.7a and 7b A solution with a special clamping unit for the nozzle block;
Fig.8 and 9a A particularly interesting extension of the mouth region of the cross-
channel with formation of an air test chamber;
Fig.9b to 9d Show various knot structures in the yarn;
Fig. 10a to 10c A solution with primary and secondary air for the treatment medium,
whereby fig. 10b and 10c depict particular extension of the cross-channels;

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Fig.l la to l1d The application of the new nozzle as de-torque nozzle for false twisting
of yarn with different forms of tangential air blowing and the threading
slit;
Fig. 12 and 13 Show an example for the application of the new solution within the
frame work of the POY-process;
Fig. 14 Shows application of the new solution within the frame work of the
FDY-process with four examples.
Ways and execution of the invention
Fig. I and la show a nozzle-/cover plate 1 that is a simultaneously cover plate and nozzle plate, with corresponding half yarn channel 17. The front side shows the cover plate side 2 and the back side the nozzle plate side 3, each with one half of the yarn channel 17. On the front side 2, the yarn channel half 4 with the buffer plate 5 is introduced into the nozzle-/cover plate 1. On the back side of the nozzle plate side, the yarn channel half 6 is depicted. In fig. la and fig. 2 (bottom) an air feed channel 8 can be seen from the sectional depiction. The air feed channel 8 is guided with a cross-bore 9 into the yarn channel half 6 with the nozzle plate 7. The nozzle-/cover plate 1 has two continuous holes 10 and 10' for clamping together the plate 1. As one can identify from fig. 3, each of the two nozzle-/cover plates 1 impact tightly with one another, front side to front side. The corresponding sealing surface part 11 is denoted with the dimensions h and L. whereby L is simultaneously a yarn channel length or half of the yarn channel length (L/2) according to fig. 2. The upper surface part 12 is marked with the measurement X and L and is brought back to the dimension Z towards the sealing surface part I I. Above the surface part 12 there is an inclined surface 13 that allows easy introduction of the thread into the yarn channel 17. The particular characteristic of the nozzle-/cover plates 1 is that these have a threading section Ef on top and a yarn channel DK below it. as well as a scaling section DF at the bottom. The sealing section DF has both scaling surfaces 11, 1 ]' as well as a lower support surface 7. The support surface 7 has to be sealed against a carrier support 24, as marked in fig. 2 with the reference sign 7'. The holes 10 and 10' are preferably of different size, so that the nozzle-/cover plates 1 can be correctly installed over corresponding slide rods 18.

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As one can see from fig. 2 and 3, from the geometric arrangement of the corresponding surface part on the nozzle plate side as well as the cover plate side, one obtains a threading slit 14 in assembled-togcther condition. The new solution gives a small, relatively simple shaped plate that can be cost-effectively produced in the injection moulding method as ceramic part, as already described earlier. In fig. 2 and 3, a number of ceramic plates have been assembled together to form a nozzle block with respectively one end plate 15 and 16 for eight yarn run. All plates are clamped together into an assembly group 20 through clamping screws or slide rods 18 that are guided through the holes 10, 10'. Each of the nozzle-/cover plates 1 has an air feed channel 8 (fig. la) that is open below. The dimension H refers to the cross-measurement of the assembly group 20 that, depending on number of plate 1 and thickness "d", is greater or smaller. Fig. 2 shows a complete device as nozzle group 25 for a spinning machine. The thread run is generally vertical from top to bottom, as indicated with arrows 21. Fig. 2 shows, as in fig. 3. eight yarn runs, where a single yarn has the reference sign 22. The assembly group 20 is screwed air tight on to carrier support 24 by fastening screws 23. The carrier support 25 has an air feed channel 26, from which compressed air or blast air is supplied through the individual air feed channel 8. The inlet side of the nozzle group is denoted by "in" and the outlet side by "out". On the inlet side as well as on the outlet side there is a thread guider girder 27 that is fastened on to the carrier support 24 by screws 28. Corresponding to the number of thread runs 21, comb-shaped thread guiders 31 with teeth 29 are arranged on the thread guider girder 27. The yarn is guided sideways in the intermediate spaces between the teeth 30. The tooth base is aligned on to the yarn channel floor. The thread guider girder 27 as well as the carrier support 24 can be made of aluminium or cost-favourable plastics. The thread guider comb is preferably made of ceramic, so that the wearing part gets a maximum life span.
Fig. 4 shows the use of the new solution as single nozzle. The yarn channel consists of two nozzle-/cover plates 1. The depictions in fig. 4 are conceived for only one yarn run. Conceptually, the single nozzle is conceived the same way as a multiple nozzle with a carrier support 24. The depictions in fig. 4 show on the top left side a complete assembly group for a single nozzle, with two nozzle-/cover plates 1 with a carrier support 24 and a nozzle holder 19.
The diagrams in fig. 5 show a double nozzle with three nozzle-/cover plates 1 in perspective depiction (left top) in a top view (left bottom), in a side view (right top) and a section A-A

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(right bottom). As each of the plates is designed same, three nozzle-/cover plates are required for the double nozzle.
Fig. 6a, 6b and 6c show another very interesting design of a multiple nozzle 24 yarn run. This solution is basically suitable for more than 2 yarn runs. The topmost figure shows a nozzle block 25 with 25 nozzle-/cover plates 1, with are held together over two slide rods 18 and after installation are tightly clamped on to one another with great force. Each of the nozzle-/cover plates has clamping grooves 30 on both sides. Each nozzle-/cover plate is braced air tight on a sealing 32 over two clamped rails 31. For this, on both sides a number of clamping screws 33 are clamped against a compression spring 34, as shown in fig. 6b. Fig. 6c shows a complete nozzle assembly group 20. The nozzle block 25 represents an independent component, which is mounted on the carrier support 24 and fastened during assembly. Subsequently the carrier support 25 with the nozzle block 25 is screwed airtight on a nozzle holder 19. With the help of suitable extension, the nozzle block 25 can first be pushed in on one side over the slide rod. then countersunk and then fastened on the carrier support.
Fig. 7a and 7b show an appropriate design, in which the nozzle block 25 is drawn together over a rope-type draw element 35. The exact guiding for the nozzle-/cover plate is ensured here by means of fitting sleeves 36. As in the fig. 6b, fig. 7b shows a nozzle block with carrier support 24 from two different sides; (top) and below as view from below with the contact surface 37 to the nozzle holder 19. The reference sign 38 shows an elastic sealing.
Fig. 8 and 9a show a particularly advantageous further extension. Content-wise, reference is made to the not yet published Swiss patent application number 00482/05 dated 20 March 2005. The yarn treatment channel 17 here additionally has an air twist chamber 41, that represents a direct continuation of the blast air feed channel or cross-bore 9 into the yarn treatment channel 17. The yarn treatment channel 17 is extended at the position of the blast air feed channel 9 in a cup-shaped manner. This gives an additional twist flow. The cup-shaped extension allows a stationary twist flow without the influence of the non-stationary swirl movement in the subsequent part of the yarn treatment channel 17, The stationary twist flow immediately goes over into a non-stationary swirl flow. The blast air is converted in the entry region into the yarn treatment channel into two strong stationary twist flows undisturbed by filament bundles in a short air twist chamber in yarn channel longitudinal direction. A short region with a stable twist flow is generated in the air twist chamber which is followed

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by an alternate swirl zone in yarn transportation direction as well as also against the yarn transportation direction. While processing micro-filament yarn, for blast air a pressure of 0.5 to 1.5 bar is used for production of soft knots that can get released during further processing, or blast air compressed air of above 1.5 bar is used for producing hard knots that do not get released during further processing. In this way, fine yarns lesser than 10 to 15 dps, preferably lesser than 2 dps. can be treated. The air twist chamber is designed at least approaching symmetric to the yarn channel centre axis and protrudes on both sides lesser than 0.5 mm beyond the side yarn channel walls. The air twist chamber protrudes beyond the blast air feed channel in yarn channel longitudinal direction by lesser than 0.5 mm. Fig. 8 and 9a show the result of theoretical flow calculation. In fig. 8 one can clearly see the blast air feed DL from below towards the top. The upper plane is denoted by E and represents the impact surface of the blast air current BL on the double plate. The air twist chamber is obtained from both the small cup-recesses 42. In fig. 8 one can clearly identify both the twist flows 43, which in a range of lesser than 1 to 2 mm in longitudinal direction, give a very stable flow shape. On the basis of the same calculation model (without presence of yarn), in fig. 8 one can identify in the centre the stationary twist flow and above in the picture, both the double swirls 44. Fig. 9a is a drawing that schematically depicts both the flow shapes. Only larger experiments very recently have shown that the knowledge about knot formation was very incomplete. The knot formation actually is not generated simply by both the stable double swirls. A basis pre-requisite for knot formation is the following fact:
a) With the blast air jet DL a double swirl is generated in tne yarn treatment cnannei ^ng. ia
and 1b).
b) The double swirl is however completely disturbed if a filament yarn 22 enters into the
yarn treatment channel 17. Within milliseconds the stable double swirl is disturbed on
entry of the yarn. In one yarn treatment channel half, a one-sided swirl 44X is created,
while the swirl 44X collapses. The result is that all filaments in the yarn treatment channel
3 are forced on to the right side. The accumulation of all filaments on the right side
however immediately disturbs this double whirl, so that almost without any delay a
correspondingly large whirl 44X sets in on the left side. This swing movement in the
presence of blast air or filament yarn is a completely unstable permanent condition and
ultimately the secret of knot formation.

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Fig. 9b shows on top smooth, i.e. untwisted yarn 2. The individual filaments are indicated by straight line. Secondly, a soft twisted yarn. There it is typical that the knots K are rather shorter, whereby the knots are symbolised by a thin straight line. The third depiction shows hard, relatively long knots K between the twisted open points. The hard knots are symbolised by straight line. The fourth depiction shows typical knotted yarn from the state-of-the-art technology with very non-uniform knots.
Fig. 9c shows a few examples with non-uniform knot formation. Fig. 9d is a comparison for hard and soft knots that can be produced according to the new invention. Fig. 9d shows a typical allied area of application of compressed air of 1.5 to 2.3 bar or 0.5 to 1.5 bar. Depending on the market situation, hard knots or soft knots are in demand.
The new solution according to fig. 10a suggests feeding of primary air (DL) and secondary air (SL). As in the example, the compressed air feed is slightly inclined in transportation direction, a strong whirl current is generated in the direction of the yarn channel exit Ak2. This can be identified from the larger lines concentration in the exit region. In fig. 10b and 10c two auxiliary holes for secondary air SL are arranged relatively strongly inclined in transport direction with an angle 5. Both auxiliary holes are symmetrically arranged in the respective edge regions of the yarn channel, as marked by the distance dimension Z. A variants' is indicated as possibility. In fig. 10a one can identify three conspicuous zones A, B, C. A slightly intensive zone A is generated by the region Akl as well as corresponding zone C in the region Ak2. Quite surprisingly, a very stable edge flow zone B l or B2 sets-in in the main swirling zone V-V on both sides of the yarn channel. It is the zone in which actually the knots arc strongly influenced,, in contrast to the section O that primarily serves the purpose of the opening of the yarn. As the side edge region stabilizes the secondary air and also a strong conveying effect is generated, the knot formation can be surprisingly positively influenced in all significant quality criteria, as already explained above. Fig. 10b and 10c show two examples for the arrangement of the main hole 50 and the auxiliary hole 51 for secondary air (SL).
Fig. 1 la to l1b show the application of the new nozzle as de-torque nozzle for the final twisting of filament yarn with different forms of air blowing and threading slit. In the false twist texturing device schematically shown in fig. 1 la to 1 lb, a multi filament yarn to be textured is fed to a twist generator 61, e.g. friction-twist generator, through a first heating unit

16
60. The textured yarn leaving the twist generator 61 is bulky and highly elastic. The expansion given to the yarn by the twist generator 61 has got released after the twist generator. In known false twist texturing devices there existsa torsion moment in the yarn that again tries to twist the yarn. The yarn is then guided in the known method through a second unit 60 connected after the twist generator 61, with reduces the elasticity of the yarn. According to the invention, a nozzle 63 is connected to the second heating unit 62, which again gives a false twist to the yarn running through the heating unit 62 and that too in a direction opposite to the direction of the twist generated in the twist generator 61. In this way, the above mentioned torsion moment in the yarn gets reduced or is practically totally removed in the second heating uni1 62. The nozzle 63 is supplied with compressed air from a compressed air pipe 64. The nozzle 63 has a blast air channel 65 going tangentially into the yarn channel 17. Figs. 1la to l1d similarly show a single nozzle, however used for generation of a false twist of the yarn. For the false twist process, the document EP 0 532 458 is referred to. Both plates must be designed for generation of the false twist with tangential air inlet. Both plates are denoted according to their different function with the reference sign 1'andl".
Fig. 12 and 13 show the TOY-process. In both cases, a pre-twisting and an actual twisting is carried out. Fig. 12 shows a parallel TOY/HOY-spinning machine. In this process there are no deflection rollers. One can regulate the thread tension for twisting only with the winding speed. This solution is used at least in Europe and the USA. Fig. 33 shows a TOY-spinning machine with deflecting rollers. The advantage of the TOY-process is that one can regulate the thread tension belter. The deflection rollers are not heated in this process. This solution is used at least in Asia, but also in Europe and the USA. Fig. ,14a depicts a FDY-process with migration as well as twisting. This is the standard in FDY-spinning. In this process one has two heated mono's or duo's. Here the thread tension can be adjusted very well. Fig. 14b is a FDY-process (H4S or H5S) and shows an example for a pre-twisting and for a twisting. This process has cold gullets for stretching and subsequently the yarn is relaxed with steam. Fig. 14c is a FDY-process and shows successively a migration as well as two twists. In this process the yarn is heated before preparation with a heater and subsequently stretched with cold gullets. Fig. 14b is a FDY-process and shows a migration as well as a twisting, however without heat application. Here the yarn is subjected to a hot air before preparation and subsequently stretched with cold gullets.

17 Patent Claims
1. Device for treatment for filament yarn with the help or a nozzle naving a yarn cnannel,
which is designed as open and divided nozzle with threading slit and medium feeding
channel into the yarn channel,
having the distinctive feature that
the nozzle is formed by nozzle-/cover plates, each of which have a nozzle side and a cover plate side and can be assembled together on a medium feeding element and form a yarn channel between two adjacent nozzle-/cover plates'.
2. Device as per claim 1,
having the distinctive feature that
the at least two plates have yarn channel profiles introduced into them, which in assembled-together condition form a yarn channel.
3. Device as per one of the claims 1 or 2.
having the distinctive feature that
each plate has at least one cross-bore for feeding the medium on the nozzle plate side for individual air feeding into the yarn channel.
4. Device as per one the claims 1 to 3,
having the distinctive feature that
each of the at least two plates have a medium feeding channel that can be individually activated through corresponding connection openings of the medium feed element.
5. Device as per one of the claims 1 to 4,
having the distinctive feature that
the nozzle-/cover plates are designed as ceramic plates, or at least in the region of the yarn channel profile have a corresponding highly wear-resistant surface coating.
6. Device as per one of the claims 1 to 5,
having the distinctive feature that
each of the at least two plates of a nozzle is designed identical with respect to the yarn

18
channel profile and has respectively a nozzle plate sided and cover plate sided yarn channel profile, which in assembled-together condition form a yarn channel.
7. Device as per one of the claims 1 to 6,
having the distinctive feature that
i the nozzle-/cover plates have a reduced thickness around tne threading slit with respect
to the air feed region and in the air feed region has a flat sealing surface on both sides.
8. Device as per one of the claims 1 to 7,
having the distinctive feature that
the individual medium feed channel is guided approx. centric into the yarn channel and on both sides, perpendicular to the flat sealing surfaces, at least two continuous openings are arranged for exact positioning of the yarn channel profile.
9. Device as per claim 8,
having the distinctive feature that
the continuous openings are unequal and meant as safety against erroneous installation.
10. Device as per one of the claims 1 to 9,
having the distinctive feature that
each of the plates has clamping grooves sideways, preferably in tne region or the flat sealing surfaces, for tight pressing of all plates on the medium feed element.
11. Device as per one of the claims 1 to 10.
having the distinctive feature that
it has two nozzle-/cover plates and is designed as single nozzle for one yarn run.
12. Device as per one of the claims 1 to 10,
having the distinctive feature that
it is designed as double or multiple nozzle for two or more parallel yarn runs, with respectively one additional nozzle-/cover plate as compared to the number of yarn runs.

19
13. Device as per one of the claims 1 to 12,
having the distinctive feature that
the cross-bore for medium feed enters into the yarn channel almost centric perpendicularly or with slight conveying effect, and the device is designed as twisting nozzle.
14. Device as per claim 13,
having the distinctive feature that
the production of fine knotted yarn takes place with high uniformity of the knots with a continuous yarn treatment channel and a blast air feed channel, whereby the blast air feed channel is aligned on to the longitudinal central axis of the yarn treatment channel, and in the mouth region of the blast air feed channel in the yarn treatment channel a blast air channel, an extension is formed for formation of an air twist chamber, for two opposite-running stationary twist flows.
15. Device as per one of the claims 1 to 12.
having the distinctive feature that
the cross-bore(s) for medium feed enters tangentially into the yarn channel and the device isdesigned as de-torque nozzle.
16. Device as per one of the claims 1 to 15,
having the distinctive feature that
the plates are designed as flat plates and have on both sides flat sealing surfaces with two continuous holes in the region of the flat sealing surfaces, and with the help of the continuous hole can be pushed up individually on slide rails into a nozzle block, can be positioned precisely to one another and can be drawn together to a nozzle block vertically to the flat sealing surface's by means of screw joints on the slide rails.
17. Device as per claim 16,
having the distinctive feature that
the nozzle block has a stable end plate on both sides, through which the plates designed in ceramic can be clamped together.

20
18. Device as per one of the claims 1 to 17,
having the distinctive feature that
the medium feed element has a carrier support, on which each of the nozzle-/cover plates of the nozzle block can be tightly fastened over the clamping grooves, and the carrier support or the stable end plates are provided with a colour code.
19. Device as per one of the claims 16 to 18,
having the distinctive feature that
the nozzle block can be fastened on a medium feed support with built-in air feed channel, to which the air feed channel to be activated can be connected.
20. Device as per one of the claims 16 to 19,
having the distinctive feature that
it can be connected as multiple nozzle with corresponding number of plates as nuzzle group or nozzle block with nozzle holder, which has a thread guider.
21. Device as per claim 20,
having the distinctive feature that
the clamp-able plates, each with two end plates as assembly, group, are fastened on the carrier support, whereby thread guiders are arranged in thread guider carriers fastened to the nozzle holder and are preferably designed as comb.
22. Method for treatment of the filament yarn with the help of a nozzle having a yarn
channel that is designed as divided open nozzle with free threading slit and medium
feed channel into the yarn channel.
having the distinctive feature that
the yarn is guided for treatment between two equal plates together forming a yarn channel, whereby the plates are sealed with respect to one another and with respect to the medium feed side.
23. Method as per claim 22,
having the distinctive feature that
for treatment of two or more yarn runs, the number of plates corresponds to the
number of yarn runs + 1.

21
24. Method as per one of the claims 22 or 23.
having the distinctive feature that
the plates are combined to a nozzle block over guide rails and the nozzle block is braced over clamping cams on to two sealings of a medium feed elements.
25. Method as per one of the claims 22 to 24,
having the distinctive feature that
for ensuring of exact positioning of the ceramic plates with respect to the yarn channel, the ceramic plates are guided over slide rails and combined to a nozzle block, whereby the nozzle block is braced on to a carrier support provided with colour code in an airtight manner with common air feed.
26. Method as per claim 22,
having the distinctive feature that
feeding of the medium and particularly air into the yarn channel takes place through a cross-bore in a plate approx. longitudinally centric to the yarn channel, transverse or slightly inclined to the axis of the yarn channel, and the filament yarn is twisted or migrated.
27. Method as per one of the claims 22 to 26, for production of knotted yarn from smooth
and textured filament yarn in a continuous yarn channel of a whirl nozzle with a main
hole aligned centrally into the yarn channel axis for primary air, as well as at least one
auxiliary hole at a distance to the main hole for secondary air, whereby the primary air
is fed into the yarn channel between vertically and with only slight conveying effect or
low effect against the yarn conveying direction, and the secondary air is fed through
the at least one auxiliary hole inclined to the yarn channel axis and directed differently
than the primary air and supporting twist flow.
28. Method as per one of the claims 22 to 27, for production of fine knotted yarn with high
uniformity of the knots with the help of air nozzles with a yarn treatment channel, as
well as blast air that is blown transverse to the treatment channel, whereby the blast air
forms a double twist for generation of knots in yarn conveying direction as well as
against the yarn conveying direction, and the blast air is converted into two strong

22
stationary twist flows undisturbed by filament bundles in the entry region into the yarn treatment channel in a short air twist chamber in yarn channel longitudinal direction.
Method as per one of the claims 22 or 25, having the distinctive feature that
the medium feed, particularly air feed, into the yarn channel is guided tangentially into the yarn channel through a cross-bore for false twisting of tne filament yarn.
Knotted yarn or migrated yarn as per one of the claims 22 to 28, having the distinctive feature that
for treatment it is guided between two equal plates forming together a yarn channel and a knotted yarn or migrated yarn is produced.
False twisted yarn as per claim 29, having the distinctive feature that
it was guided for treatment between two equal plates together forming a yarn channel
and false twisted.
The invention relates to a device for treating filament yam by means of air nozzles comprising at least two injector/cover plates that can be clamped together, and at least one air supply channel. Said injector/cover plates form a yarn treatment chamber in the assembled state. According to the invention, the yarn treatment chamber is formed between the injector/cover plates that can be clamped together, in the longitudinal direction of the plates, and the air nozzle is embodied as an open nozzle comprising a threading slit and an individual air supply channel for the yarn channel in the injector/cover plates. The invention has two decisive advantages. The shape of the injector/cover plates is limited to the inherent core functions, namely a yam channel formed in the plates, the threading slit, and the individual air supply channel for the yam channel in the plate. The miniaturisation of the injector/cover plates significantly simplifies the production problems.

Documents:

03701-kolnp-2006-abstract-1.1.pdf

03701-kolnp-2006-abstract.pdf

03701-kolnp-2006-claims-1.1.pdf

03701-kolnp-2006-claims.pdf

03701-kolnp-2006-correspondence others-1.1.pdf

03701-kolnp-2006-correspondence others.pdf

03701-kolnp-2006-correspondence-1.2.pdf

03701-kolnp-2006-correspondence-1.3.pdf

03701-kolnp-2006-correspondence-1.4.pdf

03701-kolnp-2006-description (complete).pdf

03701-kolnp-2006-drawings.pdf

03701-kolnp-2006-form-1.pdf

03701-kolnp-2006-form-2.pdf

03701-kolnp-2006-form-26.pdf

03701-kolnp-2006-form-3.pdf

03701-kolnp-2006-international publication.pdf

03701-kolnp-2006-international search authority report.pdf

03701-kolnp-2006-other document.pdf

03701-kolnp-2006-others-1.1.pdf

03701-kolnp-2006-pct other.pdf

03701-kolnp-2006-priority document-1.1.pdf

03701-kolnp-2006-priority document.pdf

3701-KOLNP-2006-ABSTRACT 1.1.pdf

3701-KOLNP-2006-ABSTRACT 1.2.pdf

3701-KOLNP-2006-ABSTRACT-1.3.pdf

3701-KOLNP-2006-ABSTRACT-1.4.pdf

3701-KOLNP-2006-ABSTRACT.pdf

3701-KOLNP-2006-AMANDED PAGES OF SPECIFICATION.pdf

3701-KOLNP-2006-AMENDED CLAIMS.pdf

3701-KOLNP-2006-CANCELLED PAGES 1.1.pdf

3701-KOLNP-2006-CANCELLED PAGES.pdf

3701-KOLNP-2006-CLAIMS 1.1.pdf

3701-KOLNP-2006-CLAIMS 1.2.pdf

3701-KOLNP-2006-CORRESPONDENCE 1.2.pdf

3701-KOLNP-2006-CORRESPONDENCE 1.6.pdf

3701-KOLNP-2006-CORRESPONDENCE-1.4.pdf

3701-KOLNP-2006-CORRESPONDENCE-1.5.pdf

3701-KOLNP-2006-CORRESPONDENCE.pdf

3701-KOLNP-2006-DESCRIPTION (COMPLETE) 1.1.pdf

3701-KOLNP-2006-DESCRIPTION (COMPLETE) 1.2.pdf

3701-KOLNP-2006-DESCRIPTION (COMPLETE).pdf

3701-KOLNP-2006-DRAWINGS 1.2.pdf

3701-KOLNP-2006-DRAWINGS.pdf

3701-KOLNP-2006-EXAMINATION REPORT.pdf

3701-KOLNP-2006-FORM 1 1.2.pdf

3701-KOLNP-2006-FORM 1.1.1.pdf

3701-KOLNP-2006-FORM 1.pdf

3701-KOLNP-2006-FORM 13.pdf

3701-KOLNP-2006-FORM 18.pdf

3701-KOLNP-2006-FORM 2 1.2.pdf

3701-KOLNP-2006-FORM 2.1.1.pdf

3701-KOLNP-2006-FORM 2.pdf

3701-KOLNP-2006-FORM 26.pdf

3701-KOLNP-2006-FORM 3 1.3.pdf

3701-KOLNP-2006-FORM 3.1.1.pdf

3701-KOLNP-2006-FORM 3.pdf

3701-KOLNP-2006-FORM 5.pdf

3701-KOLNP-2006-FORM-27.pdf

3701-KOLNP-2006-GPA.pdf

3701-KOLNP-2006-GRANTED-ABSTRACT.pdf

3701-KOLNP-2006-GRANTED-CLAIMS.pdf

3701-KOLNP-2006-GRANTED-DESCRIPTION (COMPLETE).pdf

3701-KOLNP-2006-GRANTED-DRAWINGS.pdf

3701-KOLNP-2006-GRANTED-FORM 1.pdf

3701-KOLNP-2006-GRANTED-FORM 2.pdf

3701-KOLNP-2006-GRANTED-LETTER PATENT.pdf

3701-KOLNP-2006-GRANTED-SPECIFICATION.pdf

3701-KOLNP-2006-INTERNATIONAL PRELIMINARY EXAMINATION REPORT.pdf

3701-KOLNP-2006-INTERNATIONAL PUBLICATION.pdf

3701-KOLNP-2006-INTERNATIONAL SEARCH REPORT.pdf

3701-KOLNP-2006-OTHERS 1.1.pdf

3701-KOLNP-2006-OTHERS 1.2.pdf

3701-KOLNP-2006-OTHERS PCT FORM.pdf

3701-KOLNP-2006-OTHERS.pdf

3701-KOLNP-2006-PCT REQUEST FORM.pdf

3701-KOLNP-2006-PRIORITY DOCUMENT.pdf

3701-KOLNP-2006-REPLY TO EXAMINATION REPORT 1.1.pdf

3701-KOLNP-2006-REPLY TO EXAMINATION REPORT 1.2.pdf

3701-KOLNP-2006-REPLY TO EXAMINATION REPORT.pdf

abstract-03701-kolnp-2006.jpg


Patent Number 249665
Indian Patent Application Number 3701/KOLNP/2006
PG Journal Number 44/2011
Publication Date 04-Nov-2011
Grant Date 01-Nov-2011
Date of Filing 08-Dec-2006
Name of Patentee OERLIKON HEBERLEIN TEMCO WATTWIL AG
Applicant Address BLEIKENSTRASSE 11, 9630 WATTWIL
Inventors:
# Inventor's Name Inventor's Address
1 BUCHMULLER, PATRICK LUTISMUHLE,CH-9643, KRUMMENAU,SWITZERLAND
PCT International Classification Number D02G1/04; D02G1/16
PCT International Application Number PCT/CH2005/000359
PCT International Filing date 2005-06-29
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 1109/04 2004-06-30 Switzerland