GB2499321A

GB2499321A - Joining a sliver channel to a rotary plate in a sliver-coiling device

Info

Publication number: GB2499321A
Application number: GB1302117.5A
Authority: GB
Inventors: Michael Scha Renkra Mer
Original assignee: Truetzschler GmbH and Co KG
Current assignee: Truetzschler GmbH and Co KG
Priority date: 2012-02-07
Filing date: 2013-02-06
Publication date: 2013-08-14
Also published as: GB201302117D0

Abstract

A coiler plate (19 fig. 1) for a sliver-coiling device, comprises a sliver channel 20 having an inlet 20a and an outlet 20b for sliver and having a rotary means such as a rotary plate 21 or a cover 22, the rotary plate 21 or cover 22 having a through-opening and the sliver channel 20 is joined to the cover 22 or rotary plate 21 by means of a joining method for metal materials. The joining method may be laser beam welding or soldering. The cover 22 may be provided on the underside of the rotary plate 21. The cover 22 and sliver channel 20 may be made from wear resistant, low friction, metal material such as special steel. The rotary plate 21 may be cast aluminium. The through-opening may be oval or kidney shaped and may be formed by laser beam cutting after the sliver channel 20 is joined to the rotary means. The sliver-coiling device may be used on a spinning room preparation machine, especially a carding machine, draw frame, combing machine or the like.

Description

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Device on a spinning room preparation machine, especially a carding machine, draw frame, combing machine or the like, having a coiler plate for sliver-coiling devices

5 The invention relates to a device on a spinning room preparation machine, especially a carding machine, draw frame, combing machine or the like.

It is known in spinning room preparation machines that generate fibre sliver to provide a sliver-coiling 10 device with a coiler plate comprising a sliver channel having an inlet and an outlet for sliver and having a rotary plate, wherein the sliver channel is joined to the rotary plate and a cover is provided on the underside of the rotary plate, the rotary plate and the cover having a 15 through-opening.

In a known coiler plate (EP-A-0 670 281), a round tube, as starting material, is deformed to form a three-dimensionally curved sliver channel. In the semi-finished product, the outlet bend is followed by a straight portion 20 which is separated during completion of the sliver channel. The outlet of the sliver channel is so constructed that it terminates level with the base of the rotary plate. The base of the rotary plate has a through-opening, the internal diameter of which is greater than 25 the external diameter of the outlet of the sliver channel, so that a gap is created. The gap and the opening are made when the rotary plate is being cast. The panel-like cover of the rotary plate on the underside thereof likewise has a through-opening, the internal diameter of the cover 30 terminating flush with the outer wall of the sliver tube outlet. During assembly, the outlet of the sliver tube outlet is inserted through the opening of the rotary plate into the opening of the cover. A casting compound is then introduced in such a way that the sliver channel is fixed 35 at an outlet by the casting compound, the site of introduction being so covered by the panel-like cover that only

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the open cross-section of the sliver channel is exposed. A disadvantageous aspect is the considerable amount of effort required in terms of manufacturing and assembly. In particular, care must be taken when fixing sliver channel 5 into the rotary plate with the casting compound. The casting compound is expensive. A further problem is the considerable amount of time required to close the gap between the rotary plate and the sliver tube outlet. Finally, the casting compound in the region of the join 10 between the sliver tube outlet and the cover is critical, because, in the event of damage or the like to the casting compound, fibre material can undesirably become caught thereon, thus impairing the production rate and the quality.

15 It is an aim of the invention to provide a coiler plate of the kind described at the beginning which avoids or mitigates the mentioned disadvantages, which is of particularly simple construction and which allows simple manufacture and assembly.

The invention provides a sliver-coiling device for a spinning room preparation machine, having a coiler plate comprising a sliver channel having an inlet and an outlet for fibre sliver and rotary means through which the fibre sliver is delivered, the rotary means having a through-opening, wherein the sliver channel is joined to the rotary means by means of a joining method for metal materials.

20 Because the sliver channel is joined to the cover by means of a metal joining method, preferably by laser welding, fixing the sliver channel by means of a casting compound and the finishing work associated therewith are unnecessary. According to the invention, the sliver 25 channel is securely joined to the cover by means of laser welding. A further advantage is that the opening in the rotary plate is made by a separation method, preferably by laser cutting. In that way, an opening of specified

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geometry can be exactly created. As a result of the treatment with a laser device in accordance with the invention, the coiler plate has exact geometry. The laser is suitable as a "tool" for reproducible specified geometry. Prefer-5 ably, the metal join between the sliver channel and the cover is subjected to careful further processing, for example by sanding and/or polishing. By virtue of the metal join between the sliver channel and the cover, flaking-off or the like of casting compound at that 10 location is effectively avoided.

In one advantageous embodiment the sliver channel is joined to the cover by welding. For example, the sliver channel may be joined to the cover by laser beam welding or by soldering. Advantageously, the cover is formed from 15 a wear-resistant material. Advantageously, the cover is formed from a low-friction material. Preferably, the cover is made of metal, for example, of special steel. Advantageously, the cover is of generally planar configuration. Advantageously, the face of the cover in 20 contact with the coiled fibre material is wear-resistant and low-friction. In one embodiment, the opening in the cover is approximately kidney-shaped. In another embodiment, the opening in the cover is substantially oval. Advantageously, sharp edges and transitions are 25 sanded. Advantageously, sharp edges and transitions are polished. Advantageously, the sliver channel is made of special steel.

In another embodiment, the outlet of the sliver channel is joined to the upper side of the rotary plate. 30 Advantageously, the outlet of the sliver channel is joined to the upper side of the closed rotary plate. Advantageously, the opening in the rotary plate is made from the underside of the rotary plate. In some embodiments, the sliver channel is joined to the rotary 35 plate by welding, for example, by laser beam welding. In another embodiment, the sliver channel is joined to the

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rotary plate by soldering. Advantageously, the opening in the rotary plate and/or in the cover is made by severing, or especially by cutting out. For example, the opening in the rotary plate and/or in the cover may be made by laser 5 beam cutting.

Advantageously, the rotary plate is made of cast material, for example cast aluminium.

In some embodiments, the outlet cross-section of the sliver channel is substantially oval. The opening in the 10 rotary plate may be substantially oval. Preferably, the cross-section of the sliver channel in the region between the sliver inlet and the sliver outlet is circular.

In one advantageous method of making the coiling device, the sliver channel is joined to the upper side of 15 the closed rotary plate and then the through-opening in the rotary plate is made.

In another advantageous method, the through-opening is made in the closed rotary plate and then the sliver channel is joined to the upper side of the rotary plate. 20 Advantageously, the sliver channel is joined to the cover by means of a welding process, especially laser beam welding, and the opening for passage of the sliver is made in the cover by means of a cutting process, especially laser beam cutting.

25 The coiler plate is advantageously used for sliver-

coiling devices on a spinning room preparation machine, especially a carding machine, draw frame, combing machine or the like.

Furthermore, the invention also provides a device on 30 a spinning room preparation machine, especially a carding machine, draw frame, combing machine or the like, having a coiler plate for sliver-coiling devices, comprising a sliver channel having an inlet and an outlet for sliver and having a rotary plate, wherein the sliver channel is 35 joined to the rotary plate and a cover is provided on the underside of the rotary plate, the rotary plate and the

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cover having a through-opening, wherein the sliver channel is joined to the cover by means of a joining method for metal materials.

5 Certain embodiments of the invention are described in greater detail below with reference to the accompanying drawings, in which:

Fig. 1 is a diagrammatic side view of a carding 10 machine with a can coiler that comprises a coiler plate for sliver in accordance with the invention;

Fig. 2 is a diagrammatic side view of the drafting 15 system of a draw frame having a coiler plate for sliver in accordance with the invention;

Fig. 3 shows a first embodiment of the coiler 20 plate according to the invention with a spinning can in longitudinal section, the sliver channel being joined to the cover by a welding method for metal materials;

25 Fig. 3a shows, partly in section, the through-

openings in the rotary plate and in the cover;

Fig. 3b shows, on an enlarged scale, the join 30 between the sliver channel and the cover and the rotary plate in the ready-to-use state;

35

Fig.

4a shows the welding of the end of the sliver channel to the upper side of the cover, the welding taking place from the direction of

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the underside of the cover;

Fig. 4b shows the through-opening being made in the cover from the direction of the underside 5 of the cover;

Fig. 5 shows the end of the sliver channel welded to the upper side of the closed cover;

10 Fig. 6 shows a further embodiment of the coiler plate according to the invention with a spinning can in longitudinal section;

Fig. 6a shows, partly in section, the through-15 openings in the rotary plate and in the cover;

Fig. 7 shows an end of the sliver channel welded to the upper side of the closed rotary 20 plate; and

Fig. 8 shows the through-opening of the rotary plate being made from the direction of the underside of the rotary plate.

25

With reference to Fig. 1 a carding machine, e.g. a TC flat card made by Trutzschler GmbH & Co. KG of Monchengladbach, Germany, has a feed roll 1, feed table 2, lickers-in 3a, 3b, 3c, cylinder 4, doffer 5, stripper roll 30 6, nip rolls 7, 8, web guide element 9, web funnel 10,

delivery rolls 11, 12, revolving card top 13 with card top guide rollers and flats, can 15 and can coiler 16. The directions of rotation of the rolls are indicated by curved arrows. Reference letter M denotes the centre point 35 (axis) of the cylinder 4. Reference numeral 4a indicates the clothing and reference numeral 4b indicates the

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direction of rotation of the cylinder 4. Arrow A indicates the working direction. Upstream of the carding machine there is arranged a tuft feed device 17. The coiler plate 19 is rotatably mounted in the coiler plate panel 18. The 5 coiler plate 19 comprises a sliver channel 20 having an inlet and an outlet (see Fig. 3) for sliver and a rotary plate 21 having on its underside a cover 22 (see Fig. 3). On simultaneous rotation of the can 15, the sliver 14 is coiled cycloidally in the can 15, so that the can 15 can 10 be filled uniformly with sliver. Reference letter A denotes the working direction.

According to Fig. 2, a draw frame, for example a TD draw frame made by Triitzschler GmbH & Co. KG, has a drafting system 26 having a drafting system inlet and a 15 drafting system outlet. The slivers 27, coming from cans (not shown), enter a sliver guide means and, drawn by the delivery rolls, are transported past a measuring element. The drafting system 26 is configured as a 4 over 3 drafting system, that is to say it consists of three lower 20 rolls I, II, III (I output lower roll, II middle lower roll, III input lower roll) and four upper rolls 28, 29, 30, 31. In the drafting system 26, the drafting of the fibre bundle 27, which consists of several slivers, is carried out. The drafting operation is composed of the 25 preliminary drafting operation and the main drafting operation. The roll pairs 6/III and 5/II form the preliminary drafting zone and the roll pairs 5/II and 3, 4/1 form the main drafting zone. In the drafting system outlet, the drafted slivers (fibre web 32) arrive at a web 30 guide means 33 and are drawn by means of delivery rolls 34, 35 through a sliver funnel 36 in which they are combined to form a sliver 37, which is then, by way of a can coiler 16 and coiler plate 19, coiled in sliver rings 38 in a can 39. The can 39 is in the form of a rectangular 35 can and in the course of sliver coiling moves to and fro below the coiler plate in the direction of arrows C and D.

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The coiler plate 19 comprises a three-dimensionally curved sliver channel 20 for sliver 37 and a rotary plate 21 having a cover 22 on its underside. Reference letter B denotes the running direction of the sliver bundle 27 5 through the drafting system 26. The coiler plate 19 is arranged in a coiler plate panel 18 (not shown in Fig. 2) which corresponds substantially to the coiler plate panel 18 in Fig. 1.

In the embodiment of Fig. 3, the sliver 37 (see Fig. 10 2) enters the inlet 20a of the three-dimensionally curved sliver channel 20, passes through the sliver channel 20 and then emerges from the sliver channel 20 again at outlet 20b. The sliver channel 20 is arranged eccentrically in the rotary plate 21. During the coiling 15 of the sliver, the rotary plate 21 rotates in the direction of arrow E about a rotational axis 41. The rotation of the rotary plate 21 about the rotational axis 41 brings about circular (ring-shaped) coiling of the sliver in the can 39.

20 In the region of its inlet 20a the sliver channel 20

is joined to a plate holder 21a. In the region of its outlet 20b the sliver channel 20 is securely welded to the upper side 22' of the cover 22 (see Fig. 5). The underside 21'' of the rotary plate 21 is provided with a cover 22, 25 for example a cover sheet made of special steel. Special steel is wear-resistant and low in friction with respect to the sliver 37 coiled in the can 39. In addition, mechanical processing (sanding, polishing) of the base of the rotary plate 21, which, preferably in the form of a 30 cast article, is made of aluminium or an aluminium alloy, is avoided. The cover 22 is arranged to lie closely against the underside of the rotary plate 21 and is affixed, for example, by adhesive bonding. The edge 22*, 22** of the cover 22 is bent up and rests against the 35 rotary plate 21. The rotary plate 21 has a through-opening 21a (see Fig. 3a) which allows passage of the sliver 37.

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The transitions 23', 23'' at the outlet of the through-opening 22a of the cover 22 are rounded. The cover 22 likewise has a through-opening 22a (see Fig. 3a) for passage of the sliver 37.

5 As shown in Fig. 3a, the opening 21a has a larger diameter than the opening 22a. In Fig. 3b, the join between the outlet 20b of the sliver channel 20 and the cover 22 and the rotary plate 21 is shown in the ready-to-use state. The circumferential edge of the tube end of the 10 sliver channel 20 is seated on the upper side 22' and is securely welded to the edge of the opening 22a. The inner wall surface of the outlet 20b of the sliver channel 20 ends flush with the inner wall surface of the opening 22a. Between the outer wall surface of the outlet 20b and the 15 inner wall surface of the opening 21a there is an annular cavity which is closed at the bottom by the cover 22 and is open at the top. That cavity is filled with a casting compound 50 which serves for stabilisation and for joining the sliver channel 20 to the rotary plate 21. In that way 20 the casting compound 50 comes into contact neither with the sliver 37 to be coiled nor with the coiled sliver rings 38 (see Fig. 3).

In accordance with Fig. 4a, the outlet 20b of the sliver channel 20 of the embodiment of Fig. 3, which is 25 made, for example, of a special steel tube, is positioned from below on the upper side 22'' of the closed cover 22 so as to be flush therewith. By means of a welding process, for example laser beam welding, the sliver channel 20 and the cover 22 are securely joined to one 30 another. Reference numeral 25 denotes the circumferential welded seam. The laser beam penetrates the cover 22 from the direction of the underside 22'' and securely welds the open end (edge) at the outlet 20b of the sliver channel 20 to the upper side 22' of the cover 22 (see Fig. 5). 35 Because the sliver channel 20 and the cover 22 are made of special steel, a trouble-free welded join can be made by

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laser beam welding.

In laser beam welding, a high-energy laser beam is converted into heat on striking and penetrating into the workpiece. The material melts and, on solidifying, forms 5 the welded seam. The welded seam is so thin that generally no additional material is required. Welding is carried out in vacuo or under protective gas, in some cases also in the open atmosphere. Focussing the beam onto a diameter of less than 1 mm results in the focal point having a high 10 energy density and temperatures of up to 20 000°C. The depth of the seam depends upon the material being welded, the power of the laser, the beam diameter and the rate of advance.

15 Advantages of laser beam welding:

• it can be used for virtually all materials and material combinations

• high rate of advance 20 • small seam width

• oxide-free welded seams when welding is carried out in vacuo or under protective gas

• very little distortion of components

• readily automatable

25 • high-strength welded join

The laser device for the laser beam welding is indicated by reference numeral 48 in Fig. 4a. For more details of the construction of a laser device, see the 30 description herein below in connection with a laser device 42 for laser beam fusion cutting.

The through-opening 22a in the cover 22 is then made from the direction of the underside 22' of the cover 22 by means of a severing method, for example laser beam 35 cutting. For that purpose, in accordance with Fig. 4b a cut-out portion (not shown) is severed from the closed

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cover 22 by means of cutting out. In that way, the through-opening 22a is formed in the cover 22. The transitions 23', 23'' at the outlet of the through-opening 22a of the cover 22 are then sanded and polished, so that 5 fibre material is effectively prevented from adhering thereto or becoming caught thereon.

The relative movement between the laser beam 43 and the cover 22 that is necessary for creating a continuous kerf can be realised in various ways. For laser severing, 10 the cover 22 can be moved below the fixed laser beam 43,

for example with the aid of an X/Y coordinate displacement device. Furthermore, for laser cutting, the laser source, including the cutting head, can be moved over the cover 22 or alternatively a movable mirror system, together with 15 the cutting head ("flying optics"), can be passed between the fixed laser apparatus and the cover 22.

In the case of laser beam fusion cutting in accordance with Fig. 4b using a laser device 42, the cutting is carried out using a laser beam 43 that is generated with 20 the aid of gases (gas laser) or crystals (solid laser) and is focussed by at least one lens 47 onto a very small area of the surface 22'' of the cover 22. The special steel of the cover 22 melts or vaporises and is blown out of the kerf by a gas jet 45. The cutting gas 46 is an inert gas, 25 generally nitrogen or argon, and is introduced through an inlet into the cutting nozzle 47.

The laser beam 43 can operate in open space or can be passed through a medium, such as oil or water. The laser power and the cutting rate need to be matched to the type 30 of material (special steel) and the thickness of the material.

The invention has been explained on the basis of an example wherein the sliver channel 20 is joined to the upper side 22' of the closed cover 22 and then the 35 through-opening 22a is made in the cover 22. The invention equally encompasses a form according to which the through-

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opening 22a is made in the closed cover 22 and then the sliver channel 20 is joined to the upper side 22' of the cover 22.

In the embodiment of Fig. 6, the sliver 37 (see Fig.

5 2) enters the inlet 20a of the three-dimensionally curved sliver channel 20, passes through the sliver channel 20 and then emerges from the sliver channel 20 again at outlet 20b. The sliver channel 20 is arranged eccentrically in the rotary plate 21. During the coiling 10 of the sliver, the rotary plate 21 rotates in the direction of arrow E about a rotational axis 41. The rotation of the rotary plate 21 about the rotational axis 41 brings about circular (ring-shaped) coiling of the sliver in the can 39.

15 In the region of its inlet 20a the sliver channel 20

is joined to a plate holder 21a. In the region of its outlet 20b the sliver channel 20 is securely welded to the upper side 21' of the rotary plate 21. The underside 21'' of the rotary plate 21 is provided with a cover 22, for 20 example a cover sheet made of special steel. Special steel is wear-resistant and low in friction with respect to the sliver 37 coiled in the can 39. In addition, mechanical processing (sanding, polishing) of the base of the rotary plate 21, which, preferably in the form of a cast article, 25 is made of aluminium or an aluminium alloy, is avoided. The cover 22 is arranged to lie closely against the underside of the rotary plate 21 and is affixed, for example, by adhesive bonding. The edge 22', 22'' of the cover 22 is bent up and rests against the rotary plate 21. 30 The rotary plate 21 has a through-opening 21a (see Fig.

6a) which allows passage of the sliver 37. The transitions 23', 23'' at the outlet of the through-opening are rounded. The cover 22 likewise has a through-opening 22a (see Fig. 6a) for passage of sliver 37.

35 With reference to Fig. 7, the outlet 20b of the sliver channel 20 of the embodiment of Fig. 6, which is

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made, for example, of a special steel tube, is positioned from above on the upper side 21' of the closed rotary plate 21, made, for example, of cast aluminium, so as to be flush therewith. By means of a welding process, for 5 example laser beam welding, the sliver channel 20 and the rotary plate 21 are securely joined to one another. Reference numeral 24 denotes the circumferential welded seam.

The through-opening 21a in the rotary plate 21 is 10 then made from the direction of the underside 21'' of the rotary plate 21 by means of a severing method, for example laser beam cutting. For that purpose, in accordance with Fig. 8 a cut-out portion (not shown) is severed from the closed rotary plate 21 by means of cutting out. In that 15 way, the through-opening 21a is formed in the rotary plate 21.

The relative movement between the laser beam 43 and the rotary plate 21 that is necessary for creating a continuous kerf can be realised in various ways. For laser 20 severing, the rotary plate 21 can be moved below the fixed laser beam 43, for example with the aid of an X/Y coordinate displacement device. Furthermore, for laser cutting, the laser source, including the cutting head, can be moved over the rotary plate 21 or alternatively a 25 movable mirror system, together with the cutting head

("flying optics"), can be passed between the fixed laser apparatus and the rotary plate 21.

In the case of laser beam fusion cutting in accordance with Fig. 8 using a laser device 42, the cutting is 30 carried out using a laser beam 43 that is generated with the aid of gases (gas laser) or crystals (solid laser) and focussed by at least one lens 47 onto a very small area of the surface 21'' of the rotary plate 21. The aluminium of the rotary plate 21 melts or vaporises and is blown out of 35 the kerf by a gas jet 45. The cutting gas 46 is an inert gas, generally nitrogen or argon, and is introduced

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through an inlet into the cutting nozzle 47.

The laser beam 43 can operate in free space or can be passed through a medium, such as oil or water. The laser power and the cutting rate need to be matched to the type 5 of material (aluminium) and the thickness of the material.

The latter embodiment of the invention has been explained on the basis of an example wherein the sliver channel 20 is joined to the upper side 21' of the closed rotary plate 21 and then the through-opening 21a is made 10 in rotary plate 21. The invention equally encompasses a form according to which the through-opening 21a is made in the closed rotary plate 21 and then the sliver channel 20 is joined to the upper side 21' of the rotary plate 21.

In this specification a sliver channel is joined to the cover of a rotary plate or to the rotary plate by means of a joining method for metal materials. Joining methods for metal materials are in particular joining methods in which the members made of metal materials are joined together by a metallic join. For example, a metallic join may be present in the form of a different metal (for example, as in soldering), or may be present in the form of the metal of one or both members (for example, as in welding, e.g. laser welding).

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Claims

1. A sliver-coiling device for a spinning room preparation machine, having a coiler plate comprising a sliver channel having an inlet and an outlet for fibre sliver and rotary means through which the fibre sliver is delivered, the rotary means having a through-opening, wherein the sliver channel is joined to the rotary means by means of a joining method for metal materials.

2. A device according to claim 1, wherein the rotary means comprises a rotary plate and a cover provided on the underside of the rotary plate.

3. A device according to claim 2, wherein the sliver channel is joined to the cover by welding.

4. A device according to claim 2 or claim 3, wherein the sliver channel is joined to the cover by laser beam

5 welding.

5. A device according to any one of claims 2 to 4, wherein the sliver channel is joined to the cover by soldering.

6. A device according to any one of claims 2 to 5, 10 wherein the cover is formed from a wear-resistant material.

7. A device according to any one of claims 2 to 6, wherein the cover is formed from a low-friction material.

8. A device according to any one of claims 2 to 7, 15 wherein the cover is made of metal.

9. A device according to any one of claims 2 to 8, wherein the cover is made of special steel.

10. A device according to any one of claims 2 to 9, wherein the cover is a substantially planar member.

20

11. A device according to any one of claims 2 to 10,

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wherein the face of the cover that is in contact with the coiled fibre material is wear-resistant and low-friction.

12. A device according to claim 2, the outlet of the sliver channel is joined to the upper side of the rotary

5 plate.

13. A device according to claim 12, wherein the outlet of the sliver channel is joined to the upper side of the closed rotary plate.

14. A device according to claim 12 or claim 13, wherein

10 the opening in the rotary plate is made from the underside of the rotary plate.

15. A device according to any one of claims 12 to 14, wherein the sliver channel is joined to the rotary plate by welding.

15

16. A device according to any one of claims 12 to 15, wherein the sliver channel is joined to the rotary plate by laser beam welding.

17. A device according to any one of claims 12 to 14, wherein the sliver channel is joined to the rotary plate

20 by soldering.

18. A device according to any one of claims 2 to 17, wherein the rotary plate is made of cast material, for example cast aluminium.

19. A device according to any one of claims 2 to 18,

25 wherein the opening in the rotary plate is substantially oval.

20. A device according to any one of claims 2 to 19, wherein the opening in the cover and/or the rotary plate is approximately kidney-shaped.

30

21. A device according to any one of claims 2 to 19,

wherein the opening in the cover and/or the rotary plate is substantially oval.

22. A device according to any one of claims 2 to 21, wherein the opening in the rotary plate and/or in the

35 cover is made by cutting.

23. A device according to any one of claims 2 to 22,

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wherein the opening in the rotary plate and/or in the cover is made by cutting out.

24. A device according to any one of claims 2 to 23, wherein the opening in the rotary plate and/or in the

5 cover is made by laser beam cutting.

25. A device according to any one of claims 1 to 24, wherein sharp edges and transitions are sanded and/or polished.

26. A device according to any one of claims 1 to 25, 10 wherein the sliver channel is made of special steel.

27. A device according to any one of claims 1 to 26, wherein the outlet cross-section of the sliver channel is substantially oval.

28. A device according to any one of claims 1 to 27, 15 wherein the cross-section of the sliver channel in the region between the sliver inlet and the sliver outlet is circular.

29. A device on a spinning room preparation machine, especially a carding machine, draw frame, combing machine

20 or the like, having a coiler plate for sliver-coiling devices, comprising a sliver channel having an inlet and an outlet for sliver and having a rotary plate, wherein the sliver channel is joined to the rotary plate and a cover is provided on the underside of the rotary plate, 25 the rotary plate and the cover having a through-opening,

wherein the sliver channel is joined to the cover by means of a joining method for metal materials.

30. A sliver-coiling device substantially as described herein with reference to and as illustrated by any of

30 Figs. 1, 2, 3, 3a, 3b, 4a, 4b, 5, 6, 6a, 7 and 8.

31. A method for making a device according to any one of claims 1 to 30, wherein the sliver channel is joined to the upper side of the closed rotary plate or cover and then the through-opening in the rotary plate or cover is

35 made.

32. A method for making a device according to any one of

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claims 1 to 30, wherein the through-opening is made in the closed rotary plate or cover and then the sliver channel is joined to the upper side of the rotary plate or cover.

33. A method of producing a device according to any one 5 of claims 1 to 30, wherein the sliver channel is joined to the cover or rotary plate by means of a welding process, especially laser beam welding, and the opening for passage of the sliver is made in the cover or rotary plate by means of a cutting process, especially laser beam cutting.

10

34. A method for making a coiler plate for a sliver-

coiling device, comprising joining a sliver channel outlet to rotary means by means of metallic seam means.

35. A method according to claim 34 the sliver, wherein the sliver channel and, at least in the region of

15 attachment, the rotary means, are of metal.

36. A method according to claim 35, wherein the metallic seam is formed by soldering or welding.

37. A spinning room preparation machine comprising a coiling device in accordance with any one of claims 1 to

20 30.

38. A spinning preparation machine according to claim 37, wherein the machine is a carding machine, draw frame or combing machine.

INTELLECTUAL

PROPERTY OFFICE

Application No: GB1302117.5 Examiner: Mr Karl Whitfield

Claims searched: 1 to 29 and 31 to 38 Date of search: 3 June 2013

Patents Act 1977: Search Report under Section 17

Documents considered to be relevant: