EP1055751A2 - Combing machine with several combing heads - Google Patents

Abstract

The combing machine, with a number of combing heads, is followed by an inclined conveyor (2) to carry the band of slivers directly after the final combing head (1). A calender roller (24) is at the lower conveyor deflection roller (22). The upper deflection roller (23) of the inclined conveyor (2) is close to the plane of the take-in rollers of the sliver drawing unit (3). final rollers of the drawing unit (3) are close to and above the funnel (51) of the station (5) to lay the drawn sliver in cans. A common frame (6) supports the drawing unit (3), the sliver laying station (5) with the funnel and paired calender rollers (52) and the spiral coil laying wheel (54), and the upper deflection roller (23) of the inclined conveyor (2), as an integrated compo group. A web funnel (41) is at the final rollers of the drawing unit (3), with a station (4) to form the sliver, with a connecte guide tube for the sliver (93). A twisting jet, with a connected pressure line, opens into the guide tube with a control valve. web funnel (41) swings at the free end of a lever (44), mounted to the frame (6), between a working position (4) and a service position. In the working position (4), the web funnel (41) lies in front of the clamping gap at the exit rollers of the drawing (3) and the outlet opening of the guide tube at the funnel (51) of the sliver laying station (5). In the service position, the w funnel (41) is swung upwards and outwards from the final drawing rollers. Guides (30) are between the upper deflection roller (2 of the inclined conveyor (2) and the leading rollers of the drawing unit (3), to restrict the width of the band of slivers. A central drive is at the frame (6), with gearing stages through toothed or flat belts. The drive also has a transmission link to rotating plate to rotate the sliver can (55). A monitor is at the calender rollers (52) of the sliver laying station (5), to mea the sliver (93) thickness. A separate motor with a control unit drives the final drawing rollers of the drawing unit (3), and th components which are synchronized with them. The upper drawing rollers are loaded by membrane pistons for the required forces on them. The drawing unit (3) is angled downwards to the exit side, towards the funnel (51) of the sliver laying station (5). The u drawing rollers have a play of 0.5-3.0 mm. At least one defining suction channel is over each upper drawing roller, and all the suction channels lead to a common suction zone. An air guide plate is over each suction channel.

Description

The invention relates to a combing machine with a plurality of combing heads, with a drafting unit assigned to the combing heads, with a sliver laying device which has a rotatable tubular wheel above a rotatable can for storing sliver, the individual headbands of the combing heads being fed close to one another as sliver coulter to the drafting device and there a nonwoven web are stretched and the nonwoven web is combined into a fiber band by means of a nonwoven funnel near the nip of the output rollers of the drafting system and fed to the funnel of the tubular wheel via guide means.
A combing machine of the type described is known, inter alia, from DE 196 40 855. In this machine, which is preferably designed for combing cotton, the individual headbands coming from the combing heads are guided on the so-called table of the combing machine by guide elements, placed against one another laterally and fed to a drafting system approximately in the plane of the table.
The exit rollers of the drafting system guide the drawn nonwoven web into a nonwoven funnel. The guide tube arranged downstream of the fleece funnel is equipped with a swirl nozzle which can briefly generate a spiral of air movement in the guide tube if the fiber sliver is inserted. The solidifying tip of the sliver passes through the guide tube between the lower guide roller and another calender roller of an ascending conveyor.
This calender roller presses the thin sliver onto the surface of the conveyor belt. The upper guide roller of the ascending conveyor belt is provided with a large diameter. A curved baffle plate prevents uncontrollable warping in the area of the upper guide roller due to the considerable centrifugal force acting at very high speed. This baffle plate should lead the sliver with its still firm tip forward into the funnel, which is part of a sliver laying device. In a manner known per se, the funnel is assigned calender rolls and a tubular wheel driven underneath for the spiral-shaped sliver storage.
Such an arrangement is particularly noticeable at higher operating speeds of the comber. The high speed with which the sliver is moved on the ascending conveyor leads in many situations to incorrect drawing or to an uncontrolled running of the sliver. The automatic insertion of the sliver is fraught with considerable uncertainties.
A similar combing machine is shown in DE 41 19 877 A1. Here, too, the individual headbands are combined to form a fiber ribbon share and are guided via a relatively short, upwardly bent guide plate in the vicinity of a slightly higher drafting system. The drafting system or the lower rollers of this drafting system are arranged in an upwardly inclined plane and guide the fleece belt combined on a baffle plate through guide rollers onto the conveyor belt of an ascending conveyor.
Above the sliver laying device, the sliver is fed down a relatively small roll into the calender rolls of a hose wheel belonging to the sliver laying device.
Such a device is also highly unsatisfactory with regard to the quality of the sliver produced. An attempt is made to solve the problems at hand by regulating the drafting system and to regulate the thickness of the sliver as precisely as possible.

Several donors check the current values for the thickness of some of the individual headbands, the fiber band share and finally the stretched fiber band. The compensation takes place by changing the drawing speed of the drafting system. Complicated monitoring devices are necessary to coordinate the work of the combing heads and the drafting system with one another.
There are no prerequisites for automatic insertion of the sliver.

On lines that only fulfill the stretching function, it is common to arrange the drafting system in a position that is close to and laterally above the sliver laying device. Such a device is described by way of example in DE 16 85 578.
The transfer of such an arrangement to combing machines with several combing heads has not yet been found. It is obviously not possible there. A comber has several operating areas which are arranged differently in terms of their function.
The operating height of the combing heads is approximately at shoulder height on the feed side of the coils to the combing heads. It is already extremely difficult to manipulate the windings with considerable weight at this height. The operating height on the output side of the individual headbands, on the other hand, is only at waist height or below.
For the reason of the extreme sensitivity of these newly soldered single headbands combined into a group, any manipulation with this fiber band group that is not absolutely necessary has been strictly avoided.
This sliver of coulters was expected to be pulled into the drafting system on a slightly inclined plane. In this way you could at least work on the drafting system at normal operating height.
The transport of the stretched fiber sliver, the fibers of which are now evenly distributed in the longitudinal direction, upwards into the area of the fiber sliver laying device has so far not caused any fundamental problems.

The sliver, which was quite stable in itself, was regularly brought to the desired height with a climbing conveyor, as already described above.
The resulting delays were brought under control with increasingly complex control processes, and even the working speed of the combing heads was included in the control process.
The automatic drawing of the drawn sliver into the nip of the calender rolls of the sliver laying device remained an unsolved problem despite repeated attempts.

The object of the present invention is now to create a comber with several combing heads, with a drafting device and with a sliver laying device, in which the sliver finally produced and to be laid down can be conveyed into the can without errors, even at high working speed, and with simple means, the beginning of a sliver can be guided automatically and with high reliability from the drafting device into the nip of the calender rolls of the sliver laying device from there into the can.

This object is achieved in a surprisingly simple manner by the features of claim 1.
The feeding of the previously compressed and pressed onto the conveyor belt sliver from the table level of the comber to the height of the sliver laying device takes place at a relatively low speed.
It has been shown that with such a transport process, even with a relatively steep angle of rise of the ascending conveyor, neither the individual fiber tapes detach from one another nor the still sensitive fiber tapes are subject to incorrect distortion. The sliver can also be easily removed from the conveyor belt after transport and then stretched.

The highly sensitive fiber sliver that is formed after about twenty times warping is only created very close to and above the sliver laying device and can be automatically inserted into the nip of the calender rolls there. It is no longer subject to a delay due to the now very short path. Control devices with complicated actual value recordings and control processes can be limited to the absolutely necessary extent by this arrangement.
In particular, by assembling the assemblies according to claim 2, the assembly of the entire arrangement is also simplified. In a separate assembly station, all of the assemblies that are effective in the network can be mounted on a common support frame and adjusted to each other in a functional manner.
With the embodiment according to claim 3, the prerequisites are created that the front end of the nonwoven belt at the outlet of the drafting system is automatically combined by the belt forming unit, shaped to a tip and can be reliably guided into the tubular wheel without additional manual operations.
The storage of the fleece funnel with its guide tube at a pivot point which can be pivoted about a bearing of the support frame - according to claim 4 - permits simple operation of the arrangement. When the belt forming unit is swung out, the nonwoven web is torn off close to the nip of the output rollers of the drafting system. The fleece funnel is then brought into the working position, a swirl flow in the guide tube ensures the compression of the fleece band to form the sliver to form a twisted band tip and for the transport of the tip to between the calender rolls of the sliver laying device.
With the use of the guide elements defined in claim 5, it is ensured that the sliver coulter is laterally compressed again before it enters the drafting system.

It has proven to be expedient to assign the drive elements fed to the assemblies arranged on a common support frame and to design the necessary gear stages as toothed or flat belt drives. This significantly reduces noise development.
The drive for the rotary plate of the can can also be derived from this central drive.
The modification of the drive according to claim 8 allows a correction of the strip thickness to be deposited by changing the angular speed of the pair of output rollers of the drafting system. With this control arrangement you can compensate for up to 70% of all possible differences. The arrangement of the sensor on the calender rollers of the sliver laying device is only a few centimeters from the output rollers of the drafting system, so that the majority of the necessary corrections can be carried out successfully.
The modifications of the drafting system according to claims 9 to 11 reduce the construction effort on the one hand. On the other hand, they allow the drafting system to function at high quality and at the same time ensure that it can be operated easily.
The design of the cleaning device according to claim 12 ensures permanent cleaning of the drafting system with simple technical means.

Fig. 1

eine schematische Seitenansicht der Führungsanordnung der Faserbandschar zum Streckwerk und des verstreckten Faserbandes von dort bis in die Kanne,

Fig. 2

eine schematische Darstellung der Führung der Einzelkopfbänder und der Bildung der Faserbandschar auf dem Tisch der Kämmmaschine in einer Ansicht von oben,

Fig. 3

einen vereinfachten Querschnitt durch das Streckwerk, durch die obere Führungswalze des Förderbandes, durch die Bandbildungseinheit und die Kalanderwalzen der Faserbandablegevorrichtung,

Fig. 4

eine vereinfachte Ansicht auf die Führungselemente für die Faserbandschar am Eingang des Streckwerkes in Laufrichtung der Faserbandschar betrachtet,

Fig. 5

eine schematische Darstellung der Belastungsanordnung für die Oberwalzen des Streckwerkes,

Fig. 6

einen Querschnitt durch die Reinigungsanordnung für die Oberwalzen des Streckwerkes und

Fig. 7

einen vereinfachten Getriebeplan für die Funktionselemente der beschriebenen Vorrichtung.

The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawings show

Fig. 1

2 shows a schematic side view of the guide arrangement of the fiber sliver coulter to the drafting system and the drawn fiber sliver from there to the can,

Fig. 2

1 shows a schematic representation of the guidance of the individual headbands and the formation of the fiber band share on the table of the comber in a view from above,

Fig. 3

a simplified cross section through the drafting system, through the upper guide roller of the conveyor belt, through the belt forming unit and the calender rollers of the sliver laying device,

Fig. 4

a simplified view of the guide elements for the fiber ribbon share at the entrance of the drafting unit viewed in the running direction of the fiber ribbon share,

Fig. 5

a schematic representation of the load arrangement for the top rollers of the drafting system,

Fig. 6

a cross section through the cleaning arrangement for the top rollers of the drafting system and

Fig. 7

a simplified transmission plan for the functional elements of the device described.

The invention is described using a cotton combing machine which is equipped with a large number of combing heads 1. A so-called individual head band 9 is produced on each combing head 1 and is placed in the plane of the table 11 around band guides 12 and under pressure laterally against the fiber band share 91 which has already been placed and which in turn is supported on the boundary wall 13. The sliver sheet 91 formed in this way is guided in a short, laterally delimited flat channel in the plane of the table into the area of an ascending conveyor 2.
The ascending conveyor 2 consists of an endless conveyor belt 21 which is guided around a lower guide roller 22 near the table level and around an upper guide roller 23 approximately at the height of the drafting system 3. The plug-in unit 3 is located approximately at the level of the sliver laying device 5, preferably above the calender rolls 52 thereof and laterally not far from the funnel 51, which guides the hidden sliver 93 between the clamping zone of the pair of calender rolls 52.
The endless conveyor belt 21 conveys the fiber ribbon share 91 at an angle of approximately 45 ° upwards. The calender roller 24, which presses the fiber ribbon sheet 91 against the ascending conveyor belt 21 in a force-fitting manner near the lower guide roller 22, ensures better adhesion of the fiber ribbon sheet 91.

In the area of the upper guide roller 23 of the conveyor belt 21, the fiber band share 91 passes between the input rollers 31 of the drafting device 3 via a guide element 30 (see FIG. 4) which is curved in the middle and is slightly deflected downward. The guide element 30 ensures that the individual head belts 9 are brought together again uniformly within the fiber band coulter 91, so that during the subsequent draft in the drafting system 3 a non-woven band 92 is produced which is uniform over the width.
The fleece belt 92 emerging from the exit rollers 33 of the drafting unit 3 is combined into a fiber sliver by a flat fleece funnel 41. In the center of the fleece funnel 41, the guide tube 42 connects, which extends to the opening of the funnel 51 of the sliver laying device 5. This guide tube 42 is equipped with a swirl nozzle 43, to which a pressure line 431 is assigned. This swirl nozzle 43 provides a spiral air flow within the guide tube 42, which is directed to the funnel 51. This spiral air flow is relatively weak during normal operation, but is increased in a pulsed manner when a new sliver has to be introduced.
This function is explained in more detail when looking at FIG. 3 in more detail. The sliver 93, which emerges from the bottom of the funnel 51, is captured by the calender rollers 52, further compressed and conveyed into the hose tube 541 of the hose wheel 54 of the sliver laying device 5.

Further details of this arrangement will be explained again in detail with reference to FIGS. 3 and 4. The drafting system 3 used here has three roller units, the feed rollers 31, the intermediate rollers 32 and the output rollers 33. The input rollers 31 consist of the two lower rollers 311 and 312 and the upper roller 313. Both lower rollers 311, 312 are driven at different angular speeds. The upper roller 313 presses the sliver 91 on the lower rollers 311, 312. A sufficiently large play (0.5 to 3 mm) within the vertical guide ensures a uniform contact force of the upper roller 313 on both lower rollers 311, 312. These feed rollers 31 are followed by the roller unit the intermediate rollers 32. This roller unit is designed analogously to the feed rollers 31. It consists of the lower rollers 321, 322 and the upper roller 323.
The end forms the output roller pair 33, which consists of the driven lower roller 331 and the loaded upper roller 332.
The angular velocity of the intermediate rollers 32 is significantly higher than the angular velocity of the feed rollers 31. The output rollers 33 then take care of the final distortion size and can expediently also be regulated to compensate for the distortion depending on a measured strip thickness with regard to their angular velocity.
The thin fleece band 92 emerging from the exit rollers 33 initially still has a width which corresponds approximately to the width of the fiber band share 91. This fleece band 92 is combined by a fleece funnel 41 to form a fiber band 93 and pneumatically guided and conveyed in the guide tube 42.
The operation of the fleece funnel 41, the swirl nozzle 43 and the guide tube 42 is described in detail in the German patent application 196 40 855 A1.
In the present case, the guide tube 52 lies with an approximately horizontal cut surface on the upper opening of the funnel 51. This funnel 51 further compresses the sliver 93 and guides it into the nip of the calender rolls 52.
These calender rolls 52 can be stepped in their peripheral area in a manner known per se, so that they are also suitable for measuring the thickness of the sliver. These calender rolls 52 convey the sliver 93 into the hose tube 541 of the hose wheel 54.

The belt forming unit 4, consisting of fleece funnel 41, guide tube 42 and swirl nozzle 43 with pressure line 431, can be pivoted from a working position 4 into an operating position 4 'on a lever 44 which can be pivoted about the frame-fixed bearing 65. The swivel angle between the two positions is selected so large that one can manipulate the nonwoven belt 92 unhindered by hand before the nip of the output rollers 33.
If you want to automatically insert the fiber sliver 93 into the guide elements up to the can 55, then the fleece sliver 92 is torn off uniformly and briefly over the entire width at the nip line of the output roller pair 33. Once this has been done, the banding unit 4 is brought into the working position. Simultaneously with the start of the drafting system 3, a circulating air flow of high speed is generated in the guide tube 42 via the swirl nozzle 43. The negative pressure which arises in the fleece funnel 41 ensures that the fleece band 92 is combined to form the fiber band 93 without any problems and is sucked into the guide tube 42.
The extremely powerful swirl of this air flow leads to the tip of the sliver 93 being twisted into a stable, wedge-shaped fiber formation, which can then also be guided in the hopper 51 through its narrow lower opening into the nip of the calender rolls 52. At this point, all difficulties for guiding this sliver are practically overcome.

The still compacted tip of the sliver 93 also reaches the slowly rotating can 55 via the rapidly rotating hose wheel 54. The sliver 93 is deposited there in a manner known per se in a spiral.
As soon as the tip of the sliver 93 has passed through the calender rolls 52, the pressure of the swirl flow can be reduced. The remaining pressure of this flow is only so great that the friction of the sliver 93 in the guide tube 42 can be kept low and there is no misalignment.

The drafting system 3 is known per se with regard to its basic structure and the arrangement of the rollers. It should be noted that the upper rollers 313, 323, 332 are guided transversely to the direction of travel of the fiber sliver coulter 91 with a sufficiently large amount of play, so that the upper rollers 313, 323 of the feed rollers 31 and the intermediate rollers with evenly distributed forces on their lower rollers 311, 312, 321 , 322 can press.
The loading of the upper rollers 313, 323, 332 is shown in FIG. 5 as a basic illustration. The plungers 342, 343, 344 act on the two bearings of the upper rollers 313, 323, 332. On the widened heads of these plungers 342, 343, 344 there is a flat membrane piston 341 at the top, which in turn is supported at the top on a fixed plate of the housing 340.
The pressure in this membrane piston 341 is adjustable and is transferred uniformly to the top rollers 313, 323, 332 regardless of the respective thickness of the sliver 93.
6 shows another special feature of the drafting system 3 with regard to its cleaning arrangement. Suction channels 351, 352, 353 are arranged along and above the functional section of the upper rollers 313, 323, 332.
Limited elastic lips are attached to the walls of the suction channels 351, 352, 353 which run along the surface lines of the upper rollers 313, 323, 332 and which end at a short distance above the upper rollers 313, 323, 332. A strong air flow occurs through the gaps between the lips and the upper rollers 313, 323, 332, so that fibers adhering to the upper roller 313, 323, 332 immediately, first into the suction space 36 above the suction channels 351, 352, 353 and then from there be guided into the suction line 362.
The suction channels 351, 352, 353 can be adjusted in their carrier towards the upper rollers 313, 323, 332, so that the respective gap can be adjusted depending on the average thickness of the fiber band share 91 on the respective roller arrangement.
It has proven to be advantageous to arrange air baffles 361 above each suction channel 351, 352, 353, which are inclined upward and in the direction of the suction line. In addition to the orientation of the flow, they prevent relatively large-volume collections of fibers from penetrating into the suction channel 352, 353 which follows downward.

Due to the compact arrangement of the assemblies of the drafting unit 3, the band forming unit 4 and the sliver laying device 5, it is possible to arrange essential parts of these assemblies on a support frame 6 in a very small space.
In the upper area of this support frame 6, the drafting system 3 has its bearing 61. Near the input rollers 31 of this drafting system 3, the upper guide roller 23 of the ascending conveyor 2 has its bearing 62. On the output side of the drafting system 3, the lever 44 has the belt forming unit 4 attached to it , his bearing 65. This is conveniently located beyond and below the nip of the calender rollers 52 of the sliver laying device 5.
On the underside of this support frame 6, the hose wheel 54 can also be guided in the bearing 64.
This structural unit designed in this way can be completely pre-assembled on the support frame 6. All necessary settings can be made in the pre-assembly. After this support frame 6 has been inserted, only the transmission links leading to a central drive need be installed and adjusted.
The central drive of this arrangement described is derived in the present example from the drive of the round comb shaft 7. This round comb shaft 7 is driven by a separate motor 71 and transmits its rotary movement to the central drive shaft 72 via corresponding gear members. From this central drive shaft 72, the upper guide roller 23 of the ascending conveyor 2 and a lower roller 311, 321, 331 of each roller arrangement are provided via toothed belts 31, 32, 33 driven.
The same drive is also fed to the pair of calender rolls 52 of the sliver laying device 5.

The respective second lower rollers 312, 322 of the roller arrangements are opened the opposite side by small toothed belt drives of their respective assigned lower roller driven.

The tubular wheel 54 is also driven by the drive movement of the calender rollers 52 of the sliver laying device 5 via a bevel gear stage and corresponding toothed and flat belts. The drive of the can 55 for storing the sliver 93 is also derived from here. The so-called turntable 56 is driven via a worm or helical gear and a correspondingly long flat belt drive, on which the can 55 is detachably placed.
According to an embodiment not shown, this drive can be modified. For example, a separate, controllable servo motor can be assigned to the pair of output rollers 33 of the drafting unit 3, which servo receives control pulses from the actual values of the encoder 53 on the calender rollers 52 via a processor unit and corrects the amount of distortion. The drive of the sliver laying device 5, up to the turntable 56, should also be coupled to this regulated drive.

Reference list

1

Comb heads

11

table

12th

Tape guide

13

Boundary wall

2nd

Ascending conveyor

21

Ascending conveyor belt

22

Guide roller, bottom

23

Guide roller, top

24th

Calender roll

3rd

Drafting system

30th

Guide element

31

Infeed rollers

311

Bottom rollers

312

Bottom roller

313

Top roller

32

Intermediate rolls

321, 322

Bottom roller

323

Top roller

33

Output roller

331

Bottom roller

332

Top roller

34

Charge arrangement

340

casing

341

Membrane piston

342, 343, 344

Pestle

35

Suction arrangement

351,352,353

Suction channels

36

Suction chamber

361

Air baffles

362

Suction line

(4)

Band formation unit (working position)

4 '

Band formation unit (operating position)

41

Fleece funnel

42

Guide tube

43

Swirl nozzle

431

Pressure line

44

lever

5

Sliver laying device

51

funnel

52

Calender rolls

53

Encoder (strip thickness)

54

Hose wheel

541

Hose pipe

55

Jug

56

Turntable

6

Support frame

61

Bearing for drafting system

62

Bearing for top guide roller

63

Bearing for hose wheel

64

Bearing for calender rolls

65

Bearings for lever 43

7

Round comb roller

71

engine

72

central drive shaft

9

Single headbands

91

Sliver share

92

Fleece tape

93

Sliver

Claims (12)

Combing machine with several combing heads, with a drafting device assigned to all combing heads, with a sliver laying device which has a rotatable hose wheel above a rotatable can for storing sliver,
wherein the individual headbands of the combing heads are fed close to one another as a fiber ribbon share from the table level to the drafting system and are stretched there to form a viles ribbon and
wherein the fleece band is combined to form a fiber band by means of a vile funnel near the nip of the output rollers of the drafting system and is fed to the funnel of the fiber band laying device via guide means,
characterized, that a driven ascending conveyor (2) with a calender roller (24) is arranged near a lower guide roller (22) for conveying the fiber band share (91) immediately after the last combing head (1), that the upper guide roller (23) of the ascending conveyor (2) is near and in the plane of the feed rollers (31) of the drafting device (3) and that the output rollers (33) of the drafting system (3) are arranged near and laterally above the hopper (51) of the sliver laying device (5). Combing machine according to claim 1, characterized in that the drafting system (3), the sliver laying device (5), consisting of funnel (51), pair of calender rollers (52) and hose wheel (54), and the upper guide roller (23) of the ascending conveyor (2) are combined to form a structural unit and are mounted on a common support frame (6). Comber according to claim 1 and 2, characterized in that the fleece funnel (41) associated with the output rollers (33) of the drafting device (3) of a band forming unit (4) is connected in a manner known per se to a guide tube (42) for the fiber band (93) and that a pressure line (431) with a controllable valve opens into the guide tube (42) via a swirl nozzle (43). Comber according to claim 1 to 3, characterized in that that the fleece funnel (41) is attached to the free end of a lever (44) which can be pivoted on the support frame (6) between a working position (4) and an operating position (4 '), that in the working position (4) the fleece funnel (41) in front of the nip of the output rollers (33) of the drafting device (3) and the exit opening of the guide tube (42) on the funnel (51) of the sliver laying device (5) and that in the operating position (4 ') the fleece funnel (41) is pivoted up and out by an operating space from the output rollers (33). Comber according to claim 1, characterized in that between the upper guide roller (23) of the ascending conveyor (2) and the input rollers (31) of the drafting device (3) guide elements (30) are arranged, which limit the width of the fiber band share (91). Comber according to claim 1 and 2, characterized in that a central drive (71, 72) is assigned to the assemblies arranged on the common support frame (6) and that the gear stages are designed as toothed or flat belt drives. Combing machine according to claim 1, 2 and 6, characterized in that the drive of the turntable (56) for the movement of the can (55) is derived from the central drive (71, 72) in the region of the support frame (6). Combing machine according to claim 1, 2 and 6, characterized in that a calender (53) for the thickness of the sliver (93) is assigned to the calender rolls (52) of the sliver laying device (5) and that the output rollers (33) of the drafting system (3) and synchronized with these
elements to be driven are assigned a separate drive motor (71) with control unit. Comber according to claim 1, characterized in that the drafting rollers (313, 323, 332) are loaded by means of membrane pistons (341). Comber according to claim 1, characterized in that the drafting device (3) is inclined downwards towards the exit side and in the direction of the funnel (51) of the sliver laying device (5). Comber according to claim 1, characterized in that the top rollers (313, 323) of the drafting device (3) are guided with a play of between 0.5 and 3 mm in the direction of travel of the fiber sliver share (91). Comber according to claim 1, characterized in that at least one delimited suction channel (351, 352, 353) is provided above each top roller (313, 323, 332) of the drafting system (3), that all suction channels (351, 352, 353) of the top rollers (313, 323, 332) open into a common suction chamber (36) and that over each suction channel (351, 352, 353) to the suction line (362) directed air baffles (361) are arranged.

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