EP2310561B1 - Working element on a fibre-processing machine - Google Patents

Description

The invention relates to a working element on a fiber-processing machine having at least one roller, wherein the working element of the roller is arranged at a distance from one another. The working element extends over the entire working width of the roller, wherein a part of the working element is formed as a suction channel. The working element has at least one Ausscheidemesser and another carding or covering. Between the carding or covering and the Ausscheidemesser is an opening with an ejection distance. The opening connects a space between the working element and the roller with the suction channel. The invention also relates to an associated method for adjusting the ejection distance and a closure element for use in apparatus and method.

Spinning preparation plants use machines, such as cleaners or carding machines, which contain various working elements for the cleaning, sorting, opening, carding, etc. of the fibers to be processed. The various types of fibers are processed, including cotton fibers or man-made fibers or mixtures thereof. For the separation of short fibers and trash parts working elements with Ausscheidemessern be used. The parts or fibers are usually separated from the Ausscheidemesser of a rotating roller. For this purpose, an opening in the working element is provided against the drum before the Ausscheidemesser, the width of this opening is called the ejection distance. After the separated parts have passed the knife, they are fed to a suction and conveyed away.

Working elements of this type are known in various designs, for example GB 2,271,126 , For example, the font describes CH 639 434 A5 a Schmutzausscheider, which has a radially spaced from the drum of the card knife blade and also radially spaced collecting rail. A gap has been left between the collecting rail and the knife blade. The space bounded by the knife blade and the collection rail is covered and forms a vacuum suction chamber. The clear width between the collecting rail and the knife blade is adjustable by Correspondingly provided adjusting screws. A setting of the ejection distance, the gap between knife blade and safety rail is complex, because on the one hand the accessibility of the screws is given only after opening the vacuum Saugkammerabdeckung and on the other hand, the adjustment must be made via several screws, which is a constant check the setting by quantitative measurement necessary power.

Another cleaning element with a Ausscheidemesser discloses the font DE 39 02 204 A1 , Therein, the ejection distance is determined by the distance between the knife blade and the upstream element. At the back of the upstream element, a guide element is mounted, which can be pivoted into the ejection distance and thereby changes the size of the ejection distance. A disadvantage is that the guide element is arranged to be movable, which can lead to an undesired adjustment during operation. The shape of the element must also be ensured for a longer construction by a correspondingly complex construction. Due to the fact that guide element and knife blade are not arranged on the same cleaning element, the accuracy of the adjustment is impaired by the independent attachment of the individual cleaning element to the machine.

The European patent application EP 0 388 791 A1 also discloses a device for removing dirt with the aid of a knife blade, which allows an adjustment of the ejection distance. The setting of the separation gap between the knife blade and the upstream carding element is carried out by adjusting screws. The screws are freely accessible in the disclosed embodiment, without a part of the device must be dismantled. The complex adjustment due to several distributed over the length of the working element screws remains, however.

Object of the present invention is therefore to provide a working element of the type mentioned, which does not have the mentioned disadvantages of the known prior art and allows easy adjustment of the ejection distance. additionally It is the object of the present invention to achieve a flexible design of the setting of the ejection distance and an improvement of the setting accuracy.

The object is solved by the features in the characterizing part of the independent claims.

To solve the problem, it is proposed to provide a working element which has a receptacle in which a closure element is held stationary by means of a clamping force, wherein the ejection width is given by the shape of the closure element.

For the removal of debris and short fibers at different points in fiber processing machines Ausscheidemesser be used. These elimination knives are embedded in working elements or are in the form of grates directly opposite rollers which transport the fibers and pass the elimination knife. The inventive design of a provided with a Ausscheidemesser working element is used in the fine cleaning, preferably in machines for carding of fiber material. The working element includes various devices such as the actual knife blade, carding or cover elements. Other devices such as measuring devices, sampling devices, guide elements and suction channels can also be accommodated in the working element. Preferably, the working element itself is shaped as a suction channel. However, it is quite common to use for the extraction of the excreted on the knife blade parts a separate or patch suction, even in such a case, the suction is attributable to the working element as a part of the same.

The working element is composed of a carrier and the devices held on the carrier. The carrier is placed opposite a roller, for example a licker-in roller or a drum of a card. In this case, the carrier and thus also the working element extends over the entire width of the corresponding roller or drum. The carrier is supported at the outer ends of the roller on the side shields of the machine, in which normally also the roller respectively Drum is stored. The support of the carrier takes place in various ways, usually the support is designed such that a certain distance between the roller or a set on the roller and the working element can be adjusted.

In a preferred embodiment, the carrier is composed of several parts. In this case, the two parts, which are for example made as hollow profiles, held together with a clamp. The clamp is mounted on the side of the working element facing away from the roller. The two carrier parts are shaped so that they form a suction channel in the assembled state. The roller opposite the carrier is a knife blade attached. The knife blade is attached to the roller at an angle to the tangent so that the tip of the knife blade directed against the roller points counter to the direction of rotation of the roller and functions as a selector blade. The attachment of the knife blade on the carrier can be made interchangeable as well as adjustable. As seen in the direction of rotation of the roller, a carding element is mounted in front of the knife blade. Ideally, this carding element is also attached to the support of the same working element as the knife blade. This upstream Kardierelement can be provided with a set or be designed as a cover. The attachment of the carding on the support of the working element can be made adjustable in a known manner.

In a further embodiment, the cover is integrally formed on the support of the working element. The carrier profile is designed such that the roller-facing surface of the carrier forms the cover. If the use of a carding element is not provided, the result of this embodiment of the support of the working element is the advantage of a favorable production, since it is possible to dispense with the formation of fastening possibilities for a separate carding element or covering element.

There is an opening between the upstream carding or covering and the Ausscheidemesser, which connects the space between the roller and the carding respectively cover with the suction channel. The width of the opening respectively the distance between the carding or covering element and the knife blade of the separating knife is referred to as ejection distance. Through this gap, the debris and short fibers are transported over the knife blade from the roll surface in the suction channel. About the suction the excretions are removed from the working element and fed to a disposal or recycling.

The size of the ejection distance is determined by the arrangement of the Ausscheidemessers, the installation of the working element and the properties of the fiber material to be processed. As the ejection distance increases, so does the amount of precipitate. The present invention enables easy adjustment of the ejection distance. Such an adjustment of the ejection distance may be necessary in a batch change, a conversion of the material to be processed or a conditionally determined by fabrication specifications higher excretion. Due to the possibility of adjusting the ejection distance, a structurally identical working element can be used for different installation locations and only the setting of the ejection width can be changed.

The adjustment of the throw distance is done by simply replacing a closure element. In the carrier of the working element, a receptacle is provided opposite the separating knife into which a closure element can be used. Preferably, this insertion of the closure element takes place by insertion in the direction of the axis of rotation of the roller. This has the advantage that the working element does not have to be accessible in its interior in order to be able to introduce the closure element. Also, the setting of the working element or Ausscheidemessers is not changed by the insertion of a closure element. The ejection distance is thereby variable independently of the setting of the knife blade with respect to the roll surface. The receptacle provided in the carrier of the working element is shaped in such a way matched to the closure element, that the closure element is held by a clamping force. The necessary clamping force for attachment can be generated by deformation of the closure element. In this case, distributed over the length of the working element different attachment points may be provided, in which the closure element and the receptacle are specially shaped to generate the clamping force. The recording of the working element and parts of the closure element can be formed such that they function as a snap connection, in which deforms a component and hooked with the recording in the other component.

In a preferred embodiment, a clamping force generating clamping means is inserted between the working element, respectively carrier of the working element, and the closure element in the receptacle. The clamping means may be designed as a spring element, for example made of elastically deformable material or in an elastically deformable construction. However, the clamping means can also be designed as a wedge element or under certain environmental conditions expanding element. When using a spring element, such a spring element can vary in its dimension, so that it does not extend over the entire length of the working element. The use of several distributed over the length of the working element spring elements leads to a preferred embodiment. The individual spring elements are immovably embedded in the receptacle on the support of the working element, so that they are not crazy even when introducing the closure element.

The receptacle in the support of the working element and the counterpart formed on the closure part are formed in their dimensions in such a way that the closure element can be captively inserted into the support. As a result of the shaping of the closure element and the receptacle, the closure element can not fall out transversely to the axis of the roller.

The introduction of the closure element can be done by a latching in a snap connection or insertion in the presence of a clamping means or a combination thereof. Under a latching is a clip-like attachment to understand. The closure element is laterally inserted into the working element and then introduced with a movement transversely to the axis of rotation of the roller into the receptacle, where the formations snap on the closure element at the intended locations. By deformation of the receptacle or the closure element in the formation of this snap connection, a clamping force is generated, which holds the closure member in a predetermined position and thus causes a predefined adjustment of the ejection distance due to the geometric dimensions of the closure element. Such a snap connection can be done by a deformation of the components involved in the snap connection or triggered by inserted spring elements.

In a preferred embodiment, the receptacle in the support of the working element is designed as extending over the entire length of the working element respectively carrier groove. The necessary in such an embodiment, clamping force generating spring elements may extend over the entire or only over part of the length of the working element. However, it is also conceivable that the spring elements are integrally formed on the closure element or are inseparably connected thereto and are introduced together with the closure element in the recess designed as a groove. An inseparable connection results, for example, through cohesive connections or gluing.

The recording in the working element can be closed on one side of the carrier and on the other side, where the insertion of the closure element is carried out, be made lockable to prevent lateral displacement of the closure element. The receptacle and the closure element are formed such that the closure element is held captive in the receptacle transversely to the insertion direction, even in the case of failure of the clamping means.

The ejection distance is limited after insertion of the closure element by the Ausscheidemesser opposite surface of the closure element. By selecting the closure element to be used, the ejection distance can be adjusted. Corresponds to the width of the selected closure element, at the location of the Ausscheidemessers, the ejection distance, is closed by inserting the closure element, the ejection distance equal to zero and thus the opening which connects the space between the roller and the carding respectively cover with the suction. As a result, an elimination can be prevented without the work item having to be replaced. This brings the extra Advantage that without adjustments in a renewed replacement of the closure element, the previous setting of the working element or Ausscheidemessers is restored. Closing of the working elements with Ausscheidemesser is advantageous in the processing of synthetic fibers.

The surface of the closure element opposite the separating knife can be designed as a surface with a contour or a structured surface. The shape of the surface and its surface structure can be designed such that the flow in the space between the closure element and the Ausscheidemesser is affected. Thereby, the geometric shape of the opening between the Ausscheidemesser and the closure element is given with the design of the closure element.

By inserting the closure element, this is the carding element or cover connected downstream in the direction of rotation of the roller. In this case, the surface of the closure element facing the roller forms a continuation of the surface of the carding element or covering element. Advantageously, the roller facing surface of the closure element is offset in comparison to the preceding element. As a result, the gap between the roller surface and the carding element widens to the gap between the roller surface and the closure element. By replacing the closure element and a corresponding shaping of the closure element, the ejection distance and the distance between the roll surface and the surface of the closure element facing the roll surface can be adjusted.

Fig. 1

Schematische Darstellung einer Seitenansicht einer herkömmlichen Karde nach dem Stand der Technik

Fig. 2

Vergrösserte Darstellung der Nachkardierzone nach der Figur 1

Fig. 3

Schematische Darstellung eines Querschnitts eines Arbeitselementes in einer ersten erfindungsgemässen Ausführungsform

Fig. 4a

Schematische Darstellung eines Ausschnittes A aus der Figur 3 im Bereich der Messerklinge mit eingestellter Auswurfweite

Fig. 4b

Schematische Darstellung eines Ausschnittes A aus der Figur 3 im Bereich der Messerklinge mit geschlossener Auswurfweite

Fig. 5

Schematische Darstellung eines Querschnitts eines Arbeitselementes in einer zweiten erfindungsgemässen Ausführungsform

Fig. 6

Schematische Darstellung eines Querschnitts eines Arbeitselementes in einer dritten erfindungsgemässen Ausführungsform

In the following the invention will be explained with reference to exemplary embodiments and explained in detail by drawings.

Fig. 1

Schematic representation of a side view of a conventional card according to the prior art

Fig. 2

Enlarged view of the post carding zone after the FIG. 1

Fig. 3

Schematic representation of a cross section of a working element in a first embodiment according to the invention

Fig. 4a

Schematic representation of a section A from the FIG. 3 in the area of the knife blade with the ejection width set

Fig. 4b

Schematic representation of a section A from the FIG. 3 in the area of the knife blade with closed ejection distance

Fig. 5

Schematic representation of a cross section of a working element in a second inventive embodiment

Fig. 6

Schematic representation of a cross section of a working element in a third inventive embodiment

FIG. 1 shows a side view of a known Wanderdeckelkarde in a schematic representation. The fiber flakes to be carded 1, which may consist of natural fibers or chemical fibers or mixtures thereof, are in the form of cleaned and dissolved flakes in a hopper (not shown) recorded. From the hopper, the flakes are respected by a breeze. Lecturer 2 taken over and a tambour resp. Drum 3 fed. The flakes are dissolved on the drum 3, parallelized and cleaned. By the pre-circuit of a multiple licker-2 is already carried out by this partial dissolution and cleaning of the fiber flakes 1. These processes are done by the interaction of drum 3 respectively. Vorreisserwalzen 2 with different stationary working elements 7, 8, 9 and a revolving deck unit 4. The stationary working elements 7, 8, 9 are arranged over the circumference of the drum in three main zones, a Vorkardierzone 7, a Nachkardierzone 8 and a Unterkardierzone 9. The Hauptkardierzone by the Wanderdeckeaggregat 4 formed. The drum 3 is provided on its surface with a garnish and rotates about its axis of rotation 3a in a rotational direction 14 from the licker-in 2 over the Hauptkardierzone to the consumer 5. By processing the Fibers between the clothing of the drum 3 and the stationary or moving working elements arranged opposite the drum assembly form the fibers on the drum 3 a nonwoven fabric which is taken off a doffer roll 5 and fed in a manner known per se into a discharge part 6 consisting of different rolls a card sliver is formed.

The fixedly mounted working elements in the different carding zones 7, 8, 9 are for example carding elements, working elements with Ausscheidemessern 10, 11, 12 and guide or cover.

For the separation of dirt, impurities and short fibers working elements with Ausscheidemessern 10, 11, 12 are used. Working elements with Ausscheidemesser 10, 11, 12 are used in the Vorkardierzone 7, the Nachkardierzone 8, the Unterkardierzone 9 as well as in the licker 2. With the help of the Ausscheidemesser 10, 11, 12 dirt and short fibers are excreted from the surface of the drum 3 as well as the surface of a Vorreiserwalze 13 from the fiber fleece and transported away.

FIG. 2 shows an enlarged view of Nachkardierzone 8 after the FIG. 1 , In the exemplary embodiment shown, three working elements 12 are shown in the Ausscheidemesser design. The working elements 12 with Ausscheidemesser are fixedly attached to the side shields 15. The side shields 15 are supported on both sides of the drum 3 on the machine stand (not shown). The drum 3, which in FIG. 2 is shown with its longitudinal axis 3a is installed between a left and a right side shield 15 and has a direction of rotation during operation 14. The working elements 12 span the drum 3 in its entire width. It can also be dispensed with the execution of side shields and a support of the various stationary elements and the drum can be carried out in a stator construction.

FIG. 3 shows a schematic representation of a cross section of a single working element 12 in a first embodiment according to the invention. The drum 3 is provided on its surface with a set 3b. In operation, the drum 3 rotates about its axis 3a in the direction of rotation 14, the set 3b of the drum 3 is in FIG. 2 passed from top to bottom on the working element 12. The working element 12 comprises a knife blade 20 which can also be referred to as a separating knife 20. As seen in the direction of rotation 14 of the drum 3, the separating knife 20 is preceded by a carding element 21. The carding element 21 and the separating knife 20 are fastened to a carrier 22, 23 of the working element 12. The attachment of Kardierelement 21 and Ausscheidemesser 20 is made adjustable, so that the distance a between the set 3b of the drum 3 and the Kardierelement 21 and the distance between the set 3b of the drum 3 and the Ausscheidemesser 20 can be adjusted.

The working element 12 is composed of several components which are immovably connected to each other. Thus, the working element 12 consists of a first carrier 22, which carries the Ausscheidemesser and a second carrier 23, which carries the Kardierelement 21. The first and the second carrier 22, 23 are connected to each other by a clamp 24 to the working element 12. In another embodiment, a construction of the working element 12 of more than two components and a connection of the components with screws is known. The first and second carrier 22, 23 form in the assembled form to the working element 12 a suction channel 25. Between the Ausscheidemesser 20 and the carding 21 forms in the assembled state, an opening 26 which a space between the working element 12 and Trommel.3 with the suction 25 connects. The width of the opening 26 at its narrowest point is referred to as ejection distance c. In the opening 26, a closure element 27 is introduced, which reduces the ejection distance c. Without closure element 27, the ejection distance c would be equivalent to the distance between the carding element 21 and Ausscheidemesser 20. This largest possible ejection distance c is characteristic of a working element 12 with Ausscheidemesser 20. By the use of closure elements 27 is now a constriction of the ejection distance c possible. In the working element 12, a receptacle 19 is provided in the second carrier 23, which allows the introduction of the closure element 27. The receptacle 19 is provided in the form of a groove, which corresponds to the shape of the closure element 27 is adapted such that the closure element 27 is held captive in the receptacle 19. Also shown is a spring element 28, which is inserted between the closure element 27 and the carrier 23 and fixed by a corresponding deformation, the inserted closure element 27 by means of a clamping force.

In the FIGS. 4a and 4b the use of various closure elements 27 is shown. Both figures show the detail X after the FIG. 1 in an enlarged view. The two figures together is the representation of the first carrier 23 with the Kardierelement 21 attached thereto, the second carrier 22 with the attached Ausscheidemesser 20 and the schematic representation of the drum set 3b with its direction of movement 14. Between the drum set 3b and the Kardierelement 21 is the Distance a and between the Ausscheidemesser 21 and the drum set 3b, the distance b. The two distances a and b are independently adjustable via the attachment of the working element 12 on the machine stand. Independently of this setting of the distances a and b, the distance e between the surface 34 of the closure element 27 and the drum set 3b is given by the closure element 27. By replacing the closure element 27 results in a corresponding selection another distance e and / or another ejection distance c, without an adjustment of the distances a and b takes place.

In FIG. 4a the ejection distance c is indicated as the distance between the separating blade 20 and the closure element 27. Without the closure element 27, the ejection distance c would be greater by the width of the closure element 27. By replacing the closure element 27, the ejection distance c can be increased or decreased. An exchange of the closure element 27 is effected by a displacement of the closure element in the receptacle 19 in the direction of the axis of the roller (see FIG. 3 ). The receptacle 19 is designed such that the closure element 27 can engage with a molded-on bulge in the receptacle. The interlocking parts can not be joined across the axis of the roll due to their shape. Also introduced into the receptacle 19 is a spring element 28, which by a clamping force generating effect the closure element 27 in a certain

Holds position without play. Also, the geometric shape of the opening 26 by the design of the surface 33 of the closure element 27, which faces the Ausscheidemesser 20 and the opening 26, are changed. In addition, the surface 33 may be provided with a structure that affects the flow in the opening 26. With a structuring of the surface 34 of the closure element 27, an influencing of the flow in the gap between the drum set 3b and the closure element 27 or the separating knife 27 is possible. The design of the transition from the surface 34 into the surface 33 of the closure element 27 also influences the flow conditions in the region of the separating knife 20.

In FIG. 4b a closure element 27 is inserted whose width corresponds to the ejection distance c. Thus the ejection distance c is closed. From the FIG. 4b It can also be seen that neither the distance a between the drum set 3b and the carding element 21 nor the distance b between the separating knife 22 and the drum set 3b changes due to the introduction of the closing element 27. By a corresponding design of the surface 34 of the closure element 27, which faces the drum set 3b, the flow behavior in the gap e between the closure element 27 with its surface 34 and the drum set 3b can be influenced.

FIG. 5 shows a schematic representation of a cross section of a working element 12 with a Ausscheidemesser 20 in a second erfndungsgemässliche embodiment. The representation in FIG. 5 is different from the FIG. 3 in that, instead of the carding element, a cover element 29 is inserted into the second carrier 23 of the working element 12. The remaining components are the same as in FIG. 3 , The use of a closure element 27 is independent of the upstream element 21, 29 and changed in this variation of the working element 12, the ejection distance c and the geometric shape of the opening 26th

FIG. 6 shows a further development of the working element 12, also in a schematic representation with a Ausscheidemesser 20. The attachment of the closure element 27 is identical to the illustrations in FIG. 3 or 5 , However, that is the first carrier designed as a combination carrier 30. The composite support 30 is characterized in that the separating element 20 upstream cover member is integrally formed on the composite support 30 and does not have to be used as a separate element.

The drum 3 facing surface 32 of the composite support 30 is formed as a cover. A replacement of the cover is in this case only achievable by replacing the combination carrier 30 with a first carrier 22, which allows attachment of a separate Kardierelements 21 or a separate cover member 29. On the properties and the possibilities which are given by the closure member 27 and its interchangeability, the execution of the molded onto the composite support 30 cover member has no effect.

Legend

1

fiber flocks

2

licker

3

drum

3a

Rotary axis of the drum

3b

cylinder clothing

4

Revolving flats

5

customer

6

Band-building unit

7

pre-carding zone

8th

post-carding

9

Unterkardierzone

10

Working element with separating knife licker-in

11

Working element with separation knife, pre-carding zone

12

Working element with separating knife Nachkardierzone

13

licker

14

Direction of rotation of the drum, direction of movement of the drum set

15

side shield

19

admission

20

separating knife

21

carding

22

First bearer of the work item

23

Second carrier of the working element

24

clip

25

suction

26

opening

27

closure element

28

spring element

29

cover

30

Combination carrier

31

Gap between carding element or cover element and drum set

32

Surface of the combination carrier

33

Surface of the closure element against the Ausscheidemesser

34

Surface of the closure element relative to the clothing of the drum

a

Distance carding element to drum set

b

Distance separating knife to drum set

c

Throwing distance,

e

Distance closing element to drum set

Claims (15)

1. Working element (10, 11, 12) on a fiber processing machine, having at least one roller (3, 13), the working element (10, 11, 12) being situated at a distance (a) opposite from the roller (3, 13) and extending over the entire width of the roller (3, 13), a portion of the working element (10, 11, 12) being formed as an extraction channel (25), and the working element (10, 11, 12) having at least one mote knife (20) and a further carding element (21) or cover element (29), and an opening (26) having an ejection width (c) is located between the mote knife (20) and the carding element (21) or cover element (29), the opening (26) connecting a space between the working element (10, 11, 12) and roller (3, 13) to the extraction channel (25), characterized in that the working element (10, 11, 12) has a receptacle in which a closure element (27) is stationarily held with the aid of a clamping force, and the ejection width (c) is determined by the shape of the closure element (27).
2. Working element (10, 11, 12) according to Claim 1, characterized in that the clamping force may be produced by deformation of the closure element (27).
3. Working element (10, 11, 12) according to Claim 1, characterized in that a clamping means is present between the closure element (27) and the working element (10, 11, 12), by means of which the clamping force may be produced.
4. Working element (10, 11, 12) according to Claim 3, characterized in that the clamping means is designed as at least one spring element (28) which extends over a portion of the length of the closure element (27).
5. Working element (10, 11, 12) according to at least one of the preceding claims, characterized in that the closure element (27) is shaped in such a way that the closure element (27) is held captive in the receptacle (19) of the working element (10, 11, 12).
6. Working element (10, 11, 12) according to at least one of the preceding claims, characterized in that the receptacle (19) of the working element (10, 11, 12) is designed as a groove which extends over the entire length of the carrier (22, 23).
7. Working element (10, 11, 12) according to at least one of the preceding claims, characterized in that the ejection width (c) is delimited by the closure element (27) and the mote knife (20).
8. Working element (10, 11, 12) according to at least one of the preceding claims, characterized in that the ejection width (c) is closed by the closure element (27).
9. Working element (10, 11, 12) according to at least one of the preceding claims, characterized In that the geometric shape of the opening (26) between the mote knife (20) and the carding element (21) or cover element (29) is determined by the closure element (27).
10. Working element (10, 11, 12) according to at least one of the preceding claims, characterized in that the cover element Is a combination carrier (30) having an integrally molded cover element, and the closure element (27) is stationarily held in the combination carrier (30).
11. Method for adjusting an ejection width (c) In a working element (10, 11, 12) of a fiber processing machine, having at least one roller (3, 13) having a rotational axis (3a), the working element (10, 11, 12) being situated at a distance (a) opposite from the roller (3, 13) and extending over the entire width of the roller (3, 13), and a portion of the working element (10, 11, 12) forms an extraction channel (25), and the working element (10, 11, 12) has at least one mote knife (20) and a further carding element (21) or cover element (29), wherein the ejection width (c) is located between the mote knife (20) and the carding element (21) or cover element (29), characterized in that a closure element (27) Is introduced into a receptacle (19) on the working element (10, 11, 12) and Is stationarily held by a clamping force, wherein the ejection width (c) is determined by the shape of the closure element.
12. Method according to Claim 11, characterized In that the closure element (27) is introduced in the direction of the rotational axis (3a) of the roller (3, 13).
13. Method according to Claim 11 or 12, characterized in that the clamping force is produced by a spring element (28) which is integrally molded onto or fastened to the closure element (27), or is held in the receptacle (18) on the working element (10, 11, 12).
14. Combination of a closure element (27) with a device according to Claims 1 through 10, characterized In that the closure element (27) is formed as one piece, and its length corresponds to the length of the working element (10, 11, 12).
15. Combination according to Claim 1A, characterized in that the closure element (27) has a spring element (28) which is integrally molded onto or integrally bonded to the closure element (27).

Images