Cutting device; separator; method for separating food components using a separator

Abstract

A cutting device, a separator and a method for separating food components using a separator are proposed, wherein the effects of increasing wear of a cutting tool (8) arranged on a rotating body (2) on the comminution of a food are compensated by the fact that the cutting tool (8) is movably arranged on the rotating body (2).

Description

State of the art

[0001] The invention relates to a cutting device according to the preamble of claim 1, a separator according to the preamble of claim 16, and a method for separating food components by means of a separator according to the preamble of claim 22.

[0002] It is state of the art that meat grinders are used to grind foodstuffs such as meat, fish, vegetables, tofu, and cheese. For example, patent DE 10 2011 008 389 B4 discloses a grinder for grinding foodstuffs with a discharge device for removing unwanted solid components from the foodstuffs. This grinder comprises at least one cutting blade, a perforated disc, and a support device for the perforated disc. The discharge device is at least partially integrated with the support device, formed integrally with it, and arranged within a web of the support device. A disadvantage of this design is that the cutting elements are highly susceptible to wear, resulting in a rather limited service life.

[0003] Furthermore, patent DE 21 54 353 C2 discloses a cutting machine for meat products or the like, comprising a cutting set consisting of at least one rotating knife with at least one shearing edge. Near the inner end of this cutting edge, a channel for diverting the cut material is provided, leading through a central hole in the perforated disc downstream of the knife, which acts as a counter-knife. The diverting channel leads into a collection cap that defines a collection space. In the direction of rotation of the knife, the outer parts of the shearing edge lead the inner parts of the shearing edge. A discharge tube extends from the collection space of the cap, into which an adjustable device, e.g., a valve, is installed to change the cross-sectional area of ​​the discharge tube. This design also results in high wear of the cutting set, so limited service life is to be expected.

[0004] Furthermore, patent DE 10 2017 003 407 B3 discloses a device for grinding foodstuffs, which has a cutting element and a pressure housing with a cylindrical drum wall, wherein the pressure housing is formed at a first end section with an inlet opening for the foodstuff and a conveying screw is rotatably mounted in the pressure housing, which has several screw chambers separated from each other by at least one screw flight, wherein the conveying screw has a screw shaft with a constant diameter on the side of the cutting element, to which a tapered section of the screw shaft follows in the direction of the first end section down to the smaller diameter, wherein the cutting element is formed from a drum wall section in which several cutting openings are arranged and a section of the at least one screw flight that covers the cutting openings.An advantage of the previously known device for grinding foodstuffs is that, while simultaneously increasing its service life, it achieves improved feeding of the foodstuff to the cutting element. However, a disadvantage is that replacing a worn screw conveyor, which leads to increasingly unsatisfactory results in food grinding with increasing wear due to the widening gap between the drum and the screw, incurs high costs, and the refurbishment of a worn screw conveyor is time-consuming. This disadvantage also applies to the pipe grinder known from German patent application DE 195 16 716 A1.

[0005] Furthermore, US patent 3,340,97 A discloses a machine for high-speed mincing of meat or similar products, consisting of a housing in which a cylindrical, perforated cutting plate is mounted, separating a product intake chamber and a product discharge chamber, a hollow, rotating shaft mounted concentrically in the cylindrical cutting plate, knife holders mounted on the shaft in which pistons are slidably arranged, the pistons holding blades which, for example, are pressed against the inner surface of the cutting plate by means of compressed air. A disadvantage of this is the high design complexity, which also results in the machine requiring a very high level of cleaning effort.

[0006] The object of the invention is therefore to provide a cutting device, a separator and a method for separating food components using a separator, which overcomes the disadvantages of the prior art. The invention and its advantages

[0007] The cutting device according to the invention, comprising the features of claim 1, the separator according to the invention, comprising the features of Claim 16, and the inventive method for separating food components using a separator, comprising the features of Claim 22,In contrast, these devices have the advantage that the effects of increasing wear on a cutting tool mounted on a rotating body on the comminution of food are compensated for by the fact that the cutting tool (cutting element) is movably mounted on the rotating body. This movability of the cutting tool allows the necessary gap between a drum and the cutting tool for high-quality comminution of the food to be maintained for a longer period, thus extending the service life of the cutting tool despite increasing wear. Furthermore, replacing a cutting tool incurs only minimal costs. Additionally, a conventional separator can also be retrofitted with a cutting device according to the invention.

[0008] According to an advantageous embodiment of the cutting device according to the invention, at least one cutting tool is arranged on the rotating body so as to be movable at least partially radially and / or at least partially in the circumferential direction.

[0009] According to a further advantageous embodiment of the cutting device according to the invention, the rotating body has a first end and a second end, wherein the diameter of the rotating body at the first end is equal to or smaller than the diameter of the rotating body at the second end. The following embodiments of the rotating body are also conceivable, in particular, which can effect a change in the volume flow: cylindrical body of revolution, cylindrical body of revolution at the first end in diameter smaller body of revolution than a worm and cylindrical body of revolution as a worm and at the first end in diameter smaller body of revolution than a worm and cylindrical, the worm core in diameter at the first end in diameter cylindrical body of revolution as a worm and cylindrical, the worm core in diameter at the first end in diameter smaller body of revolution than a worm and cylindrical, the worm windings in pitch constant / narrower / wider body of revolution at the first end in diameter smaller, the worm core in diameter at the first end in diameter cylindrical body of revolution at the first end in diameter smaller, the worm core in diameter at the first end in diameter smaller body of revolution at the first end in diameter smaller, the worm windings in pitch constant / narrower / wider.

[0010] According to a further advantageous embodiment of the cutting device according to the invention, at least one cutting tool, movably arranged on the rotating body, is arranged in a groove on the rotating body. According to a further advantageous embodiment of the cutting device according to the invention, the groove has at least a constant depth and / or at least a sloping plane over its length.

[0011] According to an additional advantageous embodiment of the cutting device according to the invention, at least one cutting tool arranged in a groove on the rotating body is arranged to be movable back and forth in the groove and / or to be movable up and down in the groove.

[0012] According to an additional advantageous embodiment of the cutting device according to the invention, at least one cutting tool is arranged movably on the rotating body and is fixed to rotation on the rotating body.

[0013] According to an additional advantageous embodiment of the cutting device according to the invention, at least one cutting tool is detachably arranged on the rotating body.

[0014] According to an additional advantageous embodiment of the cutting device according to the invention, the rotating body has at least one channel.

[0015] According to a particularly advantageous embodiment of the cutting device according to the invention, the channel opens into a groove in which a cutting tool is movably arranged.

[0016] According to an additional advantageous embodiment of the cutting device according to the invention, the rotating body has an adjusting screw that interacts with at least one movably arranged cutting tool.

[0017] According to an additional advantageous embodiment of the cutting device according to the invention, at least one cutting tool has a longitudinal axis that is aligned parallel to the longitudinal axis of the rotating body, and / or at least one cutting tool has a longitudinal axis that is aligned at an angle to the longitudinal axis of the rotating body.

[0018] According to a further advantageous embodiment of the cutting device according to the invention, at least one cutting tool has a surface that is at least partially profiled. The at least partially profiled surface of the cutting tool facilitates movement of the cutting tool initiated by a foodstuff. Preferably, the profiling consists of depressions and / or protrusions.

[0019] According to an additional advantageous embodiment of the cutting device according to the invention, at least one cutting tool is a cutting beam.

[0020] According to a corresponding advantageous embodiment of the cutting device according to the invention, the rotating body has at least one worm gear in at least some places.

[0021] According to an additional advantageous embodiment of the cutting device according to the invention, at least one screw helix has a varying pitch and / or at least two screw helixes have different pitches.

[0022] According to an advantageous embodiment of the separator according to the invention, which comprises a drum having an inlet opening for feeding the drum with a material to be separated, an outlet opening for material that is not or poorly cuttable, and at least partial cutting openings through which cuttable components of the material and / or foreign bodies can escape from the drum, and a cutting device arranged inside the drum, which has a rotating body having a longitudinal axis about which it can be rotated in at least one direction of rotation, wherein at least one cutting tool is arranged on the rotating body, and wherein at least one cutting tool is movably arranged on the rotating body, the outlet opening of the drum can be closed by a closure having a closing position.

[0023] According to a corresponding advantageous embodiment of the separator according to the invention, the closure is pressure-loaded and / or a closure flap, whereby a pressure build-up of a material to be separated within the drum and in particular in the area of ​​the cutting tool can be controlled.

[0024] According to a further advantageous embodiment of the separator according to the invention, the closure has at least one spring element. Preferably, the spring element is a pressure cylinder which is held in a position closing the outlet opening by means of a connecting rod until the pressure transmitted by the rotating body onto the non- or poorly cutable material and / or foreign substances increases to such an extent that the closure or the closure flap is forced open by the non- or poorly cutable material and / or the foreign substances against a closing force applied by the pressure cylinder and the non- or poorly cutable material and / or the foreign substances fall out of the outlet opening.After the ejection of non-cuttable or poorly cuttable material and / or foreign substances through the outlet opening, the internal pressure inside the drum is initially reduced, and the closing force applied by the pressure cylinder is temporarily greater than the pressure of the non-cuttable or poorly cuttable material and / or foreign substances prevailing in the drum interior, causing the closure and / or the closure flap to move back into a position closing the outlet opening.

[0025] According to an additional advantageous embodiment of the separator according to the invention, the gap dimension between the cutting tool and the drum can be varied by moving the cutting tool.

[0026] According to an additional advantageous embodiment of the separator according to the invention, the cutting device is a cutting device according to one of claims 1 to 15.

[0027] According to an additional advantageous embodiment of the cutting device according to the invention, at least one screw helix has a varying pitch and / or at least two screw helixes have different pitches.

[0028] According to an advantageous embodiment of the inventive method for separating food components by means of a separator, wherein the separator has a drum having an inlet opening for feeding the drum with the food to be separated, an outlet opening for components of the food that are not or poorly separable and / or foreign bodies (e.g.The drum comprises plastic parts, cable ties, metal parts) which are preferably not cut during separation, and has at least partial cutting openings through which cuttable components of the food can escape from the drum, and a cutting device arranged inside the drum, which has a rotating body having a longitudinal axis about which it can be rotated in at least one direction of rotation, wherein at least one cutting tool is arranged on the rotating body, wherein at least one cutting tool is movably arranged on the rotating body, wherein the movable arrangement causes at least temporary movement of the cutting tool by the food located in the drum and / or by an operator located outside the drum, and at least one cutting tool is moved before and / or during separation.

[0029] According to an additional advantageous embodiment of the method according to the invention, the movement of the cutting tool is directed towards the drum.

[0030] According to an additional advantageous embodiment of the method according to the invention, the gap dimension between the cutting tool and the drum is varied by moving the cutting tool.

[0031] According to an additional advantageous embodiment of the method according to the invention, pressure builds up in front of a cutting tool, which is movably arranged on the rotating body, due to the direction of rotation of the rotating body, whereby at least parts of the food are guided under the cutting tool, so that the cutting tool is moved in the direction of the drum.

[0032] According to an additional advantageous embodiment of the inventive method, the food exerts pressure on a cutting tool which is movably arranged on the rotating body, thereby moving the cutting tool towards the drum.

[0033] According to an additional advantageous embodiment of the method according to the invention, the cutting tool (3) is pressed against the drum by the movement of the cutting tool (3).

[0034] According to an additional advantageous embodiment of the method according to the invention, a cutting device according to one of claims 1 to 15, and / or a separator according to one of claims 17 to 21, is used as a cutting device.

[0035] Further advantages and advantageous embodiments of the invention can be seen in the following description, the drawing and the claims. drawing

[0036] Preferred embodiments of the invention are shown in the drawing and are explained in more detail below. They show Fig. 1 a perspective view of a body of revolution surrounded by a drum, Fig. 2 a side view of a body of revolution, according to Fig. 1 , Fig. 3 a front view of a rotating body surrounded by a drum, according to Fig. 1 , Fig. 4 a side view of a rotating body surrounded by a drum, according to Fig. 1 , Fig. 5 a side view of a cutting tool, according to Fig. 1 , Fig. 6 a perspective view of a body of revolution surrounded by a drum, Fig. 7 an end-face view of a body of revolution surrounded by a drum, according to Fig. 6 , Fig. 8 a sectional view of the body of revolution surrounded by a drum along line AA from Fig. 7, Fig. 9 a perspective view of a body of revolution surrounded by a drum, Fig. 10 an end view of a body of revolution surrounded by a drum, according to Fig. 9 , and Fig. 11 a sectional view of the body of revolution surrounded by a drum along line AA from Fig. 10 . Description of the exemplary embodiment

[0037] Fig. 1Figure 1 shows a perspective view of a rotating body 2 surrounded by a drum 1 (perforated drum). The drum 1 has an inlet side 3, on which an inlet opening (not shown) for feeding the drum 1 with material to be separated is located, and an outlet side 4, on which an outlet opening (not shown) for discharging material that is not or poorly cuttable material from the drum 1 is located. The drum 1 has a drum wall 5, which is perforated by cutting openings 6 through which cuttable material can be removed from the drum 1. The cutting openings 6 can, for example, be designed as cylindrical bores. A stepped or conical bore is also conceivable, which results in less friction, with the bore having a smaller diameter towards the inside of the drum than towards the outside.The rotating body 2 is rotatable clockwise about a longitudinal axis (not shown) when viewed from a first end 7. Due to the direction of rotation, pressure builds up on the material to be separated in front of a cutting tool 8, which can be designed, for example, as a cutting bar. This pressure guides the material to be separated via channels 9 to and / or under the cutting tool 8, which is movably arranged in a groove 10. Since the pressure is lower above the cutting tool 8, due to the cutting openings 6 in the drum wall 5, the cutting tool 8 moves outwards towards the inner side 11 of the drum wall 5.Since the movable arrangement of the cutting tool 8 in the groove 10 allows at least temporary movement of the cutting tool 8 by the food contained in the drum, thereby pressing the cutting tool 8 against the inner surface 11 of the drum wall 5, high-quality grinding of the food can be ensured. Thus, the unavoidable wear of a cutting tool 8 mounted on the rotating body 2, which would otherwise lead to an increase in the gap between the inner surface 11 of the drum wall 5 and the cutting tool 8, is compensated for by the cutting tool 8 being movably mounted on the rotating body 2. Preferably, the cutting tool 8 is detachably mounted on the rotating body 2, so that it can be easily replaced if the wear becomes so extensive that it needs to be replaced. Therefore, it is not necessary to replace the entire rotating body 2.The body of revolution 2 has a diameter which is preferably equal to or smaller at its first end 7 than a diameter present at a second end 12 of the body of revolution 2, whereby the pressure on the material to be separated increases towards the second end 12.

[0038] Fig. 2 shows a side view of a solid of revolution 2, according to Fig. 1 . A pressure inlet opening 13 allows the material to be separated to pass below the cutting tool 8, thereby moving the cutting tool 8 towards the drum wall.

[0039] Fig. 3 shows a frontal view of a body of revolution 2, according to Fig. 1 , which is rotatable about a rotation direction 14. Due to the material to be separated, which penetrates the channel as a result of the rotation, the cutting tool 8 with its cutting edge 15 is pressed against the inside 11 of the drum 1.

[0040] Fig. 4shows a side view of a body of revolution 2 surrounded by a drum 1, according to Fig. 1 . To feed the drum 1 with a material to be separated, a screw conveyor (not shown) can be arranged detachably or permanently attached to the first end 7 of the rotating body 2.

[0041] Fig. 5 shows a side view of a cutting tool 8, according to Fig. 1 The cutting tool 8 can be designed as a moon blade (insertable blade).

[0042] Fig. 6 shows a perspective view of a solid of revolution 2 surrounded by a drum 1. In contrast to the one in the Figs. 1 to 5In the illustrated embodiment, which shows a dynamic cutting tool (cutting bar) movable by means of a pressure differential, this embodiment features a dynamic cutting tool 8 (cutting bar) movable by means of an inclined plane. The cutting tool 8, arranged on the rotating body 2, is pushed to the right by the product flow of the material to be separated, which impinges in particular on an end face 17 of the cutting tool 8. The cutting tool 8 is pressed against the inner surface 11 of the drum 1 by an inclined plane. The contact pressure can be influenced by the angle of the inclined plane. Preferably, bolts are inserted into openings 16 to support the inclined plane.

[0043] Fig. 7 shows a front view of a body of revolution 2 surrounded by a drum 1, according to Fig. 6The solid of revolution 2 is rotatable about a longitudinal axis 18. The groove 10 is designed as an inclined plane 19.

[0044] Fig. 8 shows a sectional view of the body of revolution 2 surrounded by a drum 1 along line AA. Fig. 7 The cutting tool 8, arranged on the rotating body 2, is pushed to the right by the product flow 20 of the material to be separated, which impinges in particular on an end face 17 of the cutting tool 8. The inclined plane 19, which is supported by a bolt 21, presses the cutting tool 8 in the direction of arrow 22 against the inside 11 of the drum 1.

[0045] Fig. 9Figure 1 shows a perspective view of a rotating body 2 surrounded by a drum 1. In this embodiment, the rotating body is an adjustable cutting tool 8 (cutting bar). The cutting tools 8 can be moved on an inclined plane by means of an adjusting element 24 secured by a locking or fastening screw 23, which is preferably designed as a nut between the cutting tools 8 and the locking or fastening screw 23.

[0046] Fig. 10 shows a front view of a body of revolution 2 surrounded by a drum 1, according to Fig. 9 .

[0047] Fig. 11 shows a sectional view of the body of revolution 2 surrounded by a drum 1 along line AA. Fig. 10A positive-locking connection, which can be achieved, for example, by a lug 25 and a groove 26 arranged on the adjusting element 24, holds a cutting tool 8 statically in the position desired by an operator (not shown). This allows the gap 27 between the cutting tool 8 and the drum 1 to be adjusted by an operator (not shown). In contrast to the previously shown embodiments, the gap 27 is therefore not set by the product flow of the material to be separated, but by the operator (not shown). As in the other embodiments, unavoidable wear of a cutting tool 8 arranged on the rotating body 2, which would lead to an increase in the gap 27 between the inner surface 11 of the drum wall 5 and the cutting tool 8, is compensated for by the cutting tool 8 being movably arranged on the rotating body 2.In this embodiment, the adjusting element 24 is arranged between the cutting tools 8 and the locking or fastening screw 23. By rotating the adjusting element 24 in one direction or the other, and the associated movement of the adjusting element 24 in a direction of movement 28, the cutting tools 8 can be moved back and forth together in a direction of movement 29.

[0048] All features shown in the description, the following claims and the drawing can be essential to the invention, either individually or in any combination. Reference number list

[0049] 1 Drum 2 Rotating body 3 Inlet side 4 Outlet side 5 Drum wall 6 Cutting opening 7 First end 8 Cutting tool 9 Channel 10 Groove 11 Inside 12 Second end 13 Pressure inlet opening 14 Direction of rotation 15 Cutting edge 16 Opening 17 End face 18 Longitudinal axis 19 Inclined plane 20 Product flow 21 Bolt 22 Arrow direction 23 Locking or fastening screw 24 Adjusting element 25 Nose 26 Groove 27 Gap dimension 28 Direction of movement 29 Direction of movement

Claims

1. Cutting device, - with a rotating body (2) rotatable about a longitudinal axis (18) in at least one direction of rotation (14) and - with at least one cutting tool (8) arranged on the rotating body (2), characterized by that at least one cutting tool (8) is movably arranged on the rotating body (2), wherein at least one cutting tool (8) movably arranged on the rotating body (2) is arranged in a groove (10) arranged on the rotating body (2).

2. Cutting device according to claim 1, characterized by that at least one cutting tool (8) is arranged on the rotating body (2) so that it is at least partially radially and / or at least partially circumferentially movable.

3. Cutting device according to claim 1 or claim 2, characterized by thatthe body of revolution (2) has a first end (7) and a second end (12), wherein a diameter of the body of revolution (2) present at the first end (7) is equal to or smaller than a diameter of the body of revolution (2) present at the second end (12).

4. Cutting device according to one of the preceding claims, characterized by that the groove (10) has at least a constant depth and / or at least a sloping plane (19) over its length.

5. Cutting device according to one of the preceding claims, characterized by that at least one cutting tool (8) arranged in a groove (10) on the rotating body (2) is arranged to be movable back and forth in the groove (10) and / or is movable up and down in the groove (10).

6. Cutting device according to one of the preceding claims, characterized by thatat least one cutting tool (8) is arranged movably on the rotating body (2) and is arranged in a rotationally fixed manner on the rotating body (2).

7. Cutting device according to one of the preceding claims, characterized by that at least one cutting tool (8) is detachably arranged on the rotating body (2).

8. Cutting device according to one of the preceding claims, characterized by that the body of revolution (2) has at least one channel (9).

9. Cutting device according to claim 8, characterized by that the channel (9) opens into a groove (10) in which a cutting tool (8) is movably arranged.

10. Cutting device according to one of the preceding claims, characterized by that the rotating body (2) has an adjusting element (24) that interacts with at least one movably arranged cutting tool (8).

11. Cutting device, according to one of the preceding claims, characterized by that at least one cutting tool (8) has a longitudinal axis that is aligned parallel to the longitudinal axis (18) of the body of revolution (2) and / or at least one cutting tool (8) has a longitudinal axis that is aligned at an angle to the longitudinal axis (18) of the body of revolution (2).

12. Cutting device, according to one of the preceding claims, characterized by that at least one cutting tool (8) has a surface that is at least partially profiled.

13. Cutting device, according to one of the preceding claims, characterized by that at least one cutting tool (8) is a cutting bar.

14. Cutting device, according to one of the preceding claims, characterized by that the body of revolution (2) has at least one helical spiral in at least some places.

15. Cutting device according to claim 14, characterized by thatat least one spiral helix has a varying slope and / or at least two spiral helixes have different slopes.

16. Separator (4), - comprising a drum (1) having an inlet opening for feeding the drum with material to be separated, an outlet opening for material that is not or poorly cuttable and / or foreign bodies, and at least partial cutting openings (6) through which cuttable components of the material can pass out of the drum (1), and - comprising a cutting device arranged inside the drum (1) comprising a rotating body (2) having a longitudinal axis (18) about which it can be rotated in at least one direction of rotation (14), wherein at least one cutting tool (8) is arranged on the rotating body (2), characterized by thatat least one cutting tool (8) is movably arranged on the rotating body (2), wherein at least one cutting tool (8) movably arranged on the rotating body (2) is arranged in a groove (10) arranged on the rotating body (2).

17. Separator (4) according to claim 16, characterized by that the outlet opening of the drum (1) can be closed by a closure having a closing position.

18. Separator (4) according to claim 17, characterized by that The closure is pressure-loaded and / or is a closure flap.

19. Separator (4), according to claim 17 or claim 18, characterized by that the closure has at least one spring element.

20. Separator (4), according to any one of claims 16 to 19, characterized by that a gap dimension (27) existing between the cutting tool (8) and the drum (1) can be varied by the movement of the cutting tool (3).

21. Separator (4), according to any one of claims 16 to 20, characterized by that the cutting device is a cutting device according to any one of claims 1 to 15.

22. Method for separating food components using a separator (4), wherein the separator (4) comprises a drum (1) having an inlet opening for feeding the drum (1) with the food to be separated, an outlet opening for components of the food that are not or poorly cuttable and / or foreign bodies, and at least partial cutting openings (6) through which components of the food that are cuttable can pass out of the drum (1), and a cutting device arranged inside the drum (1) comprising a rotating body (2) having a longitudinal axis (18) about which it can be rotated in at least one direction of rotation (14), wherein at least one cutting tool (8) is arranged on the rotating body (2), characterized by thatat least one cutting tool (8) is movably arranged on the rotating body (2), wherein at least one cutting tool (8) movably arranged on the rotating body (2) is arranged in a groove (10) arranged on the rotating body (2), and wherein the movable arrangement causes at least temporary movement of the cutting tool (8) by the food located in the drum (1) and / or by an operator located outside the drum (1).

23. Method according to claim 22, characterized by that at least one cutting tool (8) is moved before and / or during the separation process.

24. Method according to claim 22 or claim 23, characterized by that the movement of the cutting tool (3) is directed towards the drum (1).

25. Method according to any one of claims 22 to 24, characterized by thatThe movement of the cutting tool (3) varies the gap dimension (27) between the cutting tool (8) and the drum (1).

26. Method according to any one of claims 22 to 25, characterized by that a pressure builds up in front of a cutting tool (8) which is movably arranged on the rotating body (2) due to the direction of rotation (14) of the rotating body (2), whereby at least parts of the food are directed under the cutting tool (8), so that the cutting tool (8) is moved in the direction of the drum (1).

27. Method according to any one of claims 22 to 26, characterized by that The food exerts pressure on a cutting tool (8) which is movably arranged on the rotating body (2), thereby moving the cutting tool (8) towards the drum (1).

28. Method according to any one of claims 22 to 27, characterized by thatThe movement of the cutting tool (8) presses the cutting tool (8) against the drum (1).

29. Method according to any one of claims 22 to 28, characterized by that a cutting device according to one of claims 1 to 15, and / or a separator (4) according to one of claims 16 to 21, is used as a cutting device.