JP2018192614A - Device for feeding paper section of prescribed length - Google Patents

Abstract

To make it possible to perform cutting-off of a paper section by pulling an end part of a paper web and easily access to subsequent paper web by a hand in a device for feeding a paper section of a prescribed length from a paper web which is wound on a paper roll.SOLUTION: A device has a cutting roller 40 which has a width corresponding to the whole width of a paper web and comprises a blade 42 which projects from a roller shell, and a pressure roller which has a slit-shaped opening corresponding to the blade and is combined to the cutting roller via a gear wheel. In order to enable cutting and automatic feeding of the paper web, the gear wheel is eccentrically combined to a tension spring, and pulling of the end part of the paper web causes feeding of a paper end part after passing a turning point by penetration of the blade into the slit-shaped opening from an outer side, and therefore, rotations of both of the cutting roller and the pressure roller in opposite direction are continued by contraction of the tension spring.SELECTED DRAWING: Figure 10

Description

  The invention relates to a device for feeding a paper section of a predetermined length in accordance with the item preceding the item that is the subject of claim 1.

  A device of this type is known from German Patent Application No. 20 03 354 A. This prior art device individually comprises a paper web comprising a rotatable blade having a perforated cutting edge and a grooved roller that rotates synchronously with the blade and has a slit for receiving the blade. A perforation forming device for dividing the sheet. The cutting edge of the blade is embodied in a sawtooth shape. In addition, the blade comprises a plurality of grooves, with which the corresponding ridge engages when the blade moves in close proximity to the grooved roller and passes through it in a rotating manner. Since the blade passes through the grooved roller in a rotating manner, the outer diameter of the blade engages with the slit, and the cutting edge of the blade, except for the portion of the paper web that is located opposite the groove, Perforations are formed throughout the width. The unperforated portion of the web has sufficient tension to allow the user to pull the paper web from the dispenser using a loose and constant pull force.

  German Patent Application No. 28 14 792 A1 relates to a device for delivering a paper section of a predetermined length, followed by separating the paper section from a paper web wound on a paper roll and feeding the separated paper section. And a device for allowing easy contact to the paper web, whereby the device is operated by pulling on the end of the paper. The device consists of at least one cutting roller, which has a width corresponding at least to the width of the paper web, which is at least partially surrounding an angle α with the cutting roller's bus bar α—different from zero. It is characterized by. The cutting roller includes a fixed blade that extends substantially across the width of the roller and protrudes from the roller shell. Associated with the cutting roller is a pressure roller, which has a slit-shaped opening that matches the placement of the blade. The two rollers are connected to each other by a gear wheel, which has a partial circular diameter corresponding to the diameter of the roller, which is perforated by a blade-stretched tightly over a slit-shaped opening In this way, a synchronous movement of the rollers is produced, so that during the course of this cutting process the blade penetrates the slit-shaped opening.

  The blade comprises a cutting edge embodied like a saw blade. According to this prior art, the cutting line of the blade forms an angle α with the bus bar of the cutting roller, whereby the angle corresponds to a constant angle of inclination of the spiral line. Pulling the end of the paper web results in rotation of the cutting roller by frictional contact. The blade that engages the stretched paper web with the help of the deflection roll initiates the process of detaching the paper section from the subsequent paper web. This detaching process is completed before the edge of the blade engages the paper web and a sufficiently large piece of the following paper web protrudes from the dispenser and can be easily contacted by hand for the subsequent paper feeding process Not.

  AT 509 751 A1 relates to a paper dispenser for sheet feeding of paper, which protrudes from a dispenser housing in a waiting position so that it can be pulled out of the supply roll by hand. The paper web may already have been subject to pre-crossing perforations, but for example in the dispenser by carrying it on a cutting roller where the blade extends and retracts depending on the rotational position. It can also be cut by. This does not cut across the entire width, but preferably the two short areas remain uncut. That is, in a manner that allows or forces one sheet of paper to be torn off. The dispenser is operated purely mechanically, i.e. the user grasps and pulls the protruding end of the paper web. This moves the internal feed roller, which is preferably identical to the cutting roller. The payout roller is on the side with a gear wheel as a stand-by drive, a grooved link to control the stop, and after the paper is torn and is no longer available for further operation, And a spring loaded continuous conveying device for taking over operation until completed.

  European Patent Application No. 1 153 565 A1 relates to a mechanism for cutting and providing a section of tape material in a particular paper towel comprising at least one cylinder, wherein the support structure is around one centerline Is free to rotate and pull at least one end section of the web, so that it is arranged in the cylinder is one or more movable blades for cutting the end section of the paper web Projecting from the cylinder, whereby the blade is connected to an axis that rotates freely about one centerline, for example, oriented parallel to the longitudinal centerline of the cylinder. The shaft comprises at least one first means, which protrudes from one side of the cylinder and rotates freely around the corners of the outer periphery. The rotational movement is caused by at least one second means, which shifts in a direction parallel to the longitudinal centerline of the movable blade and rotates around the centerline, thereby this second The rotational translation of the means is synchronized with the rotational movement of the cylinder. The rotational movement of the cylinder is first started by pulling the paper web over a distance equal to half a rotation, whereby a second half rotation is then triggered by the tension spring, which is connected to the side wall and the cylinder mandrel. Connected between the gear wheel. A blade having a sawtooth shape is used to cut the paper.

  German Patent Application No. 36 90 545 T1 relates to a dispenser for a roll of flexible tape material comprising a feed roll and a cutter blade. The cutter blade consists of a series of teeth, which are arranged at some distance from each other along the length of the blade. In this prior art, there are four pairs of teeth along the length of the blade, so that these pairs of teeth are separated by a notch. Using a cutting edge of this shape will result in a straight cut extending parallel to the centerline of the payout roll, when it is fed through the roll to a flexible band material web This leaves the three small sections of the web uncut, which corresponds to the width of the section and the length of the section still on the outer peripheral surface of the feed roll.

  Over that, by leaving these small uncut sections of the web that the web width encompasses the sections between each other, the dispenser chassis has already been cut essentially before the web reaches the feed outlet It serves to maintain web continuity when it still stays within the range. When the web is further pulled out of the dispenser housing by the future user of the now determined sheet length, the future user applies a low level of pulling force, which is a spaced uncut section Is formed by the spacing between the slits arranged in the outer peripheral surface of the feeding roll and the configuration of the cutting blade.

  Based on this foundation, the object of the present invention is to provide a device of the type described above in such a way that a high strength and elasticity paper web can be cut and fed in a reliable and problem-free manner. Is to further develop.

  In particular, a device for feeding a length of paper section should be capable of cutting and feeding paper webs of different strength and elasticity in a reliable and trouble-free manner.

  The purpose of this is to pull the end of the paper web out of the other features, in that the gear wheel connected to the cutting or pressure roller is connected eccentrically to the tension spring. Through the blade to the slit-shaped opening, the paper web is stretched tightly along the outer peripheral surface of the pressure roller to cause both separation of the paper section and extension to the folding point of the tension spring, A blade to feed the paper section and the new paper end by contraction of the tension spring in terms of providing the remaining components while cutting the cross-section and after the turn-around point has been exceeded This is achieved by the present invention in that both the roll and the pressure roll continue to be moved in opposite directions.

  Maintaining the remaining components while placing the cutting roller that cuts the paper web into sections outside the pressure roller achieves the advantage that the blade engages the slit-shaped opening of the pressure roller from the outside However, it ensures accurate and problem-free cutting, especially for high strength and elastic paper webs, compared to current prior art. It is simple to tear the paper edge because the paper edge is connected to the paper web only through the remaining components.

  Automatic feeding of the paper section is supported by a blade and a pressure roller so that the user has contact to a new paper edge with a tip that extends parallel to the feed opening. In contrast to the prior art, this has the advantage that the paper can be easily grasped firmly.

  According to a preferred embodiment, it is intended that the first end of the tension spring is connected eccentrically to the gear wheel of the cutting roller and the second end of the tension spring is connected to the housing section, whereby the tension spring The effective line extends perpendicular to the line connecting the mandrel of the gear wheel.

  The gear wheel forms a transmission with a transmission ratio of 1: 1. This ensures that the cutting roller rotates in synchronism with the pressure roller, but in the opposite direction of rotation.

  It is further contemplated that the outer peripheral surface of the cutting roller is arranged at a distance from the outer peripheral surface of the pressure roller.

  In a preferred embodiment, it is contemplated that the blades comprise blade blades having teeth and / or groups of teeth, which are spaced along the length of the blade blades, whereby the teeth or groups of teeth are Are separated from each other by an incision, whereby each of the incisions has two cutting edges that extend parallel to each other and transverse to the longitudinal extent of the blade, and in addition to the cutting At least one of the edges is a cutting edge of a tooth that touches the cut or a group of teeth that touch the cut.

  In addition, the slit-shaped opening of the pressure roller has a bridge extending in the outer circumferential direction, so that the width and separation of the bridge correspond to the cutting interval of the blade. During relative movement between the bridges, the bridge engages the notch and intersects the cutting edge in a scissor-like manner.

  The embodiment of the present invention of a blade combined with a bridge and slit-shaped opening extending along the outer circumferential direction allows the paper web to be cut with very little need for force. Continued conveyance of the section and subsequent tearing of the paper section is facilitated in an uncomplicated manner. Placing the cutting roller on the outside of the pressure roller also realizes the advantage that the blade engages the slit-shaped opening of the pressure roller from the outside, especially for high density and elastic paper webs Ensure accurate and error-free cutting.

  This is achieved in particular by the blade edge, which protrudes from the cutting roller and forms an angled section. The angled section comprises teeth or groups of teeth and is angled with respect to the blade along the deflection line at an angle α where 15 ° ≦ α = 50 °, preferably α = 35 °. .

  The cutting roller can comprise two sections having a semicircular cross section, whereby the blade of the blade is fixed, eg, clamped, in a position between the semicircular sections. This ensures less complex assembly and simple repairs when changing blades.

  It is further intended that the cutting roller be provided with grooves along its outer peripheral surface, each of which corresponds to one of the cuts, whereby the width and depth of the groove is the width and depth of the cut. Corresponding to The spacing between the bridges of the pressure roller corresponds to the width of the group of teeth on the blade edge.

  Further details, advantages and features of the invention are found not only in the claims, in the particular features listed therein-individually and / or in combination-but also in the description of the drawings below. Found.

FIG. 1 shows a front view of a device for feeding a length of paper section without a cover hood. FIG. 2 shows in cross-sectional view the device of FIG. 1 along section line AA, having a paper roller, a cutting roller and a pressure roller. FIG. 3 shows a side view of the device of FIG. 1 from the left with a gear wheel transmission mechanism and a return spring. 4a) shows a side view of the gear wheel transmission mechanism with the return spring of FIG. 3 in its neutral position, and FIG. 4b) shows the arrangement of the rollers in its neutral position in a sectional view. FIG. 5a) shows a side view of the gear wheel transmission mechanism in the blade insertion position, and FIG. 5b) shows the arrangement of the rollers in the blade insertion position in a sectional view. FIG. 6a) shows a side view of the gear wheel transmission mechanism in the position of the engaged blade, and FIG. 6b) shows the arrangement of the rollers in the position of the engaged blade in a sectional view. FIG. 7a) shows a side view of the gear wheel transmission mechanism in the blade extraction position, and FIG. 7b) shows the arrangement of the rollers in the blade extraction position in a sectional view. FIG. 8 shows a side view of the device of FIG. 1 viewed from the right with a handwheel. FIG. 9 shows a perspective view of the pressure roller. FIG. 10 shows a perspective view of a cutting roller having a blade. FIG. 11a) shows a top view on the blade and FIG. 11b) shows a side view of the blade.

  FIG. 1 shows a front view of a device 10, hereinafter called a paper dispenser, for feeding a paper section of a predetermined length. The device comprises a housing 12 having a cover hood 16 as well as a back wall 14 to be attached to a wall (not shown). Extending from the back wall 14 are holding elements 18, 20 for storing the paper roll 22. A paper web 24 is fed out of the paper roll 22, which is housed in a device 26 for cutting and feeding the paper section. The device 26 comprises a right side wall 28 as well as a left side wall 30 that are connected to the back wall 14. The side walls 28, 30 are connected on the front side via fasteners 32. A push spring 34 extends from the fastener 32 along the vertical direction, which is in contact with the surface 36 of the paper web 24 or paper roll 22 and prevents the paper web 24 from wrinkling. The pressure spring is pivotally mounted about the hinge 38 and can be swung to the right or left along the side to facilitate changing the paper roll 22. The length of the pressure spring is to prevent the cover hood 16 from being closed by the pressure spring 34 in a position that is turned along the side surface.

  FIG. 2 shows a cross-sectional view of the paper dispenser 10 along section line AA. The device 26 comprises a cutting roller 40 having a fixed blade 42 extending along the longitudinal centerline of the cutting roller and a pressure roller 44 having a slit-shaped opening 46, which is along the longitudinal direction of the pressure roller 44. Into which the blade 42 can engage during the synchronous movement of the rollers 40, 44. Each of the rollers 40, 44 is supported on the side walls 28, 30 by shaft journals 48, 50. At their ends, each of the shaft journals 48, 50 features a gear wheel 52, 54 or 56, 58 which serves to connect the rollers 40, 44.

  Deflection rollers 60, 62 are provided for guiding the paper web, each of which is supported on mandrels 64, 66, which extend between side walls 28, 30.

  The paper web 24 is deflected by deflecting rollers 60, 62 and guided along an outer peripheral section 72 around the pressure roller 44 by outer peripheral guide elements 68, 70. One end 74 of the paper web 24 is guided through an extraction opening 76 in the cover hood 16 and can be grasped by the user. In order to ensure that the end 74 of the paper web is guided into the extraction opening 76, guide elements are provided in the area of the extraction opening 76 and along the pressure roller 44 between the side walls 28, 30. Extend.

  The guide elements 68 and 70 are connected to the area of the cutting roller 40 by guide lands 71 extending in the outer peripheral direction, and are arranged at intervals. The guide lands 71 serve to guide the paper web 24 into the area of the guide elements 68, 70, where the blade 42 engages the opening 46 of the pressure roller 44.

  FIG. 3 shows a side view of the paper dispenser 10, illustrating the cutting wheel gear wheel 52 connected to the shaft journal 48 and the gear wheel 56 of the pressure roller 44 connected to the shaft journal 50. The gear wheels 52 and 56 form a gear unit with a transmission ratio of 1: 1, and the paper web 24 that is tightly stretched along the outer peripheral surface 72 of the pressure roller 44 is pulled by the paper end 74. Synchronous movement of the roller is caused, sometimes in such a way that it is cut or pierced by the blade 42, so that during this cutting operation the blade 42 penetrates the slit-shaped opening 46.

  Due to the frictional engagement between the paper web 24 and the outer peripheral surface of the pressure roller, the gear wheel 52 has a pulling movement acting on the paper end 74 in the direction of arrow 82 in accordance with FIG. Coupled to the sidewall 30 via a tension spring 80 to cause rotation of the pressure roller 44 in the direction. Due to the coupling of the gear wheel, the gear wheel 48 is moved in the direction of arrow 86, which causes the tension spring 80 to pull. After half rotation of the pressure roller 44, the tension spring reaches its maximum tension, so the tension spring 80 contracts while continuing to pull the paper end 74, which causes automatic further conveyance, It then guides a new paper edge from the opening 76.

  4-7 show the individual position of the cutting roller 40 relative to the pressure roller 44 when a pulling motion acts on the paper edge 74. FIG.

  Figures 4a) and 4b) show the gear wheels 48, 50 and the rollers 40, 44 in a neutral position, where the tension spring 80 is loose. In this, the effective line 88 of the tension spring 80 extends substantially perpendicular to the line 90 connecting the shaft ends 48, 50. The paper web 24 is in contact with the pressure roller 44 along its outer peripheral surface and is pulled tightly in the area of the slit-shaped opening 46.

  FIGS. 5 a) and 5 b) show, for example, the gear wheels 48, 50 and the rollers 40, 44 in the blade engagement position after a rotation of about 25 °, whereby the blade 42 penetrates the paper web, Inserted into the slit-shaped opening 46, which initiates the detachment process. In this position, the blade 42 begins to contact the paper web. Further pulling of the paper end 74 finally results in the paper section cross-section being cut (perforated) by the penetration of the blade 42 into the slit-shaped opening 46.

  FIGS. 6 a) and 6 b) show the gear wheels 48, 50 and the rollers 40, 44 in the position of the engaged blades, where the blades 42 are fully contained in the slit-shaped openings 46.

  Pulling the paper end 74 causes the tension spring 80 to be pulled further, so that, according to FIGS. 7a) and 7b), the blade 42—after rotation of about 120 ° —is no longer a slit-shaped opening. 46 is not engaged (blade extraction position).

  Pulling the paper end 74 serves to pull the tension spring 80 further until the rollers 40, 44 complete a half turn. After the effective line 88 of the tension spring 80 exceeds the center of the gear wheel, the contraction of the tension spring 80 results in automatic further transport of the paper web 24 along with the separated paper section. Thereafter, the paper section 74 can be cut from the paper web 24 along a perforated cut line.

  FIG. 8 shows a side view of the paper dispenser 10 from the right side and shows the gear wheels 54 and 58 in the engaged position. The hand wheel 92 is coupled to a gear wheel 58 for the pressure roller 44. The handwheel 92 facilitates manual operation of the pressure roller 44 for mounting the paper web 24 after the paper roll 22 is replaced, for example.

  The gear wheel 58 of the pressure roller 44 intersects with a locking lever 94 that is pivotally mounted on the rod 96. The locking lever locks the gear wheel 58 along the direction of arrow 98.

  FIG. 9 shows a perspective view of the pressure roller 44 having a shaft 50 and a slit-shaped opening 46. The slit-shaped opening 46 extends along the entire longitudinal direction of the pressure roller 44 along the entire longitudinal range of the latter. The slit-shaped opening 46 comprises four sections 98, 100, 102, 104 that are separated by bridges 106, 108, 110 extending radially and circumferentially.

  FIG. 10 shows a perspective view of the cutting roller 40 having the fixed blade 42. The blade 42 includes a blade edge 112 as well as a blade blade 114, which is housed in the cutting roller 40. In the illustrated example embodiment, the cutting roller 40 comprises two elements 116, 118, which have a semicircular cross section between which a blade blade 114 is sandwiched.

  The blade edge 112 comprises four sections 120, 122, 124, 126 that are separated from each other by cuts 128, 130, 132. The individual sections 120, 122, 124, 126 of the blade edge 112 engage the sections 98, 100, 102, 104 of the slit-shaped opening 46, whereby the bridges 106, 108, 110 are notched 128, 130. , 132 is engaged. The outer surface 134 of the cutting roller 40 is provided with outer circumferential grooves 136, 138, 140 that correspond to the incisions 128, 130, 132. The outer peripheral grooves 136, 138, 140 engage with the guide lands 71 of the outer peripheral guide elements 68, 70, whereby the guide lands extend in the outer peripheral direction and the lateral direction with respect to the longitudinal center line of the cutting roller 40. Thus, the section of the outer peripheral surface 134 of the cutting roller 40 together with the inner surface of the guide land 71 forms a guide surface, which simplifies the guidance of the paper web, especially during the loading process.

  FIG. 11 a) shows a top view of the blade 42 with the blade edge 112 as well as the blade blade 114. The blade 42 is embodied as a stamped part.

  FIG. 11 b) shows a side view of the blade 42. The blade edge 112 is bent with respect to the blade blade 114 by an angle α, where α is in the range of 20 ° ≦ α ≦ 60 °, and preferably α = 30 °. This ensures that the blade edge 112 is inserted into the slit-shaped opening 46 at the optimum angle for cutting the paper web 24.

  In accordance with an aspect of the invention having independent inventive advantages, the outer sections 120, 126 have triangular cutting edges so that the cutting edge sections 142, 144 or 146, 148 are side edges 150, 152 or It is embodied in a diagonally downward shape in the direction toward the cuts 128 and 132.

  Embodiments of the present invention are characterized in that the cutting edges of the central sections 122, 124 have sides 154, 156; 158, 160 that rise in the direction of the cuts 128, 130, 132, which is possible It serves to ensure that the longest cut edge sections 162, 164, 166, 168 are formed adjacent to the cuts 128, 130, 132, so that the cut edge section is an accurate method In order to cut the paper web with the pressure roller bridges 106, 108, 110, which in turn facilitates a simple tearing operation.

  With respect to the present embodiment of the blade edge 112, the notches 128, 130, 132 only allow the paper web 24 to be subject to some kind of perforation instead of being subject to complete continuous cutting. As such, even after the cutting process, the automatic propulsion due to the tension spring 80 is sufficient to transport the paper section 74 to be torn off from the paper dispenser without any paper jam risk. Note also that there are. After the perforated paper section 74 is fed through the opening 76, it is simply torn off by the user, which separates it from the remaining elements in the paper web 24.

  This requires minimal pulling force, so that further transport of the paper web 24 is prevented by the restoring force of the tension spring 80.

First, fine adjustment of the spring tension of the blade edge 112 intersecting the slit-shaped opening 46 with the sections 98, 100, 102, 104 and the bridges 106, 108, 110, and secondly, the tension spring 80. Thus, as a result of embodiments of the present invention, the embodiments of the present invention allow for the cutting or rather perforation of paper webs of different densities and strengths. In particular, the paper dispenser 10 of the present invention is for transporting a paper web having a density of 2 × 25 g per mm ² , ie a paper web that can only be used normally in an electric paper dispenser. In the prior art, mechanical operated paper dispenser is typically thin paper web having a density of mm ² per 2 × 17 g, that is, operation using a single-layer paper.

Claims (11)

A device (10) for feeding a length of paper section having a device (26), operated by pulling the end (74) of the paper web, on a paper roll (22) Serving to detach the paper section from the rolled paper web (24) and to provide easy manual access to the paper web (24) following release of the separated paper section. The device (26) includes at least one cutting roller (40) having a width corresponding to at least the entire width of the paper web and a blade (42) extending substantially across the entire roller width and projecting strictly from the roller shell. ), And the cutting roller (40) has a slit-shaped opening (46) corresponding to the blade (42). Has a gear wheel; in device associated with the pressure roller (44) coupled to said cutting roller (40) via (52, 56 54, 58),
A gear wheel (52, 56; 54, 58) coupled to the cutting roller (40) or the pressure roller (44) is eccentrically coupled to the tension spring (80), and the end (74) of the paper band. Pulling both the detachment of the paper section and the pulling of the tension spring (80) to the turning point by penetration of the blade (42) from the outside into the slit-shaped opening (46) For this purpose, the paper web (24) is stretched tightly along the outer peripheral surface (72) of the pressure roller (44), resulting in the components remaining intact while being cut in cross-section, and the folded back After the point is exceeded, the cutting roller by contraction of the tension spring (80) to feed the paper section and a new paper end. Characterized in that both said and a pressure roller (44) and 40) is continuously moved in the opposite direction, the device.   A first end of the tension spring (80) is eccentrically connected to the gear wheel (52) of the cutting roller (40), and a second end of the tension spring (80) is a part of the housing. The effective line (88) of the tension spring (80) extends perpendicular to the line (90) connecting the axes (48, 50) of the gear wheels (52, 56; 54, 58). The device according to claim 1, wherein:   Device according to claim 1 or 2, characterized in that the gear wheel (52, 56; 54, 58) forms a transmission mechanism with a transmission ratio of 1: 1.   The outer peripheral surface (134) of the cutting roller (40) is arranged at a distance from the outer peripheral surface (72) of the pressure roller (44). The device according to item.   The blade (42) comprises a blade blade (114) having teeth (120, 126) and / or groups of teeth (122, 124) spaced along the length of the blade (114); Teeth (120, 126) and / or groups of teeth (122, 124) are separated from each other by incisions (128, 130, 132), and each of the incisions (128, 130, 132) is relative to each other. In parallel, two cutting edges (162, 164, 166, 168) extending transversely to the longitudinal direction of the blade (42) are provided, and the cutting edges (162, 164, 166, 168) are further provided. Teeth at least one of which contacts the notches (128, 132) or teeth that contact the notches (128, 130, 132) Characterized in that it is a cutting edge of a group (122, 124), the device according to any one of claims 1-4.   The slit-shaped opening (46) of the pressure roller (44) includes a bridge (106, 108, 110) extending along an outer peripheral direction, and a width and a distance between the bridges (106, 108, 110). Corresponds to the width and spacing between the notches (128, 130, 132) in the blade, so that the bridge during the relative movement between the cutting roller (40) and the pressure roller (44) (106, 108, 110) engages said blade incisions (128, 130, 132) and intersects adjacent cutting edges (162, 164, 166, 168) in a scissor-like manner. The device according to any one of claims 1 to 5.   A device according to any one of the preceding claims, characterized in that the blade (42) protrudes from the cutting roller (40) and has a blade edge (112) forming an angled section. .   The angled section comprises teeth (120, 126) and / or groups of teeth (122, 124) and is deflected at an angle α where 15 ° ≦ α ≦ 50 °, preferably α = 35 °. Device according to any one of the preceding claims, characterized in that it is angled with respect to the blade (144) along the axis.   The cutting roller (40) preferably comprises two sections (116, 118) with a semicircular cross section, and the blade (114) of the blade is in a position between the semicircular sections (116, 118). Device according to any one of the preceding claims, characterized in that it is fixed, for example clamped.   The cutting roller (40) is provided with an outer peripheral groove (136, 138, 140) along its outer peripheral surface (134), each of which corresponds to one of the notches (128, 130, 132). 10. A device according to any one of claims 1 to 9, characterized in that the width and depth of the grooves preferably correspond to the width and depth of the notches.   11. The distance between the bridges (106, 108, 110) of the pressure roller (44) corresponds to the width of a group of teeth (122, 124) at the blade edge. The device according to item.