Apparatus for Shredding Value Documents

Abstract

A shredding apparatus for value documents, has two mutually counter-rotatable roller-shaped cutting devices which are disposed opposite each other with reference to a transport path of the value documents to be shredded, in order to cut up the value documents transported along the transport path with the aid of the cutting edges into a multiplicity of value document shreds. A stripper is allocated to each of the cutting devices, which stripper has several stripper elements arranged parallel to each other, which stripper elements engage between the cutting edges of the respective cutting device in order to remove the value document shreds from the cutting edges. The shape of the stripper elements is chosen such that the stripper elements on the front side of the respective cutting device, said front side facing the transport path of the value documents, engage between the cutting edges of the respective cutting device.

Claims

1-15. (canceled)

16. An apparatus for shredding value documents, comprising: at least two mutually counter-rotatable roller-shaped cutting devices which are disposed opposite each other with reference to a transport path of the value documents and each of which have on their surface a multiplicity of cutting edges, wherein the cutting edges of the two cutting devices mutually engage with each other on the mutually facing front sides of the two cutting devices in order to cut the value documents fed along the transport path with the aid of the cutting edges into a multiplicity of value document shreds, wherein to each of the cutting devices, a stripper is allocated which has several stripper elements which are arranged to be mutually parallel and so arranged that the stripper elements engage between the cutting edges of the respective cutting device in order to remove the value document shreds from the cutting edges of the respective cutting device, wherein the shape of the stripper elements is chosen such that the stripper elements engage between the cutting edges of the respective cutting device at the front side of the respective cutting device, said front side facing the transport path of the value documents.

17. The apparatus according to claim 16, wherein the stripper surrounds the respective cutting device only at the front side facing the transport path and the lower side of the cutting device.

18. The apparatus according to claim 16, wherein the respective stripper elements overlap with the outer contour of the respective cutting device in an azimuthal angle portion of the cutting device that is reached by the value document shreds after the cutting of the value documents.

19. The apparatus according to claim 16, wherein the overlapping angle portion of the respective cutting device in which the stripper elements overlap with the outer contour of the respective cutting device—viewed along the direction of rotation of the cutting device—is located in an azimuthal angle range of between 20° and 100° to the connecting line of the two roller-shaped cutting devices.

20. The apparatus according to claim 16, wherein the shape of the stripper elements is chosen so that the overlapping angle portion in which the stripper elements and the outer contour of the cutting device overlap, extends over at most 50°.

21. The apparatus according to claim 16, wherein mutually adjacent stripper elements of the respective cutting device are separated from each other by respectively one spacer element arranged outside the respective cutting device.

22. The apparatus according to claim 21, wherein the side of the spacer elements facing the respective cutting device has a radial spacing of at most 1 mm from the outer contour of the respective cutting device.

23. The apparatus according to claim 16, wherein the stripper elements have substantially the form of two angle legs which enclose an inner angle amounting to between 110° and 160°.

24. The apparatus according to claim 16, wherein, at the lowest angular position of the cutting device, the stripper elements have a radial spacing of at least 5 mm from the surface of cutting device.

25. The apparatus according to claim 16, wherein the shape of the stripper elements is chosen such that the spacing of the stripper elements from the surface of the cutting device increases continuously along the direction of rotation of the cutting device starting from the overlapping angle portion.

26. The apparatus according to claim 16, wherein a free space exists in radial direction at the back side of the respective cutting device, said free space extending from the surface of the cutting device in radial direction.

27. The apparatus according to claim 26, wherein the azimuthal angle range of the cutting device in which the free space extends in radial direction over a depth of at least 3 cm, is at least 30°.

28. The apparatus according to claim 26, wherein the free space is located in an azimuthal angle range between 90° and 180° to the connecting line of the two roller-shaped cutting devices.

29. The apparatus according to claim 16, wherein the stripper elements and the spacer elements are mounted in a receiving means present outside the cutting device.

30. An apparatus for processing value documents, comprising: a shredding apparatus for shredding value documents according to claim 16 and a transport device for transporting the value documents and for feeding the value documents to the shredding apparatus.

Description

[0017] Further advantages of the present invention will become apparent from the following description of the exemplary embodiments. There are shown:

[0018] FIG. 1 a-e a first exemplary embodiment of the shredding apparatus (FIG. 1e) and components thereof (FIG. 1a-d),

[0019] FIG. 2 a 3D view of the shredding apparatus of FIG. 1e from below,

[0020] FIG. 3a-b a second exemplary embodiment of the shredding apparatus.

[0021] In FIG. 1a, a first exemplary embodiment is shown of a roller-shaped cutting device 1 having a multiplicity of cutter disks 7 which are separated from each other by spacer disks 5. The cutter disks 7 have several notches along their circumference between which the cutting edges 10 of the respective cutter disk are located. The cutter disks 7 and the spacer disks 5 are arranged on an axle body 6, through the center of which there extends the rotational axis A of the cutting device 1. The thickness of the cutter disks 7 is slightly smaller than that of the spacer disks 5, so that the cutter disks 17 of the second cutting device (see FIG. 1e) do not touch the cutter disks 7 of the first cutting device in mesh. The cutter disks 7 and the spacer disks 5 are connected firmly to one another in the axial direction and are supported rotatably about the axle body 6.

[0022] The stripper has a multiplicity of stripper elements 2, each of which engage a gap between two cutter disks 7 and extend as closely as possible to the spacer disks 5, however without touching them. To ensure a fixed distance between the stripper elements 2, these are separated from each other by spacer elements 4, see FIG. 1b. The stripper elements 2 are configured angularly, wherein the two angle legs in this example enclose an internal angle α of about 120°. The spacer elements 4 of the stripper on their side facing the transport path T of the value documents have a radial distance c of no more than 1 mm from the outer contour K of the cutting device 1.

[0023] The stripper elements 2 and their spacer elements 4 are mounted in a receiving means 3 present outside the cutting device. Said receiving means 3 can be constituted by an adhesive-filled tub in which the stripper elements 2 and the spacer elements 4, in particular their base 8, are fixed with adhesive, for example with epoxy resin. In the adhesive of the adhesive-filled tub 3 also two frame elements 9 are fixed which serve for holding the stripper.

[0024] The stripper is so positioned and the thickness of the spacer elements 4 of the stripper is chosen correspondingly, such that the stripper elements 2 protrude between the cutter disks 7 of the cutting device 1. In order for the stripper elements 2 not to rub against the cutter disks 7 between which they protrude, the thickness of the stripper elements 2 is slightly smaller than that of the spacer disks 5 of the cutting device 1. The stripper elements 2 remove value document shreds adhering to the cutting device 1 to prevent that said value document shreds are drawn through between the cutting device 1 and the stripper elements 2.

[0025] The stripper elements 2 overlap with the outer contour K of the cutting device 1—viewed along the direction of rotation D of the cutting device 1—at an angle portion ω located in an angle range between 20° and 80° to the connecting line L of the two roller-shaped cutting devices. The overlapping angle portion co starts in this example at β=50° and ends at γ=68° and extends over approximately 18°.

[0026] FIGS. 1c and 1d show three-dimensional views of the stripper and its holder 3. It can be seen here that between the two frame parts 9 there is a free space F that is disposed in the lower region of the back side R (facing away from the transport path T) of the cutting device 1 of FIG. 1a. The free space F extends from the surface of the cutting device 1 in radial direction (in FIG. 1a to the lower left). The free space F extends between the stripper holder 3 and the mounting pin 8 which is inserted through the receiving hole 12 of the frame part 9, see FIG. 2. Relative to the connecting line L that connects the center points of the two roller-shaped cutting devices 1 and 1′ of FIG. 1e, the free space F in this example extends from the azimuthal angle of 115° to 153° clockwise. The free space F in this example thus extends over an azimuthal angle range 6 of 38°.

[0027] In FIG. 1e a shredding apparatus is shown that has two mutually counter-rotatable roller-shaped cutting devices 1, 1′ (rotational direction D or D′). With the aid of a transport roller pair 11, 11′ the value documents are fed along the transport path to the shredding apparatus and shredded by the same.

[0028] The cutting devices 1, 1′ are configured to be axially symmetrical to each other and arranged so that their cutting edges 10 engage each other at the front sides V of the two cutting devices facing each other, see FIG. 1a. By the cutting edges 10 of the two cutting devices value documents 20 fed to the shredding apparatus along the transport path T are cut into a multiplicity of value document shreds. The value document shreds are sucked down. The air flow is not only effected along the two central arrows S in the extension of the transport path 20, but also from the left cutting device 1 to the lower left and/or from the right cutting device 1′ to the lower right. Since there exists the free space F between the frames 9, 9′, value document shreds drawn through and entering said free space can be sucked down.

[0029] FIG. 2 shows a 3D view of the shredding apparatus from below, i.e. viewed from the output side, at which the value document shreds are transported out of the shredding apparatus.

[0030] In FIGS. 3a and 3b a further embodiment of the shredding apparatus is shown, in which a different shape of the stripper elements 2 has been chosen. The angle of the apex of the two angle legs of the stripper elements 2 is located substantially farther away from the surface of the cutting device than in the stripper elements 2 of FIG. 1a-e. For this reason, the spacing of the stripper elements at the lowest angular position of the cutting device is substantially larger and the holder 3 of the stripper elements 2 can be placed further away from the roller-shaped cutting device 1. This results in an even bigger free space in the lower region of the back side R of the cutting device, in which drawn-through value document shreds can be accommodated and fall down or can be sucked off.