Stripping Device

Abstract

A stripping device for stripping sheet-shaped objects from a roller includes at least one stripper. The stripper is mounted rotatably about a bearing and includes stripping portion configured to be tapering to a point and a support portion which is different from the stripping portion. The stripping portion and the support portion are arranged relative to each other and the stripper is mounted such that, when the stripper is pressed against the roller with prestressing during operation, the stripper has two mutually spaced apart contact points with the roller, which contact points are defined by the stripping portion and the support portion of the stripper.

Claims

1-15. (canceled)

16. A stripping device for stripping sheet-shaped objects from a roller, including at least one stripper which includes a stripping portion configured to be tapering to a point and a support portion, wherein the stripping portion and the support portion are so arranged relative to each other and the stripper it is so mounted rotatably about a bearing that, when, during operation with a roller, the stripper is pressed against said roller with prestressing, the stripper has two contact points with the roller which are defined respectively by the stripping portion and the support portion of the stripper.

17. The stripping device according to claim 16, wherein the stripper is adapted such that, during operation with a roller, the bearing is arranged, with reference to a rotational axis of the roller, radially spaced apart from the roller and between the two contact points.

18. The stripping device according to claim 17, wherein an angle enclosed in the direction of the roller between a first line which connects the bearing to the one contact point and a second line which connects the bearing to the other contact point amounts to between around 60 and 120.

19. The stripping device according to claim 16, wherein the stripping device includes at least two strippers.

20. The stripping device according to claim 16, wherein the at least one stripper is mounted axially to be rotatable about an axis which is arranged parallel to a rotational axis of the roller, when, during operation with a roller, the stripper is pressed against said roller with prestressing.

21. The stripping device according to claim 20, wherein the stripping device includes a plurality of strippers which are each rotatably mounted separately.

22. The stripping device according to claim 20, wherein the at least one stripper is mounted on gimbals.

23. The stripping device according to claim 22, wherein the stripping device includes a plurality of strippers which are each rotatably mounted separately.

24. The stripping device according to claim 16, wherein the stripping device includes a carriage on which the at least one stripper is arranged, wherein the carriage is adapted to be movably guided and, during operation with a roller, is adapted to be pressed in the direction of said roller with prestressing.

25. The stripping device according to claim 24, wherein the stripping device includes a plurality of strippers which are respectively connected to the carriage separately via a spring element.

26. The stripping device according to claim 24, wherein the at least one stripper is connected to the carriage via a spring element which, during operation with a roller, is adapted to be prestressed against said roller due to the prestressing of the carriage.

27. The stripping device according to claim 26, wherein the stripping device includes a plurality of strippers which are respectively connected to the carriage separately via a spring element.

28. The stripping device according to claim 16, wherein the support portion is configured to be rounded in the region in which, during operation with a roller, it is adapted to touch said roller.

29. The stripping device according to claim 16, wherein the at least one stripper includes an angular portion, wherein the stripping portion is arranged at the end of a first angular arm and the support portion is arranged at the end of a second angular arm, and wherein the bearing of the at least one stripper is arranged in the region in which the two angular arms meet.

30. A system including at least one roller for transporting sheet-shaped objects and a stripping device according to claim 16 for stripping the sheet-shaped objects from the roller.

31. The system according to claim 30, wherein the system is a bank-note processing machine.

32. The system according to claim 30, wherein the roller is a storage roller of a foil winding repository for intermediate storage of sheet-shaped objects.

33. The system according to claim 32, wherein the system is a bank-note processing machine.

Description

[0028] The present invention will hereinafter be described by way of example with reference to the attached drawings. The figures are described as follows:

[0029] FIG. 1 a preferred embodiment of a stripping device according to the invention during operation in a side view and

[0030] FIG. 2 the stripping device of FIG. 1 in a perspective view.

[0031] With reference to FIG. 1, a stripping device 10 for stripping sheet-shaped objects 100 from a roller 200 is shown. The roller 200 in the shown example corresponds to a storage roller of a foil winding repository for storing the sheet-shaped objects, for example in a bank-note processing machine. The sheet-shaped documents 100 are stored between different layers of a foil 150, as is indicated in FIG. 1. In the course of the process, therefore the diameter of the storage roller 200 will increase inherentlyand decrease again during the outputting of the stored documents 100.

[0032] It can occur that the documents 100 are also stored in bundles, which can lead to uneven areas in the roller surface. The representation in FIG. 1 is not to scale, but illustrates the situation only schematically.

[0033] The stripping device 10 can alternatively be used also in connection with rollers which are provided merely for transporting sheet-shaped objects, but not for intermediate storage.

[0034] During the outputting of the sheet-shaped documents 100 from the storage roller 200, it can occur that individual documents remain adhering to the roller 200. To prevent this, the stripping device 10 is used.

[0035] The stripping device 10 includes at least one stripper 20 which is rotatably mounted about a bearing 26. In the shown example, a purely axial bearing 26 is used about an axis which extends parallel to the rotational axis 210 of the roller 200. Alternatively, also a mounting on gimbals can be used, allowing additionally a rotation about an axis which extends perpendicularly to the rotational axis 210.

[0036] As shown with reference to FIG. 2, the stripping device 10 actually includes a plurality of identical strippers 20, 20 which are arranged next to each other in the axial direction of the roller 200. In the following, initially only one of these strippers 20 will be described in more detail.

[0037] The stripper 20 includesviewed in cross section perpendicularly to the rotational axis 210 of the roller 200a stripping portion 22 tapering to a point for stripping sheet-shaped objects from the roller 200. As rudimentarily recognizable in FIG. 2, the stripping portion 22 touches the roller 200 during operation along a contact edge which extends in the axial direction of the roller 200.

[0038] The stripper 20 further comprises a support portion 24. As explained in the following, said support portion is arranged and adapted to form a second contact point with the roller surface during operation, in addition to the stripping portion 22. The stripper 20 is configured and mounted in such a way that, during operation, when the stripper 20 is pressed against the roller 200 with prestressing, the stripper 20 always forms two contact points 22A, 24A with the roller surface. The contact points 22A, 24A are therein defined by precisely those points in which the stripping portion 22 and the support portion 24 are in contact with the roller 200.

[0039] This is ensured by arranging the bearing 26, with reference to the rotational axis 210 of the roller 200, radially spaced apart from the roller 200 and between the two contact points 22A, 24A. In other words, the bearing 26, viewed in cross section perpendicularly to the rotational axis 210 of the roller 200, is arranged radially spaced apart from the roller 200 and within an angle segment W which is defined by the rotational axis 210 and the two contact points 22A and 24A.

[0040] The angle which is enclosed in the direction of the roller 200 between a first line connecting the bearing 26 to the first contact point 22A and a second line connecting the bearing 26 to the second contact point 24A, typically amounts to between around 60 and 120, in the shown example around 90.

[0041] The stripper 20 is connected to a carriage 30. The carriage 30 is adapted to be movably guided and to be pressed against the roller with prestressing during operation in a corresponding apparatus, for example a bank-note processing machine. The movable guidance of the carriage preferably extends substantially in a radial direction with reference to the roller 200 or such that the stripper 20 is displaced radially upon moving the carriage 30.

[0042] In the shown embodiment, the stripper 20 is connected to the carriage 30 via a further spring element 40, which can for example be configured as a spring plate or the like. In this way, even small irregularities of the roller surface can be caught.

[0043] The stripper 20 in the shown example is configured angularly and includes two angular arms 21 and 23. The bearing 26 is arranged in the region of the stripper 20 in which the two angular arms 21, 23 meet. At the end of the first angular arm 21 the stripping portion 22 is arranged. At the end of the second angular arm 23 the support portion 24 is arranged. The support portion 24 is configured to be rounded in the region where it touches the roller 200. Preferably, this region can correspond to a surface portion of a circular cylinder, for example.

[0044] In FIG. 2 the arrangement of FIG. 1 is shown in perspective view. It can be seen here that the stripping device 10 has a plurality of identical strippers 20, 20. The number of strippers 20, 20 can be variable. The embodiment shown includes six strippers 20.

[0045] Each of these strippers 20, 20 is rotatably supported separately and separately connected to the carriage 30 via a spring element 40, 40. In this way, the surface of the roller 200 can be scanned optimally by means of the plurality of strippers, so that sheet-shaped objects 100 adhering to the roller 200 can be stripped reliably also when the roller radius varies and/or there are uneven areas of the roller surface.