SHEET DISPENSING APPARATUS

Abstract: Sheet dispensing apparatus comprises first conveying means (5, 7, 17) for dispensing sheets along a feed path to a stacking position; first detection means (1) for detecting un­ suitable sheets; and diverting means (13) for diverting detec­ ted unsuitable sheets along a first reject path (10, 20) to a dump (23). Stacking means (24) are positioned downstream of the diverting means (13) for stacking sheets at the stacking position. Second conveying means (26, 28; 31, 32) are provided for selectively delivering the stacked sheets (28) to a dispense outlet (33) or along a second reject path (31, 34; 42, 43, 44; 10, 20) to the dump (23).

Description: The invention relates to sheet dispensing apparatus particularly for dispensing banknotes. There is an increasing demand for accurate sheet dispensing apparatus particularly in the field of dispensing banknotes where it is clearly very important that a correct quantity of banknotes are dispensed. GB-A-2123592 describes automatic banknote transaction apparatus for both dispensing and receiving banknotes. In its dispense mode, banknotes are withdrawn selectively from a pair of cassettes and fed through a detection system which detects their general fitness, unfit notes being fed back to a reject cassette. The notes are stacked adjacent an outlet opening to enable the stack to be withdrawn by the user. This apparatus is very complex and does not deal with the possibility that an incorrect number of banknotes may be stacked at the outlet. US-A-4066253 describes a banknote dispensing system in which a stack of banknotes is formed in a collecting chamber on a pivoted bottom plate. If the stack is correctly formed then the plate pivots downwardly to allow the stack to fall down beside a dispensing aperture. If the stack is not correctly formed then a guide plate drops down so that when the bottom plate pivots the stack falls instead along the guide plate into a secure magazine. In accordance with the present invention, sheet dispensing apparatus comprises first conveying means for dispensing sheets along a feed path to a stacking position; detection means for detecting unsuitable sheets; diverting means comprising a movable guide cooperating with the first conveying means to guide sheets along the first conveying means and movable in response to an output signal from the detection means to divert detected unsuitable sheets along a first reject path to a dump; and stacking means downstream of the diverting means for stacking sheets at the stacking position for dispensing through a dispense outlet and is characterised by second conveying means for selectively delivering the stacked sheets from the stacking position to the dispense outlet or along a second reject path to the dump; and in that the dispense outlet and the dump are positioned at opposite lateral ends of the apparatus. The detection means may detect sheets as being unsuitable if for example two or more sheets are fed simultaneously, a folded or damaged sheet is fed or the sheet fails an authenticity test. The present invention enables not only this test or tests to be made but enables the subsequent stack of sheets to be rejected and this is important if for example the user decides he does not after all wish to receive the sheets or if there has been some error in the feed and an incorrect number of sheets have been fed to the stack. Thus the invention provides a common dump which reduces cost and simplifies use of the apparatus. Preferably, part of the second reject path is formed by the first reject path. This provides a particularly convenient and compact apparatus which is also simple in construction since it can utilise the same conveying means for the first reject path and part of the second reject path and thus reduce the chances of jamming or other malfunctions. The diverting means may comprise a pivoted guide member which acts to divert sheets away from the first path into the reject path if the first detection means detects the passage of for example two overlapping sheets. Preferably, the stacking means comprises a rotatable member having a plurality of radially outwardly extending tines for receiving sheets from the feed path; and stripper means cooperating with the rotatable member for stripping sheets from the rotatable member to form a stack of sheets, the stripper means being pivotable from a first position in which sheets are stripped from the rotatable member to a second position in which the stack of sheets is urged into engagement with the second conveying means. This again has the advantage of enabling compact apparatus to be constructed by using a dual function stripper means. Preferably further diverting means are provided downstream of the stacking position to divert the stacked sheets either to the dispensed outlet or to a dump. Although the stripper means could be provided by a plate member, preferably, the stripper means comprises one or more movable conveyers. Two examples of banknote dispensing apparatus in accordance with the present invention will now be described with reference to the accompanying schematic drawings, in which: Figure 1 illustrates part of one example of dispensing apparatus; Figure 2 illustrates the stacking means of the apparatus shown in Figure 1; and Figure 3 illustrates part of a second example of dispensing apparatus. The banknote dispensing apparatus shown in Figure 1 comprises a conventional detection module 1 to which banknotes are fed from cassettes (not shown) by conveying means (not shown). The module 1 includes a pair of rollers 2, driven via a drive gear 3 by a motor (not shown), between which the banknotes pass and the separation of which is monitored. If the separation between the two rollers 2 exceeds a threshold indicating the passage of overlapping or folded notes, an output signal is generated by the module 1. Banknotes are guided from the module 1 between a pair of guides 4 under the action of rollers 5 driven via the gear 3 to a diverting station 6. The diverting station 6 comprises a belt 7 mounted around rollers 8, 9; a belt 10 mounted around rollers 11, 12; and a guide member 13. The guide member 13 is pivotally mounted at 14 to a housing part of the apparatus (not shown). The guide member 13 has a first curved guide surface 15 facing the roller 8 and a second planar guide surface 16 facing the roller 12. In the position shown by dashed lines in Figure 1, the guide member 13 is arranged so that notes which reach the diverting station 6 from the module 1 are guided around the roller 8 and between the belt 7 and a belt 17 mounted about rollers 18, 19. If the module 1 indicates the passage of overlapping banknotes, the guide member 13 will be caused to pivot to the position shown in solid lines in Figure 1 in which the guide surface 15 engages the belt 7 and thus the unsuitable banknotes will be guided around the roller 12 and between the belt 10 and a belt 20 mounted around rollers 21, 22. These unsuitable notes will be fed by the belts 10, 20 to a dump cassette 23 which is partially illustrated in Figure 1. Banknotes that are suitable are fed by the belts 7, 17 to a conventional rotatable member comprising three conventional stacking wheels 24 having curved radially outwardly extending tines 25 defining sheet receiving slots. The stacking wheels 24 rotate in an anticlockwise direction and carry notes around the wheels into engagement with belts 26 (Figure 2) mounted around rollers 27. The engagement of each note with the belts 26 causes the note to be stripped from the stacking wheels 24 and to be stacked in a stack 28 resting against a belt 29 which is stationary at this time. The belt 29 is mounted around rollers 30. When the notes have been stacked in the stack 28, the belts 26 are pivoted in anti-clockwise direction into the position shown at 26′, in which the stack 28 is urged against the belt 29. If the number of banknotes in the stack 28 is correct, the belts 26, 29 are rotated to dispense the stack 28 between belts 31, 32 to a dispense outlet 33. (The belt 31 is entrained about rollers 34 while the belt 32 is entrained about rollers 35.) A guide member 36 is pivotally mounted to the apparatus and has a curved guide surface 37 facing the adjacent roller 30. In the position shown in Figure 1, the guide member 36 guides the stack of sheets to the dispense outlet 33. If the user decides he does not wish to receive the stack of sheets or detection apparatus has detected that the stack of sheets is unsuitable for some reason, the guide member 36 is pivoted so that the guide surface 37 engages the belt 29 and the stack of sheets 28 instead will be guided between a further guide surface 38 and the drive belt 31, between the belt 31 and a further belt 39 to a feed path defined between a pair of guide surfaces 40. The belt 39 is entrained about rollers 41. The stack of sheets 28 is moved between the guide surfaces 40 since it will be sandwiched between a pair of belts 42, 43. The stack of notes 28 will be passed from the guide surfaces 40 between the belt 43 and a belt 44 to the diverting station 6 where it will then pass to the dump cassette 23 between the belts 10, 20. In this way, part of the reject path for the stack of sheets 28 is the same as the reject path for the unsuitable sheets fed from the module 1. One of the rollers 41 is driven via a drive belt 60 from a toothed gear 61. The gear 61 engages a toothed gear 62 non-rotatably connected to one of the rollers 35. The gear 61 is driven by a motor (not shown). Conveniently, the apparatus will be controlled by a conventional microprocessor which is responsive to output signals from the module 1 and to input signals by a user to control the feeding of notes to the stack 28. Although not shown, the apparatus may further comprise means for counting the notes in the stack 28 and if a number of notes is incorrect then the stack may automatically be fed to the dump cassette 23. In addition, as previously mentioned, the stack 28 may be rejected at the command of a user. Each of the belts and the stacking wheels may be driven by a conventional motor (not shown) under the control of the microprocessor. The position of each guide member 13, 36 is also under the control of the microprocessor. Figure 3 illustrates a second example of banknote dispensing apparatus. The drawing is mainly schematic and it should be understood that the feed paths shown can be constructed in practice by using sets of endless belts in a similar way to that shown in Figure 1. In this example, banknotes are fed through a detection module (not shown) similar to the module 1 shown in Figure 1 along a feed path 44′ to a diverting station 6′. The diverting station 6′ includes a guide member 13′ which is operable under the control of a microprocessor to guide the sheets either to stacking wheels 24′ or a dump cassette 23′. The stacking wheels 24′ are rotatable in an anti-clockwise direction. A stripper plate 45 extends between the stacking wheels 24′ and notes carried in the stacking wheels 24′ are stripped off the stacking wheel by the stripper plate 45 to form a stack 48. When the stack is complete, pivoting pinch rollers 46 are pivoted in an anti-clockwise direction to urge the stack of sheets against support belts 47 (shown in phantom in Figure 3). At this point, the stripper plate 45 is pivoted away from the stack 48. A guide member 36′ is then moved to a suitable position for guiding the stack of notes 48 either to a dispense outlet 33′ or to a dump feed path 49. The belts 47 and belts 50 together with other belts (not shown) making up the feed path are then rotated (probably at a speed reduced from that for feeding notes to the stack) and the stack of notes 48 is then fed either to the dispense outlet 33′ or along the feed path 49 to the guide member 13′ which is arranged to direct the stack of notes to the dump cassette 23′. If the stack of notes is fed to the dispense outlet 33′ its final position can be controlled by a photosensor or by measured transport movement.

Claims: 1. Sheet dispensing apparatus comprising first conveying means for dispensing sheets along a feed path to a stacking position; detection means (1) for detecting unsuitable sheets; diverting means (6) comprising a movable guide (13) cooperating with the first conveying means to guide sheets along the first conveying means and movable in response to an output signal from the detection means (1) to divert detected unsuitable sheets along a first reject path (10,20) to a dump (23); and stacking means (24) downstream of the diverting means for stacking sheets at the stacking position for dispensing through a dispense outlet characterised by second conveying means (29) for selectively delivering the stacked sheets from the stacking position to the dispense outlet (33) or along a second reject path to the dump (23); and in that the dispense outlet (33) and the dump (23) are positioned at opposite lateral ends of the apparatus. 2. Apparatus according to claim 1, wherein part of the second reject path (10, 20) is formed by the first reject path. 3. Apparatus according to claim 1 or claim 2, wherein the stacking means comprises a rotatable member (24) having a plurality of radially outwardly extending tines (25) for receiving sheets from the feed path; and stripper means (26) cooperating with the rotatable member (24) for stripping sheets from the rotatable member to form a stack of sheets (28), the stripper means being pivotable from a first position in which sheets are stripped from the rotatable member (24) to a second position (26′) in which the stack of sheets is urged into engagement with the second conveying means (29). 4. Apparatus according to claim 3, wherein the stripper means comprises one or more movable conveyers (26). 5. Apparatus according to any of the preceding claims, further comprising counting means for counting the number of sheets in the stack and for causing the second conveying means to convey the stack of sheets to the dump if the number of sheets in the stack is incorrect. 6. Sheet dispensing apparatus according to any of the preceding claims, wherein further diverting means (36) are provided downstream of the stacking position to divert the stacked sheets either to the dispense outlet (33) or to the dump (23). 7. Apparatus according to any of the preceding claims, wherein the second conveying means comprises an upright portion (29) against at least a part of which sheets are stacked by the stacking means. 8. Banknote dispensing apparatus comprising apparatus according to any of the preceding claims.

Inventors: JENKINS, STUART MCKEWAN, MAYFIELD, ROSS, SPENCER, MICHAEL STANLEY
Applicants: DE LA RUE SYSTEMS LIMITED
Application year: 1985
Main classification: B65H29
IPC codes: B65H29, B65H43, G07D1