FIELD OF THE INVENTION
The present invention relates to a new and improved mechanism for use in an automated teller machine which includes a unique cash dispensing mechanism, with a specialized pick mechanism, disposal of single notes which are either soiled, torn or picked in excess of the request prior to bunching of the notes, delivery of the notes after bunching in a unique capsule. The invention also provides for a J bend plate and egg shaped cam rollers to ensure single pick up and unique purge mechanism to remove excess notes. The present invention also provides a cassette with shutter to prevent fraud attempts with respect to the cassettes, a low note count detector, a height adjustment tool for various sized notes and an ink sprayer for destruction of the notes in the event of unauthorized removal.
BACKGROUND OF THE INVENTION
In the operation of an ATM, a customer sends a request to dispense the money using a customer identifying card. The machine will then process the transaction, and dispense cash from one or more currency cassette. Cash Dispensers known from the prior art include a note picking mechanism for extracting notes from associated currency cassettes, a stacking means for accumulating the extracted notes and a transport means for transporting the stacked notes to the exit slot in the ATM.
Generally pick up mechanism are of two types - vacuum pick mechanism and friction based picking. These known pick mechanisms face a problem known as multiple picking i.e more than one note is picked at a time from the cassette. Multiple picking of notes causes detrimental performance in ATM cash dispensers.
Many mechanisms have been adopted to ensure only single note is picked. One method is the use of the thickness measurement device called Linear Variable Differential Transducer (LVDT), which is capable of finding a thickness of a single note. It can also be used to find the height of the note (which is fixed for INK). If two notes come one on top of the other or they come one behind the other without proper spacing then t hese notes are diverted to Purge bin. H owever this mechanism has a certain disadvantage, the bad notes which are rejected would be bunched with the remaining notes already taken and the whole lot is purged. This leads to quick overflow of the purge bin as the entire lot of notes after bunching is dropped into the purge bin. It also affects the

utilization of the dispenser since the transaction has to be redone.
The invention seeks to provide an improved mechanism to pick only single notes and even in the event that more notes are picked, then there is a feature of stacking them on the J Bend and releasing the extra notes on the next request, thus preventing multiple picking and also aims at mitigating one or more of the problems mentioned above.
PRIOR ART: US 5597996 A titled "Cash dispensing apparatus (ATM) and method for separating rejected bank notes" relates to a cash dispensing apparatus having a purge bin into which bank notes may be deposited as a result of an irregularity in the picking or transportation of the notes or as a result of a user failing to remove all of the notes. The invention is characterized by depositing a separating sheet in the purge bin subsequent to each purge operation for the purpose of separating the bank note or notes deposited in the purge bin in one purge operation from the note or notes deposited in the purge bin in the next purge operation.
US 6196457 Bl titled "Sheet Dispensing Mechanism" provides for a cash dispensing mechanism of an automated teller machine (ATM) includes a safe inside which are housed first and second units. The first unit includes currency cassettes and an associated pick mechanism. Bills are transported from the pick mechanism to a bill validator included in the first unit. If a bill is rejected then a divert gate directs it into a purge bin also included in the first unit. The second unit is mounted on the first unit with a selected orientation relative to said first unit dependent on whether the cash dispensing mechanism has a front loading or a rear loading configuration. Bills accepted by the validator are transported upwardly out of the first unit and into the second unit via a single transfer station, regardless of whether the cash dispensing mechanism has a front or rear loading configuration. The second unit stacks bills received from the first unit into a bunch and transports the bunch to a bill dispensing port of the safe.
SUMMARY OF THE INVENTION
The present invention aims at providing an improved mechanism for dispensing cash and preventing multiple picking of notes.
One of the main features of the invention is an unique a J-bend plate placed in the picking point to which the cassette gets attached as it is ramped down the trail and special egg shaped cam rollers positioned in the picking shaft and coated with a special rubber material to provide

stickiness to the surface. The shapes of the J bend plate and the cam rollers result in the cam rollers applying only single point pressure, instead of applying pressure all over the surface of the note, ensuring that only one note is pushed towards the feed rollers. In the event that more than one note gets picked, the extra note gets deposited on the J Bend plate and is released only in subsequent requirement/transactions of the same denomination. This is the first level of filter for extra notes.
Furthermore, there is a unique cassette shutter assembly comprising of an elongated shutter attached to a rear end of the cassette via springs and a pair of sliding plates attached to respective side plates of the dispenser slot. The shutter includes a pair of protruding pins arranged at bottom ends of the shutter, facing an inclined surface of the corresponding sliding plate. During the cassette insertion into the CDM, the protruding pins ramp up along the inclined surface of the sliding plates to place the shutter in an open position. Whereas, during the cassette removal from the CDM, the protruding pins ramp down the inclined surface of the sliding plate to place the shutter in a close position. Thus prevents fraud attempts with respect to the cassettes.
The present invention also provides for a note positionadjustment tool so as to make the cassette suitable for stacking notes of different heights/widths of desired denominations based on the requirements.
The novelty of the invention lies in purging only the bad/excess notes. The single note diversion is yet another important feature of this invention and increases the system utilization value and also speeds up the transaction time on a failure case as the bad/extra note is identified prior to bunching and the same is diverted prior to bunching as against the traditional method of the scrutinizing the notes prior to disposal. The rejection after the notes are bunched fill up the purge bin and the transaction is once again restarted. The single note which is either defective or is in excess is diverted and the microcontroller is programmed to replace the diverted note within seconds. The entire transaction is also completed in an efficient manner and the single note rejection saves time and space in the purge bin. This feature also substantially prevents the quick overflow of the purge bin.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 provides for a perspective diagram of the present invention.
Figure 2a provides schematic diagram illustrating operation of the present invention.

Figure 2b provides flowchart illustrating operation of the present invention.
Figure 3 provides a perspective diagram of the pick assembly.
Figure 4a and 4b provides perspective diagram of the single note divert assembly in the normal and diverting positions, respectively.
Figure 5a-5c provides details explanation of the egg shaped cam rollers.
Figure 6 provides a perspective diagram of the cassette shutter assembly.
Figure 7a & 7b provides a perspective diagram of a note position adjustment tool comprising height and length adjustment features, respectively.
DETAILED DESCRIPTION OF THE DRAWINGS
Figure 1:
The present invention, CDM (1) comprises a secure casing enclosing a pick geometry (2) and a presenter (3). The pick geometry (2) comprises a pair of cassettes (4) for stacking about 2800 to 3000 bank notes depending on the versions, where cassettes count can be increased in multiples of 2 based on the requirements. The note alignment can be changed using a note position adjustment tool depending on the denomination so as to make the cassette suitable for stacking other country currencies, some of which are broader than the Indian Rupee.
A pick assembly (5) of the pick geometry picks the note from the corresponding cassettes and moves the note towards a cash dispensing slot via a transport mechanism (6). A LVDT (linear position/displacement transducer) (7) provided in the transport path detects the bad notes traversing in the transport path. Upon detecting the bad note in the transport path, a single note divert (9) diverts the bad notes at rear (distal) end of the purge bin (8) while allowing the good notes towards a bunching mechanism (10). The bunching mechanism bunches the notes until it reaches a predefined count and then moves the note bunch towards the dispensing slot via a presenter exit divert (11). In the event of failure to withdraw the money after the transaction is processed, the bunched notes corresponding to the total value of the transaction is diverted and deposited at the front (proximal) end of the purge bin.

Figures: 2a and 2b
Is the flow chart explaining the various steps of the operating mechanism of the present invention. When a customer sends a request to dispense the money, the bank notes are picked (12) from the corresponding cassettes based on a unique identification of each cassette. Then, the notes are transported via timing belts of the transport mechanism of the presenter, where a LVDT of the transport mechanism detects (13) parameters such as thickness, fold, etc., of the note traversing in the transport path. When the note parameter is deviated from the predefined parameter, the defected note is then pushed (14) into the common purge bin via the single note divert, while allowing the good notes to be transported towards the bunching mechanism. The good notes are bunched (15) in the bunching mechanism and are finally exited through a shutter of the machine and presented to the customer in a cascading format. If the notes exited (16) through the shutter remains in the dispensing slot for more than predefined time, then the notes bunched are retracted back and diverted into the same purge bin from the other end i.e the proximal end.
Figure: 3: Pick Assembly
The pick assembly comprises a J bend plate (19), a pick motor (17) to rotate a pair of special egg shaped cam rollers (20) positioned in a cam shaft (21), via the gear assembly (18), where the cam rollers (20) are coated with a special rubber material for e.g. polyurethane to provide stickiness to the surface. The J-bend plate (19) is positioned such that the cassette gets attached as it is ramped down to it. As the notes get pushed towards the egg shaped Cam rollers, the notes travel via the J Bend plate the spacing is limited to a single note. The extra note if any, that is pushed is retained in the J Bend plate and is only delivered in subsequent transactions. Thus the J Bend which has sufficient space for a single note only ensures that only one note is pushed towards the egg shaped Cam rollers and if two notes are picked, only one note is passed on and the second note is retained in the J Bend plate itself till subsequent transactions. The egg shape of the Cam rollers, results in the roller applying pressure on a defined place instead of applying pressure all over the surface of the note. Due to single point pressure, only a single note is picked. There are two pairs of feed rollers (23), made of rubber, placed immediately after the egg shaped cam rollers. Both are placed one on top of the other, such that they touch each other, ensuring that the note which is picked is transported without any jamming of the system. The pick assembly ensures that only a single note is pushed, if more than one note is picked, it is parked in the J Bend plate till the next rotation of the egg shaped Cam

rollers for dispensing another note of the same denomination. In the event that transaction is completed, and no further note of the same denomination is required for that particular transaction, then the note is retained in the J Bend plate till the next requirement. The egg shaped rollers ensure furthermore, due to pointed pressure only one note is picked and the feed rollers ensure delivery without any jamming. Figures: 4a and 4b Single note divert
The LVDT (24) provided in the transport path is located in presenter after the pick assembly and detects the irregular note parameters such as double note, folded note, soiled note, torn note etc., during note transport from the pick assembly to the exit slot. When the LVDT (24) detects an irregular/bad or a double note, a solenoid trigger attached to the presenter moves the single note divert (7) from its normal position into a diverting position, where the irregular/bad/extra note is diverted into the rear (distal) end of the purge bin. These actions are performed within a few seconds and, immediately the single note divert (7) retracts to its normal position and a communication to the microcontroller is sent to replace the diverted note and the same is generated. The bunching mechanism of the presenter presents all the good notes in a bunched manner for disposal.
The figures 5a-5c; provide detailed explanation of dimensions of the egg shaped cam roller.
The cam roller comprises inner and outer coverings arranged coaxially at an intermediate gap of 4mm. Overall width of the cam roller is 24mm. The outer covering of the cam roller is made of polyurethane.
Figure 6: Cassette shutter assembly
A unique cassette shutter assembly comprises an elongated shutter (25) attached to a rear end of the cassette via springs and a pair of sliding plates (27) attached to respective side plates of the dispensing slot. The shutter includes a pair of protruding pins (26) arranged at bottom ends of the shutter, facing an inclined surface of the corresponding sliding plate. During the cassette insertion into the CDM, the protruding pins ramp up along the inclined surface of the sliding plates to place the shutter in an open position. Whereas, during the cassette removal from the CDM, the protruding pins ramp down the inclined surface of the sliding plate to place the shutter in a close position. Thus prevents fraud attempts with respect to the cassettes.
Figure 7a & 7b Note position adjustment tool

A note position adjustment tool comprises a top cover (29) with ribs (30) arranged towards a bottom plate of the cassette, where a gap between the ribs and the bottom plate of the cassette are adjustable so as to make the cassette suitable for stacking notes of different heights based on the requirements. Also, the note position adjustment tool comprises a support assembly with a pair of support arms (31) arranged horizontally at the bottom plate of the cassette and are controlled via gears, and a link plate (33) adjustably connecting the support arms at predetermined distance. A clip (32) releases the gears of the support assembly to adjust a distance between the support arms to position the notes of desired denominations.
DETAILED DESCRIPTION OF THE INVENTION
The present invention, CDM (1) comprises a microcontroller to control operations of the CDM based on the user command, and a secure casing enclosing a pick geometry (2) and a presenter (3). The pick geometry (2) comprises a pair of cassettes (4), where about 2800 to 3000 bank notes are stacked in each cassette depending on the versions. The present invention also provides for a note position adjustment tool comprises a top cover (29) with ribs (30) arranged towards a bottom plate of the cassette, where a gap between the ribs and the bottom plate of the cassette are adjustable so as to make the cassette suitable for stacking notes of different heights based on the requirements. Also, the note position adjustment tool comprises a support assembly with a pair of support arms (31) arranged horizontally at the bottom plate of the cassette and are controlled via gears, and a link plate (33) adjustably connecting the support arms at predetermined distance. A clip (32) releases the gears of the support assembly to adjust a distance between the support arms to position the notes of desired denominations.
An additional feature is also provided by placing an ink sprayer on the top of the cassette on the higher end versions that sprays the ink onto the currency if an unauthorized removal of the cassette is identified, thus rendering the note useless.
In order to determine the number of notes reaching a preset low note count in the cassette a small magnet is placed which moves towards the CAM roller as the notes get picked. At a close position a magnetic switch is placed to sense it. This tells the microcontroller that the notes in the cassette are approaching the low note count level in the cassette. Yet another option is the by means of a potentiometer. On the side of the electro-mechanical cassettes there is a potentiometer fixed to a plate which holds the cash. As the notes decreases the plate moves towards the end of the cassette i.e the proximal end, changing the resistance value and

thus the microcontroller recognizes the decrease in the number of notes. Once 100 or 50 notes remain an alarm can be raised to the bank saying that there is a low note count in the particular cassette.
When a customer sends a request to dispense the money, the bank notes are picked from the corresponding cassettes based on a unique identification of each cassette. Then, the notes are transported via timing belt in the transport mechanism of the presenter, where a LVDT of the transport mechanism detects (13) parameters such as thickness, fold, etc., of the note traversing in the transport path. When the note thickness is deviated from the predefined thickness, the defected notes are then pushed (14) into a purge bin via a single note divert. The diverted note is replaced and the normal notes transported through the transport path are bunched (15) in a bunching mechanism. The notes are finally exited through a shutter of the machine and presented to the customer in a bunched manner. If the notes existed through the shutter remains in the dispensing slot for more than predefined time, then the note bunch are retracted back and diverted into the same purge bin from the other end.
The cassettes comprises three holes in the front panel and three switches placed outside the cassette, the said holes being covered by using a plastic stud to create combinations depending on the on/off position of the switch permitting a maximum of eight combinations with a usability of only 6 combinations to ensure placing of unique cassette into the respective slot.
Purge bin is a small box that collects the bad notes/extra notes which would either be a secured box that is locked or just a metal tray to collect the purged notes. The purge bin is positioned such that the single note divert faces a rear (distal) end of the purge bin and the presenter note divert faces a front (proximal) end of the purge bin, which ensures that purging of single note and note bunches retracted from the dispensing slot in the common purge bin without any additional retraction purge bin.
One of the main features of the invention is an unique a J-bend plate (19) placed in the PICK to which the cassette gets attached as it is ramped down the trail, and special egg shaped cam rollers (20) positioned in the picking shaft (21) and coated with a special rubber material to provide stickiness to the surface. The shapes of the J bend plate and the cam rollers result in the cam rollers applying only single point pressure, instead of applying pressure all over the surface of the note, ensuring that only one note is pushed towards two pair of feed rollers (23) made of rubbers, kept immediately after the cam rollers, ensuring the smooth travel of the picked notes

without any jamming. In the event that more than one note gets picked, the extra note gets deposited on the J Bend plate which has spacing for only note and this deposited note is released only in subsequent requirement/transactions of the same denomination. This is the first level of filter for extra notes.
Yet another feature of this invention is a unique cassette shutter assembly comprising of an elongated shutter (25) attached to a rear end of the cassette via springs and a pair of sliding plates (27) attached to respective side plates of the dispensing slot. The shutter includes a pair of protruding pins (26) arranged at bottom ends of the shutter, facing an inclined surface of the corresponding sliding plate (27). During the cassette insertion into the CDM, the protruding pins ramp up along the inclined surface of the sliding plates to place the shutter in an open position. Whereas, during the cassette removal from the CDM, the protruding pins ramp down the inclined surface of the sliding plate to place the shutter in a close position. Thus prevents fraud attempts with respect to the cassettes.
Another important feature of this invention is the concept of a single note divert where the soiled/torn/extra notes are diverted to the purge bin without sending them to the bunching mechanism. Normally, as there is no single note divert assembly, the examined faulty notes are also bunched along with the previously bunched notes and the entire bunch is then purged using the presenter exit divert.
The present invention aims at purging only the bad notes and not the entire bunch to ensure that the invention comprises the LVDT to detect the parameters such as double note, folded note, etc., during note transport from the pick assembly to the exit slot. When the LVDT (25) detects a bad note, a solenoid of the single note divert moves the former from its normal position (24) into a diverting position (26), where the bad note is diverted into the common purge bin. These actions are performed within a few seconds, immediately the single note divert retracts to its normal position (24) and the micro controller process a fresh note to replace to purged note. The good notes are bunched in the bunching mechanism and are ready for disposal.
Thus the system purges only the bad/extra notes and not the entire bunch as the single note diverter is located in the transport path and not after bunching of notes as in the present day models. This increases the system utilization value and also speeds up the transaction time on a failure case. It also ensures that the purge bin does not need to be replaced for a substantial

period of time in comparison to the current requirements for replacement.
The present invention comprises of a Cassette, J Bend, Cam Rollers, Single note divert all made of plastic preferably Delrim and the timing belt made of Rubber 3m HTD type and the outer sticky covering of the cam rollers made of polyurethane. Although embodiments of this invention have been shown and described, it is to be understood that various modifications and substitutions, as well as rearrangements of parts and components can be made by those skilled in the art without departing from the novel spirit and scope of the invention.

We claim:
1. A cash dispensing module comprising a microcontroller to control operations of the CDM based on the user command; cassettes; a pick geometry and a presenter;
the cassettes comprising of three holes in the front panel and three switches placed outside the cassette, the said holes being covered by using different coloured plastic studs to create combinations depending on the on/off position of the switch permitting a maximum of eight combinations with a usability of only 6 combinations to ensure placing of unique cassette into the respective slots;
the said cassettes having a capacity ranging between 2800 to 3000 notes;
the said cassettes comprising of an ink sprayer located on top of the cassette to spray ink on the notes in the event of unauthorized user of cassette recognized by the microcontroller;
the said cassettes comprising a unique cassette shutter assembly comprising an elongated shutter attached to a rear end of the cassette via springs and a pair of sliding plates attached to respective side plates of the dispensing slot; the shutter includes a pair of protruding pins arranged at bottom ends of the shutter, facing an inclined surface of the corresponding sliding plate.; the said protruding pins ramping up along the inclined surface of the sliding plates to place the shutter in an open position when the cassette in inserted into the CDM; the protruding pins ramp down the inclined surface of the sliding plate to place the shutter in a close position, when the cassette is withdrawn from the CDM, thus preventing fraudulent attempts to remove cash from the dispensing slot;
the said cassettes comprising a note position adjustment tool comprising a top cover with ribs arranged towards a bottom plate of the cassette in such a manner the gap between the ribs and the bottom plate of the cassette are adjustable so as to enable stacking notes of different heights;
the note position adjustment tool further comprises a support assembly with a pair of support arms arranged horizontally at the bottom plate of the cassette which are

controlled via gears, and a link plate adjustably connecting the support arms at predetermined distance; a clip releases the gears of the support assembly to adjust a distance between the support arms to position the notes; providing unique length adjustment features enabling the same cassettes reusable for various currencies;
the pick geometry comprising a pick assembly per cassette, the said pick assembly further comprises a J bend plate, a pick motor to rotate a pair of special egg shaped cam rollers positioned in a cam shaft, via the gear assembly where the cam rollers are coated with a special rubber material to provide friction; the egg shape of the Cam rollers applying pressure on a defined place resulting in a single note pick;
the a J-bend plate being positioned such that the cassette is attached as it is ramped down; the pushed notes from the cassette towards the egg shaped cam rollers passing through the J Bend plate; the spacing in the J Bend plate being limited to a single note; the extra note if any, retained in the J Bend plate, delivered in subsequent cam roller rotation;
the two pairs of rubber feed rollers located immediately after the egg shaped cam rollers, one on top of the other in such a manner that they touch each other; ensuring that the note which is picked is transported without any jamming of the system;
the said pick assembly ensuring that only a single note is picked for each rotation of the cam rollers;
the presenter comprising a single note divert; bunching mechanism connected through timing belts of a transport mechanism;
the single note divert located in the transport path immediately after the pick assembly, comprising of an irregularity note detector communicating to the micro controller; the said micro controller activating the solenoid of the single note divert to move the divert from normal to divert position and reverting to the normal position once the note is purged in the purge bin;
the micro controller issuing a replace command in respect of the purged note; the said note being replaced within seconds;
the bunching mechanism of the presenter presents all the good notes in a bunched manner for disposal;

the microcontroller intimated of pre-set low count of notes by means of a magnetic switch located at the distal end of the cassette triggered by means of a small magnet located on the note supporting plate fixed to cassette travelling a pre-set distance towards the egg shaped cam roller as the notes get picked;
the said cash dispensing mechanism leading to faster transactions due to single note divert prior to bunching of notes for dispensing; the said single note divert prior to bunching resulting directly in saving space in purge bin; extending the time duration for the filling up of the purge bin;
all the aforementioned features leading to a faster, more efficient and more economical CDM.
2. The pre-set low count of notes as claimed in claim 1 is determined by the micro controller when the resistant value of the potentiometer fixed to a plate in the cassette decreases as the notes get dispensed and the space between note support plate and distal wall of the cassette reaches the pre-set threshold level.
3. The Cassette, J Bend plate, Cam Rollers, Single note divert as claimed in Claim 1 made of Delrim.
4. The timing belts as claimed in Claim 1 made of Rubber 3m HTD type,