Drum machine for the storage of banknotes

1. Machine for the storage of banknotes comprising means for conveying banknotes in non-overlapped sequence along a movement direction from an input of the machine to an internal compartment that comprises a winding drum of a couple of support tapes with the banknotes conveyed to the compartment being interposed between the tapes, between the input of the machine and the winding drum overlapping means being present which receive the banknotes in non-overlapped sequence along said movement direction from the input, accelerate the speed of the banknotes to increase their speed in relation to the speed of the tapes winding on the drum, and send the banknotes partially overlapped along said movement direction towards the drum; and wherein speeding up of the banknotes is performed by a couple of parallel traction rollers between which the banknotes pass, the couple of traction rollers being motorized to vary upon command the speed of the banknotes that flow between them in the sense that the successive banknotes are brought closer.

2. Machine according to claim 1 , characterized in that it comprises means for conveying banknotes in sequence from drum to an output of the machine, between drum and output spacing means being positioned to receive the partially overlapped banknotes from the drum and send them in non-overlapped sequence to the output.

3. Machine according to claim 2 , characterized in that the spacing means accelerate the banknotes to increase their speed in relation to the speed of the tapes being unwound from the drum.

4. Machine according to claim 2 , characterized in that the path between the input and the overlapping means is basically separate from the path between the spacing means and the output.

5. Machine according to claim 2 , characterized in that the spacing means and the overlapping means comprise a couple of parallel traction rollers between which the banknotes pass, the couple of traction rollers being motorized to vary upon command the speed of the banknotes that flow between them in the sense that the successive banknotes are brought closer or further away.

6. Machine according to claim 5 , characterized in that a roller of the couple is motorized and the other is rotated through contact with the first.

7. Machine according to claim 2 , characterized in that the overlapping means and the spacing means are formed by the same device followed in the opposite direction by the banknotes in input or output.

8. Machine according to claim 5 , characterized in that the overlapping means and the spacing means are formed by the same device followed in the opposite direction by the banknotes in input or output and the couple of rollers is coaxial to the return rollers of the tapes between a condition of bringing the surfaces closer towards the drum and a further away condition in relation to the respective feeding and collection reels of the two tapes.

9. Machine according to claim 8 , characterized in that each roller of the couple of traction rollers is divided into two roller segments positioned at the two ends of a corresponding roller of the said return rollers, the return roller having a smaller diameter than the diameter of the two segments of traction roller between which it is inserted so as not to interfere with the banknotes in transit.

10. Machine according to claim 9 , characterized in that the return rollers are mounted idle on the same shaft as the corresponding traction roller.

11. Machine according to claim 1 , characterized in that it comprises a sensor for detecting the passage of banknotes directed towards the overlapping means to control the action of the overlapping means.

12. Machine according to claim 1 , characterized in that the banknotes are moved with the greater dimension transversal to the conveying movement.