Patent ID: 7040618

Claim:
A stacker for bank notes comprising a feeding device for depositing the bank notes in a storage pocket with variable capacity, the storage pocket having a contact surface against which the bank notes deposited in the storage pocket lie with one edge, and a storage tray on which the bank notes are stacked in the storage pocket flat and parallel to the storage tray, and the storage tray of the storage pocket being mounted movably for changing the capacity of the storage pocket, wherein the storage pocket is disposed with contact surface at an angle to the horizontal so that the bank notes stacked in the storage pocket lie with their edges against the contact surface and the resulting frictional force between the edges of the bank notes and the contact surface substantially compensates the slope descending force acting on the stack formed of bank notes in the direction of the storage tray, and the feeding device exerts a force on the stack when depositing a bank note at least as of a certain stack thickness, thereby moving the storage tray so as to enlarge the capacity of the storage pocket, and the angle between the contact surface and the horizontal is between 20° and 30°; wherein the storage tray is urged by means of a spring element into a starting position defined as a position closest to the feeding device; wherein the spring element includes an extension spring that is bent between the displaceable storage tray and a fixed point of support, while being deflected via deflection elements; wherein when the storage tray is in the starting position, the spring element has a length longer than a maximum range of displacement of the storage tray.