Document handler

DETAILED DESCRIPTION The present invention solves this problem by providing that the mass of the assembly comprising the shutter and its actuating components (and other components which can move with the shutter) is distributed such that there is no turning movement or couple about the axis around which the shutter pivots.
In one embodiment, this is achieved by providing that the center of mass of the shutter and other components associated therewith lies on the axis about which it pivots.
In another embodiment, other components which move with the shutter are pivoted about a further axis, and the mass of the system is so distributed that there is no couple about either axis.
The invention is employed particularly where the shutter, together with its associated actuating components, does not consist of a single rotationally symmetrical component of homogeneous mass mounted concentrically; for example, where it consists of a rotationally symmetrical shutter with an associated actuating arm extending away from the axis thereof, or where (as is the case, for example, in note diverter plates or outlet shutters) the shutter itself is not rotationally symmetrical.
In a simple embodiment, the shutter may comprise an outlet shutter consisting of a plate-like flap pivoting around an axis, with a counterweight positioned on the other side of the axis thereto.
In another aspect, the present invention provides a pivotable shutter which is rotationally symmetrical about a pivoting axis, which carries projecting and/or recessed portions to engage with corresponding recessed and/or projecting portions in the surround to the shutter, to prevent a document from passing between the surround and the shutter.
This advantageously prevents jams in the region of the shutter, and attempts to defraud the apparatus.
In a particular form of embodiment of the invention, means are provided to modify the angular position of the shutter in response to the action of one or more systems for detecting the presence of paper