Abstract: A document handling apparatus is disclosed which is particularly well adapted for counting documents of value, such as banknotes. The document handling apparatus comprises an input module for receiving a stack of documents and feeding them one by one into the apparatus, a detector box which houses a series of detectors for detecting characteristics of the documents, a transport system for conveying documents within the apparatus, a doubles detector for sensing the passage of each document therethrough and a stacker module for stacking the output documents and presenting them to the user. The apparatus is based on a metal framework in a plastics housing.

Abstract: Apparatus for sensing the passage of sheets (1) through a nip formed by rollers (5 and 6), includes a core (14), moving with the shaft of one of the rollers, and a flat coil (15) connected to an oscillator circuit for sensing the deflection of one roller relative to the other. The oscillator circuit (18) provides a train of signals the frequency of which varies with the amount of the relative deflection of the rollers, and a counter (19) counts the signals from the oscillator in a fixed time interval. A store (22) stores counts representing the relative deflections of the rollers in a cycle of movement of the rollers when no sheet is present. The difference between a subsequent count and a stored count for a corresponding position in the cycle of rotation of the rollers is compared with a predetermined threshold, to establish the presence or absence of a sheet between the rollers.

Abstract: Apparatus for sensing the passage of sheets (1) through a nip formed by rollers (5 and 6), includes means for sensing the deflection of one roller relative to the other, the sensing means including an oscillator (18) providing a train of signals the frequency of which varies with the amount of the relative deflection of the rollers, and a counter (19) counting the signals from the oscillator in a fixed time interval. Means (23) are provided for storing counts representing the relative deflections of the rollers in a cycle of movement of the rollers when no sheet is present, and for comparing the difference between a subsequent count and a stored count for a corresponding position in the cycle of rotation of the rollers, with a predetermined threshold, to establish the presence or absence of a sheet between the guide members. The sensing means may comprise a core (14), moving with the shaft of one of the rollers, and a solenoid (15) connected to the oscillator circuit.