METHOD OF COUNTING SECURITY DOCUMENTS

摘要

A method of counting plastic sheets and security documents such as banknotes, each sheet or security document (1) including a sheet like substrate (2) of plastics material, the method comprising the steps of: (a) projecting radiation from a radiation source onto each sheet or substrate for propagation therein, (b) detecting a radiation emission from each sheet or substrate, the radiation emission resulting from the propagated radiation, and (c) counting the number of radiation emissions detected in step (b).