| 摘要 |
A multiple document detector set having a driven wheel and an opposed idler wheel for gripping documents in a pinch created there-between. The idler wheel (44) is provided with a slipping clutch (62) for creating a rotation opposing torque. The idler wheel (44) and the driven wheel (42) each have a coefficient of friction against documents greater than the coefficient of friction of documents against one another. When multiple documents are introduced into the nip (46) one document (32) is held by the idler wheel (44) and the other document (34) is driven by the driven wheel (42). A monitor (18) detects whether or not the driven wheel (42) has the same periphral velocity as the idler wheel (44) and signals the presence of multiple documents if the peripheral velocities are not the same. The monitor (18) signals completion of separation of multiple documents when the peripheral velocites once again become the same. Tandom provision of multiple document detectors sets (10) along the length of a track (12) insures that large numbers of documents (32,34) simultaneously presented in the track (12) can be separated. The multiple document detector sets (10) are provided as the prime or even sole motive force for documents (34,32) along the track (12). |
