| 摘要 |
A document feed mechanism includes a feed wheel (12) and a cooperating idler wheel (14) which is movable between active and inactive positions. The idler wheel (14) is rotatably mounted on one end (88-3) of an arm (88) which passes through an elongated slot formed in support means (42,86) for a document track (28), the slot extending perpendicularly to the document track (28) and a pivot portion (88-1) of the arm (88) being slidably movable along the slot. A compression spring (74) biases the idler wheel (14) towards its inactive position with the arm (88) pivoting about a region of contact between the pivot portion (88-1) of the arm (88) and a closed end of the slot. A solenoid (60), when energized, moves the idler wheel (14) towards its active position against the bias of the compression spring (74), with the arm (88) pivoting about said region of contact. Documents of different thicknesses can be handled by the mechanism by virtue of the arm (88) being slidable along the slot. |
