Patent ID: 7296790

Claim:
An automatic document feeding apparatus comprising: a shaft; an ADF roller which feeds documents sheet by sheet by cooperating with separating means, the ADF roller being mounted on the shaft such that the ADF roller can rotate by receiving a torque only in a first direction from the shaft; power switching means which selectively connects driving means with the shaft, the power switching means being installed on the shaft; a pickup roller which picks up the documents stacked in a feeding base by receiving the torque only in the first direction from the shaft; a bracket rotatably mounted on the shaft, the pickup roller being installed on the bracket; clutching means which transmits the torque of the shaft to the bracket when the shaft rotates in the first direction and does not transmit the torque of the shaft to the bracket when the shaft rotates in a second direction; and an elastic member which biases the bracket in the second direction.