Patent ID: 7557968

Claim:
A document feeder for transporting a document to a predetermined reading position at which image reading is performed by an image reading portion, comprising: a sensor disposed between a document stacking portion and the predetermined reading position for detecting a leading edge of a document fed from the document stacking portion toward the predetermined reading position; a document transport portion for transporting the document to a reading standby position upstream of the reading position based on a detection result of the sensor; and a control portion for controlling the document transport portion so that: the document is made to stop at the reading standby position if the control portion does not receive a signal representing that the image reading portion is in an image readable state from a detecting portion for detecting that the image reading portion is in an image readable state by the time the document arrives at the reading standby position after a transport of the document is started by the document transport portion; and the document is transported to the reading position, without being made to stop at the reading standby position, if the control portion receives the signal from the detecting portion by the time the document arrives at the reading standby position after a transport of the document is started by the document transport portion.