Patent ID: 8102578

Claim:
An image scanning apparatus comprising: a feeder on which printed media are stacked; a pick-up roller to pick up each printed medium from the feeder to be guided along a first moving path; a scanning unit to scan an image on the printed medium; discharge rollers to discharge the printed medium after the printed medium has been scanned via a discharge tray; transportation rollers to transport the printed medium between the pick-up roller and the scanning unit; a reversal tray located between the discharge tray and the feeder, on which the printed medium is temporarily stacked; and a reverse roller installed before the reversal tray at a junction between the reversal tray and an end of a second moving path, which is rotatable in both clockwise and anti-clockwise directions by power transmitted via one of the discharge rollers in order to guide the printed medium towards and away from the reversal tray along the second moving path, wherein the feeder, the pick-up roller, the scanning unit, the discharge tray, and the transport rollers are installed along the first moving path in order to scan images on one side of the printed medium, and the reversal tray and the reverse roller are installed along the second moving path in order to scan images from the other side of the printed medium, and wherein an upper one of the discharge rollers contacts the reverse roller to drive the reverse roller.