Patent ID: 7558523

Claim:
An automatic document feeder for single-side and duplex scanning, said automatic document feeder comprising: a scanning module for scanning one or more documents face up in a scan region; a sheet feeding tray disposed at a first side of said scanning module for placing therein said one or more documents to be scanned face up in an original document order; a first discharging tray disposed above said sheet feeding tray for supporting said one or more documents scanned according to single-side scanning; a second discharging tray disposed at a second side of said scanning module for supporting therein said one or more documents scanned according to duplex scanning; a first path arranged between said sheet feeding tray and said scan region; a second path arranged between said scan region and said first discharging tray; a third path arranged between said first discharging tray and said second discharging tray and passing through said scan region; a pickup roller assembly for transporting said one or more documents into said first path; a first discharging roller assembly for transporting said one or more documents into said third path or said first discharging tray; and a second discharging roller assembly for transporting said one or more documents into said second path or said second discharging tray.