An automatic document transfer device or feeder for double-sided reading of a document is provided. An automatic document feeder includes an input tray configured to receive a document, an output tray positioned either above or below the input tray, transfer elements for transferring a document from the input tray to the output tray, an input transfer path configured to guide a document during transfer from the input tray passed a scanning point to an end point positioned above the input tray, and an output transfer path configured to guide the document during transfer from the end point passed the scanning point to the output tray. The document feeder may include an intermediate path configured to guide the document during transfer from the end point passed the scanning point to the end point again. |