Patent ID: 7802786

Claim:
A duplex document scanning method comprising the steps of: (a) moving a document along a first path to pass through a scanning module so as to perform a scanning operation on a first side surface of the document; (b) moving the document along a second path into a first reversing roller unit; (c) driving the first reversing roller unit to reverse and move the document from the first reversing roller unit onto the first path via a third path to thereby pass again through the scanning module so as to perform a scanning operation on a second side surface of the document opposite to the first side surface; (d) moving the document along a fourth path into a second reversing roller unit; and (e) driving the second reversing roller unit to reverse and move the document from the second reversing roller unit into the first reversing roller unit via a portion of the fourth path, an ejecting path, and a portion of the second path, to thereby drop onto an ejecting tray.