Duplex scanning
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Duplex scanning is a feature of computer scanners and MFPs that allows the automatic scanning of a sheet of paper on both sides. Devices without this capability can only scan a single side of a sheet of paper at a time.
In general, duplex scanning is achieved on MFPs using a Reversing Automatic Document Feeder (RADF).
On MFPs, it is common to find duplex scanning on devices that also have duplex printing capabilities.