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Automatic Document Feeder (ADF)

Last updated: November 8, 2012

What Does Automatic Document Feeder (ADF) Mean?

An automatic document feeder (ADF) is a feature in printers, photocopiers, fax machines or scanners wherein a stack of paper put into the machine and is then automatically fed through it, allowing the user to print, scan or copy without having to manually place each page into the machine.


Techopedia Explains Automatic Document Feeder (ADF)

There are two kinds of ADFs that are capable of duplex scanning:

  • Reverse automatic document feeders (RADF) scan one side of the page then flip the paper over so that the other side can be scanned.
  • Duplexing automatic document feeders (DADF) scan both sides of the page in a single pass.

An ADF is a standard feature for most printers, fax machines and large photocopiers, but scanners typically lack ADFs, although they may have them as an add-on feature. Flatbed scanners are designed without ADFs.


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