Definition: A Reversing Automatic Document Feeder (RADF) is a mechanism that will auktomatically flip over a sheet of paper so that the printer can print on both sides of the paper. A printer can come with an RADF, or one can be added later. A printer equipped with an RADF is said to be a duplexing printer; in other words, it can printed double-sided.
"Reversing Automatic Document Feeder (RADF)"
By Peter Piazza, About.com
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