Computers, Laptops & Tablets Accessories & Hardware 20 20 people found this article helpful Printers With Auto-Duplexing ADFs Print, scan, copy, and fax two-sided documents automatically by William Harrel Writer William Harrel is a former Lifewire writer and a computer technology editor, writer, author, and instructor with over 30 years' experience. our editorial process Facebook Twitter William Harrel Updated on May 29, 2020 Accessories & Hardware Printers & Scanners Guide To Buying a New Printer The Quick Guide to Webcams Keyboards & Mice Monitors Cards HDD & SSD Raspberry Pi Tweet Share Email An auto-duplexing printer automatically prints on both sides of your paper. Many all-in-one printers (AIOs) have an auto-duplexing feature along with an automatic document feeder (ADF), so multiple pages are fed into the printer at the same time. Here's what you need to know about printers with auto-duplexing ADFs. Auto-duplexing and ADF features are found in multifunction printers as well as stand-alone copiers, scanners, and fax machines. Two Kinds of ADFs That Support Double-Sided Printing ADFs are included with many types of printers and AIOs. They come in several different sizes, accommodating between 15 and 25 pages to 35 or 50 pages and more. There are two kinds of automatic document feeders that support double-sided printing. A reversing automatic document feeder (RADF) scans one side of a page, and then flips the page over and scans the other side. This happens automatically, without the user having to participate. A duplexing automatic document feeder (DADF) can scan both sides of a page automatically in one pass, so DADFs are faster when you're printing two-sided documents. DADFs also can cope better with thicker paper. Both RADFs and DADFs are rated by the number of sides they can scan in a minute. This measurement is called "images per minute" (IPM). The IPM varies depending on the resolution you're using. Examples of AIOs With Auto-Duplexing and an ADF If you have an all-in-one printer with auto-duplexing and an ADF, you can quickly print, scan, copy, or fax double-sided documents without flipping the pages and manually feeding them, which is a great timesaver. There's a wide range of printers that accommodate two-sided printing with automatic document feeding. Here are a few top-rated models. Brother MFCL2750DW All-in-One This Brother all-in-one duplex laser printer features 50-sheet automatic document feeding with a 36-page-per-minute print speed and a 250-sheet adjustable document tray that supports duplex copying, printing, scanning, and faxing. It retails for around $250 and offers an array of connectivity options, including Wi-Fi and Ethernet. Canon Office and Business MB5120 This Canon all-in-one printer, copier, scanner, and fax offers auto-duplex printing and scanning in a small, compact design with a 250-sheet paper tray. This unit is designed for heavy-duty use and has power-saving features, as well. It retails for around $400. A similar model, the Canon Office and Business MB5420 Wireless All-in-One Duplex Printer, boosts capacity with a 500-sheet paper tray. Brother Compact Monochrome MFCL2750DWXL This Brother multifunction laser printer is a compact printer, scanner, copier, and fax machine that offers duplex printing, single-pass duplex copying, and multi-page copying and scanning. Its printing speed is 36 pages per minute with a 250-sheet paper tray and a 50-sheet automatic document feeder, as well as a manual feed slot and touchscreen controls. It retails for around $350.