Auto-Duplexing ADFs and Print Engines

Printers that can print two-sided pages automatically—and nowadays most but the least expensive can—have been with us for a while. These printers are said to be auto-duplexing, which means they have a device near the end of the paper path that grabs the page and automatically flips it over, so that it can run back through the printing apparatus to print the other side of the page. Not everybody prints two-sided pages, but having the ability to make doing so automatic surely must ensure that a lot more people do, and using half the paper most of the time must be good for just about everybody.

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