Automatic Document Feeder

This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (January 2008)

A scanner with Duplexing Automatic Document Feeder.

In multifunction or all-in-one printers, fax machines, photocopiers and scanners, an automatic document feeder or ADF is a feature which takes several pages and feeds the paper one page at a time into a scanner or copier^[1], allowing the user to scan, and thereby copy, print, or fax, multiple-page documents without having to manually replace each page. On most copiers, you have a choice of scanning on the flatbed or platen (the "glass") or through a document feeder. The vast majority of fax machines have an ADF, allowing the unattended sending of multi-page faxes. Due to the ubiquity of ADF in fax machines, some fax machine owners use the fax machine as a scanner, faxing multi-page documents to themselves. Document feeders are described by speed, in pages per minute or ppm, and capacity, usually in a range from 10 sheets to 200.

There are two kinds of document feeders capable of two-sided (duplex) scanning: a reversing automatic document feeder or RADF scans one side of a page, then flips it and scans the other side. A duplexing automatic document feeder or DADF scans both sides in one pass. The advantage of the DADF is faster speed for two-sided originals. RADFs and DADFs are rated in images per minute (IPM), the number of sides they can scan each minute.

If your ADF scanner has problems transporting the paper, clean the rubber rolls and pads with 50% of 100% C2H5OH and 80% CH3COOH. Once. It will help for one year. C2H5OH cleans the rubber, CH3COOH makes the rubber soft & grip again.

References

See also

• Duplex printing

This computer hardware-related article is a stub. You can help Wikipedia by expanding it. v • d