Duplex scanning is a feature of some computer scanners, and multifunction printers (MFPs) that support duplex printing. A duplex scanner can automatically scan a sheet of paper on both sides. Scanners without this capability can only scan both sides of a sheet of paper by reinserting it manually the other way up.
Duplex scanning is usually implemented on multifunction printers using a Reversing Automatic Document Feeder (RADF), which removes, reverses, and re-feeds the document after scanning one side. Duplex scanning is achieved on scanners by either RADF or by single pass duplex scanning using two cameras, one for each side of document; two-camera scanners scan twice as fast as a similar two-pass scanner.
Typical duplex scanners The following table compares features for a number of duplex scanners, mostly discontinued as of 2015: product dimensions (mm) dpi pages per minute (color) max page size interface Fujitsu fi-6130 A4 Series Scanner A4 Series Scanner Product Specifications 301 x 160 x 158 600 30@200dpi(60 duplex) A4 USB 2.0 Plustek MobileOffice D28 Corporate Plustek MobileOffice D28 Corporate Product Specifications 303 x 94 x 60 600 28 A4 USB 2.0 ScanShell 3000DN ScanShell 3000DN Product Specifications 300 x 50 x 45 600 3 A4 USB 2.0 Canon imageFORMULA P-150 280 x 95 x 40 600 10 216mm x 356mm USB 2.0 Canon DR-2080C Canon DR-2080C Product Specifications 298 x 209 x 99 600 36 216mm x 355mm USB 2.0 HP ScanJet 7650 Scanjet 7650 datasheet 482 x 340 x 162 2400 12 (6 duplex) 216mm x 305mm USB 2.0Fujitsu fi-5110C293 x 166 x 13060030A4USB 2.0
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