Canon : PIXMA Manuals : MX490 series : Cleaning the ADF (Auto Document Feeder)
Canon ImageFormula RS40 Photo and Document Scanner Review | PCMag
Amazon.com: Canon imageFORMULA R40 Office Document Scanner For PC and Mac, Color Duplex Scanning, Easy Setup For Office Or Home Use, Includes Scanning Software : Office Products
Canon imageFORMULA DR-C230 Office Document scanner - CMOS / CIS - Duplex - Legal - 600 dpi - up to 30 ppm (mono) / up to 30 ppm (color) - ADF (60 sheets) - up to 3500 scans per day - USB 2.0