but the lip on the edge of most flatbed scanners keeps the document from touching the platen properly. [Matthew] decided to hack his Canon LiDE 90 scanner to use it in a face-down format.

but the printer has what Canon calls semi-auto, which means I had to manually reinsert each sheet to complete the scan. It works, but takes time. If you need to copy double-sided documents often ...

For a more affordable option, you can consider the Canon imageFormula DR-C225II document scanner. It is a duplex scanner so you can get both sides of the paper scanned. Its scanning speed lets you ...