ADF feed systemThe ADF has built-in duplexing capability for scanning two-sided documents. Pages from the original document enter the ADF from the ADF input tray. A separation roller and separation pad work together to separate the top sheet from the stack. The page passes through a set of registration rollers and two sets of feed rollers that advance the page. A set of delivery rollers delivers the page to the ADF output bin. A bin-full sensor detects when the ADF output bin is full and stops the feed mechanism until the bin is emptied.
| | Read Motor | |
| | Feed Motor |
| Separation roller | |
| Empty sensor | |
| | Cover open sensor | |
Registration sensor | | Pickup roller | |
| | |
Registration roller | | | |
| | ADF input tray |
| | Delivery roller | |
Feed roller | Separation pad | |
| | |
Read sensor | | | |
| Scanning position | Delivery tray |
| |
| Exit sensor | Bin full sensor | glass |
| | |
Carriage
Motor
Optical unit
Figure 4-4ADF paper path and sensors
32 Chapter 4 Theory of operation | ENWW |