ADF feed system
The 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.
Registration sensor
Registration roller
Feed roller
Read sensor
Read Motor
Feed Motor
Separation roller
Empty sensor
Cover open sensor
Pickup roller
ADF input tray
Delivery roller
Separation pad
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 |