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.

 

 

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