6.ADF duplex scanning (The document moves over the immovable CCD unit.)

(1)Set the document face up into the document chute. When the machine starts duplex scanning, the ADF motor is rotated clockwise, the pick-up roller draws the document, and the separation roller and separation pad send a sheet of the document to the ADF one by one from the top page of the stacked documents.

(2)The document is passed through the paper feed rollers 1, 2 and 3, and is passed over the CCD unit so that the document is scanned. Then, the document is sent for the specified distance by the SB (switch back) roller ASSY, and the SB (switch back) roller ASSY is turned counter so that the document is drawn again.

Paper feed roller 2

SB roller ASSY

Paper feed chute ASSY

 

 

 

Separation roller

 

 

ADF motor

 

Paper feed roller 3

Separation rubber

CCD module

Fig. 2-9

(3)The drawn document is attached on the flap B and sent to the paper feed rollers 2 and 3. At this time, the opposite side of the document is faced-up so that the backside of the document is scanned. The document is sent to the SB (switch back) roller ASSY again.

Paper feed roller 4

SB roller ASSY

 

Paper feed roller 3

Flap B

 

Paper feed roller 2

 

CCD module

Fig. 2-10

2-11

Confidential