Canon DADF-R1, Service Manual

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Chapter 3
3-45
5) When the host machine's scanner starts to move in reverse, the machine rotates the transport belt to move the
1st original to the reversing assembly. At this time, the machine butts the lead edge of the original against the
reversing roller to remove the skew.
F-3-81
6) The machine rotates the reversing roller and the transport belt to move the original over the copyboard glass.
When the trail edge of the 1st original has moved past the pre-registration roller paper sensor (S2), the
machine moves the original over a specific distance using the transport belt.
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7) The host machine's scanner starts to scan the original as part of printing operation.
At this time, the machine picks up the 2nd original, and executes pre-reversal. (See steps 1 and 2.)
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8) When the host machine's scanner starts to move in reverse, the machine rotates the reversing roller and the
transport belt to move the 1st and 2nd originals.
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Butting
Pre-registration roller
paper sensor(S2)
Scanning
(printing)
2nd original
1st original
2nd original