Canon imageRUNNER ADVANCE 4551i Service Manual page 81

Start of separation at
the seconddocument sheet/
Pressurization of
the Lower delivery reversal roller
Start of reading of top side of
second document sheet
Delivery of first document sheet
End of reading of front side of
second document sheet
Stop after feeding
the second document sheet
to reversal position
Removal of registration loop of
reverse side at the second document
sheet/Re-pickup/Release of
the Lower delivery reversal roller
To next
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2. Technology