Canon Color imageCLASS MF8450c Basic Operation Manual page 427

Clearing Jams
5
Remove the jammed original.
Do not force a jammed paper out of the machine
as it may tear.
6
Return the release lever (A) to its original
position.
7
Close the inner cover.
12-4
8
Close the feeder cover.
9
Load the original in the feeder again.