Canon LBP-800 User Manual page 121

If you cannot see the front edge of the paper
If the paper becomes wrapped around the roller inside the fixing
assembly, neither the leading edge or the trailing edge of the paper may
be easily accessible. If this occurs, follow the procedure below to remove
the paper.
If the paper does not come out of the printer easily, check that the
pressure release levers (black) have been released as described on
page 99.
1. Gently bend the paper backwards and feed the paper back through
the paper transport slit at the back of the fixing assembly.
Be careful when handling the paper behind the fixing assembly. The toner
is not fixed to the paper and can easily dislodge. If toner gets on your
hands, wash it off with cold running water.
Chapter 4
107
Troubleshooting