Canon LBP-800 User Manual page 115

If the paper has moved completely into the printer
Follow the steps described in "Before Removing Paper Jams Inside the
Printer" on page 96 to remove the toner cartridge, then follow the
procedure below.
1. Remove any paper from the input area by gently pulling it forward.
2. Roll the edge of the paper inwards so that the printed surface is on
the inside of the roll, then gently pull the rolled up paper out of the
printer.
3. If the leading edge of the paper is visible but has not entered the
imaging area, pull the paper forwards and roll it inwards. Do not pull
the paper upwards from the paper input slot, as this may damage the
printer. Gently pull the paper out of the printer.
Chapter 4
101
Troubleshooting