Canon imageCLASS MF3110 Basic Manual page 94

If the leading edge of the paper is visible but has not entered the imaging
area:
IMPORTANT
9
9-4 Clearing Jams
Pull the paper forwards and roll it inwards.
Do not pull the jammed paper forward from the cassette. It may cause a machine
malfunction.
Do not pull the jammed paper upward; the toner on the paper will stain the machine and
cause a permanent reduction in print quality.