Jamming Canon IRC 3170i jamming after first page

Hi,

I have been scouring the forums, but haven't seen this particular issue yet:

Copier prints out one single page just fine, every time. However, when more printing or copying more than one page the paper jams randomly on the second or third sheet. I have checked all rollers, but nothing seems wrong. Fixing and pressure rollers are in good shape too. Any advice?

Thanks,
TCSL