Multi sheet paper feed jam on 1235cn multi-function printer

This printer has an annoying habit of feeding 4, 5, or 6 sheets of paper at once from the paper tray, which of course immediately jams at the first set of rollers. This necessitates pulling the paper tray out and fixing the paper, then opening the back cover, which almost never has any paper jammed.

Is there some way to prevent this from happening?

Thanks for any help.