Disconnect the 3220ST's power cord to shut down the machine before opening the chip drawer.
Pull open the chip drawer at the base of the punch's front side.
Empty the drawer into a waste-paper or recycling bin.
Replace the paper tray, and reconnect the power cable.
Turn the paper release knob on the right side of the machine toward you while gently pulling on the paper to ease it out of the machine.
Re-insert the paper to finish punching. Don't feed more than 25 sheets of paper into the machine at once because this can cause further jams.