It uses ping-pong balls that are painted with numbers
and carefully calibrated for size and weight.
These balls are released into the
machine and jets of air blow up through the chamber to mix them.To select a set of balls for the air-mix machine, the
operator opens a valve that allows air out of the machine through a set of
tubes near the top of the machine.
Once the valve is open, balls are blown into the tube
and are then transferred through another clear tube into a display area for