Twelve Blade Revolving Shaver

So imagine your regular shaver with replaceable, disposable blades. Now, construct a circular assembly of blades somewhat similar to paddles on a waterwheel but on a flexible carriage and mount it to the handle on a rotary mechanism. At any given time three blades will be on plane to cut whiskers from your face, and when the pressure on the shaver is eased to make another stroke a pawl in the carriage advances the mechanism one blade. In this manner each blade on plane will make three cuts to your whiskers before being rotated out of plane and around the back of the mechanism.