US Patent 7735622 Coin machine with self-cleaning intake hopper and related method

A hopper for a coin processing machine has a turntable that receives coins and rotates in a first direction to discharge coins from the hopper. A circumferential wall surrounds the turntable, and includes a coin discharge opening and a second opening. A diverter plate extends away from the wall upstream of the second opening. The diverter plate blocks coins from entering the second opening when the turntable rotates in the first direction. The diverter plate directs any debris remaining on the turntable to the second opening when the turntable rotates in the opposite, second direction after discharging all the coins from the hopper.