A hopper coin feeder (1) comprises upper and lower hopper discs (18, 25). A flexible hopper wall (17) of diabolo shape cooperates with the upper disc (18) to control the feeding of coins by a coin pushing member (35) to the outer margin of the disc (18) where they are gripped between an annular band...http://www.google.co.uk/patents/US7658668?utm_source=gb-gplus-sharePatent US7658668 - Coin handling equipment
