In a coin discriminating device, an apparatus for cleaning a mass of items, including a plurality of desired coins of various diameters, prior to conveyance to a coin discriminator, wherein none of said desired coins is smaller than a predetermined smallest desired coin, to define a minimum coin diameter, and none of said desired coins is larger than a predetermined largest desired coin, to define a maximum coin diameter, the apparatus comprising:
- a container having at least a first opening for admitting a first plurality of said mass of items and a plurality of second openings, smaller than said first opening, for permitting exit of dirt from said container without having first passed through a container opening smaller than said maximum coin diameter, each of said second openings being smaller than said minimum diameter to prevent passage of any of said plurality of desired coins through any of said plurality of second openings;
- a driver, coupled to said container, so as to move said container and agitate said first plurality of said mass of items;
- and
- at least a first vane protruding inwardly from an interior surface of said container.