Toner particle dispenser

An electrostatographic printing machine of the type having an electrostatic latent image of an original document being reproduced recorded on an insulating medium, wherein the improvement includes:

• a housing member defining a chamber for storing a developer mix comprising carrier granules and toner particles;
• means for vibrating said housing member at predetermined intervals of time;
• a dispensing member mounted on said housing member and having a plurality of apertures therein arranged to permit toner particles to pass therethrough;
• at least one blade member operatively associated with said dispensing member, said blade member having a generally planar surface extending into the supply of toner particles in said housing member;
• means for reciprocating said blade member in a direction transverse to the planar surface thereof so that said blade member forms a groove in the particles preventing the bridging and caking thereof;
• and
• at least one stop member operatively associated with said dispensing member and having a generally planar surface extending into the supply of toner particles in a direction substantially normal to the direction of reciprocation of said blade member, said stop member remaining substantially stationary as said blade member reciprocates to prevent the movement of the toner particles therewith.