Abstract: A coffee grinder assembly with a housing containing a pair of hoppers for containing coffee beans with a pair of hopper outlet chutes, or grinding chamber inlet chutes for feeding beans into a grinding chamber where the beans are ground by powered grinding discs or blades and then passed to a removable brew basket via an outlet chute with an outlet end that is in communication with a negative ion generator that ionizes the air in the outlet chute through which the ground coffee and chaff pass on their way to the brew basket to electrically neutralize the chaff to reduce chaff dispersion due to electrostatic repulsion of positively charged chaff.

Abstract: A coffee grinder assembly (10) with a housing (12) containing a pair of hoppers (16, 18) for containing coffee beans with a pair of hopper outlet chutes, or grinding chamber inlet chutes, (24, 26) for feeding beans into grinding chamber (30) where the beans are ground by means of powered grinding discs or blades and then passed to a removable brew basket via an outlet chute (36) with an outlet end that is in communication with a negative ion generator (40) that ionizes the air in the outlet chute (36) through which the ground coffee and chaff pass on their way to the brew basket to electrically neutralize the chaff to reduce chaff dispersion due to electrostatic repulsion of positively charged chaff.