A powder dispersion apparatus, comprising: a support for supporting a powder-containing receptacle, the receptacle having a leading edge and at least one wall; an outlet; a feed tube communicating with the outlet, the feed tube structured and arranged to deliver powder from the receptacle to the outlet; and a receptacle impacting device that has a plurality of stable positions and comprising a movably mounted tri-lobed wheel with a central axle protruding out on one or more sides, the wheel is contrained axially by ribs that protrude from a bottom surface of the apparatus or a portion thereof, wherein slots in these ribs can contrain or limit the overall movement of the axle of the wheel and also allow it to ride up and down vertically, the wheel can be free to rotate and also move up and down in the slots and can be prevented from moving substantially axially or side-to-side, a spring is positioned to bias each side of the axle so as to cause a biasing of the tri-lobed wheel upwards and for biasing the receptacle impacting device to a stable position, the tri-lobed wheel positioned within the support such that as a receptacle is inserted into the support a leading edge thereof contacts a lobe of the wheel causing the wheel to move from an initial starting position and compress the spring, storing energy therein, until a spring maximum compression is reached, after which further insertion of the receptacle causes the receptacle impacting device to release the stored energy in a sudden rotation of the wheel causing a lobe of the wheel to impact the receptacle, the receptacle impacting device being further configured such that, following removal of the receptacle from the support the receptacle impacting device is left in a position which resembles the initial starting position such that the impacting device is ready for the insertion of another or new receptacle. a support for supporting a powder-containing receptacle, the receptacle having a leading edge and at least one wall; an outlet; a feed tube communicating with the outlet, the feed tube structured and arranged to deliver powder from the receptacle to the outlet; and a receptacle impacting device that has a plurality of stable positions and comprising a movably mounted tri-lobed wheel with a central axle protruding out on one or more sides, the wheel is contrained axially by ribs that protrude from a bottom surface of the apparatus or a portion thereof, wherein slots in these ribs can contrain or limit the overall movement of the axle of the wheel and also allow it to ride up and down vertically, the wheel can be free to rotate and also move up and down in the slots and can be prevented from moving substantially axially or side-to-side, a spring is positioned to bias each side of the axle so as to cause a biasing of the tri-lobed wheel upwards and for biasing the receptacle impacting device to a stable position, the tri-lobed wheel positioned within the support such that as a receptacle is inserted into the support a leading edge thereof contacts a lobe of the wheel causing the wheel to move from an initial starting position and compress the spring, storing energy therein, until a spring maximum compression is reached, after which further insertion of the receptacle causes the receptacle impacting device to release the stored energy in a sudden rotation of the wheel causing a lobe of the wheel to impact the receptacle, the receptacle impacting device being further configured such that, following removal of the receptacle from the support the receptacle impacting device is left in a position which resembles the initial starting position such that the impacting device is ready for the insertion of another or new receptacle.