Patent ID: 7713043

Claim:
A powder feeding apparatus comprising: a housing comprising first and second open ends, and having first and second pairs of substantially opposing walls; a feeder hopper formed at the first open end of the housing, having first and second open ends, the second open end of which is coupled to a first open end of an intermediate chamber, having first and second open ends, that is formed in the housing adjacent to the feeder hopper; a first perforated cradle positioned between the feeder hopper and the intermediate chamber; a metering brush disposed in the feeder hopper proximate to, and having an axis roughly parallel to, the first perforated cradle; a distribution hopper formed at the second end of the housing, having first and second open ends, the first open end of which is coupled to the second open end of the intermediate chamber; a second perforated cradle positioned between the intermediate chamber and the distribution hopper; and a distribution brush disposed in the intermediate chamber proximate to, and having an axis roughly parallel to, the second perforated cradle, wherein the distribution brush is configured to drive the powder through the second perforated cradle.