An apparatus for and a method of feeding powders to a subsequent
processing step. In particular, the apparatus includes a first hopper, a
first metering brush feed, an intermediate chamber, a second distribution
brush, a level sensor, and a supply hopper to deliver powder to a pair of
rollers. In one embodiment, the hopper is fitted to the roller diameter
to produce a uniform, ribbon or free-standing sheets suitable for
air-breathing battery and fuel cell electrodes.