Microchannel print head for electrographic printer

摘要

Electrographic printing apparatus for forming a toner image on a recording medium includes: a magnetic brush having a rotatable magnetic core (22) and a stationary outer cylindrical shell (24); a developer supply for supplying a magnetic developer powder to the magnetic brush; an array of microchannels (40) on the outer shell (24) for forming a plurality of parallel lines of developer in the channels; means for selectively transferring developer from the lines to a receiver (34); and a receiver electrode (14) arranged in spaced relation to the array of microchannels (40) to define a recording region through which the receiver (34) can be moved.