An electrographic printer is disclosed including a replenisher system for
replenishing developer material in a development chamber by transferring
replenisher from a replenisher supply source through an opening into a
transporter in communication with the replenisher supply source and the
chamber having a filter disposed between the replenisher supply source
and the transporter to limit the size of particles passing from the
replenisher supply source to the transporter. A filtered replenisher
cartridge and method of supplying replenisher with a refilled replenisher
cartridge are also disclosed.