Apparatus include a toner cartridge that defines a primary toner reservoir
and at least one secondary toner reservoir. A gate device is also
included, wherein the gate device is configured to selectively control the
flow of toner from the secondary toner reservoir to the primary toner
reservoir. Methods of operating a toner cartridge include providing a
toner cartridge having a primary toner reservoir and a secondary toner
reservoir. The toner cartridge is operated to initially deplete toner from
the primary toner reservoir. At a given level of toner depletion from the
primary toner reservoir, toner is dumped from the secondary toner
reservoir into the primary toner reservoir for replenishment thereof.
