fulfilling a continuous function within the electrographic apparatus during the use of the supplied developer material, e.g. toner discharge on demand, storing residual toner, not acting as a passive closure for the developer replenishing opening

Full Title

Apparatus for electrophotographic processes > Developing structures, details > Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material > fulfilling a continuous function within the electrographic apparatus during the use of the supplied developer material, e.g. toner discharge on demand, storing residual toner, not acting as a passive closure for the developer replenishing opening