| 摘要 |
The invention relates to a toner replenishment system for a dry toner developer unit in a photocopier. Toner is introduced into the developer unit in a canister which is closed at one end and has near its other end an extractor plate mounted for rotation around the axis of the canister and for axial movement along the canister, the toner powder being disposed between the closed end and the extractor plate. This canister can be simply loaded into a developer unit and then, during operation of the developer unit, toner demand is met at a metered rate by rotation of the extractor plate causing an extractor blade to slice toner and transfer it through the extractor plate to the axially outer side thereof for subsequent conveyance to the developer hopper. The toner extractor member is driven by a drive rotor activated by a differential screw mechanism having at least one of the shafts of the screw members resilient to allow the drive shafts to spring apart for automatically releasing the canister on depletion of the canister contents. |
