Ghosting preventing development apparatus and a reproduction machine including same

A ghosting preventing development process cartridge detachably mountable into an electrostatographic reproduction machine is provided. The ghosting preventing development process cartridge includes a housing having walls defining a partially enclosed storage chamber for storing developer material, and a development opening into the storage chamber. The ghosting preventing development process cartridge also includes a donor roll, mounted rotatably outside the chamber and near the development opening, for receiving a layer of developer material from the storage chamber, and for donating portions of such developer material layer within a development nip to image areas of an image being developed thus leaving a spent developer layer on the donor roll downstream of the development nip. The ghosting preventing development process cartridge further includes a developer material disturbing (DMD) member mounted into moving contact with the donor roll, and downstream of the development nip, for disturbing the spent layer of developer material on the donor roll, thereby preventing ghosting effects occurring in subsequently developed toner images by eliminating any ghost effects of a previously developed toner image from the spent layer of developer material on the donor roll.