A process cartridge detachably mountable within an image forming system, including an image bearing member, a processing device for acting on the image bearing member, a housing for supporting the image bearing member and the processing device, and a cover shiftable between a protecting position where...http://www.google.de/patents/US6075956?utm_source=gb-gplus-sharePatent US6075956 - Process cartridge having shiftable cover and guide member for directing airflow
