A control system for collectively supervising a plurality of copiers or similar image forming apparatuses connected to a control device by communication lines with or without the intermediary of communication control units. To down-load data relating to image formation, the control device determines...http://www.google.de/patents/US5485246?utm_source=gb-gplus-sharePatent US5485246 - Control device for collectively supervising a plurality of image forming apparatuses
