In an image-forming section, a communication device is attached to the top surface of a developing cartridge that is detachably attached to a developing device, and a main body side communication device is attached to a copying machine main body in a manner so as to face the top portion of the communication...http://www.google.fr/patents/US6324351?utm_source=gb-gplus-shareBrevet US6324351 - Image-forming apparatus unit and image-forming apparatus
Image-forming apparatus unit and image-forming apparatus
