Fitzpatrick, Cella, Harper & Scinto
Process cartridge having a conductive member for use in detecting presence of the process cartridge, and image forming apparatus for using such a process cartridge
 The present invention provides a process cartridge mountable to an image forming apparatus, comprising an image bearing member, at least one process means acting on the image bearing member, and a detection member for detecting the presence/absence of developer supplied to the image bearing member on the basis of electrostatic capacity. 
Canon Kabushiki Kaisha
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Toshiyuki Makoto Masahiko Atsushi
Karakama Takeuchi Yashiro Numagami