| 摘要 |
A method of detecting whether a part or an exchanged expendable supply mounted on the machine is a genuine part. A reflected wave scanner 11 is installed near a cartridge chamber of a copier 31, and an LC resonance tag 1 is attached to a genuine toner cartridge 32 to indicate that it is a genuine part. When the genuine toner cartridge 32 is mounted on the copier 31, the reflected wave scanner 11 analyzes the waves reflected by the LC resonance tag 1 to judge that it is a genuine part, whereby a message such as "YOU CAN MAKE COPIES" is displayed on a display unit and the copier 31 enters into a standby state. When a non-genuine toner cartridge is mounted, the waves reflected by the LC resonance tag are not detected, whereby it is so judged that the toner cartridge is a non-genuine part, and a message such as "PLEASE REPLACE THE TONER CARTRIDGE" is displayed on the display unit of the copier 31.
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