| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device, capable of informing the appropriate replacing time to a user, by accurately detecting the developer quantity and informing the result to a user, and to provide a cartridge and an image forming system. SOLUTION: In this image forming device (100) which a cartridge (B) is attachable to and detachable from, information corresponding to the output value obtained when the means for detecting the residual developer quantity (30) detects the maximum of the developer quantity, is stored by a storage means (20) provided on the device main body (A). |
