| 摘要 |
A device for measuring life of a process unit, the device including: a process unit detachably mountable in a main unit, the process unit including at least a photosensitive body having a surface on which can be formed a static electric latent image; a counter for measuring life of the process unit; an unused indication sheet provided internally to each unused process unit and discharged from the process unit when an unused process unit is mounted in the main unit; a sensor provided in the main unit, the sensor detecting discharge of each unused indication sheet and outputting an unused indication sheet discharge sensor signal accordingly; and a control unit provided in the main unit and capable of receiving the unused indication sheet discharge sensor signal from the sensor, the control unit resetting the counter upon receipt of the unused indication sheet discharge sensor signal from the sensor. <IMAGE> |
