| 摘要 |
PROBLEM TO BE SOLVED: To accurately detect the life of a process cartridge. SOLUTION: A non-volatile storing means 60 such as an NVRAM, etc., is arranged in the cartridge 100, then, information on the used amount of the photoreceptor drum 1 and history information on detection that the remaining quantity of developer 7 is equal to or below a prescribed amount are stored by the storing means 60. The contents of the storing means 60 is read in the body 120, and the state of the cartridge 100 is decided, based on the contents of the used amount information and the history information, and then, an alarm is given in accordance with the situation so as to inform the user of the life of the cartridge. It is allowed to store information on the capacity of the cartirdge 100, etc., in the storing means 60. |
