IMAGE FORMING DEVICE, CARTRIDGE, AND IMAGE FORMATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an image forming device, a cartridge, and an image formation system, which can accurately detect the amount of a developer and notify a user of it to let the user know a proper cartridge replacement time. SOLUTION: The image forming device (100) whose cartridge (B) is attachable/detachable is provided with a developer sealing member (6) which is unsealed at the start of the usage of the cartridge between the developer container (4) of the cartridge and a developing means (5), and information corresponding to the value outputted by a developer remaining amount detecting means (30) in a device main body (A) before the developer sealing member (6) is unsealed is stored in a storage means (20) that the device main body (A) is equipped with.