Image forming apparatus, and a cartridge having a developer container detachably mountable on such apparatus

摘要

An image forming apparatus for forming image on a recording material includes a cartridge detachably mountable on the main body of the apparatus, which is provided with a developer container, a detector for detecting residual developer amounts in the developer container, and a memory for storing rewritable data, an access unit for accessing data on the memory, which writes data on consumed developer amounts to the memory after a detected residual amount of the residual amount detection detector arrives at a given value, and a display for indicating the absence of developer when data on consumed developer amounts arrives at a given value in the memory.