| 摘要 |
The present invention provides a cartridge detachably attachable to a main body of an image forming apparatus which comprises a developing device, and the developing device includes a developer containing container, a developing container having a developer bearing member, a removable seal member for covering said opening portion, and a detecting portion for detecting an amount of the developer within the developing container, and the main body of the image forming apparatus detecting whether the seal member is removed or not by detecting the detecting portion by the main body of the image forming apparatus. <IMAGE> |
