Patent ID: 6137970
Filing Date: 2000-10-24
Classification: G03G

Abstract:
A cartridge detachably attachable to main body of an image forming apparatus, comprising:a developing device for developing an electrostatic image formed on an image bearing member with developer, said developing device including:a developer containing container for containing the developer;a developing container having a developer bearing member for bearing and conveying the developer to a developing position where the electrostatic image is developed, the developer being supplied from said developer containing container to said developing container through an opening portion;a removable seal member for covering said opening portion, wherein said seal member has a conductive portion; anda detecting portion for detecting an amount of the developer within said developing container, wherein the main body of said image forming apparatus detects whether said seal member is removed or not in dependence upon the presence or absence of said conductive portion when said detecting portion is detected by the main body of said image forming apparatus.