Toner seal member, development cartridge, process cartridge and electrophotographic image forming apparatus

摘要

A toner sealing member to be used for sealing a developer container including a developer accommodating portion for accommodating a developer; and an opening for supplying the developer from the developer accommodating portion, the toner seal member being for sealing the opening, wherein the toner seal member unseals the opening by being automatically wound up when the developer container, the toner seal member including a sealing portion for covering and sealing the opening; a regulating portion for regulation an operation of a detecting member for detecting winding-up of the toner seal member to unseal the opening.