Developer container and image forming apparatus including the same

A developer container, comprising:

• a housing including a storage space configured to contain developer, and an opening having a longer dimension and communicating with the storage space for allowing the developer to flow therethrough;
• a sealing member attached to the housing and sealing the opening in a longitudinal direction of the opening;
• and
• a winder mechanism configured to wind up the sealing member while peeling the sealing member from the housing, wherein
• the sealing member is in a folded state that a first end of the sealing member and a second end opposite to the first end are disposed on one end of the housing in the longitudinal direction and a crease of the sealing member is on the other end of the housing in the longitudinal direction with a sealing surface of the sealing member sealing the opening,
• the winder mechanism includes
• a winder shaft disposed at the one end of the housing in the longitudinal direction and fixedly holding the second end of the sealing member,
• a drive transmission mechanism configured to transmit a torque to the winder shaft, and
• an interrupting member fixedly holding the first end of the sealing member and connected to the drive transmission mechanism, the interrupting member being operable to interrupt the transmission of the torque of the drive transmission mechanism owing to a tension of the sealing member caused by peeling the first end fold side of the sealing member from the housing.