Patent ID: 7826765

Claim:
A developer container for supplying developer to a development device, the developer container comprising: a storage configured to store the developer; an opening through which the developer is supplied from the storage to the development device; a first seal member configured to seal the opening, the first seal member comprising: a seal portion configured to seal the opening; and a pull end provided on one end of the first seal member and combined with the seal portion, the pull end configured to be pulled in a predetermined direction to unseal the opening; a through-hole provided in a wall of the storage and configured to guide the pull end of the first seal member toward an opposite side of the opening, the through-hole comprising: a lead-in opening configured to lead the pull end of the first seal member into the through-hole; and a lead-out opening configured to lead the pull end of the first seal member out from the through-hole; and a second seal member provided on at least one of the lead-in opening and the lead-out opening of the through-hole and configured to elastically block the at least one of the lead-in opening and the lead-out opening, the second seal member comprising: a bonded portion bonded to a part of a periphery of the at least one of the lead-in opening and the lead-out opening; and a non-bonded portion not bonded to the periphery of the at least one of the lead-in opening and the lead-out opening and configured to allow the first seal member to move on the non-bonded portion, the non-bonded portion configured to elastically block the at least one of the lead-in opening and the lead-out opening when the first seal member is pulled out from the through-hole through the non-bonded portion, wherein the first seal member further comprises a hook provided on another end of the first seal member opposite the pull end via the seal portion, and configured to engage an edge of the non-bonded portion of the second seal member, and wherein, while the first seal member is pulled out from the through-hole through the edge of the non-bonded portion of the second seal member, the hook of the first seal member engages the edge of the non-bonded portion of the second seal member and inserts at least a part of the non-bonded portion of the second seal member into the through-hole to block the through-hole.