Patent ID: 9471006
Filing Date: 2016-10-18
CPC Classification: G03G

Claim Text:
1. A developing device comprising: a developer carrying member for carrying developer; a container, provided with an opening for permitting discharge of developer, for accommodating developer; a sealing member for sealing the opening and for exposing the opening by unsealing; a conveying member for conveying developer toward said developer carrying member; and an unsealing member for moving said sealing member to expose the opening by rotation, wherein said sealing member includes (i) a first sealing portion provided at an end side thereof to seal the opening, (ii) a second sealing portion provided at the end side thereof to seal the opening and upstream of the first sealing portion with respect to the rotation, (iii) a holding portion provided at another end side thereof to be held by said unsealing member, and (iv) a connecting portion which is formed between said first and second sealing portions and said holding portion and on which a developer passing portion permitting passing of developer is formed, and wherein said sealing member is folded back so that said second sealing portion is unsealed before said first sealing portion, and wherein said conveying member is held by said unsealing member.