Patent ID: 8295741

Claim:
A developing apparatus comprising: a developer carrying member; a developer accommodating container extending from one end to the other end along said developer carrying member, and in which developer is accommodated; a first feeding member provided within said developer accommodating container and feeding the accommodated developer while agitating; and a second feeding member provided within said developer accommodating container and feeding the developer to said developer carrying member, wherein said developer accommodating container comprises: a first accommodating portion in which said first feeding member is arranged; a second accommodating portion in which said second feeding member is arranged; a first communication portion communicating said first accommodating portion and said second accommodating portion in one end side; a second communication portion communicating said first accommodating portion and said second accommodating portion; a developer replenishing portion arranged away from said second communication portion, in the other end side of said first accommodating portion; a developer discharge portion arranged in the other end away from said second communication portion, in the other end side of said second accommodating portion; and a flow rate regulating portion comprising a changeable opening portion and being arranged between said second communication portion and the developer discharge portion, and regulating an amount of the developer passing through the opening portion by changing a cross sectional area of the opening portion.