Developing apparatus with discharge regulating member

A developing apparatus comprising:

• a developing container for containing a developer comprising toner and carrier, said developing container including a first chamber configured to accommodate the developer, a second chamber provided adjacent to said first chamber in a direction crossing with a longitudinal direction of said first chamber and communicating with said first chamber to establish a circulation path along which the developer circulates, a partition between said first chamber and said second chamber, a first communication opening provided at one end portion side of said partition with respect to the longitudinal direction and configured to supply the developer from said first chamber into said second chamber, and a second communication opening provided at the other end portion side of said partition with respect to the longitudinal direction and configured to supply the developer from said second chamber into said first chamber;
• a first rotatable feeding member provided in said first chamber and configured to feed the developer, said first feeding member including a rotatable shaft, a first helical blade portion provided around said rotatable shaft and configured to feed the developer, and a second helical blade portion provided around the rotatable shaft at a position downstream of said first helical blade portion with respect to a developer feeding direction of said first helical blade portion, said second helical blade portion having a helix which is opposed to that of said first helical blade portion:
• a second rotatable feeding member provided in said second chamber and configured to feed the developer;
• a discharge opening provided downstream of said second helical blade portion with respect to the developer feeding direction of said first helical blade portion and configured to permit discharge of the developer out of said developing container;
• and
• a disk portion provided on said rotatable shaft at a position between said first helical blade portion and said second helical blade portion.