| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a developing apparatus capable of preventing the occurrence of a defective image such as fogging and contamination in the apparatus due to toner-scattering. <P>SOLUTION: The developing apparatus includes a developer carrier for holding two-component developer and carrying the developer to a part facing the image carrier, 1st and 2nd circulating member for stirring and circulating the two-component developer, a partitioning wall located between the 1st and 2nd circulating members, and for partitioning the inside of the developer apparatus into a 1st chamber wherein the developer carrier and the 1st circulating member exist and a 2nd chamber wherein the 2nd circulating member exists, and also, the partitioning wall has a notched part which is constituted so that a certain part is made lower in height than other parts, and also, a sheet-like valve member which can be open/closed toward only one chamber which is located on the downstream of the developer carrying direction, that is, either of the 1st chamber and the 2nd chamber with the pressure of the two-component developer is installed in the notched part. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
