| 摘要 |
A development device includes a development portion, having a developer spout, to develop a latent image formed on a latent image carrier with developer including toner and carrier particles; a circulation unit to convey developer collected from the development portion to the developer spout in the development portion; a developer container, provided in the circulation unit, to contain the developer at a position upstream from the development portion in a developer circular direction, the developer container having a cylindrical upper portion and a funnel-shaped lower portion continuous with the cylindrical upper portion through a joint so that a level of the developer contained in the developer container at rest is positioned near the joint between the cylindrical upper portion and the funnel-shaped lower portion; and an agitator, provided inside the developer container, to agitate and mix the collected developer and fresh toner supplied to the developer container. |
