| 摘要 |
A development device includes a developer reservoir that stores liquid developer containing toner and carrier liquid, a supply port that is arranged at the developer reservoir to supply the liquid developer to the developer reservoir, a supply roller that has helical grooves and supplies the liquid developer stored in the developer reservoir and a developer carrier that is supplied with the liquid developer by the supply roller and carries the supplied liquid developer, and the supply port being arranged in the direction opposite to the direction of conveyance by the helical grooves of liquid developer stored in the developer reservoir relative to the axial center of the supply roller.
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