Developing device and image forming apparatus

Details Developing device and image forming apparatus Developing device and image forming apparatus

2007-11-20

2007-11-20

Lee, Susan (Department: 2852)

Electrophotography

Image formation

Development

C399S273000

Reexamination Certificate

active

11797710

ABSTRACT:
A developing device and an image forming apparatus equipped with the developing device are provided to suppress the deterioration in picture quality of an image formed on a sheet due to toner-clump created in a developer vessel. The developing device, comprising: a developing roller adapted to hold toner thereon while rotating and to supply the toner onto a photosensitive surface of a photosensitive body; a toner recovery vessel adapted to accommodate the developing roller therein with facing an opening portion thereof and to supply the toner to be held on the developing roller onto the developing roller while recovering residual toner remaining on the developing roller; and the toner vessel including a protrusion portion protruded toward a roller surface of the developing roller, the protrusion portion being provided at an inner wall part which confronts the roller surface of the developing roller and where the residual toner begins to drop from the developing roller.

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