Developing apparatus configured to prevent splashing of...

Details Developing apparatus configured to prevent splashing of... Developing apparatus configured to prevent splashing of...

2005-09-06

2005-09-06

Royer, William J. (Department: 2852)

Electrophotography

Internal machine environment

Particle or contaminant control

C399S099000, C399S103000, C399S267000

Reexamination Certificate

active

06941090

ABSTRACT:
A developing apparatus prevents or reduces splashing of toner and carrier caused by abnormal outward airflows generated at downstream positions of a developing unit casing thereof through interactions between behaviors of magnetic brushes and local portions of the developing unit casing. The developing apparatus includes a developer carrying member, a first permanent magnet, a developing unit casing, a second permanent magnet, which is built in the developer carrying member at a fixed position at the downstream side from the first permanent magnet with respect to the rotational direction of the developer carrying member. The developing unit casing has a concave structure to form a low pressure area at a position facing the second permanent magnet. The low pressure area suppresses an increase in the speed of the airflow therein that causes the abnormal outward airflows.

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