Development device transferring only a toner layer to a...

Details Development device transferring only a toner layer to a... Development device transferring only a toner layer to a...

2008-07-22

2011-12-06

Gray, David (Department: 2852)

Electrophotography

Image formation

Development

C399S282000, C399S285000

Reexamination Certificate

active

08073369

ABSTRACT:
A development device includes a developing roller composed of an elastic body. An intermediate roller made of metal is disposed closely to the developing roller so as to face the developing roller. A magnetic roller is disposed closely to the intermediate roller so as to face the intermediate roller. A developer layer composed of a magnetic carrier and a toner is formed on the surface of the magnetic roller. The developer layer is carried to the intermediate roller side, and only the toner in the developer layer is transferred to the intermediate roller. A toner layer formed thus is transferred from the intermediate roller to the developing roller, and brought into contact with the surface of an image carrying member.

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