Developing apparatus with plural developer bearing members...

Details Developing apparatus with plural developer bearing members... Developing apparatus with plural developer bearing members...

2006-01-31

2006-01-31

Base, Sandra L. (Department: 2852)

Electrophotography

Image formation

Development

C399S277000

Reexamination Certificate

active

06993274

ABSTRACT:
A developing apparatus for developing an electrostatic image formed on an image bearing member includes a first developer bearing member for bearing magnetic developer to transport it to a first developing portion, a first magnetic field generator stationarily provided in the first developer bearing member, a second developer bearing member for bearing magnetic developer to transport it to a second developing portion, and a second magnetic field generator stationarily provided in the second developer bearing member. The first developer bearing member and the second developer bearing member supply the magnetic developer to the electrostatic image on the image bearing member in the mentioned order. In addition, a peak value of a normal line direction component of a magnetic force generated in the vicinity of the second developing portion is greater than a peak value of a normal line direction component of a magnetic force generated in the vicinity of the first developing portion.

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patent: 05-204248 (1993-08-01), None

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