Electrophotography – Image formation – Development
Reexamination Certificate
2005-10-31
2008-07-29
Lee, Susan S (Department: 2852)
Electrophotography
Image formation
Development
C399S276000
Reexamination Certificate
active
07406279
ABSTRACT:
A development subsystem is used to develop toner particles transported by semiconductive carrier particles. The development subsystem includes a developer housing for retaining a quantity of developer having semiconductive carrier particles and toner particles, a first magnetic roll having a stationary core with at least one magnet and a sleeve that rotates about the stationary core of the first magnetic roll, a second magnetic roll having a stationary core with at least one magnet and a sleeve that rotates about the stationary core of the second magnetic roll, a motor coupled to the first and the second magnetic rolls to drive the rotating sleeves of the first and the second magnetic rolls at different velocities relative to a velocity for a photoreceptor that rotates in proximity to the first and second magnetic rolls, the first and second magnetic rolls being driven in a direction that is with the direction of rotation of the photoreceptor so that the first and the second magnetic rolls carry semiconductive carrier particles and toner particles through a development zone formed by the first and the second magnetic rolls that is proximate to the photoreceptor.
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Chappell James M.
Howe Patrick J.
Thompson Michael D.
Lee Susan S
Maginot Moore & Beck
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