Xerographic developer unit having multiple magnetic brush...

Details Xerographic developer unit having multiple magnetic brush... Xerographic developer unit having multiple magnetic brush...

2005-10-31

2009-06-09

Gray, David M (Department: 2852)

Electrophotography

Image formation

Development

C399S276000, C399S274000

Reexamination Certificate

active

07546069

ABSTRACT:
A magnetic roll having longitudinal grooves machined in its rotating sleeve enables a pair of rolls to be rotated in a direction opposite to the direction of a photoreceptor moving through a development zone and a trim blade to be mounted proximate one of the rolls at a trim gap of approximately 0.5 to 0.7 mm. The magnetic roll includes a stationary core with at least one magnet, and a sleeve having longitudinal grooves that is mounted about the stationary core so that the sleeve rotates about the stationary core. The sleeve has a relatively smooth surface area between the grooves.

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patent: 6925277 (2005-08-01), Sugihara
patent: 2003/0170050 (2003-09-01), Terai

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