Doctor blade for toner cartridge developer roller

Details Doctor blade for toner cartridge developer roller Doctor blade for toner cartridge developer roller

2007-09-18

2007-09-18

Chen, Sophia S. (Department: 2852)

Electrophotography

Image formation

Development

C399S274000

Reexamination Certificate

active

11181602

ABSTRACT:
A metering blade confronts the developer roller of a toner cartridge with a working face and associated upstream corner that is accurately controlled with respect to the developer roller to achieve a desired gap therebetween. More particularly, the quality of toner metering is determined through an appropriate technique and the angle of the bottom working face and working corner is varied using appropriate computer-controlled machining techniques to adjust the location of the corner with respect to the radial centerline of the roller at all points along the axial direction. In an illustrative embodiment, the blade's working face is formed to create a setback that is compound angle in two orthogonal directions. This compound angle reorients the upstream corner of the working face to compensate for irregular metering and electrostatic differences across the roller surface, particularly where toner is greater on one side of the roller than the other, opposing side.

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patent: 5805966 (1998-09-01), Yamada
patent: 6259878 (2001-07-01), Sato et al.
patent: 6360068 (2002-03-01), Kinoshita et al.
patent: 2003/0108364 (2003-06-01), Do
patent: 60-073659 (1985-04-01), None
patent: 11-194609 (1999-07-01), None

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