Apparatus and method for non-interactive magnetic brush developm

Details Apparatus and method for non-interactive magnetic brush developm Apparatus and method for non-interactive magnetic brush developm

1998-01-08

1999-08-03

Pendegrass, Joan

Electrophotography

Control of electrophotography process

Control of developing

399267, G03L 1509

Patent

active

059336838

ABSTRACT:
A development system including a developer transport adapted for depositing developer material on an imaging surface having an electrostatic latent image thereon, including a housing defining a chamber storing a supply of developer material including toner. A donor member is mounted partially in said chamber and spaced from the imaging surface, for transporting developer on an outer surface thereof to a region opposed from the imaging surface. The donor member has a magnetic assembly, which includes a plurality of poles, and a sleeve, enclosing said magnetic assembly and rotating about said magnetic assembly. A sensor measures a magnetic field of said donor roll at a predefined position on said donor roll. A magnetic system generates a magnetic field to reduce developer bed height of said developer material on said donor member in a development zone.

REFERENCES:
patent: 4357103 (1982-11-01), Kroll
patent: 4862828 (1989-09-01), Kumasaka et al.

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