Apparatus and method for non-interactive electrophotographic dev

Details Apparatus and method for non-interactive electrophotographic dev Apparatus and method for non-interactive electrophotographic dev

1998-01-08

1999-08-31

Braun, Fred L.

Electrophotography

Image formation

Development

399277, G03G 1509

Patent

active

059465344

ABSTRACT:
An apparatus and method for non-interactive, dry powder development of electrostatic images including: an image bearing member bearing an electrostatic image; two component developer including toner and permanently magnetized carrier beads, the carrier having average diameter (2a) and magnetization M.sub.b a developer transporting member having a thickness t for transporting a developer layer of the two component developer, the layer spaced close to and out of contact with the image bearing member, and wherein the developer layer is substantially without chains of carrier beads, a multipole magnet member disposed in close proximity behind the transporting member and moving relative to it so as to sweep poles across its surface, the magnet member having a periodic magnetization of spatial frequency k and a peak magnetization M.sub.0
wherein M.sub.b, t, k, and M.sub.0, are chosen such that M.sub.b is sufficiently large to prevent the escape of developer, and a quantity ##EQU1## is greater than about 1/3.

REFERENCES:
patent: 3900001 (1975-08-01), Fraser et al.
patent: 4284031 (1981-08-01), Thaxter
patent: 4292387 (1981-09-01), Kanbe et al.
patent: 4557992 (1985-12-01), Haneda et al.
patent: 4662311 (1987-05-01), Shoji et al.
patent: 4868600 (1989-09-01), Hays et al.
patent: 5409791 (1995-04-01), Kaukeinen et al.
patent: 5799234 (1998-08-01), Furuya et al.

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