Developing apparatus using magnetic carrier under AC field

Details Developing apparatus using magnetic carrier under AC field Developing apparatus using magnetic carrier under AC field

1988-03-15

1989-10-10

Braun, Fred L.

Photocopying

Contact printing

Light boxes

118657, 355253, G03G 1509

Patent

active

048735515

ABSTRACT:
The present invention relates to a developing apparatus using magnetic carrier particles and toner particles under the influence of an alternating current. One embodiment of the present invention includes a developer which is a mixture of toner particles and resin coated magnetic particles. An alternating electric field is formed between a latent image bearing member and developer carrying member to form a toner image corresponding to an electrostatic latent image. An electric resistivity curve of the magnetic particles on a coordinate graph, where the abscissa represents an electric field E (V/cm) applied to the magnetic particles and the ordinate represents an electric resistivity R (ohm-cm) of the magnetic particles, crosses a zone defined by lines, AB, BD, DC and CA, where

REFERENCES:
patent: 4391891 (1983-07-01), Tamaura et al.
patent: 4482244 (1984-11-01), Yamazaki et al.
patent: 4672017 (1987-06-01), Kamezaki
patent: 4686935 (1987-08-01), Matsui et al.
patent: 4710015 (1987-12-01), Takeda et al.

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