Developing apparatus using magnetic particles and toner particle

Details Developing apparatus using magnetic particles and toner particle Developing apparatus using magnetic particles and toner particle

1988-03-15

1989-12-12

Braun, Fred L.

Photocopying

Contact printing

Light boxes

118657, 355251, G03G 1509

Patent

active

048871311

ABSTRACT:
A developing apparatus for developing an electrostatic latent image on an electrostatic latent image bearing member includes a container for containing a developer which contains toner particles and magnetic particles, a developer carrying member, opposed to the electrostatic latent image bearing member, for forming a developing position for supplying the toner particles to the latent image bearing member and for carrying the developer from the container to the developing position, magnetic field generating magnet disposed across the developer carrying member from the latent image bearing member for generating a magentic field, developer regulating member for regulating the developer which contains the toner particles and carrier particles and which is carried to the developing position, wherein the magnetic field generating magnet includes one magnetic pole adjacent an upstream side of the regulating member with respect to a movement direction of the developer carrying member, and wherein a magnetic flux density downstream of the one pole less steeply decreases the increase thereof at an upstream side.

REFERENCES:
patent: 4386577 (1983-06-01), Hosono et al.
patent: 4391512 (1983-07-01), Nakamura et al.
patent: 4511239 (1985-04-01), Kanbe et al.
patent: 4517274 (1985-05-01), Honda et al.
patent: 4559899 (1985-12-01), Kan et al.
patent: 4607938 (1986-08-01), Hosoi et al.
patent: 4653427 (1987-03-01), Hosaka et al.

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