Electrostatic latent image developing apparatus

Details Electrostatic latent image developing apparatus Electrostatic latent image developing apparatus

1990-05-29

1991-12-10

Moses, R. L.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

355251, G03G 1509

Patent

active

050708120

ABSTRACT:
A developing apparatus for developing an electrostatic latent image formed on an image bearing member includes a developer chamber containing a developer comprising non-magnetic toner particles and magnetic carrier particles; a rotatable cylindrical developer carrying member, faced to the image bearing member, for carrying the developer supplied thereto in the developer chamber to supply it to the image bearing member; a magnet stationarily disposed in the developer carrying member to form a magnetic brush of the developer contactable to the image bearing member, wherein a position of maximum magnetic flux density in a direction normal to a surface of the developer carrying member provided by a developing magnetic pole of the magnet is not less than 3 degrees away from a position where the developer carrying member is closest to the image bearing member, and wherein a position of a peak of magnetic force in a direction normal to the surface of the developer carrying member provided by the developing magnetic pole is within 8 degrees from the closest position.

REFERENCES:
patent: 4504136 (1985-03-01), Yoshikawa et al.
patent: 4653427 (1987-03-01), Hosaka et al.
patent: 4841332 (1989-06-01), Haneda et al.
patent: 4844008 (1989-07-01), Sakemi et al.
patent: 4887131 (1989-12-01), Kinoshita et al.

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