Developing apparatus

Details Developing apparatus Developing apparatus

1993-08-25

1994-10-25

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118658, 335303, G03G 1509

Patent

active

053593979

ABSTRACT:
A developing apparatus for developing an electrostatic latent image formed on an image bearing member includes a developer carrying member for carrying a developer containing toner particles and magnetic carrier particles. The developer carrying member moves through a developing zone for applying the developer to the electrostatic latent image. A stationary magnet assembly is disposed in the developer carrying member. The magnet assembly comprises a rare earth magnet having a first magnetic pole for forming a magnetic field in the developing zone and a resin magnet having a second magnetic pole disposed adjacent to the first magnetic pole downstream of the first magnetic pole with respect to a movement direction of the developer carrying member, wherein a maximum magnetic flux density on a developer carrying member provided by the first magnetic pole is larger than a maximum magnetic flux density on the developer carrying member by the resin magnet.

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patent: 5070812 (1991-12-01), Yamaji
patent: 5129357 (1992-07-01), Yamaji
patent: 5129358 (1992-07-01), Myochin et al.
patent: 5212344 (1993-05-01), Kageyama et al.

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