Developing apparatus to control bending of a magnetic field...

Details Developing apparatus to control bending of a magnetic field... Developing apparatus to control bending of a magnetic field...

2005-12-20

2005-12-20

Grimley, Arthur T. (Department: 2852)

Electrophotography

Image formation

Development

C399S104000, C399S258000, C399S269000, C399S274000, C399S275000, C399S281000, C399S282000

Reexamination Certificate

active

06978108

ABSTRACT:
To control bending of a magnetic field generation unit provided inside a developer carrying member, a developing apparatus for developing an electrostatic image formed on an image bearing member according to the present invention includes: a developer container which contains a magnetic developer; first and second developer carrying members which carry the developer in the developer container to the image bearing member; and first and second magnetic field generation units which are fixedly arranged in the first and second developer carrying members. In the developing apparatus, the first magnetic field generation unit and the second magnetic field generation unit form a magnetic field for delivering the developer from the first developer carrying member to the second developer carrying member, and the developing apparatus further includes a magnetic unit which exerts a magnetic force, which resists a magnetic force caused by the magnetic field, on the first and second magnetic field generation units.

REFERENCES:
patent: 4030447 (1977-06-01), Takahashi et al.
patent: 5923933 (1999-07-01), Anzai et al.
patent: 5995790 (1999-11-01), Takeda
patent: 6055401 (2000-04-01), Tonomoto et al.
patent: 6269235 (2001-07-01), Nishiyama
patent: 2002/0022190 (2002-02-01), Iizuka et al.
patent: 51-43151 (1976-04-01), None

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