Magnetic roller for use in a developing device

Details Magnetic roller for use in a developing device Magnetic roller for use in a developing device

1991-08-12

1992-07-14

Grimley, A. T.

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

051293587

ABSTRACT:
A magnetic roller is fixedly mounted in a developing device provided in an image forming apparatus. The magnetic roller includes a magnetic member, which is made of a mixture of ferromagnetic material and polymeric compound. A plurality of magnetic poles are formed along the periphery of the magnetic member and consist of a main magnetic pole confronting an electrostatic latent image support member of the image forming apparatus, at least two magnetic poles formed adjacent to each other on one side of the main magnetic pole and having a polarity opposite to the polarity of the main magnetic pole, and at least two magnetic poles formed adjacent to each other on the other side of the main magnetic pole and having a polarity opposite to the polarity of the main magnetic pole.

REFERENCES:
patent: 3863603 (1975-02-01), Buckley et al.
patent: 4406535 (1983-09-01), Sakamoto et al.
patent: 4511239 (1985-04-01), Kanbe et al.
patent: 4607933 (1986-08-01), Haneda et al.
patent: 4825241 (1989-04-01), Saijo et al.
patent: 4881103 (1989-11-01), Seto et al.
patent: 4911100 (1990-03-01), Yamashita
patent: 4936249 (1990-06-01), Tajima et al.
patent: 4967691 (1990-11-01), Chikama et al.

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