Magnet roll and method for manufacturing the same

Details Magnet roll and method for manufacturing the same Magnet roll and method for manufacturing the same

1984-01-30

1986-04-01

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

335306, 118657, 355 3DD, H01F 702

Patent

active

045801215

ABSTRACT:
A magnet roll for use in a developing device for developing an electrostatic latent image in an electrophotographic copier is provided. The magnet roll may be rotatably disposed inside of a developing sleeve so that magnetic toner may be transported along the circumference of the sleeve as magnetically attracted to the peripheral surface of the sleeve. The present magnet roll includes an impeller-shaped support and a plurality of magnet members provided as mounted on the support only at desired locations. The magnet member contains a matrix component, such as nitrile-butadiene rubber, and a magnetic component, such as ferrite powder. Therefore, the present magnet roll is light in weight and sturdy in structure.

REFERENCES:
patent: 3208296 (1965-09-01), Baermann
patent: 3643629 (1972-02-01), Kangas et al.
patent: 3742852 (1973-07-01), Leffler et al.
IBM Technical Disclosure Bulletin, vol. 17, No. 9, Feb. 1975, p. 2693, Magnetic Field Control for Magnetic Brush Developer, R. E. Ellis.

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