Magnetic brush developing device

Details Magnetic brush developing device Magnetic brush developing device

1975-05-13

1976-08-31

Stein, Mervin

Coating apparatus

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

With electromagnetic and/or electrostatic removal of...

427 18, G03G 1509

Patent

active

039773612

ABSTRACT:
A magnetic brush developing device including a plurality of developing rollers each consisting of a cylindrical stationary magnet and a cylindrical sleeve rotating around said magnet, said plurality of developing rollers being disposed among the surface of a latent image forming member, wherein said cylindrical stationary magnets each have (a) a developing magnetic pole positioned in a portion facing the surface of latent image forming member, (b) a transporting magnetic pole positioned rearwardly of said developing magnetic pole in the travelling direction of a developing agent and having an opposite polarity to that of the developing magnetic pole, and (c) an auxility transporting magnetic pole positioned in a portion facing the preceding developing roller in the travelling direction of developing agent and having a polarity identical with the polarity of said transporting magnetic pole, said developing magnetic poles having the identical polarity and thus delivery and receipt of the developing agent between the adjacent developing rollers is effected between the transporting magnetic pole of the preceding developing roller and the developing magnetic pole of the succeeding developing roller.

REFERENCES:
patent: 3392432 (1968-07-01), Naumann
patent: 3457900 (1969-07-01), Drexler
patent: 3543720 (1970-12-01), Drexler et al.
patent: 3641980 (1972-02-01), Bickmore
patent: 3654902 (1972-04-01), Hakanson
patent: 3724422 (1973-04-01), Latone et al.
patent: 3881446 (1975-05-01), Kurita et al.
patent: 3908595 (1975-09-01), Okada
IBM Technical Disclosure Bulletin; vol. 14, No. 9, Feb. 1972, pp. 2787-2788; Magnet Configuration for Magnetic Brush Developer; Hoekzema, R. J.
IBM Technical Disclosure Bulletin; vol. 2, No. 2, Aug. 1959, Development of Electrostatic Images; Medley, H. C.

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