Apparatus for developing electrostatic latent image

Details Apparatus for developing electrostatic latent image Apparatus for developing electrostatic latent image

1989-04-13

1990-07-10

Prescott, A. C.

Photocopying

Contact printing

Light boxes

355245, 118658, G03G 1509

Patent

active

049410199

ABSTRACT:
A developing apparatus wherein a developer is carried on a rotatable developing sleeve having a magnet therein into a developing zone where the sleeve and a image bearing member carrying an image to be developed is opposed to each other. A tangential component of a magnetic field formed on the sleeve surface by a developing magnetic pole disposed faced to the developing zone changes with an angular position on the sleeve. A change rate thereof has a local maximum or local minimum not less than 30 Gausses per degree. By this, "tails" and "scattered spots" are prevented from being produced on a developed image.

REFERENCES:
patent: 4334772 (1982-06-01), Suzuki
patent: 4370049 (1983-01-01), Kuge et al.
patent: 4422405 (1983-12-01), Kasahara et al.
patent: 4557992 (1985-12-01), Haneda et al.
patent: 4585326 (1986-04-01), Okamoto et al.
patent: 4676191 (1987-06-01), Kojima et al.
patent: 4766458 (1988-08-01), Oka et al.
patent: 4792225 (1988-12-01), Itaya
patent: 4799086 (1989-01-01), Mori

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