Electrostatic latent image developing apparatus

Details Electrostatic latent image developing apparatus Electrostatic latent image developing apparatus

1988-08-12

1989-12-12

Braun, Fred L.

Photocopying

Contact printing

Light boxes

118657, 355260, G03G 1509

Patent

active

048871303

ABSTRACT:
An electrostatic latent image developing apparatus has a magnet housed in a developing sleeve and having at least one magnetized portion including adjacent poles of the same polarity. At least one of the poles of the magnetized portion is opposed to the casing of the developing apparatus, between the position where the developing sleeve is opposed to an electrostatic latent image bearing member and the position where the sleeve is opposed to a developer agitating roller. The other pole adjacent to and having the same polarity as this pole is positioned downstream from the pole with respect to the direction of rotation of the sleeve. Consequently, the upstream pole of the magnetized portion acts to retain a portion of developer between the developing sleeve and the casing, whereby the toner is prevented from spilling over the casing.

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