Developing device for an image forming apparatus

Electrophotography – Image formation – Development

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Details

399102, 399252, 399284, 399285, G03G 1508

Patent

active

058093869

ABSTRACT:
In an image forming apparatus, a developing device includes an upper and a lower feed roller intervening between a developing roller and a toner hopper and contacting the developing roller. The upper and lower feed rollers feed toner to the developing roller. The two rollers rotate in opposite directions to each other in order to move the toner existing therebetween from the hopper side to the developing roller side. The device is capable of forming a laminate developer layer of uniform charge and uniform thickness on the developer carrier, and eliminating the need for a seal member between a casing and the developer carrier or simplifying its configuration.

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