Developing device for an image forming apparatus and toner cartr

Details Developing device for an image forming apparatus and toner cartr Developing device for an image forming apparatus and toner cartr

1996-02-15

1998-03-31

Royer, William J.

Electrophotography

Image formation

Development

399256, 399258, 399260, 399262, G03G 1508

Patent

active

057349525

ABSTRACT:
A developing device for an electrophotographic image forming apparatus and a toner cartridge for replenishing a fresh toner to the developing device are disclosed. A toner is circulated between a toner cartridge and a hopper so that an additive included in the toner existing in the developing device is adequately distributed throughout the developing device. This prevents the concentration of additive in the toner from differing at the ends of the hopper with respect to the center of the hopper. This ensures that images are produced with constant toner density.

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