Image forming apparatus capable of toner replenishment based on

Details Image forming apparatus capable of toner replenishment based on Image forming apparatus capable of toner replenishment based on

1996-06-28

1998-10-06

Pendegrass, Joan H.

Photography

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Shutter

396 60, G03G 1508

Patent

active

058191321

ABSTRACT:
An image forming apparatus is capable of toner replenishment based on density reference toner image and toner replenishment based on ration of toner to carrier. The apparatus is provided with an image carrier, a developing unit for developing the electrostatic image on the image carrier with developer of toner and carrier, replenishing unit for replenishing the toner to the developing unit, image density sensing unit for sensing a density of the developed toner image, ration sensing unit for sensing a ratio of the toner to the carrier in the developing unit, and selecting unit for selecting one of first toner replenishment in which an amount of toner based on a sensing output from the image density sensing unit is replenished, and second toner replenishment in which an amount of toner based on a sensing output from the ratio sensing unit is replenished.

REFERENCES:
patent: 5057870 (1991-10-01), Aoki
patent: 5387965 (1995-02-01), Hasegawa et al.

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