Image-forming machine equipped with an exchangeable developing u

Details Image-forming machine equipped with an exchangeable developing u Image-forming machine equipped with an exchangeable developing u

1993-11-22

2000-12-19

Royer, William J.

Electrophotography

Diagnostics

Consumable

G03G 1508

Patent

active

061636606

ABSTRACT:
The image-forming machine has an electrostatic latent image-bearing member on which an electrostatic latent image will be formed and an exchangeable developing unit. The developing unit includes a developing housing, a developing agent contained in the developing unit and a developing agent applicator for applying the developing agent onto the surface of the electrostatic latent image-bearing member. A counter is provided that counts the number of times the developing unit has been used and that can be reset. In the developing unit is disposed a developing agent depletion detector that detects the depletion of the developing agent. The developing unit further has a reset that resets the counter when the use of the developing unit is started. When the developing agent depletion detector has detected the depletion of the developing agent, a developing unit exchange signal is formed to indicate that the developing unit be renewed. The developing unit exchange signal is formed even when the counter has counted a predetermined number that corresponds to the life of the developing unit.

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