Image forming apparatus with a toner density sensor

Details Image forming apparatus with a toner density sensor Image forming apparatus with a toner density sensor

2005-12-20

2005-12-20

Grimley, Arthur T. (Department: 2852)

Electrophotography

Control of electrophotography process

Control of developing

C399S063000

Reexamination Certificate

active

06978094

ABSTRACT:
This invention relates to an image forming apparatus including a developing unit which develops an electrostatic latent image formed on an image carrier by using a two-component developing agent containing polymerized toner. The developing unit includes a supply/convey member which conveys the two-component developing agent in the axial direction while agitating it and a toner density sensor which detects the toner density of the two-component developing agent. The toner density sensor is placed to be in a non-contact state with respect to the supply/convey member and oppose it with a gap of 0.8 mm or less. The diameter of the supply/convey member is set to 23 mm or more.

REFERENCES:
patent: 6104892 (2000-08-01), Kobayashi et al.
patent: 6249664 (2001-06-01), Sato
patent: 6473584 (2002-10-01), Hibino et al.
patent: 07253705 (1995-10-01), None

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