Apparatus for controlling toner density in a developing device o

Details Apparatus for controlling toner density in a developing device o Apparatus for controlling toner density in a developing device o

1991-05-14

1993-06-01

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118653, 118691, 355208, G03G 1508

Patent

active

052164691

ABSTRACT:
A developing device in an image forming apparatus has a developing sleeve through which a two-component toner material is applied onto a photosensitive surface. The developing device has an optical sensor assembly including a sensor casing opening towards the developing sleeve and closed by a transparent electroconductive windowpane to which one of two bias voltages is selectively applied for depositing or clearing toner on and off from the windowpane. The sensor assembly also includes an infrared light source for radiating infrared rays of light through the windowpane and a light receiving element for providing an output indicative of the density of toner deposited on the windowpane while the windowpane is electrically connected with the bias voltage source. A central processing unit operates in response to the output from the light receiving element to calculate the density of toner contained in the developing material. Any change in density of the toner in the developing material can be compensated for.

REFERENCES:
patent: 4550998 (1985-11-01), Nishikawa
patent: 4551002 (1985-11-01), Aoki et al.
patent: 4582415 (1986-04-01), Hyodo et al.
patent: 4804996 (1989-02-01), Snelling
patent: 4883019 (1989-11-01), Menjo et al.
patent: 4901115 (1990-02-01), Nakamura et al.
patent: 5036358 (1991-07-01), Yoshida

Affiliated with

Also associated with

Rating

Apparatus for controlling toner density in a developing device o does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for controlling toner density in a developing device o, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for controlling toner density in a developing device o will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1818464