Developability regulating apparatus

Details Developability regulating apparatus Developability regulating apparatus

1976-05-03

1977-08-23

Stein, Mervin

Coating apparatus

With vacuum or fluid pressure chamber

118646, 222DIG1, 250573, G03G 1508

Patent

active

040432939

ABSTRACT:
An apparatus which regulates the developability characteristics of a development system employing a developer mixture comprising at least carrier granules and toner particles. A transparent electrode attracts toner particles from the carrier granules. Light rays are transmitted through the electrode with the particles thereon. Sensors having peak transmittances corresponding to the peak transmittance and absorbence of the toner particles, detect the intensity of the light rays transmitted through the electrode and generate electrical output signals indicative thereof. These signals are processed and a control signal is developed which regulates the dispensing of additional toner particles into the developer mixture. In this manner, the concentration of toner particles within the developer mix is adjusted.

REFERENCES:
patent: 3430606 (1969-03-01), Pease et al.
patent: 3526338 (1970-09-01), Goodrich et al.
patent: 3604939 (1971-09-01), Maksymiak
patent: 3635373 (1972-01-01), Kuhl et al.
patent: 3727065 (1973-04-01), Maksymiak
patent: 3777173 (1973-12-01), Landrith
patent: 3791744 (1974-02-01), Erny et al.
patent: 3854449 (1974-12-01), Davidson

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