Image forming equipment with depletion detection in an toner end

Details Image forming equipment with depletion detection in an toner end Image forming equipment with depletion detection in an toner end

1994-10-17

1995-12-12

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355245, 355298, G03G 1508, G03G 2110

Patent

active

054754690

ABSTRACT:
Image forming equipment, which includes a developing device for supplying toners to the surface of a photosensitive member and developing a latent image on the surface of the photosensitive member to thereby form a toner image; a cleaning device for removing and collecting residual toners adhered to the surface of the photosensitive member after the toner image formed by the developing device is transferred to paper; a toner delivery device interposed in a closed loop between the developing device and cleaning device for delivering part of the surplus toners that have not been used for development in the development device to the cleaning device and for delivering the residual toners collected by the cleaning device to the developing device; and a toner tank for supplying toners to a toner delivery path R of the toner delivery device, is provided. In the image forming equipment, by providing a detection system for detecting the depletion of the toners with respect to the toner delivery path, the residual quantity of toners can be detected positively without increasing the size of the developing device.

REFERENCES:
patent: 3700328 (1972-10-01), Davidge et al.
patent: 4011835 (1977-03-01), Lewis
patent: 5036358 (1991-07-01), Yoshida

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