Image forming apparatus with image density adjustment

Details Image forming apparatus with image density adjustment Image forming apparatus with image density adjustment

1992-11-05

1995-10-03

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355207, 355214, 355219, 355246, G03G 2100, G03G 1502

Patent

active

054556570

ABSTRACT:
An image forming apparatus includes an electrophotographic photosensitive member; a charger for charging the photosensitive member; an exposure device for exposing the photosensitive member to light information with a controllable amount of light to form an electrostatic latent image with a controlled image density; a developing device for developing the electrostatic latent image with toner; an image fixing device for heat-fixing the toner image; a detector for detecting, in effect, electric power consumed by the image forming apparatus in operation; a power supply controller for controlling electric power supply to the apparatus without changing electric power supply to the fixing device and without increasing electric power supply to the exposure device; an image density adjusting device for adjusting image density without changing the light amount of the exposure device; wherein when the detector detects the power consumption beyond a predetermined level, the electric power supply to the exposure device is reduced or is maintained constant and the image density adjusting device is operated, without changing the electric power supply to the fixing device, so as to adjust the density of the image.

REFERENCES:
patent: 4603245 (1986-07-01), Yagasaki
patent: 5083167 (1992-01-01), Fukushima et al.
patent: 5128717 (1992-07-01), Uchikawa et al.

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