Image forming apparatus for forming an image on an image bearing

Details Image forming apparatus for forming an image on an image bearing Image forming apparatus for forming an image on an image bearing

1992-06-18

1994-05-24

Picard, Leo P.

Photocopying

Contact printing

Light boxes

355208, G03G 2100

Patent

active

053153529

ABSTRACT:
An image forming apparatus, in accordance with the present invention, forms a color image on an image bearing member. The image forming apparatus includes a charging device for electrically charging the image bearing member, an exposing device for exposing a light beam on the image bearing member so as to form a latent image on the charged image bearing member corresponding to image data to be formed, and a developing device for developing the latent image formed on the image bearing member with a developing agent including toner. The image forming apparatus also includes a detecting device for detecting the amount of toner attached to the image bearing member by the developing device, an estimating device for estimating the amount of toner attached to the image bearing member in accordance with image data to be formed, and a control device for controlling the charging device, the exposing device and the developing device in accordance with the detected toner attaching amount and the estimated toner attaching amount so as to stabilize image density changes of the image formed on the image bearing member. Thereby, the image forming apparatus of the present invention can correct for image density variations due to a change in the operating environment or a deterioration over time independently of the conventional maintenance of image forming materials and processes, and forms an image having a stable high image density.

REFERENCES:
patent: 4708459 (1987-11-01), Cowan et al.
patent: 4780744 (1988-10-01), Porter et al.
patent: 4908666 (1990-03-01), Resch, III
patent: 4910557 (1990-03-01), Imai
patent: 5081491 (1992-01-01), Lux et al.
patent: 5150155 (1992-09-01), Rushing
patent: 5175585 (1992-12-01), Matsubayashi et al.

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