Image forming apparatus

Details Image forming apparatus Image forming apparatus

1994-02-25

1995-04-18

Grimley, A. T.

Photocopying

Contact printing

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355210, 355215, 430 49, 430 56, 430133, G03G 2100

Patent

active

054082986

ABSTRACT:
The image forming apparatus in this invention uses a positive corona discharger as a main charger. A photosensitive material having a charge accepting ability per run-off current of at least 40 V/.mu.A from a corona discharger (measured by using a discharge length of 230 mm and by taking the peripheral speed of the photosensitive material as 48 mm/sec) is used, and a DC voltage is impressed on the positive corona discharger so that the average ozone concentration of an atmosphere of the photosensitive material 2 ppm or less and the ozone concentration immediately below the corona discharger becomes 5 ppm or less to perform main charging. According to this apparatus, the amount generated of ozone can be decreased, and charging unevenness can be prevented to form a good image.

REFERENCES:
patent: 4363711 (1982-12-01), Kuehnle
patent: 5324610 (1994-06-01), Tanaka et al.
patent: 5336576 (1994-08-01), Miyamoto et al.
patent: 5339138 (1994-08-01), Mishima et al.

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