Image forming system

Details Image forming system Image forming system

1990-10-15

1991-11-12

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355219, G03G 2100

Patent

active

050651870

ABSTRACT:
In an image forming system employing a photosensitive drum on which an electrostatic latent image is formed, and a toner image bearing belt on which a toner image corresponding to the electrostatic latent image is formed by means of a developing device, a discharging device, such as an AC corona discharger, is provied to face the toner image bearing belt superimposed on the photosensitive drum, at a location downstream of the developing area. The surface charges on the toner image bearing member are therefore removed before or when the toner image bearing member separates from the photosensitive drum. As a result, the increase of the potential difference across the air layer due to the decrease of the capacitance of the air layer between the toner image bearing member and the photosensitive drum is prevented, and electrical discharge through the air layer, and attendant scattering of the toner image are thereby avoided.

REFERENCES:
patent: 3722992 (1973-03-01), Zweig
patent: 3751157 (1973-08-01), Johnson
patent: 3778841 (1973-12-01), Gundlach et al.
patent: 3924945 (1975-12-01), Weigl
patent: 3937572 (1976-02-01), Gaynor et al.
patent: 3950680 (1976-04-01), Michaels et al.
patent: 4734359 (1988-03-01), Oguchi et al.
patent: 4760410 (1988-07-01), Kishi
patent: 4853736 (1989-08-01), Goto et al.

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