Image forming apparatus having contact charger

Details Image forming apparatus having contact charger Image forming apparatus having contact charger

1995-11-07

1996-11-19

Smith, Matthew S.

Photocopying

Contact printing

Light boxes

347248, 355211, G03G 1502

Patent

active

055768083

ABSTRACT:
An image forming apparatus includes a charging member in contact with a photosensitive member for applying a charging voltage at least containing an a.c. component, a laser beam irradiator having a polygon mirror to form an electrostatic latent image and a developing unit for developing the latent image into a visible image and collecting residual developer remaining on the surface of the photosensitive member after the visual image is transferred to a transfer material. The number of revolutions Fp(rps) of the irradiator polygon mirror, the frequency Fb(Hz) of the a.c. component to be applied to the contact charging unit and the system velocity Vp(cm/sec) have a correlation so determined as to meet the requirement of:

REFERENCES:
patent: 5148219 (1992-09-01), Kohyama
patent: 5221946 (1993-06-01), Kohyama

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