Image forming apparatus having charging means

Details Image forming apparatus having charging means Image forming apparatus having charging means

1990-09-11

1992-09-08

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

346160, 361225, G03G 1502

Patent

active

051462818

ABSTRACT:
An image forming apparatus for forming images comprises a movable image bearing member and charger for charging the image bearing member while it is moving. The charger includes a contact member contactable to the image bearing member and a voltage applicator for applying a vibratory voltage between the contact member and the image bearing member. A latent image former is provided for forming a latent image along a scanning line on the image bearing member charged by the charger whereby the latent image is developed and transferred onto a transfer material, wherein a frequency f of the vibratory voltage and a speed Vp of the movement of the image bearing member are so selected that an interval between adjacent scanning lines multiplied by N or 1/N does not fall within a variation range of a spatial wavelength .lambda.sp where .lambda.sp=Vp/f.

REFERENCES:
patent: 4727453 (1988-02-01), Ewing
patent: 4851960 (1989-07-01), Nakamura et al.

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