Image forming apparatus having charging means
First Claim
1. An image forming apparatus, comprising:
- a movable image bearing member;
charging means for charging said image bearing member while it is moving, said charging means including a contact member contactable to said image bearing member and voltage application means for applying a vibratory voltage between said contact member and said image bearing member;
latent image forming means for forming a latent image along a scanning line on said image bearing member charged by said charging means, the latent image being developed and transferred onto a transfer material,wherein a frequency f of the vibratory voltage and a speed Vp of the movement of said 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 λ
sp where λ
sp=Vp/f.
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Accused Products
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 λsp where λsp=Vp/f.
17 Citations
20 Claims
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1. An image forming apparatus, comprising:
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a movable image bearing member; charging means for charging said image bearing member while it is moving, said charging means including a contact member contactable to said image bearing member and voltage application means for applying a vibratory voltage between said contact member and said image bearing member; latent image forming means for forming a latent image along a scanning line on said image bearing member charged by said charging means, the latent image being developed and transferred onto a transfer material, wherein a frequency f of the vibratory voltage and a speed Vp of the movement of said 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 λ
sp where λ
sp=Vp/f. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An image forming apparatus, comprising:
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a movable image bearing member; charging means for charging said image bearing member, said charging means including a contact member contactable to said image bearing member and voltage applying means for applying a vibratory voltage between the contact member and said image bearing member; latent image forming means for forming a latent image along a scanning line on said image bearing member charged by said charging means, the latent image being developed and transferred onto a transfer material; wherein a frequency f of the vibratory voltage and a speed Vp of the movement of said image bearing member are so selected that a variation range of a spatial wavelength λ
sp=Vp/f does not overlap the result of (n+m)d multiplied by N or 1/N,where n is the number of scanned lines, m is the number of non-scanned lines, and d is a diameter of one dot of the image. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification