Image forming apparatus

In an image forming apparatus of the type comprising developing means, a latent image carrier, and latent image forming means, wherein a latent image formed on said latent image carrier by said latent image forming means is developed by said developing means to form an image,

• the improvement wherein said developing means applies an AC-superimposed bias voltage to a developer carrier to form a thin developer layer with a line-shaped uneven conveying surface on said developer carrier with a regulating member, and said latent image forming means forms a latent image on said latent image carrier by performing image processing using a vertical parallel-line screen.

In an image forming apparatus of the type comprising developing means, a latent image carrier, and latent image forming means, wherein a latent image formed on said latent image carrier by said latent image forming means is developed by said developing means to form an image,

• the improvement wherein said developing means applies an AC-superimposed bias voltage to a developer carrier to form a thin developer layer with a line-shaped uneven conveying surface on said developer carrier with a regulating member, and said latent image forming means forms a latent image on said latent image carrier by performing image processing using a screen structure for reproducing a halftone image, and
• wherein a pitch of said line-shaped uneven conveying surface is set so as not to be an integral multiple of a dot pitch in a feed direction of said screen nor an integral quotient of said dot pitch.

In an image forming apparatus of the type comprising developing means, a latent image carrier, and latent image forming means, wherein a latent image formed on said latent image carrier by said latent image forming means is developed by said developing means to form an image,

• the improvement wherein said developing means applies an AC-superimposed bias voltage to a developer carrier to form a thin developer layer with a line-shaped uneven conveying surface on said developer carrier with a regulating member, and
• wherein a frequency of said AC-superimposed bias voltage is set so as not to be an integral multiple of a frequency of lateral unevenness occurring in a feed direction nor an integral quotient of the frequency of said lateral unevenness.

In an image forming apparatus of the type comprising developing means, a latent image carrier, and latent image forming means, wherein a latent image formed on said latent image carrier by said latent image forming means is developed by said developing means to form an image,

• the improvement wherein said developing means applies an AC-superimposed bias voltage to a developer carrier to form a thin developer layer with a line-shaped uneven conveying surface on said developer carrier with a regulating member, and
• wherein a pitch of said line-shaped uneven conveying surface is set so as not to be an integral multiple of a pitch of stripes occurring in a feed direction nor an integral quotient of the pitch of said stripes.