US 7,459,256 B2Granted

Image forming method and image forming apparatus

AssigneeKonica Minolta Business Technologies, Inc.

InventorsAkihiko Itami, Kunio Shigeta, Shigeaki Tokutake

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Abstract

There are described an image forming method and apparatus, which enable to form an electrophotographic image having high image density and excellent color reproducibility. The method includes: applying a uniform surface potential to an organic photoreceptor; irradiating light, having a wavelength in a range of 350-500 nm, on the photoreceptor, to form a latent image on the photoreceptor; and contacting a developing blush, containing toner and carrier, with the organic photoreceptor so as to form a visible toner image. The developing sleeve bears developing agent including the toner and the carrier. An absolute value of an electric charge potential of non-exposed area on the organic photoreceptor is in a range of 250-450 Volts and the developing sleeve is rotated in a counter direction, being counter to a rotating direction of the organic photoreceptor.

Claims14

Dependent claims

A method for forming an image, comprising:

applying a uniform surface potential to an organic photoreceptor by a charging device;
irradiating light having a wavelength in a range of 350 to 500 nm and emitted from a semiconductor laser or a light emitting diode which is equipped in an exposed device, on said photoreceptor, to form a latent image;
and
contacting a developing blush, which is formed on a developing sleeve and contains toner and carrier, with said photoreceptor having said latent image so as to form a visible toner image, wherein said developing sleeve is equipped in a developing device;
wherein an absolute value of an electric charge potential of a non-exposed area residing on said organic photoreceptor is in a range of 250 to 450 Volts at an exposing position of said exposing device;
and
wherein said developing sleeve is rotated in a counter direction, being counter to a rotating direction of said organic photoreceptor.

4 more elements

Dependencies are inferred from the claim text.