Patent ID: 6792222
Filing Date: 2004-09-14
Classification: G03G

Abstract:
An image formation apparatus comprising:an image holder having a surface; a latent image formation unit that forms an electrostatic latent image on the surface of the image holder; a developing unit that develops the electrostatic latent image by using a charged toner; an image-receiving unit to which a toner image on the image holder is to be transferred; and a transferring unit that applies a transfer bias to the image-receiving unit to transfer the toner image onto the image-receiving unit, wherein an amount of the transfer bias is set such that potential differences between surface potentials of an image section and a non-image section of the image holder and a surface potential of the image-receiving unit generate a discharging at the image section and do not generate a discharging at the non-image section, and wherein a surface potential Vt1 of the image-receiving unit is set to satisfy |Viâˆ’Vt1|<Vd, |Vbâˆ’Vt1|>Vd where, Vd represents a potential difference at which a discharging is started between two objects in the environment of forming an image, Vi represents a surface potential of the image section on the image holder, and Vb represents a surface potential of the non-image section on the electrostatic latent image.