Transfer device, image forming apparatus and control method of transfer device

摘要

A transfer device includes: a transfer section for transferring a toner image on an image carrier onto a sheet passing through a nip portion which is formed between the transfer section and the image carrier; an application section for applying a voltage to the transfer section; and a control section for controlling the application section, wherein the control section controls the application section to apply a voltage having an opposite polarity to a transfer polarity to the transfer section since a leading edge of the sheet in a conveyance direction advances into the nip portion until a predetermined non image area of the sheet has passed through the nip portion, and then switch to apply a voltage having the transfer polarity from the voltage having the opposite polarity to the transfer section while a non image area of the sheet passes through the nip portion.