Patent ID: 8311430
Filing Date: 2012-11-13
Classification: G03G

Abstract:
1. A transfer device comprising: a transfer section which forms a nip portion between the transfer section and an image carrier and transfers a toner image on an image carrier onto a sheet passing through the nip portion; an application section which applies a voltage to the transfer section; a determining section which comprises an adjusting section for adjusting a parameter for adjusting a timing of applying voltage from the application section to the transfer section and determines the timing in accordance with the parameter; and a control section which controls 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 until the timing determined by the determination section in a period 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, at a timing determined by the determining section, switch to apply a voltage having the transfer polarity from the voltage having the opposite polarity to the transfer section while the non image area of the sheet passes through the nip portion.