Patent ID: 6859630

Claim:
An image transferring and recording medium conveying device comprising: a belt forming a nip for image transfer between said belt and an image carrier for conveying a recording medium via said nip to thereby transfer a toner image formed on said image carrier to said recording medium; bias applying means for applying a bias for image transfer to said nip; control means for controlling said bias applying means, wherein assuming that a leading edge transfer bias Tb is applied during a leading edge interval in which a leading edge portion of the recording medium between a leading edge and a preselected position in a direction of medium conveyance moves away from said nip, and that a remaining interval transfer bias Ta is applied to said nip during a remaining interval in which a remaining portion of said recording medium moves away from said nip, said control means switches said leading edge transfer bias Tb within a range lower than said remaining interval transfer bias Ta, and wherein a between-medium transfer bias Tc is applied when neither one of said remaining interval transfer bias Ta and said leading edge transfer bias Tb is applied, and said control means switches said between-medium transfer bias Tc within a range lower than said leading edge transfer bias Tb.