Patent ID: 7116920

Claim:
A printing apparatus including a plurality of image forming sections that are removably attached to a body of the printing apparatus, each one of the image forming sections being capable of forming an image of a respective color independently from the other image forming sections; the printing apparatus comprising: a plurality of transfer sections each of which opposes a corresponding one of the plurality of image forming sections; a transporting section that transports a recording medium through the plurality of image forming sections; a power supply that supplies a transfer voltage to said plurality of transfer sections; a specifying unit that specifies an image forming section that performs printing; a control unit that controls the image forming section specified by said specifying unit to operate to form an image of a corresponding color, said control section controlling said power supplying section in such a way that said power supplying section supplies the transfer voltage not only to a transfer section corresponding to the image forming section specified by said specifying unit but also to a transfer section corresponding to an image forming section not specified by said specifying unit.