Image forming apparatus

An image forming apparatus comprising:

• a fixing device including:
• a rotatable fixing belt configured to be grounded via a first grounding path from the fixing belt to a ground, the first grounding path including a protective resistor;
• a heater configured to be in contact with an inner circumferential surface of the fixing belt;
• and
• a pressure rotator facing the fixing belt to form a fixing nip, the pressure rotator configured to be grounded via a second grounding path;
• a power supply configured to apply an alternating current voltage to the heater;
• and
• a transfer device upstream from the fixing device in a recording medium conveyance direction of a recording medium,
• the transfer device including:
• a rotatable transferor configured to be grounded via a third grounding path;
• and
• an opposed rotator facing the transferor to form a transfer nip,
• the transferor having a transferor resistance satisfying a following expression,
• ❘
• "\[LeftBracketingBar]"
• Rf
• _
• jXs
• +
• Rp
• +
• Rt
• _
• jXh
• +
• Rf
• _
• jXs
• +
• Rp
• +
• Rt
• _
• ·
• Rt
• jXs
• +
• Rp
• +
• Rt
• ❘
• "\[RightBracketingBar]"
• <
• 0.3
• where Rt is a resistance value of the transferor resistance, Rf is a grounding resistance value of the protective resistor, Rp is a resistance value of the recording medium, jXs is an impedance of the fixing belt, and jXh is an impedance of the heater.