Image forming apparatus supplied with controllable bias voltage

An image fixing apparatus for fixing a toner image on a recording material, comprising:

• a rotatable fixing member for forming with a back-up rotatable member a nip through which a recording material carrying a toner image is passed to fix the toner image on the recording material;
• a bias voltage source for applying a bias voltage to said rotatable member;
• and
• impedance means for dividing the bias voltage and applying the divided voltage to said rotatably fixing member.