Medium holding apparatus, inkjet image forming apparatus and inkjet image forming method

An inkjet image forming apparatus comprising:

• an endless device configured to rotate at a predetermined circumferential speed;
• a charging member arranged to be opposed to a surface of the endless device and configured to apply a voltage to a medium and attract the medium to the endless device using electrostatic force;
• an inkjet head configured to eject, on the basis of image information, ink to the medium attracted to the endless device;
• a charge removing member arranged to be opposed to the surface of the endless device and configured to discharge charges in the medium using an alternating voltage;
• and
• a controller configured to offset a reference voltage of the alternating voltage to a polarity opposite to polarity of the voltage applied during the attraction.

An image forming method for an inkjet image forming apparatus, comprising:

• rotating an endless device at a predetermined circumferential speed;
• applying a voltage to a medium with a charging member and attracting the medium to the endless device using electrostatic force;
• ejecting, on the basis of image information, ink to the medium attracted to the endless device;
• discharging charges in the medium with a charge removing member using an alternating voltage;
• peeling the medium, from which the charges are discharged, with a peeling member;
• and
• offsetting a reference voltage of the alternating voltage to a polarity opposite to polarity of the voltage applied during the attraction.