Patent ID: 8521065

Claim:
A fuser comprising: a rotational member configured to rotate; a press member configured to press the rotational member, the press member having an axis that is disposed in a common horizontal plane as an axis of the rotational member; an induction-current generator configured to generate induction current in the rotational member; a separator provided on an upper side of the axis of the rotational member and the axis of the press member, configured to separate from the rotational member a leading end of a recording medium that passes through a nip between the rotational member and the press member when a distal end of the separator is in a separating position, and configured to cover an upper side of the nip when the distal end of the separator is moved to an open position; and a heat insulator including a window that allows transmission of an infrared ray, the heat insulator being moveable around the press member.