Image heating apparatus with core for guiding magnetic flux and temperature sensor to control power supply

摘要

An image heating apparatus has an endless movable member together with a coil for generating a magnetic flux and a core for guiding the magnetic flux. A backup member for forming a nip with the movable member has associated therewith a temperature detecting device so that power supply to the coil may be controlled on the basis of an output of that temperature detecting device, the core being sandwiched by the coil at a position upstream of the nip with respect to a movement direction of an outer periphery of the movable member and the temperature detecting device being disposed downstream of the nip.