Image heating apparatus

An image heating apparatus configured to heat an image formed on a recording material, the image heating apparatus comprising:

• a cylindrical rotatable member including a conductive layer;
• a coil including a helically shaped portion which is helically wound in a generatrix direction of the rotatable member inside the rotatable member, the coil being configured to produce an alternating magnetic field for causing the conductive layer to generate heat by electromagnetic induction;
• and
• a magnetic core disposed inside the helically shaped portion, the magnetic core being shaped so as not to form a loop outside the rotatable member,
• wherein the magnetic core includes divided cores in which the magnetic core is divided into two pieces having equal lengths in the generatrix direction, and
• wherein a position of a boundary between the divided cores is substantially coinciding with a central position of the rotatable member in the generatrix direction.

An image heating apparatus configured to heat an image formed on a recording material, the image heating apparatus comprising:

• a cylindrical rotatable member including a conductive layer;
• a coil including a helically shaped portion which is helically wound in a generatrix direction of the rotatable member inside the rotatable member, the coil being configured to produce an alternating magnetic field for causing the conductive layer to generate heat by electromagnetic induction;
• and
• a magnetic core disposed inside the helically shaped portion, the magnetic core being shaped so as not to form a loop outside the rotatable member,
• wherein the magnetic core includes divided cores in which the magnetic core is divided into two pieces having equal lengths in the generatrix direction, and
• wherein a position of a boundary between the divided cores is substantially coinciding with a central position of a region of the rotatable member which the recording material passes through, with respect to the generatrix direction.