Toner classification apparatus and a toner production method

A toner classification apparatus comprising a classification rotor, wherein

• the classification rotor comprises a plurality of vanes extending from a side of a center of rotation of the classification rotor to an outer circumference side of the classification rotor;
• the plurality of vanes are disposed with prescribed gaps established between the vanes;
• the gaps form an opening connecting a region of the center of rotation of the classification rotor;
• the plurality of vanes comprise a first vane group containing first vanes and a second vane group containing second vanes, the second vanes have a length shorter than the first vanes;
• the first vanes have substantially the same vane length, and are disposed with gaps established between the first vanes,
• each of the first vanes draws first trajectory when the classification rotor rotates, first trajectories drawn by the first vanes are substantially same;
• the second vanes have substantially the same vane length, and are disposed with gaps established between the second vanes,
• each of the second vanes draws second trajectory when the classification rotor rotates, second trajectories drawn by the second vanes are substantially same;
• the number of second vanes, which are disposed between two adjacent first vanes, is 1 to 2, independently;
• a distance from the center of rotation to an outer circumference side end of the first trajectory is defined as L1 for the first trajectory, and
• a distance from the center of rotation to the center side end of the first trajectory is defined as L2,
• a distance from the center of rotation to an outer circumference side end of the second trajectory is defined as L3 for the second trajectory, and
• a distance from the center of rotation to the center side end of the second trajectory is defined as L4,
• L1 to L4 satisfy the following relationships:
• 0.25≤(L3−L4)/(L1−L2)≤0.50
• 0.95≤L3/L1≤1.05.