Patent ID: 7063929

Claim:
A method for preparing a toner comprising the steps of: preparing a toner composition containing a binder resin; and kneading the toner composition through processes in which two opposing rolls capable of heating or cooling that are rotated in different directions are used, a temperature difference being provided between roll temperature of one of the rolls (RL 1 ) and roll temperature of the other roll (RL 2 ), and the roll (RL 1 ) and the roll (RL 2 ) are rotated at mutually different peripheral speeds, wherein said one of the rolls (RL 1 ) is provided with a temperature difference between the front-half portion and the rear-half portion thereof, and being conducted in a manner so as to satisfy the relationship: Tg/ 2≦ Trj 1− Tr 2 wherein Trj 1 represents roll temperature of the front-half of the roll (RL 1 ), and Tr 2 represents roll temperature of the roll (RL 2 ), and Tg represents glass transition temperature of the binder resin.