Patent ID: 6673506
Filing Date: 2004-01-06
Classification: G03G

Abstract:
A toner production process comprising the steps of:melt-kneading a mixture containing at least a binder resin and a colorant to obtain a kneaded product; cooling the kneaded product to obtain a cooled product; crushing the cooled product to obtain a crushed product; pulverizing a powder material comprising the crushed product, by means of a grinding means to obtain a pulverized product; and classifying the pulverized product by a classifying means; wherein; said grinding means comprises a mechanical grinding machine having at least a rotor which is a rotator attached to the center rotating shaft and a stator which is provided around the rotor, and keeping a constant gap between the stator and the rotor surface; and the surface of at least one of the rotor and the stator is coated by a plating of a chromium alloy containing at least chromium carbide.