Patent ID: 7358019
Filing Date: 2008-04-15
Classification: G03G

Abstract:
1. A developing process comprising the steps of: negatively charging toner particles supported on a developer carrier by regulating with a regulating member under pressure so as to obtain negatively charged toner particles; and providing the negatively charged toner particles to an electrostatic latent image formed on an image carrier so as to visualize the latent image as a toner image, wherein, the negatively charged toner particles satisfy formulas (3), (4) and (5) shown below, when being measured by the laser doppler method in an oscillation field in an acoustic alleviation cell to determine individual particle size and charged amount thereof: wherein A [μm] represents the center value in the particle size distribution; B [fC] represents the width of the charged amount distribution therein; Bmax [fC] represents the maximum value of the charged amount therein; and Bmin [fC] represents the minimum value of the charged amount therein.