Developing apparatus using non-magnetic spherical toner particles

In an apparatus for developing an image by using spherical non-magnetic toner particles, the improvements comprising:

• a latent image carrier on which a latent image is formed by a potential contrast;
• a toner transporting means having a surface for transporting the spherical non-magnetic spherical toner particles to the latent image carrier ;
• and
• a toner regulating means for passing the toner particles transported by the toner transporting means through a gap between the surface of the toner transporting means and a surface of the toner regulating means, thereby forming a thin toner layer which is charged,
• wherein the toner transporting means develops an electrostatic latent image formed on the latent image carrier with the thin toner layer which is charged,
• wherein roughnesses of the surfaces of the toner regulating means and of the toner transporting means are different from each other, and
• wherein the spherical non-magnetic toner particles are rotated between the toner regulating means and the toner transporting means and charged electrostacially.