Image forming apparatus with different pressing forces between image carriers and developer carriers

Abstract

Various methods, devices and techniques for improving image quality for an image forming device are disclosed. For example, improved image quality can be had for an image forming apparatus having a first image forming unit including a first image carrier and a first developer carrier in contact with the first image carrier at a first pressure, and the first image carrier carries a first developer having a first charging characteristic, and a second image forming unit including a second image carrier, and a second developer carrier in contact with the second image carrier at a second pressure, greater than the first pressure, and the second developer carrier carries a second developer having a second charging characteristic. The first pressure and the second pressure are preset based on the first charging characteristic and the second charging characteristic.

Dependencies are inferred from the claim text.