Image forming apparatus

Abstract

An image forming apparatus is capable of printing a position-coding pattern. A first print engine prints a position-coding pattern and holds a first developer material therein. A plurality of second print engines each print a corresponding image in accordance with print data, the image being different from the position-coding pattern, each of the second print engines holding a corresponding second developer material therein. The first developer material is charged to a first average amount of charge and has a first distribution of amount of charge. The second developer material is charged to a second average amount of charge and has a second distribution of amount of charge, such that the first average amount of charge is larger than the second average amount of charge, and that the first distribution of amount of charge has a smaller standard deviation than the second distribution of amount of charge.

Dependencies are inferred from the claim text.