US 2004/0001725 A1 · Image forming apparatus

Abstract

An image to be formed on paper (26) is held on the surface of photo-sensitive drum (1). This is a latent image of static electricity formed by an LED exposer (5). Then, the developing roller (7) puts toner on the surface of photo sensitive drum (1), so as to develop a toner image. Meanwhile, the toner conveying roller (9) supplies toner to the developing roller (7). In this occasion, the printer controller (17) calculates the image density of image data (18) with dot counter (13). And, it decides the first voltage impressed to developing roller (7) by developing bias source (8) as well as the second voltage impressed to toner conveying roller (9) by stretching bias source (10) according to the image density of original image.

Claims10

Dependent claims

An image forming apparatus comprising

a developing means of putting developing material to sticking to an image holder, so as to form an image corresponding to an image data,
a developing material supplying means of supplying said developing material to said developing means,
a first electricity source for impressing said developing means with a first voltage,
a second electricity source for impressing said developing material supplying means with a second voltage,
an image density detecting means of detecting image density from said image data, and
a controller for controlling each supply of said first electricity source and said second electricity source according to said image density detected by said image density detecting means.

3 more elements

Dependencies are inferred from the claim text.

Image forming apparatus

Life of this patent

Image forming apparatus

Life of this patent

Abstract

Claims10