JP2007264302A5 - - Google Patents

Claims (5)

An image forming apparatus,
An image forming unit that forms a toner image with a plurality of colors of toner on the image carrier;
To the image forming unit, a first timing of a plurality of timings that correspond to between the toner image formed on a recording material a toner image formed on the subsequent recording material preceding in said image bearing member A control unit for forming a resist pattern with each of the plurality of color toners ;
A detection unit for detecting a shift amount of a resist pattern on the image carrier;
On the basis of the detected Ruzure amount by the detecting unit, an image forming apparatus which comprises a correction unit for correcting the amount of deviation in the second different timing from the first timing. The first timing is:
2. The image forming apparatus according to claim 1, wherein the toner image formed by the image forming unit reaches a predetermined number of times. A determination unit determining a second timing based on the timing has been reached to the number of times the number of detected displacement amount detected by the detection unit is a predetermined,
The correction unit,
The image forming apparatus according to claim 2, wherein the shift amount is corrected based on an average value of the shift amounts at a second timing determined by the determination unit. From the resist pattern formed between the detection is performed in the first timing, newly a determination unit configured to determine the second timing from the timing of one of before the toner image is formed by a specified number of further The image forming apparatus according to claim 2, further comprising: An image forming apparatus control method comprising:
An image forming step of forming a toner image with a plurality of colors of toner on the image carrier;
In the image forming step, the first of the plurality of timings that correspond to between the toner image formed on a recording material and a subsequent toner image formed on the recording material prior formed on the image bearing member A control step of forming a resist pattern with each of the plurality of color toners at one timing;
A detection step of detecting a shift amount of the resist pattern that will be formed in the image forming step,
Control method on the basis of the said shift amount that will be detected Oite the detection step, characterized in that it comprises a step of correcting said shift amounts in different second timing from the first timing.