Image forming device and color misregistration correction...

Details Image forming device and color misregistration correction... Image forming device and color misregistration correction...

2007-07-03

2007-07-03

Gray, David M. (Department: 2852)

Electrophotography

Image formation

Transfer

C399S301000, C399S302000

Reexamination Certificate

active

10924766

ABSTRACT:
An image forming device and a color misregistration correction method allow for stable formation of excellent images with little color misregistration. A reference patch image is formed on a reference photosensitive drum3, and transferred to a transfer belt7. A correction patch image is formed on a correction-target photosensitive drum3, and transferred onto the reference patch image by superimposition. A registration detecting sensor21detects a density average value of the reference patch image and the correction patch image. Based on the density average value, a correction value for controlling the correction-target photosensitive drum3is calculated, and rotational phase control is performed in accordance with the correction value.

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