Image forming apparatus and control method of image forming...

Details Image forming apparatus and control method of image forming... Image forming apparatus and control method of image forming...

2009-09-18

2010-10-19

Porta, David P (Department: 2884)

Electrophotography

Image formation

Transfer

C399S049000, C399S072000, C347S116000

Reexamination Certificate

active

07817948

ABSTRACT:
This invention enables an image forming apparatus to perform highly precise misregistration detection without causing increased downtime or increased cost. For this, the image forming apparatus according to the invention comprises a detection unit for detecting a misregistration detection pattern formed on an endless belt. The employed misregistration detection pattern includes a first pattern array formed with a misregistration detection color or a reference position color, and a second pattern array formed with a misregistration detection color or a reference position color. The misregistration detection pattern is configured in a way that the first pattern and the second pattern have different shapes, and that the color order of the first patterns in the first pattern array and the color order of the second patterns in the second pattern array are different.

REFERENCES:
patent: 2002/0054200 (2002-05-01), Hayakawa
patent: 2001-356542 (2001-12-01), None
patent: 2002-23445 (2002-01-01), None

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