Belt type image forming apparatus and method that detects a...

Details Belt type image forming apparatus and method that detects a... Belt type image forming apparatus and method that detects a...

2005-01-11

2005-01-11

Tran, Hoan (Department: 2852)

Electrophotography

Image formation

Transfer

30

Reexamination Certificate

active

06842601

ABSTRACT:
A full-color image forming apparatus forms a full-color image using a color-matching pattern of color components formed on an intermediate transfer belt. The image forming apparatus includes at least one pattern detection sensor that detects the color-matching pattern and generates pattern detection signals. A seam mark-detecting sensor detects a seam mark formed on the intermediate transfer belt and generates seam mark detection signals. The seam mark-detecting sensor is aligned with the pattern detection sensor on a same axis extending vertically relative to a traveling direction of the intermediate transfer belt. A memory stores digital signals converted from the pattern detection and seam mark detection signals. A seam mark detection signal deleting device deletes a prescribed seam mark detection signal from the pattern detection signals when the pattern detection signal and the prescribed seam mark detection signal occur simultaneously. A controlling device controls the image forming apparatus in accordance with the pattern detection and seam mark detection signals excluding the prescribed seam mark detection signal.

REFERENCES:
patent: 4657369 (1987-04-01), Takeuchi
patent: 6363228 (2002-03-01), Ream
patent: 6456310 (2002-09-01), Wallace et al.
patent: 6493011 (2002-12-01), Shioya
Patent Abstracts of Japan, JP 2001-312116, Nov. 9, 2001.
Patent Abstracts of Japan, JP 2001-265085, Sep. 28, 2001.

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