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    • 10. 发明专利
    • Image forming apparatus
    • JP4438484B2
    • 2010-03-24
    • JP2004111527
    • 2004-04-05
    • 富士ゼロックス株式会社
    • 進 木林厚 袴田治之 難波
    • G03G15/00G03G15/01G03G21/14H04N1/04H04N1/113
    • PROBLEM TO BE SOLVED: To easily obtain the skew amount showing the inclination of an image formed on an image carrier in the axial direction of the image carrier. SOLUTION: A linear image pattern formed from one end to the other end in the axial direction Z of the image carrier 20 long in the main scanning direction on the image carrier 20 is scanned and exposed, and the pattern image formed on the image carrier 20 is transferred to an intermediate transfer body 24 by a transfer device 26. The pulse width of detection waveform, showing the change of a current value flowing between the transfer device 26 and the image carrier 20 at such a transfer time, that is, the difference between the time from starting the transfer of the pattern image until finishing it and the time from starting the transfer of the previously stored pattern image, in a state where there exists no inclination of the pattern image with respect to the axial direction Z of the image carrier 20 until finishing it, is obtained as the skew amount, showing the inclination to the axial direction of the image carrier. Namely, the skew amount showing the inclination of the formed image to the axial direction of the image carrier 20 for every image carrier 20 is obtained. COPYRIGHT: (C)2006,JPO&NCIPI