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    TIMING WHEEL FOR TONER CARTRIDGE WITH DUAL SPRINGS
    2.
    发明公开
    TIMING WHEEL FOR TONER CARTRIDGE WITH DUAL SPRINGS 有权
    定时轮的碳粉磁带在两次SPRINGS

    公开(公告)号：EP1934563A1

    公开(公告)日：2008-06-25

    申请号：EP06816376.5

    申请日：2006-10-05

    申请人： Clarity Imaging Technologies, Inc.

    发明人： BESSETTE, Lionel, C.

    IPC分类号： G01F23/22 ,  G03G15/08

    CPC分类号： G01F23/226 ,  G03G15/0856 ,  G03G15/0875 ,  G03G2215/0802 ,  G03G2215/0888

    摘要： This invention provides a timing wheel assembly for controlling the timing of toner cartridge operation that is fixedly attached to a shaft of a toner tank agitator and that is operatively connected to a drive gear of a toner cartridge mounted coaxially on the shaft with the timing wheel movable between a first stop and a second stop relative to the drive gear to define rotational “dwell” range having a predetermined arcuate distance with a pair of springs of differing strengths. The first spring, of a first strength (first spring constant) biases the timing wheel against the first stop and the second spring of a second strength (second spring constant) is engaged by the timing wheel at higher resistance levels. In this manner, the first spring ensures that an appropriate dwell and snap-back motion occurs at lower toner levels and the second spring (in combination with the first) provides heavier resistance and stronger rotational resistance/earlier snapback at higher toner levels.