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    • 2. 发明申请
    • VACUUM TIMING DEVICE AND METHOD FOR PRODUCING THE SAME
    • 真空定时装置及其制造方法
    • WO0218252A8
    • 2002-07-11
    • PCT/US0141949
    • 2001-08-30
    • BRETTING C G MFG CO INCCOUTURIER DENNIS P
    • COUTURIER DENNIS P
    • B65H20/12B65H27/00B65H20/00
    • B65H20/12B65H27/00B65H2404/1362B65H2406/332B65H2406/3612
    • A vacuum timing device (100) for applying a vacuum on a roll (114). The vacuum timing device (100) includes a roll (114) with an axis of rotation (118), a surface (122) and a surface longitudinal axis (178) oriented in a direction substantially parallel to the axis of rotation (118). The device (100) also includes at least one vacuum line (150) running along at least a portion of the length of the roll (114). The device also includes a plurality of apertures (130) defined in a surface of the roll (114) and in fluid communication with the vacuum line (150). In order to alleviate angular delay of vacuum propagation, the plurality of apertures (130) are arranged in a line that is skewed away with respect to the surface longitudinal axis (178). Preferably, the plurality of apertures (130) is arranged in a line that is skewed away from the direction of rotation of the roll (114), thereby substantially eliminating the angular propagation delay as the vacuum roll operates.
    • 一种用于在辊(114)上施加真空的真空定时装置(100)。 真空定时装置(100)包括具有旋转轴线(118)的辊(114),在基本上平行于旋转轴线(118)的方向上定向的表面(122)和表面纵向轴线(178)。 装置(100)还包括至少一个沿着辊(114)的长度的至少一部分延伸的真空管线(150)。 该装置还包括限定在辊(114)的表面中并与真空管线(150)流体连通的多个孔(130)。 为了减轻真空传播的角度延迟,多个孔(130)被布置成相对于表面纵向轴线178倾斜的直线。 优选地,多个孔(130)布置成远离辊(114)的旋转方向偏斜的线,从而基本上消除了真空辊操作时的角度传播延迟。