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    Anti-wrap device for a web press
    1.
    发明授权
    Anti-wrap device for a web press 失效
    卷筒纸印刷机的防缠绕装置

    公开(公告)号：US06298782B1

    公开(公告)日：2001-10-09

    申请号：US09002755

    申请日：1998-01-05

    申请人： Michael Gregory ,  Mark Pavliny ,  Edward Lewandowski ,  William Lawrence ,  Guntis Ozers

    发明人： Michael Gregory ,  Mark Pavliny ,  Edward Lewandowski ,  William Lawrence ,  Guntis Ozers

    IPC分类号： B41F3318

    CPC分类号： B41F33/18 ,  B41F33/00 ,  B41P2233/20 ,  B41P2233/23

    摘要： A system and method for preventing a broken printing web from wrapping about or otherwise fouling the blanket cylinders of printing press units. The system and method includes a web tensioning device located downstream of the printing press units for maintaining tension upon a broken web and pulling the web from the printing press units. The device includes a plurality of web disturbance detectors for detecting a wave, ripple or other disturbance indicative of a web break. A pair of anti-wrap rollers located above and below the web are engaged upon detection of a web break to engage the web between them to exert tension onto the web and pull it from the printing units. The anti-wrap rollers are rotated at a surface speed nominally greater than the surface speed of the printing rolls. The anti-wrap rollers include a plurality of opposed peak and valley portions which enable them to interlock and grip the web along a line of contact. The system and method also includes a flow bar system to reduce false detections of a web break. A blow-down bar is also used to force air, or some other fluid, downward on a broken web so as to harmlessly force the broken web to the ground as it exits the web tensioning device. A series of sensors which project two beams in the form of a crossing pattern are utilized to more rapidly and accurately detect a web break.

    摘要翻译： 一种用于防止印刷织物破损的装置和方法，用于将打印机单元的橡皮布滚筒周围或其他污染。 该系统和方法包括位于印刷机单元下游的卷材张紧装置，用于保持断裂的卷材上的张力并从印刷机单元牵引卷材。 该装置包括多个卷筒纸扰动检测器，用于检测指示卷筒纸断裂的波浪，纹波或其它干扰。 位于纸幅上方和下方的一对防缠绕辊在检测到纸幅断裂时被接合，以将纸幅接合在它们之间，以将张力施加到幅材上并将其从印刷单元拉出。 防缠绕辊以标称大于印刷辊的表面速度的表面速度旋转。 防缠绕辊包括多个相对的峰和谷部分，使得它们能够沿着接触线互锁和夹紧幅材。 该系统和方法还包括一个流动条系统，以减少一个卷筒纸断裂的错误检测。 吹排杆还用于将空气或一些其它流体向下强制在破碎的腹板上，以便当破碎的腹板离开腹板张紧装置时将其破碎成无损的力。 利用一系列以交叉图案形式投影两个光束的传感器，以更快速和准确地检测卷筒纸断裂。

    Anti-wrap device for a web press
    2.
    发明授权
    Anti-wrap device for a web press 失效
    卷筒纸印刷机的防缠绕装置

    公开(公告)号：US5443008A

    公开(公告)日：1995-08-22

    申请号：US327095

    申请日：1994-10-21

    申请人： Mark Pavliny ,  Edward Lewandowski ,  William Lawrence ,  Michael Gregory ,  Guntis Ozers

    发明人： Mark Pavliny ,  Edward Lewandowski ,  William Lawrence ,  Michael Gregory ,  Guntis Ozers

    IPC分类号： B41F33/00 ,  B41F33/06 ,  B41F33/18 ,  B65H23/192 ,  B65H26/02 ,  B65H43/04 ,  B41F5/04

    CPC分类号： B41F33/18 ,  B41P2233/23

    摘要： A system and method for preventing a broken printing web from wrapping about or otherwise fouling the blanket cylinders of printing press units. The system and method includes a web tensioning device located downstream of the printing press units for maintaining tension upon a broken web and pulling the web from the printing press units. The device includes a plurality of web disturbance detectors for detecting a wave, ripple or other disturbance indicative of a web break. A pair of anti-wrap rollers located above and below the web are engaged upon detection of a web break to engage the web between them to exert tension onto the web and pull it from the printing units. The anti-wrap rollers are rotated at a surface speed nominally greater than the surface speed of the printing rolls. The anti-wrap rollers include a plurality of opposed peak and valley portions which enable them to interlock and grip the web along a line of contact.

    摘要翻译： 一种用于防止印刷织物破损的装置和方法，用于将打印机单元的橡皮布滚筒周围或其他污染。 该系统和方法包括位于印刷机单元下游的卷材张紧装置，用于保持断裂的卷材上的张力并从印刷机单元牵引卷材。 该装置包括多个卷筒纸扰动检测器，用于检测指示卷筒纸断裂的波浪，纹波或其它干扰。 位于纸幅上方和下方的一对防缠绕辊在检测到纸幅断裂时被接合，以将纸幅接合在它们之间，以将张力施加到幅材上并将其从印刷单元拉出。 防缠绕辊以标称大于印刷辊的表面速度的表面速度旋转。 防缠绕辊包括多个相对的峰和谷部分，使得它们能够沿着接触线互锁和夹紧幅材。