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    • 1. 发明授权
    • Web cut-off device
    • 网络切断设备
    • US06293175B1
    • 2001-09-25
    • US09297283
    • 1999-06-07
    • Petri EnwaldAaron MannioPekka RuhaKalevi Vesterinen
    • Petri EnwaldAaron MannioPekka RuhaKalevi Vesterinen
    • B26D104
    • B65H19/26B26D1/065B26D5/12F15B15/1419F15B15/149Y10T83/04Y10T83/8858
    • A web cut-off device including a frame defining a piston chamber, a piston movable in the piston chamber, a cutter blade attached to the piston such that upon movement of the piston in a first direction, the cutter blade is adapted to engage and cut a web, at least one pressure chamber and lower connecting ducts for connecting the pressure chamber(s) to a lower part of the piston chamber. The ducts opening directly into opposed side walls defining the piston chamber such that the piston operates as a valve between the piston chamber and the pressure chamber(s). The device also includes at least one return pressure duct in communication with an upper part of the piston chamber such that upon introduction of pressure into the return pressure duct(s), the piston is moved in a second direction opposite to the first direction, and at least one bottom duct in communication with a bottom of the piston chamber such that by introducing pressure into the bottom of the piston chamber via the bottom duct(s), movement of the piston in the first direction is initiated and by evacuating pressure from the bottom of the piston chamber via the bottom duct(s), the piston is maintained stationary in the piston chamber. A method for cutting a web using the device is also disclosed.
    • 一种纸幅切断装置,包括限定活塞室的框架,可在活塞室中移动的活塞,附接到活塞的切割刀片,使得当活塞沿第一方向移动时,切割刀片适于接合和切割 腹板,至少一个压力室和用于将压力室连接到活塞室的下部的下连接管道。 导管直接打开限定活塞室的相对侧壁,使得活塞作为活塞室和压力室之间的阀。 该装置还包括与活塞室的上部连通的至少一个返回压力管道,使得在将压力引入回流压力管道中时,活塞沿与第一方向相反的第二方向移动,并且 至少一个与活塞室的底部连通的底部管道,使得通过经由底部管道将压力引入活塞室的底部,启动活塞沿第一方向的运动,并且通过从 通过底部管道活塞室的底部,活塞在活塞室中保持静止。 还公开了使用该装置切割网的方法。