| 摘要 |
Apparatus and methods of the invention create a movable paper machine threading tail that can be shifted away from the front ends of downstream rolls, thereafter to be widened symmetrically from a central position of the machine. Embodiments of the improvement comprise two independently traversable cutting assemblies mounted on one or more transverse service beams. Each cutting assembly comprises a traversing carriage upon which is mounted an appropriate web cutting device. Carriage positioning and cut activation are controlled in a way that one of said tools replaces the machine's somewhat permanently positioned front deckle squirt in defining the front most edge of a threading tail. Apparatus of the improvement also provide the means of creating and removing a sample from a main web without interrupting the path of the web through the machine thereby avoiding the need to re-thread following sampling procedures.
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