Drilled unported vacuum drum with a porous sleeve
    1.
    发明公开
    Drilled unported vacuum drum with a porous sleeve 失效
    Durchbohrte torfreie Vakuumtrommel mit einemporösenTülle。

    公开(公告)号:EP0376127A2

    公开(公告)日:1990-07-04

    申请号:EP89123468.4

    申请日:1989-12-19

    IPC分类号: B65H20/12 B65H27/00

    摘要: An unported vacuum drum (12) has a system of closely spaced small grooves (30) in the outer surface and holes (36) drilled in the drum (12) provide communication between the grooves (30) on the outer surface and a space on the interior (16) of the drum (12). The interior drum (16) can be connected to a source (28) of vacuum for applying the vacuum through the holes (36) to the grooves (30). In order to avoid defects that may occur in a web brought into contact with a drum (12), the outer surface of the drum (12) is covered with a porous sleeve (40). The pores (42) in the sleeve (40) enable the vacuum to be applied from the grooves (30) to the outer surface of the sleeve (40) for holding the web onto the sleeve (40).

    摘要翻译: 未输送的真空鼓(12)具有在外表面中紧密间隔的小凹槽(30)的系统,并且在滚筒(12)中钻出的孔(36)提供外表面上的凹槽(30)之间的连通, 滚筒(12)的内部(16)。 内部鼓(16)可以连接到真空源(28),以通过孔(36)将真空施加到凹槽(30)。 为了避免与鼓(12)接触的网中可能发生的缺陷,滚筒(12)的外表面被多孔套筒(40)覆盖。 套筒(40)中的孔(42)能够使真空从凹槽(30)施加到套筒(40)的外表面,以将卷材保持在套筒(40)上。