Moisture barrier, filter seal for hopper rail car hatches
    1.
    发明授权
    Moisture barrier, filter seal for hopper rail car hatches 失效
    防潮屏障,漏斗挡泥板过滤器密封

    公开(公告)号:US5628254A

    公开(公告)日:1997-05-13

    申请号:US516799

    申请日:1995-08-18

    IPC分类号: B61D5/00 B65D90/36 B61D49/00

    CPC分类号: B61D5/004 B65D90/36

    摘要: A moisture barrier seal for use on a hopper car hatch opening that does not need to be removed before vacuum unloading of the hopper car due to the use of a grained plastic such as vertically drawn or cast polyethylene which will rupture as soon as the seal is subjected to the pressure differential across the seal created by the application of vacuum to the hopper car. The moisture barrier layer when combined with a filter layer forms a combination moisture barrier and filter seal.

    摘要翻译: 用于漏斗车厢开口处的防潮密封件,由于使用诸如垂直拉拔或浇注聚乙烯的颗粒塑料,在密封件一旦破裂之前,在料斗车的真空卸载之前不需要将其移除,该塑料将立即破裂 承受通过向料斗施加真空而产生的密封件上的压力差。 当与过滤层组合时,防潮层形成组合防潮层和过滤器密封。