Method for adding moisture to a traveling web
    3.
    发明授权
    Method for adding moisture to a traveling web 失效
    将湿气添加到行进网的方法

    公开(公告)号:US4207143A

    公开(公告)日:1980-06-10

    申请号:US731985

    申请日:1976-10-13

    IPC分类号: D21G7/00

    CPC分类号: D21G7/00 B65H2301/5142

    摘要: Moisture is added to a traveling web of paper or the like by passing the web over one or more steamfoil nozzle devices which emit substantially dry steam vapor into the region between the web and the steamfoil. The steamfoil nozzle or nozzles extend across the web from side-to-side and the velocity of the emitted steam vapor is such that it produces a pressure differential between the side of the web adjacent the steamfoil and the opposite side of the web so that the web is urged toward the steamfoil where it rides on a cushion provided by the steam vapor and the boundary layer air surrounding the web. The steam vapor condenses on and in the relatively cool web when the web is passed over the steamfoil and the substantially dry steam vapor is mixed with the boundary layer air associated with the web. The steam flow disrupts the boundary layer air to permit intimate contact of the steam with the web to add moisture to the web.

    摘要翻译: 通过将纸幅通过一个或多个蒸发型蒸汽蒸汽的一个或多个蒸汽喷嘴装置将水分加入到纸张等的行进网中,所述蒸汽喷嘴装置将基本上干燥的蒸汽蒸汽排放到幅材和蒸汽片之间的区域中。 蒸汽喷嘴或喷嘴从一侧到另一侧延伸穿过幅材,并且所发射的蒸汽蒸汽的速度使得其在邻近蒸汽翼片的幅材的侧面和幅材的相对侧之间产生压力差,使得 腹板被推向蒸汽翼,在那里它被骑在由蒸汽蒸气和围绕网的边界层空气提供的衬垫上。 当幅材通过蒸汽片时,蒸汽蒸汽在相对冷却的纤维网上冷凝,并且基本上干燥的蒸汽蒸气与与纸幅相关联的边界层空气混合。 蒸汽流破坏边界层空气,以允许蒸汽与纤维网紧密接触,以将水分添加到纤维网上。