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Method and apparatus for separating a web from a former wire and transferring the web to a press felt

机译:用于将幅材与先前的网分开并将幅材转移至压榨毛毯的方法和设备

摘要

In a paper making machine, a method and apparatus for separating the web from the former wire and transferring the same to a transfer felt which preferably comprises a press felt wherein the web is carried by the former wire over a sector of a reverser roll so that it is subjected to a centrifugal force which tends to separate the web from the former wire and wherein the transfer felt is guided so that it engages the web over at least a portion of the sector of the reverser roll lapped by the web carrying former wire. An external suction is applied to the web through the transfer felt in the region of the sector of the reverser roll lapped by the web carrying former wire and engaged transfer felt which subjects the web to a suction force which acts in substantially the same direction as the centrifugal force. The transfer felt laps a grooved suction roll which cooperates with external suction applying apparatus for assisting and maintaining the web adhered to the transfer felt between at least two press nips, the suction applying apparatus communicating with the means for applying the external suction to the web.
机译:在造纸机中,一种用于将纸幅与原网分开并将其转移到传送毡的方法和设备,该输送毡优选包括压榨毛毯,其中纸幅由原网承载在反向辊的扇区上,从而它受到离心力的作用,该离心力趋向于使幅材与原网分开,并且其中转移毡被引导,以使其在由承载原网的幅材覆盖的反向辊的至少一部分扇形区域上与幅材接合。外部抽吸通过传送毡施加到幅材上,该传送毡在由承载幅材的幅材和接合的传递毡搭接的反向辊的扇形区域内,使幅材受到与力基本相同的方向作用的吸力。离心力。转移毛毯位于带凹槽的抽吸辊上,该抽吸辊与外部吸力施加装置协作,以辅助并保持在至少两个压榨压区之间粘附至转移毛毯的幅材,该吸力施加装置与用于向幅材施加外部吸力的装置连通。

著录项

  • 公开/公告号US4236962A

    专利类型

  • 公开/公告日1980-12-02

    原文格式PDF

  • 申请/专利权人 VALMET OY;

    申请/专利号US19790048602

  • 发明设计人 MATTI KANKAANPAA;

    申请日1979-06-14

  • 分类号D21F2/00;

  • 国家 US

  • 入库时间 2022-08-22 14:51:35

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