发明授权
US5756156A Method for producing surface-treated paper and dry end of a paper machine
失效
用于生产表面处理纸和造纸机干燥端的方法
- 专利标题: Method for producing surface-treated paper and dry end of a paper machine
- 专利标题(中): 用于生产表面处理纸和造纸机干燥端的方法
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申请号: US705059申请日: 1996-08-29
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公开(公告)号: US5756156A公开(公告)日: 1998-05-26
- 发明人: Seppo Elijoki , Heikki Ilvespaa , Antti Kuhasalo , Reima Kerttula
- 申请人: Seppo Elijoki , Heikki Ilvespaa , Antti Kuhasalo , Reima Kerttula
- 申请人地址: FIX Helsinki
- 专利权人: Valmet Corporation
- 当前专利权人: Valmet Corporation
- 当前专利权人地址: FIX Helsinki
- 优先权: FIX950434 19950201
- 主分类号: F26B13/08
- IPC分类号: F26B13/08 ; D21F5/04 ; D21G1/00 ; D21G7/00 ; D21G9/00 ; D21H23/70 ; F26B13/10 ; F26B13/18 ; F26B13/30 ; B05D3/02
摘要:
A method for producing surface-treated paper, in particular of fine paper, and a dry end of a paper machine that makes use of the method. A paper web that has been dewatered by pressing is dried in the forward dryer section, in which drying energy is applied to the paper web over the entire length of the forward dryer section asymmetrically in the z-direction from the side of the bottom face of the web. This step is carried out by a number of successive groups with single-wire draw that are open downward. In this manner, shrinkage of the web both in the machine direction and in the cross direction is reduced or at least partially prevented, which shrinkage tends to take place when the dry solids content becomes higher. Paper broke is removed from underneath the drying groups that are open downward substantially by the force of gravity onto the broke conveyor placed underneath. The paper web which has a tendency of curling because of the asymmetric forward-drying is passed to the finishing section where it is finished while it is moistened and/or worked plastically so that the tendencies of curling that arose in the web in the forward drying stage are substantially reduced.
公开/授权文献
- US5168901A Fluid communication manifold and control system 公开/授权日:1992-12-08
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