发明名称 |
Method and apparatus for controlling distortion of fibre orientation in a paper web |
摘要 |
Method and apparatus in the head box of a paper machine for controlling the distortion of fibre orientation in the paper web comprise an arrangement wherein by-pass flows of pulp suspension are passed through opposite passages lateral of the turbulence generator preceding the slice portion or discharge channel of the head box. The magnitude and/or the mutual relationship of the by-pass flows is adjusted to control the distortion of the fibre orientation in that the by-pass flows produce a transverse flow in the discharge flow of the pulp suspension from the head box, the speed of which compensates for the distortion of the fibre orientation.
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申请公布号 |
US4687548(A) |
申请公布日期 |
1987.08.18 |
申请号 |
US19850791910 |
申请日期 |
1985.10.28 |
申请人 |
VALMET OY |
发明人 |
ILMONIEMI, ERKKI;KOSKIMIES, JOUNI;LYYTINEN, MARKKU;PITKAEJAERVI, KARI;OTTELIN, ESA |
分类号 |
D21F1/02;(IPC1-7):D21F1/02 |
主分类号 |
D21F1/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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