| 摘要 |
PCT No. PCT/EP85/00280 Sec. 371 Date Jan. 7, 1986 Sec. 102(e) Date Jan. 7, 1986 PCT Filed Jun. 13, 1985 PCT Pub. No. WO86/00099 PCT Pub. Date Jan. 3, 1986.The invention is directed to a composite-type paper making wire or screen, comprising an upper or forming fabric and a lower or wear fabric including at least three sets of longitudinal threads and at least two sets of cross threads. Due to the imperfect nature of the paper-facing surface which results in all kinds of markings in the paper, paper making screens of this type are unsuited for the manufacture of fine papers. To eliminate this drawback, the screen is formed in such a way that at least half of all outwardly disposed longitudinal knuckles of the upper fabric (paper-facing side) of the screen are formed of two sets of longitudinal threads and that the first set of longitudinal threads is woven with the first set of cross threads, the third set of longitudinal threads is woven with the second set of cross threads, and at least portions of the second set of longitudinal threads are woven with both sets of cross threads.
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