| 摘要 |
Proposed is a method for the dewatering of a material layer (S) of paper fibers in a double-screen former, where the sheet weight (oven dried sheet weight (otro)) is more than 100 g/m2 and/or the screen circulates with a speed of at least 100 m/min. In accordance with the invention the two screens are guided at two guide surfaces (5 and 7) which, for example, belong to open forming cylinders. In this arrangement forming cylinders of this kind are so dimensioned and positioned that no dewatering elements which contact one of the screens are present between the run-out line (11) of the screens (2, 3) from the first guide surface and the run-in line (12) at the second guide surface.
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