| 摘要 |
The current invention relates to a machine for the production of a fiber web, specifically a paper or cardboard web, from at least one fiber stock suspension comprising at least one porous belt, specifically a wire belt, a felt belt, or similar belt, running continuously in the direction of web travel. Further including at least one suction box, including a closed box that can be connected to a vacuum source. On its upper surface that is in contact with the belt, a multitude of cover strips are mounted at certain distances from each other and vertical to the direction of travel L of the belt, forming suction slots. At least one suction box cover strip at which a pressure differential exists due to various prevailing ambient pressures, and has a width making contact with the wire, viewed vertically to the direction of travel of the belt, and having a value factor a* of the average width of the cover strips that are contacting the wire, whereby the value factor takes on a numerical value in the range of 0.05 to 0.95, preferably of 0.1 to 0.9 and whereby the average wire-contacting width of the cover strips is in the range of 10 mm to 30 mm.
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