| 摘要 |
PCT No. PCT/EP92/00208 Sec. 371 Date Sep. 8, 1992 Sec. 102(e) Date Sep. 8, 1992 PCT Filed Jan. 31, 1992 PCT Pub. No. WO92/13995 PCT Pub. Date Aug. 20, 1992.A headbox includes a nozzle type stock channel with an outlet gap. The nozzle type stock channel is defined by two flow guide walls. Arranged on the discharge end of the upper flow guide wall is a movable aperture to which attach numerous adjustment spindles which are arranged distributed across the machine width. Each adjustment spindle has on its end away from the aperture a spindle drive. Provided on the upper end of each spindle is a measuring device serving the determination of the local position of the aperture. The measuring device has a measuring housing and a measuring element movable in it. The measuring element is connected positively with the aperture, independently of the spindle, by way of a measuring rod. The measuring housing is positively connected with the area of the flow guide wall on the near side of the aperture, by way of an oblong tubular measuring reference.
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