| 摘要 |
In a process for a non-contacting directional control of a web, which is stabilized in a floating state and moves through a treating space, a treating fluid is supplied to said web and the treating fluid is flowed against the rear surface of a guiding surface element which is airfoil-shaped in cross section. Said rear surface is convex toward the web. The treating fluid is sucked from the space between said guiding surface element and said web. This process is adapted to separate a boundary layer from that surface of the web which faces the guiding surface element, and to suck off also said boundary layer.
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