| 摘要 |
The invention relates to an apparatus for the floatable guiding of webs of material by air blown against the web. The apparatus comprises blowing boxes 2-6 disposed offset in relation to one another above and below the web 1 of material. Each blowing box 2-6 has two opposite rows of blowing apertures 21 whose blowing direction encloses an acute angle a2 with a deflecting surface 25, 26 which adjoins the edge of the blowing aperture 21 remote from the web 1 of material. The deflecting surface 25 also encloses an acute angle a3 with the web 1 of material. The two acute angles a2, a3 are so selected that the air blown out of the blowing apertures 21 is guided away the deflecting surfaces 25 and against the web 1 of material, where it spreads out in the form of a source flow 30. In this way both a strong air cushion supporting the web 1 of the material is obtained and also a high heat transfer at the web 1 of material and a clearly-defined flow of the blown air from the air cushion.
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