| 摘要 |
<p>Web drying apparatus having a permeable dryer fabric (12) to hold the web (11) being dried against the peripheries of a plurality of drying cylinders (10), the apparatus being provided with at least one plenum (1) which extends laterally between adjacent drying cylinders (10), the plenum (1) having an outlet (4) directed towards the permeable fabric (12) where the fabric leaves one cylinder and a foil (6) which extends from the plenum (1) to the permeable fabric (12) at the downstream side of the outlet (4) with respect to the direction of fabric movement to direct web drying medium leaving said outlet through said permeable fabric and against said web, the apparatus being characterised in that said plenum further comprises a second foil (7) which extends from the plenum to the permeable fabric (12) at the upstream side of the outlet (4) with respect to the direction of fabric movement to redirect at least some of the boundary layer of air away from said fabric (12) before said fabric passes said outlet (4).</p> |
