whose means formation of pressures induced by the wire 235 is also prevented in the closing wedge shaped nip spaces between the wire 235 and the mantles of the cylinders the blow suction boxes 217 are understood to designate blow boxes whose air blowing creates a vacuum and these boxes 217 do not communicate with sources of vacuum with respect to the details of the constructions of these blow suction boxes 217 which are marketed by the current assignee under the trade mark u201c uno run blow box u201d u2122 reference is made to the current assignee 39 s finnish patent nos 59 637 65 460 and 80 491 corresponding to u s pat nos 4 441 263 4 516 330 and 4 905 380 respectively incorporated herein by reference in their entirety after the introduction of the u201c uno run blow box u201d u2122 in the market by the current assignee others have suggested some blow box constructions with respect to which reference is made to u s pat no 4 502 231 assigned to j m voith gmbh and u s pat no 4 661 198 assigned to beloit corp whose applications in positions of blow boxes are also included in the overall concept of the present invention in the gaps between the reversing cylinders 231 there are blow boxes 216 by whose means these intermediate spaces are air conditioned and evaporation from the web w is promoted in connection with each of the dryer groups r 21 r 22 in the after.