b'UNIFORMITY AS A BENEFITThe dryer group in Fig. 6 shows blow boxes in all pockets. At first glance, everything appears even. Both the dry air and the dew point temperatures are very regular. As a result, this also affects the water absorption capacity of the air in the pocket. In practice, this means air flow from the middle of the machine reaches all pockets towards both edges. Furthermore, the lower moisture content of the air in all pockets leads to higher water take-upFigure 6. Even pocket capacity: In summary, very effectiveventilationremoval of the evaporated water fromregularity across all pockets, Thomas Fischer states.the board.The target was also achieved, because an optimum CD moisture profile is, as everybody knows, a key quality characteristic across all paper grades. Figure 7.Air doctors in THE PROCESS IS CRUCIAL cross sectionUnwelcome wet streaks can be all but eliminated with the use of the right technology and appropriate adjustment of the machine components. The examples mentioned here are certainly convincing as practical achievements, but they are all based on a process that always starts with measurements, as the appearance of moisture streaks can have more than one cause. This is why TASK always approach each situation by first establishing the facts by means of measurements, and only then do they think about optimisation and restructuring. This creates certainty, and simplifies assessment and evaluation. In summary, very effective AIR DOCTORS AS AN OPTION removalof both doctor beam and blow box (Fig.of channeling the supply air directly into The same was true in this thirdof the7). Air doctors are very well suited tothe wedge between the exiting sheet case; a customer opted for air doctorevaporatedboth conventional and Slalom positions.and the cylinderleading to an evening technology, a space-saving alternativewater fromBesides optimal use of space in theout of the vacuum created. This also which can be considered a combinationall pockets pockets, air doctors have the advantageapplies to conventional groups.WORLD PULP&PAPER 37'