In the PMT Smarblow a special doctor body is used to convey virgin, conditioned air (dry and heated) across the machine and inject it in the optimum desired point, where the paper leaves the dryer surface. The air is diffused across the doctor face by lamination through a linear nozzle which generates a uniform air blade. The air blade in the release point is beneficial in two ways:
- It saturates the dynamic vacuum where the paper is released from the dryer surface, improving sheet stability in the transfer draw to the following dryer.
- It maximizes the transfer capacity of sheet moisture to the pocket air; this results in an increase of the dryer section evaporation rate and, an improved humidity profile inside the pockets and, as a consequence, an improved moisture profile of the final sheet.