subject: Dryer Section Of A Machine [print this page] Mesh belt dryer section of a machine for manufacturing a material sheet. The dryer section may include at least one dryer cylinder, a plurality of sheet guide rolls, a transport belt for guiding the material sheet in a meandering manner around the at least one dryer cylinder and the plurality of sheet guide rolls, and threads surrounding at least one of the at least one dryer cylinder and the plurality of sheet guide rolls. The threads may be positioned between the material sheet and a surface of the at least one of the at least one dryer cylinder and the plurality of sheet guide rolls.
Mesh belt dryer sections are generally known in the art. The material sheet is guided together with a transport belt over a number of dryer cylinders. During the removal of the material sheet from one cylinder to another, a tensile stress is necessary which, however, stretches the sheet and has a negative effect on paper quality. In addition, the danger of a sheet tearing in the subsequent areas of the dryer section, for example during smoothing and winding, is increased due to the tensile stress.
The mesh belt dryer section of the present invention may include a dryer cylinder and/or sheet guide rolls over which the material sheet is guided, surrounded by threads, in particular of a screen constructed of threads, positioned between the material sheet and the surface of the dryer cylinder or the sheet guide rolls. The threads or screen facilitate the sheet removal from the dryer cylinders or sheet guide rolls in such a way that the tensile stresses on the material sheet can be significantly reduced and the afore-mentioned disadvantages can be essentially avoided.
