central plane the upper cylinders 2 and 7 are supported on the upper longitudinal beam 67 68 69 in a upper plane further columns and longitudinal beams without reference numerals for the guide rolls 36 39 are located on the upper longitudinal beams 67 68 69 if one of the lower cylinders for instance the cylinder 4 must be temporarily removed from the machine the frame parts 60 39 and 63 39 are temporarily removed if one of the central cylinders 3 or 6 must be temporarily removed then the central part 68 of the upper longitudinal beam and the auxiliary column 64 or 64 39 near the respective central cylinder are removed the removed cylinder is then brought into the position indicated by the dot dash circle and from there it is removed laterally out of the machine as can be noted from fig1 and 2 the first dryer group having the first supporting belt 41 comprises in addition to the first cylinder 1 two successive inclined rows of cylinders which form a v shaped double row within the first dryer group the bottom of the web comes into contact with the cylinders 1 to 7 accordingly the reversing rolls 35 lie predominantly below the space between the respective dryer cylinders adjacent each reversing roll or more accurately on the outside of the v formed by the rows of cylinders this is favorable for the removal of any break paper which may be produced since the break paper can simply fall downward from the reversing rolls onto the floor 57.