a uniform temperature and are also not exposed to dirt for the reasons discussed in the introduction of the specification it is important that on the one hand the material 4 being fed in which latter makes the board is moved on a colder conveyer belt and that on the other hand the belt carrying the material 4 39 suffers no change of length due to being heated up when passing through the pressing section for this reason the material 4 39 is brought up by a preceeding belt 51 and the press belt 2 is a separate belt having deflection cylinders 11 and 12 which are pushed as close as possible to the pressing zone 3 so that the belt 2 suffers as little temperature loss as possible and can remain at a temperature approaching the press temperature as closely as possible at the separation point 50 the material 4 39 which consists of a bed having a composition exactly predetermined over its thickness of wood chips and fine wood fibers is transferred from belt 51 to belt 2 so that during the transfer the material 4 39 does not fall through the gap between the deflection cylinders 53 and 11 and the bed 4 39 cannot tumble disturbing its structure a liquid 55 is contained in the wedge between the deflection cylinders 53 and 11 the relationships in detail being as was described in connection with fig1.