The invention relates to novel substituted condensed pyrimidine compounds of general formula in which the chemical groupings, substituents and indices are as defined in the description, and to their use as medicaments, in particular as medicaments for the treatment of conditions and diseases that can be treated by inhibition of the PDE4 enzyme. This method is characterized in that the entry-gap height is checked, set andor regulated in dependence on the density andor the weight per unit area of the pressing-material mat. The legs are flat plate portions substantially parallel to the heatspreader plate.