transport of the boards comprise a circulating conveyor onto which the boards are arranged for transport in one embodiment of the invention the web is rolled off from a roller passed by means of further rollers parallel to the surface of the boards which are transported and the web is then again rolled onto another roller in contrast to the prior art mentioned above an exchange of the web is sufficient if a surface structure is to be modified or if a structure of the web comprises damages e g due to wear by means of the application of the web additionally a uniform quality of a generated surface structure can be assured since in contrast to a roller with a structured surface the quality of the surface of the web is not changed by the de winding of the web which generates the structure additionally the structure in the surface of the coating is generated essentially without pressure such that the surface of the web does advantageously show no signs of wear for this reason in one embodiment of the invention the rolls for the transport of the web are arranged such that they form a funnel or hopper in cross.