may be actuated by a fluid such as compressed air supplied thereto through a conventional controller 31 by adjustment of the controller 31 the arms 28 can be actuated to move the roller 25 into and out of nip forming relation with the roller 10 and to adjust the pressure in the nip as required a pair of third lever arms 32 are mounted on pivots 33 journalled on the lever arms 28 and have bearings 34 at their upper ends in which are journalled the ends of a shaft 35 supporting a third roller 36 the roller 36 is adapted to be moved into and out of nip forming relation with the roller 25 by means such as expansion bellows 37 interposed between the machine frame and actuator members 38 at the lower ends of the arms 32 the bellows 37 may be expanded and contracted by a fluid such as compressed air supplied thereto from the controller 31 when the latter is in a selected control setting when it is desired to coat a web using the coating blade support roller technique of u s pat no 3 489 592 the controllers 23 and 31 are set so that the blade holder 18 and blade 19 are moved to the coating.