device for a doctoring blade assembly operatively linked to a cylinder in a printing press is provided which includes interposed to the piston rod of a cylinder piston unit actuated by compressed air and the oscillating holder assembly accommodating the doctoring blade a mechanical means such as a spring for storing up a force and or a means effective to periodically transfer an impact force to the doctoring blade oscillating holder application_number US 75914085 A description as shown in fig1 linked operatively to a rotating cylinder 1 of a printing press in a manner known per se is a doctoring blade 2 mounted on a holder 3 which can oscillate around a pivot pin 4 forming a part of a supporting arm 5 set approximately vertical from the rear side of the holder 3 there juts out a cantilever mounted arm 6 and at the bottom the supporting or carrier arm 5 is made fast with a bracket 7 said supporting bracket 7 accommodates a cylinder piston unit 8 which is urged such as by compressed air to expand in the direction indicated by the arrows p the compressed air pressure would be adjustable the piston rod of the cylinder piston unit 8 indicated at 9 rests through an intervening coil spring 10 on a stem 11 which is connected to the overhanging arm 6 through a pin 12 it may be seen from fig2 that in detail the end of the rod 9 is.