Patent ID: 7530307

Claim:
A cleaning system for cylinder surfaces of a printing machine, comprising a number of automated cleaning devices ( 1 , 1 ′, 1 ″) each allocated to one or more cylinders, each having a supply line ( 4 , 4 ′, 4 ″) for supplying detergent ( 3 ), a common feed pipe ( 5 ) connected to the supply lines ( 4 ), at least one supply device allocated to the common feed pipe ( 5 ), the at least one supply device comprises a piston-cylinder unit ( 9 ), and a detection unit ( 17 , 18 , 19 ) is allocated to the piston-cylinder unit ( 9 ) for controlling the piston stroke of the piston, wherein the detection unit ( 17 , 18 , 19 ) is adapted to calculate an average speed of piston motion in a certain temporal interval using detected measuring values of the piston stroke and compares the average speed to a predetermined upper limit for the average speed as well as provides results of the comparison for further processing.