Patent ID: 7377216

Claim:
Variable format printing machine, comprising: at least two offset printing apparatus ( 1 ), each apparatus comprising a frame ( 2 ) supporting a paper cylinder ( 5 ) against which a blanket cylinder ( 9 ) presses a blanket ( 11 ) to be printed, the printing ink being supplied on a plate cylinder ( 19 ) in contact with the blanket cylinder ( 9 ) by inking rollers, wherein, the paper cylinder ( 5 ) of each apparatus ( 1 ) is devoid of any drive in rotation and is substantially fixed with respect to the frame ( 2 ), and between two adjacent apparatus ( 1 ) which print one and the same face of the blanket ( 11 ), the arrangement is such that this face is in contact only with the blanket cylinders ( 9 ), characterized in that the drive of the inking rollers ( 29 ) in rotation is ensured by a motor of which the speed is servo-controlled so that the peripheral speed of each of these rollers is substantially equal to that of the plate and/or to the speed of displacement of the blanket ( 11 ).