Patent ID: 7975609

Claim:
A printing unit for printing a web of paper comprising: a frame; and at least a first printing group, the first printing group including a first plate cylinder having a center axis and a first blanket cylinder having a center axis to co-operate with a pressing cylinder; the printing group further comprising at least one main connection rod movable with respect to the frame and carrying the blanket cylinder for supporting the first blanket cylinder and moving the first blanket cylinder with respect to the frame between at least one throw-on position, with the first blanket cylinder pressed against the first plate cylinder and against the pressing cylinder, and a throw-off position, with the first blanket cylinder spaced apart from the first plate cylinder and the pressing cylinder; and at least one auxiliary connection rod articulated to the main connection rod at a first end of the auxiliary connection rod, pivotable with respect to the main connection rod about an axis parallel with the center axes of the first plate cylinder and first blanket cylinder, one end of the first blanket cylinder received in a second end of the auxiliary connection rod opposite the first end so as to rotate in the auxiliary connection rod about the center axis thereof; the main connection rod rotatable with respect to the frame about the center axis of the first plate cylinder.