Patent ID: 6651557
Filing Date: 2003-11-25
Classification: B41F,B41P

Abstract:
A printing unit for double-sided offset printing on a substrate, said unit comprising:a first blanket cylinder disposed on a first side of a substrate path; a second blanket cylinder disposed on a second side of a substrate path; a first pair of plate cylinders each selectively moveable into and out of contact with the first blanket cylinder; a second pair of plate cylinders each selectively moveable into and out of contact with the second blanket cylinder; wherein at least one of said blanket cylinders is moveable to a first position for pressing said substrate against the other blanket cylinder and is moveable to a second position to provide a clearance between said blanket cylinders along said substrate paths; and wherein the first blanket cylinder and the second blanket cylinder are capable of continuously printing on both sides of the substrate while one of the first pair of plate cylinders is not in contact with the first blanket cylinder and one of the second pair of plate cylinders is not in contact with the second blanket cylinder.