Patent ID: 7152527

Claim:
A method of making a printing unit for a sheet-fed perfecting multi-color printing press from independent replaceable modules, each module comprising a combination of at least two elements of a group consisting of an intermediate cylinder, impression cylinder, blanket cylinder, plate cylinder, inking mechanism, and water supply mechanism, the method comprising the steps, of: assembling the printing unit from a plurality of the independent modules, the printing unit including two types of modules A and A′, each including an intermediate cylinder, an impression cylinder, blanket cylinder, plate cylinder, inking mechanism, and water supply mechanism, and a module B for a sheet-fed perfecting multi-color printing press including a blanket cylinder, plate cylinder, inking mechanism, and water supply mechanism; and assembling a top surface printing unit and a back surface printing unit by combining said modules A, A′ with module B, in which said modules A and A′, each having an intermediate cylinder, are used in said printing unit when a unit for a two-stage type sheet-fed perfecting multi-color printing press is assembled; and assembling a top surface printing unit and a back surface printing unit by combining said A, A′ with module B, in which the intermediate cylinder of module A′ is replaced with the impression cylinder so that the module A′ in which the intermediate cylinder is replaced with the impression cylinder and module B are used when a unit for an impression cylinder of module B connection type sheet-fed perfecting multi-color printing press is assembled.