Improved sleeve for blanket cylinder of an indirect or offset printing machine

摘要

A sleeve, to be drawn over a rotary support (2) in order to define a blanket cylinder (1) of an indirect or offset printing machine, this cylinder (1) cooperating with a lithographic plate cylinder from which it receives the data to be printed and with a support onto which said data are transferred, said support moving between the blanket cylinder (1) and a pressure cylinder, the sleeve (3) comprising an inner cylindrical portion (6) to be drawn over the aforesaid rotary support (2) and having its surface covered by a layered structure (10) comprising at least one compressible layer (11) and an incompressible outer layer arranged to cooperate directly with the lithographic plate and with the support to be printed; the layered structure (10) is at least partly of polyurethane material.