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US 4,812,219 AGranted
Method of producing a surface sleeve for a plate cylinder for printing purposes
AssigneeJens Erik Sattrup
InventorsJens E. Sattrup, Ole Brondsted
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AssigneeJens Erik Sattrup
InventorsJens E. Sattrup, Ole Brondsted
Estimating the term…
A surface sleeve for a rotogravure cylinder or an offset cylinder is produced by mounting a basic sleeve (20) on a supporting mandrel (10). Both the outer peripheral surface of the mandrel and the inner and outer surfaces of the basic sleeve are circularly cylindrical. On the nickel cylinder (20), a thin layer (21) of copper or nickel is deposited electrolytically, and on top of this layer an outer copper layer (22), preferably high-gloss copper, is deposited. In the case of rotogravure, this outer copper layer has a thickness which equals or slightly exceeds the desired maximum well depth of the printing pattern later to be made in the outer surface of the surface sleeve. In the case of offset printing, the outer copper layer is coated with a chrome layer in which the printing pattern is etched. After etching or engraving of a printing pattern in the outer surface of the sleeve, and after a possible chrome-plating of the etched or engraved surface, the free end parts of the surface sleeve are cut off, as the thickness of the metal layers there has become increased during the electrolytic deposits.
A method of producing a surface sleeve for a plate cylinder, said method comprising, arranging a basic sleeve made from an electrically conductive material and having inner and outer circularly cylindrical peripheral surfaces, tightly around an outer circularly cylindrical peripheral surface of a supporting mandrel, electrolytically depositing an inner metal layer on the outer peripheral surface of the basic sleeve, electrolytically depositing an outer copper layer with a smooth substantially circularly cylindrical outer surface, on said inner metal layer, and cutting off opposite outer end portions of the sleeve after depositing the outer copper layer thereon.
A method of producing a surface sleeve for a plate cylinder, said method comprising, arranging the basic nickel sleeve having inner and outer circularly cylindrical peripheral surfaces tightly around an outer circularly cylindrical peripheral surface of a supporting mandrel, electrolytically depositing an inner metal layer on the outer surface of the basic sleeve, electrolytically depositing an outer copper layer with a smooth substantially circularly cylindrical outer surface on said inner metal layer, providing in said outer cyanide copper layer a rotogravure printing pattern comprising wells having a depth not exceeding the thickness of said outer layer, and cutting off opposite outer end portions of the surface sleeve so produced.
A method of producing a surface sleeve for an offset printing cylinder, said method comprising arranging a basic nickel sleeve having inner and outer circularly cylindrical peripheral surfaces tightly around an outer circularly cylindrical peripheral surface of a supporting mandrel, electrolytically depositing an inner metal layer on the outer peripheral surface of the basic sleeve, electrolytically depositing an outer copper layer with a smooth, substantially circularly cylindrical outer surface on said inner metal layer, coating said outer copper layer with a layer of matt hard chrome, providing an offset printing pattern in the outer peripheral surface of said chrome layer, and cutting off opposite outer end portions of the surface sleeve so produced.
A surface sleeve for a plate cylinder and comprising a basic nickel sleeve having inner and outer circularly cylindrical peripheral surfaces, an inner metal layer electrolytically deposited on the outer peripheral surface of the basic sleeve, and an outer copper layer with a smooth, substantially circularly cylindrical outer peripheral surface electrolytically deposited on said inner metal layer and having a rotogravure printing pattern provided therein, opposite outer end portions of the surface sleeve having been cut off after deposition of said outer copper layer thereon.
A surface sleeve for an offset printing cylinder and comprising a basic nickel sleeve having inner and outer circularly cylindrical peripheral surfaces, an inner metal layer electrolytically deposited on the outer peripheral surface of the basic sleeve, an outer copper layer with a smooth, substantially circularly cylindrical outer peripheral surface electrolytically deposited on said inner metal layer, and a coating of a matt hard chrome layer arranged on the peripheral surface of the outer copper layer and having an offset printing pattern provided thereon, opposite outer end portions of the surface sleeve having been cut off after deposition of said outer copper layer thereon.
Dependencies are inferred from the claim text.