Rotogravure printing system and the preparation and use thereof
AssigneeParamount International Services Ltd.
InventorIoannis Ioannou
Life of this patent
Estimating the term…
Abstract
A rotogravure printing machine has a shaft that rotates and a rotogravure cylinder sleeve for rotation with the shaft. An annular end plate connects to the shaft, and the end plate has a contact surface for contact with a mating contact surface at an inner side of the cylinder sleeve.
Claims19
A method of operating a rotogravure printing system comprising a machine provided with at least one rotatable shaft and an end plate for transfer of shaft rotation to a cylinder sleeve,
- which system further comprises a first rotogravure cylinder sleeve having a first base and a first gravure at a printing surface comprising a first outside layer package deposited over the first base and a second rotogravure cylinder sleeve having a second base and a second gravure at a printing surface comprising a second outside layer package deposited over the second base,
- said first base and second base being of the same size while said first printing surface and said second printing surface are of different outside diameter sizes,
- each first and second base contains aluminum or aluminum alloy,
- each first and second outside layer package comprises at least one high-velocity thermally sprayed copper or copper alloy layer, and each layer of the first layer package and the second layer package has a hardness greater than the base, and
- said rotogravure cylinder sleeves are to be rotated by means of the at least one shaft and an end plate coupled thereto,
- which method comprises:
- (a) assembling the end plate and the first rotogravure cylinder sleeve, which end plate is provided with at least one contact surface that is designed for contact with a mating contact surface defined at an inner side of each of the cylinder sleeves,
- (b) mounting the end plate and the first rotogravure cylinder sleeve onto the shaft;
- (c) carrying out a first printing operation, comprising the step of rotating the at least one shaft, and therewith the first rotogravure cylinder, so as to print the substrate in accordance with the gravure of the first rotogravure cylinder sleeve, and thereafter,
- (d) disassembling the end plate and the first rotogravure cylinder sleeve,
- (e) assembling the end plate with the second rotogravure cylinder sleeve, and
- (f) carrying out a second printing operation with the gravure of the second rotogravure cylinder sleeve.
A combination of rotogravure cylinder sleeves each provided with a gravure at a printing surface, and an end plate for transfer of rotation of a shaft to be inserted through the end plate to a first or to a second of the rotogravure cylinder sleeves, wherein the end plate is provided with at least one contact surface, and each of the rotogravure cylinder sleeves is provided with a mating sleeve contact surface defined at an inner side thereof, wherein each of the sleeve contact surfaces is sized and configured to assemble and disassemble from the end plate,
- wherein the first and second rotogravure cylinder sleeves each comprises a base and an overlaid layer package deposited at an outside of the base, the base is provided with a bore receiving the end plate and has a wall with a thickness that contains aluminum or aluminum alloy, wherein the overlaid layer package comprises at least one layer that is a high-velocity thermally sprayed copper or copper alloy layer, and each layer of the layer package has a hardness greater than the base.
A rotogravure printing system comprising a machine provided with at least one rotatable shaft and a first rotogravure cylinder sleeve and a second rotogravure sleeve, each provided with a gravure at a printing surface, which cylinder sleeve is to be rotated by means of the at least one rotatable shaft, and further comprising an end plate for transfer of said rotation of the shaft to each of the first and second rotogravure cylinder sleeves, wherein the end plate is provided with at least one contact surface, and each of the first and second rotogravure cylinder sleeves is provided with a mating sleeve contact surface defined at an inner side thereof, wherein each of the sleeve contact surfaces is sized and configured to assemble and disassemble from the end plate,
- wherein the first and second rotogravure cylinder sleeves each comprises a base and an overlaid layer package deposited at an outside of the base, wherein the base is provided with a bore receiving the end plate, has a wall with a thickness that contains aluminum or aluminum alloy, wherein the overlaid layer package comprises at least one layer that is a high-velocity thermally sprayed copper or copper alloy layer, and each layer of the layer package has a hardness greater than the base.
Dependencies are inferred from the claim text.