Intermediate sleeve
View Patent ↗An intermediate sleeve is provided which is adapted to be mounted on a print cylinder. The intermediate sleeve includes a base layer, a reinforcing layer, a barrier layer, and a surface layer. The sleeve further includes at least one air channel extending longitudinally, circumferentially, or spirally along the interior of the sleeve, at least one air passageway extending from an inner surface of the sleeve into the air channel, and a plurality of orifices extending radially outward from the air channel to an outer surface of the sleeve. The air channel, air passageway, and orifices are in communication such that pressurized air can be supplied from the interior of the print cylinder to the outer surface of the sleeve for mounting a printing sleeve on the intermediate sleeve.
1. An intermediate sleeve adapted to be mounted on a print cylinder; said sleeve comprising a generally cylindrical tube having an inner surface, an outer surface, and first and second ends; said sleeve including a base layer, a polymeric reinforcing layer over said base layer including an upper surface and a lower surface, a barrier layer over said reinforcing layer, and a surface layer; said sleeve further including at least one air channel along the longitudinal length of the interior of said sleeve formed by removal of a portion of said upper surface of said reinforcing layer with said barrier layer forming an upper wall for said at least one air channel, at least one air passageway extending from said inner surface into said air channel such that said at least one air channel is in communication with said at least one air passageway, and a plurality of orifices extending radially outward from said at least one air channel to said outer surface of said sleeve, wherein said orifices are provided at intervals along the longitudinal length of said sleeve.
2. The intermediate sleeve of claim 1 wherein said orifices extend through said barrier layer and said surface layer.
3. The intermediate sleeve of claim 1 including at least two air channels therein.
4. The intermediate sleeve of claim 1 including at least two air passageways therein.
5. The intermediate sleeve of claim 1 wherein said reinforcement layer comprises a foamed polyurethane.
6. The intermediate sleeve of claim 1 wherein said reinforcement layer includes at least two air channels formed therein.
7. The intermediate sleeve of claim 1 wherein said barrier layer is selected from an adhesive tape or a fiber-reinforced polymer.
8. The intermediate sleeve of claim 1 wherein said barrier layer comprises an upper wall of said at least one air channel.
9. The intermediate sleeve of claim 1 wherein said surface layer comprises polyurethane.
10. The intermediate sleeve of claim 1 wherein said at least one air channel has a depth of between about 0.5 to 5 mm.
11. The intermediate sleeve of claim 1 wherein said at least one air channel has a width of from between about 3 to 20 mm.
12. In combination, an intermediate sleeve mounted on a print cylinder, said sleeve having an inner surface, an outer surface, and first and second ends; and comprising a base layer, a reinforcing layer including an upper surface and a lower surface, a barrier layer, and a surface layer; said sleeve further including at least one air channel extending along the longitudinal length of the interior of said sleeve formed by removal of a portion of said upper surface of said reinforcing layer with said barrier layer forming an upper wall for said at least one air channel, at least one air passageway extending from said inner surface of said sleeve into said air channel; and a plurality of orifices extending radially outwardly from said at least one air channel to said outer surface of said sleeve, wherein said orifices are provided at intervals along the longitudinal length of said sleeve; said air channel, air passageway and orifices being in communication such that pressurized air can be supplied from the interior of said print cylinder to said outer surface of said sleeve for mounting a printing sleeve thereto.