Texturing roller in a paper machine

A roller for a texturing press on a papermaking machine, said roller having an interchangeable engraved sleeve, said roller comprising a cylindrical shell having a plurality of axially and circumferentially spaced apertures in its peripheral surface through which pressurized air may be ejected, said cylindrical shell having an inner shell and an outer shell, said inner shell disposed within said outer shell, at least one axially extending channel within the thickness of the shell for supplying pressurized air to the apertures, means for supplying pressurized air to said at least one axially extending channel, at least one said axially extending channel defined by an axially extending groove in the surface of one of said inner and outer shells.