A nozzleless belt-cleaning sprocket support shaft for cleaning endless conveyor belts has a first end, a second end, a central portion of generally square transverse cross section with a plurality of elongate narrow slits in each of the side walls in longitudinally spaced apart relation along its length, and a plurality of sprockets mounted thereon. In some implementations, service provisioning can be facilitated in cases wherein the payment processor must reside in a strictly regulated Payment Card Industry compliant environment and the service providers operate servers that are not PCI-compliant. A liner is formed over the dual damascene structure.