Patent ID: 7124685

Claim:
An internally piped print cylinder comprising: a drive side header; said drive side header including an air inlet bore; a tending side header, the tending side header including a central axis, a proximal end and a distal end, an air outlet means including a first internal bore disposed axially within the proximal end of the tending side header but not extending fully through to the distal end of the tending side header, at least one second internal bore disposed perpendicularly to the axis of the tending side header, and an outer circumferential surface, the second internal bore extending from one side of the outer surface to the first internal bore; a thin walled print cylinder extending longitudinally between the drive side header and the tending side header, said thin walled print cylinder having an outer surface and a hollow inside area; a sealing plate, the sealing plate being disposed within the hollow inside area of the cylinder towards so as to create a cylindrically-shaped void between the sealing plate and the tending side header, the sealing plate having a central bore; a centrally disposed internal pipe, the internal pipe comprising a proximal end, a distal end, an internal bore that extends between the proximal end and the distal end, the proximal end of the internal pipe being functionally adapted to be received by the second internal bore of the drive side header, the distal end of the internal pipe being received within the central bore of the sealing plate, the internal pipe forming an air flow continuum with the cylindrically-shaped void created between the sealing plate and the drive side header and with the air inlet bore of the drive side header; and a plurality of axially extending pipes for passing air from the internal pipe to the cylindrical portion of the print cylinder and to the air outlet means of the tending side header; wherein air applied to the air inlet means of the drive side header passes to the outer surface of the print cylinder.