Abstract: A lightweight, low-cost bridge mandrel applicable to the Flexographic printing process is adapted for mounting on the outer surface of a shaft or roller. The mandrel preferably includes a thin-walled, cylindrical metal tube having an inner surface, an outer surface, and two ends defining a length. An end cap is disposed at each end of the tube, each with a central bore to receive the shaft or roller. A polymeric layer is bonded directly or indirectly to the metal tube, thereby defining a precise, desired final diameter upon which to mount a printing sleeve. The metal tube is preferably steel, though aluminum and various metal or composite alloys may alternatively be used.

Abstract: A lightweight, low-cost bridge mandrel applicable to the Flexographic printing process is adapted for mounting on the outer surface of a shaft or roller. The mandrel preferably includes a thin-walled, cylindrical metal tube having an inner surface, an outer surface, and two ends defining a length. An end cap is disposed at each end of the tube, each with a central bore to receive the shaft or roller. A polymeric layer is bonded directly or indirectly to the metal tube, thereby defining a precise, desired final diameter upon which to mount a printing sleeve. The metal tube is preferably steel, though aluminum and various metal or composite alloys may alternatively be used.