Patent ID: 8714729

Claim:
An imaging device comprising: a substantially continuous web; an imaging device main frame; at least one modular roll bar assembly, each modular roll bar assembly in the at least one modular roll bar assembly including: a plurality of roll bars; and a support frame configured to operatively support the plurality of roll bars such that the plurality of roll bars define a web path having a non-linear shape with an entrance end and an exit end, the entrance end being configured to receive a substantially continuous web of substrate material, the plurality of roll bars being configured to guide the continuous web past the exit end, the at least one modular roll bar assembly being removably attached to the imaging device main frame; a temperature control system having a source of thermally controlled air that is configured to supply air at a predetermined temperature and velocity, and a plenum positioned in the support frame that is configured to guide the thermally controlled air from the source to the plurality of roll bars to heat or cool the plurality of roll bars to a predetermined temperature; and a plurality of printheads supported by the imaging device main frame, each printhead in the plurality being positioned in the main frame to provide a predetermined gap distance between the printhead and one of the roll bars of one of the modular roll bar assemblies.