Patent ID: 7669530

Claim:
A UV curing assembly for a corrugated substrate flexographic printing system, comprising: a sheet transfer unit having a plurality of rollers extending partly through openings in a vacuum plate and having a vacuum source coupled to the openings to lift printed substrates into operative contact with the rollers, the sheet and rollers defining a printed substrate travel path along a lower surface of the sheet transfer unit, a plurality of heat sinks formed on the upper surface of the vacuum plate between the openings, a plurality of linear UV emitting devices positioned below and generally aligned with the substrate travel path, spaced laterally across the travel path, and positioned to emit UV radiation onto a plurality of curing zones across the travel path, and drive shafts extending between the plurality of rollers, wherein at least some of the plurality of heat sinks are at least partly positioned between the drive shafts and the upper surface of the vacuum plate, wherein the plurality of heat sinks comprise fins that are short enough to not interfere with the drive shafts.