You couldn't which is a bad concept. No matter if the cloak device bends light around the predator, it wouldn't be able to simply remove the predator's heat signature, unless it's also a cooling system, but it is very doubtful that it could function while at the same time not getting heated itself and plus, if the predator were clothed from head to toe in a refrigirator, he'd be a bit unconfortable while he's cloaked.