Abstract: A laminating machine for laminating layers of plastic film about an insert has cold feed rollers, a preheater and heated expeller rollers. The workpiece to be laminated is fed to the preheater by the feed rollers and is heated to a temperature just below the melting point of the adhesive on the plastic film. The heated workpiece is then fed to the hot expeller rollers which apply heat and pressure to finish melting the adhesive and squeeze any air bubbles out of the workpiece. Temperature controls assure that no melting and thus, no pre-lamination occurs at the preheater. The preheating step results in a laminating machine with high throughput of high quality laminations, even with inserts impervious to air.