Push-bar Type Tray Sealer is ideal for medium to larger production runs of pre-made trays for seal only, vacuum & gas/modified atmosphere(MAP): vacuum extraction of all the air inside the tray, followed by the injection of the desired gas mixture or nitrogen. And vacuum skin(VSP): the packaging method consists in the vacuum extraction of all the air inside the tray. The film is then sealed inside the tray and along its edges. Drawn by the vacuum toward the product, the film fits around it like a second skin.