WHAT ARE TRAY SEALERS? • Automated packaging machines that apply plastic film lids to trays of varying  materials, sizes, shapes and depths. • Also known as heat sealers, top sealers or tray lidding machines. • The versatility of this technology makes it the optimal solution for packaging fresh  produce, meats, frozen meals, ready-made meals, snacks and more. • In India, their application is growing in the snacks and sweetmeats section with a  large number of mithai and savoury items being packaged in thermoformed trays.