A box tray fill seal machine is a type of packaging equipment that is designed to automatically fill pre-made trays or boxes with product, seal the tray or box with a film or lid, and then output the sealed package for distribution. 

This type of machine is commonly used in the food industry for packaging items such as ready-made meals, snacks, or produce. The machine can be customized to accommodate different tray or box sizes, as well as different sealing options such as heat sealing or vacuum sealing. 

By using a box tray fill seal machine, manufacturers can increase production efficiency and ensure consistent packaging quality.