Water tight tray for foodstuffs - is made from folded material with covering of water proof paper

摘要

The water tight tray is for packing foodstuffs and is made from a sheet of material which can be grooved and bent, covered with a sheet of waterproof paper. It forms a base with two pairs of parallel walls. The walls are doubled and the outer faces (5,5a) of the two inner sides have extensions (3,3a) each end with tongues (14,14',14a,14a') on hinges (15,15',15a,15a'). In the other direction there is a strip (9,9a) fixed centrally on the outer base. The tongues are trapezoidal in shape.