Food packaging tray has reinforcing ribs which run from its rounded lower edge to its upper rim and are formed by grooves in inside of tray which terminate on level of its base

摘要

The food packaging tray (1) has reinforcing ribs (6) which run from its rounded lower edge (5) to its upper rim (2). These are formed by grooves in the inside of the tray which terminate on the level of its base (4).