Metal lid for container of food stored under vacuum has peripheral rim filled with resin sealant, central aperture closed by ring pull made from foil glued to lid allowing vacuum to be released

摘要

The metal lid for a container (14) of food stored under vacuum has a peripheral rim (11) filled with resin sealant (13). A central aperture (17), closed by a ring pull (18) allows the vacuum to be released. The ring pull is made from foil glued to the lid.