Packaging for food preparation comprises supple sheet delimiting enclosure containing food preparation, weld delimiting enclosure into two chambers, one having perforations communicating with ambient air

摘要

Packaging has supple sheet delimiting principal enclosure (22) confining food preparation (12). Weak weld (26) delimits enclosure into two initially independent chambers (30, 32). Principal chamber (30) contains food preparation and perforations (34) put auxiliary chamber in contact with air. As temperature rises, pressure in principal chamber rises and causes weld to rupture thus putting two chambers in communication.