FIELD: packaging and storage.
SUBSTANCE: invention relates to one-way valve (1), food package (10) containing such a one-way valve, and a method of making such a one-way valve. Valve comprises first membrane (2) and second membrane (3), having smaller surface area than first membrane, and attached to lower surface of second membrane. Valve is configured to be attached to food package (10) and coating hole so that when pressure exceeds gas inside food package threshold value formed channel between food packaging and second membrane.
EFFECT: channel extends from said opening to peripheral edge of first membrane along second membrane.
12 cl, 9 dwg
