Pressure vacuum release hermetic valve for rigid container packages

摘要: A rigid container package, such as made of tin, metal, etc., having an interior for holding particulate material, food stuffs (like coffee beans), under vacuum, and which includes a mouth to be opened provide access the contents package. The package is preferably formed from material in form container, tin box, has affixed thereon one-way pressure-equalizing valve. valve displaceable rubber disk located on seat arranged operate that any gasses within are allowed vent exterior by passing through interface between seat, while ambient atmosphere substantially precluded entering into then engages isolate exterior. layer silicone oil or similar provided facilitate operation attached via aperture slightly smaller than mating portion valve, can passed aperture, expanded firmly rest against wherein friction (resulting interference fit) helps seal adhere container.