Package with lid sealing system

1. A package comprising

a container formed to include a product-storage region and a brim bordering an opening into the product-storage region and

a lid adapted to mate with the brim of the container to close the opening into the product-storage region formed in the container, the lid including a sheet-support ring and a membrane sheet and wherein the sheet-support ring is configured to mate with the brim of the container when the lid is mounted on the container to extend around the opening into the product-storage region and to include an inwardly facing wall arranged to face toward the brim of the container and the membrane sheet has an outer surface bonded permanently to the sheet-support ring to form the lid and an inner surface configured to provide means for mating temporarily and repeatedly with the brim of the container to close the opening into the product-storage region and establish a sealed connection between the membrane sheet and the brim of the container lid when the sheet-support ring of the lid is mated with the brim of the container so that any product stored in the product-storage chamber is retained in a sealed chamber defined by the container and the lid, wherein the membrane sheet includes a perimeter edge arranged to extend between the outer and inner surfaces and to mate with an annular edge-support surface included in the sheet-support ring and arranged to face away from the product-storage region of the container and to be below the opening when the lid and brim are mated.

2. The package of claim 1 , wherein the annular edge-support surface has a frustoconical shape.

3. A package comprising

a container formed to include a product-storage region and a brim bordering an opening into the product-storage region and

a lid adapted to mate with the brim of the container to close the opening into the product-storage region formed in the container, the lid including a sheet-support ring and a multi-layer membrane sheet and wherein the sheet-support ring is configured to mate with the brim of the container when the lid mounted on the container to extend around the opening into the product-storage region and to include an inwardly facing wall arranged to face toward the brim of the container and the membrane sheet has an outer surface bonded permanently to the sheet-support ring to form the lid and an inner surface configured to provide means for mating temporarily and repeatedly with the brim of the container to close the opening into the product-storage region and establish a sealed connection between the membrane sheet and the brim of the container lid when the sheet-support ring of the lid is mated with the brim of the container so that any product stored in the product-storage region is retained in a sealed chamber defined by the container and the lid, wherein the membrane sheet includes a perimeter edge arranged to extend between the outer and inner surface and to mate with an annular edge-support surface included in the sheet-support ring and wherein the perimeter edge of the membrane sheet is coupled permanently to the annular edge-support surface of the sheet-support ring.

4. The package of claim 3 , wherein the sheet-support ring includes an exterior surface facing away from the brim of the container and an interior surface facing toward the brim of the container and lying between the exterior surface and the brim of the container and wherein the interior surface includes the inwardly facing wall and the annular edge-support surface.

5. The package of claim 1 , wherein the inwardly facing wall has a concave shape.

6. A package comprising

a container formed to include a product-storage region and a brim bordering an opening into the product-storage region, the brim having a top and a side and

a lid adapted to mate with the brim of the container to close the opening into the product-storage region formed in the container,

wherein the lid includes a cup-shaped membrane sheet having a substantially planar center plate and a rim coupled to and arranged to extend around a peripheral portion of the substantially planar center plate to form a single downwardly opening cavity bounded by the rim and the substantially planar center plate,

wherein the lid further includes a sheet-support ring arranged to surround the brim of the container when the lid is mounted on the container and to bond permanently with an outer surface of the rim of the cup-shaped membrane sheet to place the downwardly opening cavity formed in the cup-shaped membrane sheet in communication with the product-storage region formed in the container when the lid is mated with the brim of the container, and

wherein the rim of the membrane sheet further includes an inner surface configured to mate with the brim of the container to establish a sealed connection between the membrane sheet and the brim at the top and side of the brim and position the center plate to close the opening into the product-storage region and to place the peripheral portion of the center plate above and in mating relation with a confronting upwardly facing surface of the brim of the container while the sheet-support ring is mated with the brim.

7. The package of claim 6 , wherein the rim of the membrane sheet is a multi-layer component comprising an outer bed providing a portion of the outer surface, an inner bed providing a potion of the inner surface, and a core interposed between and coupled to the inner and outer beds, and wherein each of the outer bed, core, and inner bed is made of a different material.

8. The package of claim 6 , wherein the outer surface of the outer bed has a convex shape and the inner surface of the inner bed has a concave shape.

9. The package of claim 6 , wherein the membrane sheet includes a perimeter edge arranged to extend between the outer and inner surfaces and to mate with an annular edge-support surface included in the sheet-support ring.

10. The package of claim 9 , wherein the annular edge-support surface has a frustoconical shape.

11. The package of claim 9 , wherein the perimeter edge of the membrane sheet is coupled permanently to the annular edge-support surface of the sheet-support ring.

12. The package of claim 11 , wherein the sheet-support ring includes an exterior surface facing away from the brim of the container and an interior surface facing toward the brim of the container and lying between the exterior surface and the brim of the container and wherein the interior surface includes the inwardly facing wall and the annular edge-support surface.

13. The package of claim 12 , wherein the inwardly facing wall has a concave shape.

14. The package of claim 6 , wherein the sheet-support ring includes an annular band having a top surface and a bottom surface and an annular lid-retention lug appended to the annular band and arranged to extend in a radially inward direction to lie under the brim of the container when the lid is mounted on the container to provide means for trapping the rim of the membrane sheet between the annular lid-retention lug and the brim of the container to block removal of the lid from a mounted position on the container.

15. The package of claim 6 , wherein the membrane sheet is a multi-layer component comprising an outer bed providing the outer surface, an inner bed providing the inner surface, and a core interposed between and coupled to the outer and inner beds and wherein each of the outer bed, core, and inner bed is made of a different material.