A plate container with detachable cover is disclosed. The container includes a base in the form of a plate and a cover. The plate and the cover include first and second closure portions, respectively, which are engageable with each other to maintain the cover in a secure position relative to the bas
A plate container with detachable cover is disclosed. The container includes a base in the form of a plate and a cover. The plate and the cover include first and second closure portions, respectively, which are engageable with each other to maintain the cover in a secure position relative to the base and also forms a substantially leak-proof seal. The cover can include gripping tabs for facilitating the separation of the cover from the base and permit container venting. The plastic container is suited for microwave cooking, machine dishwashing, and freezer use.
대표청구항▼
What is claimed is: 1. A container comprising: a base, the base having a plate-like configuration, the base having an exterior surface and an interior surface, the base including a first closure portion and a first stacking element extending from the exterior surface, wherein the first closure port
What is claimed is: 1. A container comprising: a base, the base having a plate-like configuration, the base having an exterior surface and an interior surface, the base including a first closure portion and a first stacking element extending from the exterior surface, wherein the first closure portion includes an inner wall, a retention bead, and an outer wall, the retention bead between the inner and the outer walls, the inner and outer walls joined to the retention bead at an inner and an outer shoulder, respectively, the inner wall and the outer wall in converging relationship with each other; and a cover, the cover having an interior surface and an exterior surface, the cover including a dome portion, a second closure portion and a second stacking element, the interior surface of the dome portion being substantially concave, the second closure portion being adapted for scaling engagement with the first closure portion of the base so that when the first and second closure portions are engaged with each other, the cover and the base define a substantially sealed storage area; wherein the base is disposable in the interior of the dome portion of the cover such that a portion of the exterior surface of the base is in contact with a portion of the interior surface of the cover and the first stacking element is engaged with the second stacking element. 2. The container as described in claim 1 wherein said first closure portion has a first visual indicator element comprising a first color; and wherein said second closure portion has a second visual indicator element comprising a second color; wherein when the first and second closure portions are engaged with each other, the first and second visual indicator elements including the first and second colors cooperate with each other to provide a third color indicating closure of the cover upon the base. 3. The container as described in claim 2 wherein the first color is translucent blue, the second color is opaque yellow, and the third color is green. 4. The container as described in claim 2 wherein the first visual indicator element includes a first pattern applied to the first closure portion, the second visual indicator element includes a second pattern applied to the second closure portion, and when the first closure portion engages the second closure portion, the first pattern and the second pattern cooperate to produce a third pattern. 5. The container as described in claim 2 wherein the first closure portion includes an inner wall, a retention bead, and an outer wall, the retention bead between the inner and the outer walls, the inner and outer walls joined to the retention bead at an inner and an outer shoulder, respectively, the inner wall and the outer wall in converging relationship with each other. 6. The container as described in claim 5 wherein the second closure portion includes an inner wall, a retention bead, and an outer wall, the retention bead between the inner and the outer walls, the inner and outer walls joined to the retention bead at an inner and an outer shoulder, respectively, the inner wall and the outer wall in converging relationship with each other, and the second closure portion being relatively larger than the first closure portion. 7. The container as described in claim 1 wherein the second closure portion includes an inner wall, a retention bead, and an outer wall, the retention bead between the inner and the outer walls, the inner and outer walls joined to the retention bead at an inner and an outer shoulder, respectively, the inner wall and the outer wall in converging relationship with each other, and the second closure portion being relatively larger than the first closure portion. 8. The container as described in claim 7 wherein the cover includes a pair of nest lugs, the nest lugs being disposed in opposing relation to each other adjacent the inner and outer walls of the first closure portion, respectively, and the nest lugs engageable with the shoulders of a second cover when the second cover is stacked upon the first cover. 9. The container as described in claim 1 wherein the base has a material wall thickness of about 0.010 inches to about 0.050 inches. 10. The container as described in claim 1 wherein the cover has a material wall thickness of about 0.010 inches to about 0.050 inches. 11. The container as described in claim 1 wherein said container is made by a thermoforming process. 12. The container as described in claim 1 wherein the first stacking element is in the form of a ring. 13. A container comprising: a base, the base having a plate-like configuration, the base including a substantially planer bottom wall portion and a side wall portion extending upwardly and outwardly from the bottom wall portion and joined to a peripheral first closure portion and a flange, the first closure portion including an inner wall, an outer wall, and a retention bead between the inner and outer walls, the inner and outer walls joined to the retention bead at an inner and outer shoulder, respectively, the inner and outer walls in a converging relationship with each other, the flange extending from the first closure portion and defining a perimeter of the base, the flange being resiliently flexible; a cover, the cover including a second closure portion having at least one gripping tab, the second closure portion adapted for sealing engagement with the first closure portion of the base so that when the first and second closure portions are occluded, the cover and the base define a substantially sealed storage area; wherein when the first and second closure portions are sealingly engaged, the flange of the base is closely adjacent the cover, the flange of the base capable of being flexed away from the cover to facilitate the removal of the cover from the base; and wherein the base includes a third shoulder and a pair of nest lugs, including a first inner nest lug and a second outer nest lug, the third shoulder is disposed between the first inner nest lug and the side wall the nest lugs being disposed in opposing relation to each other adjacent the inner and outer walls of the first closure portion, respectively, the first inner nest lug extends upwardly and outwardly from the third shoulder at an oblique angle thereto and merges into the inner wall, the second outer nest lug extends outwardly and downwardly from the outer wall, and the nest lugs engageable with the shoulders of a second base when the first base is stacked upon the second base. 14. The container as described in claim 13 wherein the second closure portion includes an inner wall, a retention bead, and an outer wall, the retention bead between the inner and the outer walls, the inner and outer walls joined to the retention bead at an inner and an outer shoulder, respectively, the inner wall and the outer wall in converging relationship with each other, and the second closure portion being relatively larger than the first closure portion. 15. The container as described in claim 14 wherein the cover includes a pair of nest lugs, the nest lugs being disposed in opposing relation to each other adjacent the inner and outer walls of the first closure portion, respectively, and the nest lugs engageable with the shoulders of a second cover when the second cover is stacked upon the first cover. 16. The container as described in claim 13 wherein the gripping tab is reinforced. 17. The container as described in claim 16 wherein the gripping tab is reinforced by a rib, and the rib provides a stiffening effect and leverage in separating the cover from the base. 18. The container as described in claim 13 wherein the base includes a first stacking element, the cover includes a second stacking element, and the first stacking element of a first container engages the second stacking element of a second container when said first container is stacked upon said second container. 19. The container as described in claim 18, wherein the second stacking element extends from the interior surface. 20. The container as described in claim 19 wherein the second stacking element is in the form of a ring. 21. The container as described in claim 12 wherein the first and second stacking elements are complementary such that the first stacking element can be accepted by the second stacking element to assist in stacking multiple containers. 22. The container as described in claim 13 wherein the base has a material wall thickness of about 0.010 inches to about 0.050 inches. 23. The container as described in claim 13 wherein the cover has a material wall thickness of about 0.010 inches to about 0.050 inches. 24. The container as described in claim 13 wherein said container is made by a thermoforming process. 25. A container comprising: a base, the base having a plate-like configuration, the base having an exterior surface and an interior surface, the base including a first closure portion and a first stacking element extending from the exterior surface; and a cover, the cover having an interior surface and an exterior surface, the cover including a dome portion, a second closure portion and a second stacking element, the interior surface of the dome portion being substantially concave, the second closure portion being adapted for sealing engagement with the first closure portion of the base so that when the first and second closure portions are engaged with each other, the cover and the base define a substantially sealed storage area; wherein the base is disposable in the interior of the dome portion of the cover such that a portion of the exterior surface of the base is in contact with a portion of the interior surface of the cover and the first stacking element is engaged with the second stacking element, wherein the base includes a pair of nest lugs, the nest lugs being disposed in opposing relation to each other adjacent the inner and outer walls of the first closure portion, respectively, and the nest lugs engageable with the shoulders of a second base when the first base is stacked upon the second base. 26. A container comprising: a base, the base having a plate-like configuration, the base having an exterior surface and an interior surface, the base including a first closure portion and a first stacking element extending from the exterior surface; a cover, the cover having an interior surface and an exterior surface, the cover including a dome portion, a second closure portion and a second stacking element, the interior surface of the dome portion being substantially concave, the second closure portion includes an inner wall, a retention bead, and an outer wall, the retention bead between the inner and the outer walls, the inner and outer walls joined to the retention bead at an inner and an outer shoulder, respectively, the inner wall and the outer wall in converging relationship with each other, the second closure portion being adapted for sealing engagement with the first closure portion of the base so that when the first and second closure portions are engaged with each other, the cover and the base define a substantially sealed storage area; and wherein the base is disposable in the interior of the dome portion of the cover such that a portion of the exterior surface of the base is in contact with a portion of the interior surface of the cover and the first stacking element is engaged with the second stacking element. 27. The container as described in claim 26, wherein the cover includes a gripping tab, the gripping tab joined to the second closure portion. 28. The container as described in claim 27 wherein the gripping tab is reinforced. 29. The container as described in claim 28 wherein the gripping tab is reinforced by a rib, and the rib provides a stiffening effect and leverage in separating the cover from the base.
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