A package including a tray (10) provided with a base (11), a plurality of sidewalls (12, 13, 14, 15) extending upwardly and slightly outwardly from said base (11), a primary flange (20) integrally joined to the upper edges of the sidewalls (12, 13, 14, 15) and extending outwardly all around the uppe
A package including a tray (10) provided with a base (11), a plurality of sidewalls (12, 13, 14, 15) extending upwardly and slightly outwardly from said base (11), a primary flange (20) integrally joined to the upper edges of the sidewalls (12, 13, 14, 15) and extending outwardly all around the upper periphery of the sidewalls (12, 13, 14, 15), a rim (21), i.e., a downward flap extending downwardly and tapering slightly outwardly from the outer periphery of the primary flange (20), and a secondary flange (22), i.e., an overhanging portion extending outwardly from the lower edge of the rim (21), said tray being characterized in that a plurality of strengthening ribs (23) extend substantially vertically along the rim (21) and outwardly with respect to the tray body. The trays (10) according to the present invention have an improved rigidity and improved resistance to deformation and bending, improvements that have been achieved without increasing the amount of plastic material used for the manufacture of the tray (10) but relying only on a specific geometry thereof.
대표청구항▼
1. A package comprising: a. a solid thermoformed plastic tray comprising: i. a base, wherein said base is substantially rectangular in shape;ii. a plurality of sidewalls extending upwardly and slightly outwardly from said base;iii. a primary flange integrally joined to the upper edges of the sidewal
1. A package comprising: a. a solid thermoformed plastic tray comprising: i. a base, wherein said base is substantially rectangular in shape;ii. a plurality of sidewalls extending upwardly and slightly outwardly from said base;iii. a primary flange integrally joined to the upper edges of the sidewalls and extending outwardly around the upper periphery of the sidewalls;iv. a rim comprising a flap extending downwardly and tapering slightly outwardly from the outer periphery of the primary flange; andv. a secondary flange comprising an overhanging portion extending outwardly from the lower edge of the rim;b. a product loaded in said tray;c. a lidding film sealed to said tray to enclose said product;wherein said tray comprises a plurality of ribs extending substantially vertically along said rim and outwardly from the tray body, extending from the primary flange to the secondary flange. 2. The package of claim 1, wherein said lidding film is sealed to said tray flange. 3. The package of claim 1, wherein said lidding film is heat shrinkable. 4. The package of claim 1, wherein said lidding film comprises a combination of an innermost oxygen permeable film and an outermost oxygen barrier film. 5. The package of claim 4, wherein at least one of said innermost and outermost films is heat shrinkable. 6. The package of claim 1, wherein said lidding film has oxygen barrier properties. 7. The package of claim 1, wherein said product is a fresh meat product. 8. The package of claim 1, wherein the angle between the primary flange and the rim is between 75 and 90 degrees. 9. The package of claim 1, wherein the tray sidewalls taper outwardly from the base at an angle of up to 7 degrees. 10. The package of claim 1, wherein the primary flange and the secondary flange are parallel to each other. 11. The package of claim 1, wherein said ribs are in the shape of a trapezoid. 12. The package of claim 1, wherein the tray comprises rounded corners in the areas of junction between two consecutive sidewalls. 13. The package of claim 1, wherein said package is a vacuum skin package. 14. The package of claim 1, wherein said package is a modified atmosphere package. 15. The package of claim 1, wherein said tray further comprises a plurality of sidewall ribs disposed and longitudinally spaced along the tray sidewalls and extending inward from the base up to the inner edge of the primary flange. 16. The package of claim 15, wherein the sidewall ribs are even in number on each sidewall and symmetrically positioned with respect to the median line thereof. 17. The package of claim 1, wherein said tray is monolayered or multilayered and comprises at least one bulk layer comprising polypropylene, polyester, polyamide, polystyrene, polyvinyl chloride, or combinations thereof. 18. The package of claim 1, wherein said tray is transparent.
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