A solid thermoformed plastic 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 t
A solid thermoformed plastic 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 solid thermoformed plastic tray comprising: a. a base, wherein said base is substantially rectangular in shape;b. a plurality of sidewalls extending upwardly and slightly outwardly from said base;c. a primary flange integrally joined to the upper edges of the sidewalls and extending outwardly a
1. A solid thermoformed plastic tray comprising: a. a base, wherein said base is substantially rectangular in shape;b. a plurality of sidewalls extending upwardly and slightly outwardly from said base;c. a primary flange integrally joined to the upper edges of the sidewalls and extending outwardly around the upper periphery of the sidewalls;d. a rim comprising a flap extending downwardly and tapering slightly outwardly from the outer periphery of the primary flange; ande. a secondary flange comprising an overhanging portion extending outwardly from the lower edge of the rim; 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 tray of claim 1, wherein said ribs are evenly numbered and are symmetrically disposed in each pair of opposed sidewalls with respect to the median line thereof. 3. The tray of claim 2, wherein said tray further comprises a plurality of sidewall ribs disposed and longitudinally spaced apart along said tray sidewalls and extend inwardly from the base up to the inner edge of the primary flange. 4. The tray of claim 3, wherein said sidewall ribs are further disposed in at least part of the tray base surface. 5. The tray of claim 4, wherein at least part of said sidewall ribs extend across said base in a direction about perpendicular to at least one pair of opposed sidewalls. 6. The tray of claim 5, wherein said sidewall ribs extend perpendicular to the longitudinal sidewalls. 7. The tray of claim 5, wherein said sidewall ribs are intersected with or superposed to additional ribs extending on at least part of said tray base perpendicularly thereto. 8. The tray of claim 1, wherein said tray is transparent. 9. The tray 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. 10. The tray of claim 1, wherein the angle between the primary flange and the rim is between 75 and 90 degrees. 11. The tray of claim 1, wherein the tray sidewalls taper outwardly from the base at an angle of up to 7 degrees. 12. The tray of claim 1, wherein the primary flange and the secondary flange are parallel to each other. 13. The tray of claim 1, wherein said ribs are in the shape of a trapezoid. 14. The tray of claim 1, wherein the tray comprises rounded corners in the areas of junction between two consecutive sidewalls.
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이 특허에 인용된 특허 (8)
Zettle Jeffey J. ; Hodge Donald E. ; Schaper Eric B., Container having a selectively detachable lid including a rigid tab member.
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