A cover for a container, comprising a central web comprising a first web part and a second web part; and a hinge pivotally connecting the first and second web parts; wherein a first one of the web parts comprises at least one rib on an edge thereof facing the hinge, and a second one of the web parts
A cover for a container, comprising a central web comprising a first web part and a second web part; and a hinge pivotally connecting the first and second web parts; wherein a first one of the web parts comprises at least one rib on an edge thereof facing the hinge, and a second one of the web parts comprises at least one corresponding recess on an edge thereof facing the hinge.
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1. A cover for a container, the cover comprising: a central web comprising a first web part having a base surface and a second web part having a base surface; anda hinge pivotally connecting said first and second web parts;wherein, on a first side of said hinge, a first one of said web parts compris
1. A cover for a container, the cover comprising: a central web comprising a first web part having a base surface and a second web part having a base surface; anda hinge pivotally connecting said first and second web parts;wherein, on a first side of said hinge, a first one of said web parts comprises at least one rib extending along at least a part of a width of said first web part on an edge of said first web part facing the hinge, and, on a second side of said hinge, a second one of said web parts comprises at least one recess extending along at least a part of a width of said second web part on an edge of said second web part facing the hinge, said second web part further comprising a back wall separating said recess from a remaining portion of said second web part; said rib, said back wall and said recess being generally transverse to said base surface of their respective web parts; andwherein, in a closed position of the cover, the first and second web parts lay on a respective side of the hinge, with the rib and the back wall projecting up from said base surface of their respective web parts;said first web part being pivotable from the closed position to an open position by lifting up the first web part and tilting the first web part, about said hinge, towards the second web part until a top edge of the rib contacts the back wall and is thus made to slide down the recess by engagement with the back wall. 2. The cover of claim 1, wherein said central web comprises a platform at least at diagonally opposed corners thereof. 3. The cover of claim 1, wherein each one of said first and second web parts comprises a platform on an outer surface thereof, standing above the respective base surface thereof. 4. The cover of claim 1, wherein: in the closed position of the cover, the first and second web parts lay generally flat on a respective side of the hinge;said first web part being pivotable from the closed position to the open position until the top edge of the rib contacts the back wall and is thus made to slide down the recess by engagement with the back wall in an open locked position of the cover; andsaid first web part being pivotable from said open locked position by disengaging said rib from said recess. 5. The cover of claim 1, wherein said first web part has a first thickness, said second web part has a second thickness, and said hinge is a line extending from one side to an opposite side of the cover, said line having a third thickness, said third thickness being inferior to at least one of said first thickness and said second thickness. 6. The cover of claim 1, wherein said hinge is a line extending from one side to an opposite side of the cover and protruding either inwards or outwards from at least one of the base surface of the first web part and the base surface of the second web part. 7. The cover of claim 1, wherein said central web extends into a circumferential flange and a skirt dependent from said circumferential flange and generally perpendicular to the central web. 8. The cover of claim 1, wherein said central web extends into a circumferential flange and a skirt dependent from said circumferential flange and generally perpendicular to the central web, a length of said skirt along a circumference of at least one of said first and second web parts comprising a tear strip. 9. The cover of claim 1, wherein said central web extends into a circumferential flange and a skirt dependent from said circumferential flange and generally perpendicular to the central web, a length of said skirt along a circumference of at least one of said first and second web parts comprising a tear strip, said tear strip being defined by an upper score line and connecting score lines, the upper score line running along a length of the circumference of the cover, between the flange and the skirt, from a first connecting score line to an opposite connecting score line. 10. The cover of claim 1, wherein said first web part is one of: flat, convex and concave, and said second web part is one of: i) flat, ii) convex and iii) concave. 11. The cover of claim 1, wherein said central web extends into a circumferential flange and a skirt dependent from said circumferential flange and generally perpendicular to the central web, a length of said skirt along a circumference of a first one of said first and second web parts comprising a tear strip, said tear strip being defined by an upper score line and connecting score lines, the upper score line running along a length of the circumference of the cover, between the flange and the skirt, from a first connecting score line to an opposite connecting score line, said tear strip, when removed, leaving a tab on said first one of said first and second web parts and a length of said skirt on a second one of said first and second web parts. 12. The cover of claim 1, said cover being in one of: i) polypropylene and ii) polyethylene. 13. The cover of claim 1, wherein said at least one rib extends along at least part of the width of the cover, at a center of said width, aligned with said hinge. 14. A container and cover combination, comprising: a container with an opening; anda cover adapted to close said opening of the container in a closed position thereof;wherein said cover comprises a central web comprising a first web part and a second web part and a hinge pivotally connecting said first and second web parts;wherein, on a first side of said hinge, a first one of said web parts comprising at least one rib on an edge thereof aligned with the hinge; on a second side of said hinge, a second one of said web parts comprising at least one corresponding recess on an edge thereof aligned with the hinge and a back wall aligned with the recess, said recess being separated from a remaining portion of said second web part by said back wall; said rib, said back wall and said recess being generally transverse to an outer surface of their respective web parts; andwherein:in the closed position of the cover, the first and second web parts lay on a respective side of the hinge, with the rib and the back wall projecting up from the respective outer surfaces of the first and second web parts;said first web part being pivotable from the closed position to an open position allowing access to an inside of the container by pivoting said first web part about said hinge towards said second web part, until a top edge of the rib contacts the back wall and is thus made to slide down the recess by engagement with the back wall. 15. The container and cover combination of claim 14, wherein said cover comprises a platform at least at diagonally opposed corners thereof. 16. The container and cover combination of claim 14, said central web extends into a circumferential flange and a skirt dependent from said circumferential flange, said skirt generally perpendicular to the central web and configured to extend around an outside of the opening of the container, a length of said skirt along a circumference of a first one of said first and second web parts comprising a tear strip, said tear strip being defined by an upper score line and connecting score lines, the upper score line running along a length of the circumference of the cover, between the flange and the skirt, from a first connecting score line to an opposite connecting score line, said tear strip, when removed, leaving a tab on said first one of said first and second web parts and a length of said skirt on a second one of said first and second web parts. 17. A stackable container, comprising a body having a top opening for access to an inside of the container, and a cover, adapted to cover at least part of said top opening of the container; wherein said cover comprises a central web comprising a first web part and a second web part and a hinge pivotally connecting said first and second web parts; a first one of said first and second web parts comprising at least one rib of a first height extending along at least a part of a width of said first web part on an edge of said first web part facing the hinge on a first side of said hinge, and, on a second side of said hinge a second one of said first and second web parts comprising at least one corresponding recess extending along at least a part of a width of said second web part on an edge of said second web part facing the hinge, said recess being separated from a remaining web part of said second one of said first and second web parts by a back wall of a second height, said rib, said back wall and said recess being generally transverse to an outer surface of their respective web parts; and said cover comprising a platform at least at diagonally opposed corners thereof, said platform having a third height at least equal to a larger one of said first and second heights; andwherein, in a closed position of the cover, the first and second web parts lay on a respective side of the hinge, with the rib and the back wall projecting up from respective outer surfaces of the first and second web parts;said first web part being pivotable from the closed position to an open position by lifting up the first web part and tilting it, about said hinge, towards the second web part until a top edge of the rib contacts the back wall and is thus made to slide down the recess by engagement with the back wall. 18. The stackable container of claim 17, wherein: said first web part being pivotable from said open position by disengaging said rib from said recess. 19. The stackable container of claim 17, said central web extends into a circumferential flange and a skirt dependent from said circumferential flange, said skirt generally perpendicular to the central web and configured to extend around an outside of the opening of the container, a length of said skirt along a circumference of a first one of said first and second web parts comprising a tear strip, said tear strip being defined by an upper score line and connecting score lines, the upper score line running along a length of the circumference of the cover, between the flange and the skirt, from a first connecting score line to an opposite connecting score line, said tear strip, when removed, leaving a tab on said first of said first and second web parts and a length of said skirt on a second one of said first and second web parts. 20. The stackable container of claim 17, wherein said at least one rib extends along at least part of the width of the cover, at a center of said width, aligned with said hinge.
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