초록 ▼

A container comprising a base (12) and lid (14) each formed of sheet plastic, wherein after food is loaded into a base cavity (20) and the lid is closed, the lid resists opening. To open the lid, a move-away tab (64) lying along the base rim portion (30) is moved by tearing along at least one line (

A container comprising a base (12) and lid (14) each formed of sheet plastic, wherein after food is loaded into a base cavity (20) and the lid is closed, the lid resists opening. To open the lid, a move-away tab (64) lying along the base rim portion (30) is moved by tearing along at least one line (70) so a lid rim part (50) is exposed and can be grasped to lift the lid. The base has an outer raised rib (32) that blocks access to the lid rim part until the tab, which lies between two gaps (62, 63) in the outer rib, is moved out of the way. The base also has an inner raised rib (34) that projects into a groove (46) in the lid to form a seal.

대표청구항 ▼

1. A container having a base and lid formed of at least one sheet, wherein said base and lid are centered on a vertical axis, wherein said base has a base rim portion with an upward-facing base support wall that extends at least 270° around said axis, and said lid has a lid rim portion with a lid ri

1. A container having a base and lid formed of at least one sheet, wherein said base and lid are centered on a vertical axis, wherein said base has a base rim portion with an upward-facing base support wall that extends at least 270° around said axis, and said lid has a lid rim portion with a lid rim part that lies on said base support wall, with said lid rim part having an outer lid rim edge, wherein: said base rim portion has a raised base outer rib that lies immediately radially outside said base support wall, to block access to said lid rim part, said base outer rib extending along substantially the entire base rim portion except that said base outer rib has a pair of gaps;said base rim portion has a primarily radial tear gap line lying in at least one of said gaps and has a pivot gap line lying in the other of said gaps and said base rim portion forms a primarily circumferentially-extending tab between said gap lines and along said base support wall;said base rim portion also has a separable line extending primarily circumferentially between said gap lines and lying radially inward of said tab, so that after said tear gap line is torn said tab can be moved to expose the lid rim part between said gap lines. 2. The container described in claim 1 wherein: said base outer rib has a radially inner side which is vertically undercut, and said lid rim edge lies below part of said raised outer rib inner side, to prevent the lid rim edge from being raised before the tear gap line is torn and the tab is moved. 3. The container described in claim 1 wherein: said separable line that extends between said gap lines, is a slit having a radial width of no more than one millimeter, whereby to resist a person pushing up the lid rim part through the slit. 4. The container described in claim 1 wherein: said separable line that extends between said gap lines, is a tear line that must be torn to separate and pivot said portion of said base rim. 5. The container described in claim 1, wherein: said lid has a top that forms an upwardly-facing projection that is centered on said axis and that has horizontal width and length dimensions that are each more than one-third the diameter of said lid, and said base has a bottom wall with a lower surface forming an upward recess that closely receives said lid projection when a plurality of containers are stacked. 6. The container described in claim 1 wherein: said raised base outer rib has a radially inner side with a radially inward opening slot with a slot top edge;said lid rim part is formed with a radially-outwardly projecting latch that fits into said inward opening slot only by deflection of the latch. 7. The container described in claim 1 wherein: said base support wall has a flat base upper surface, and said lid rim part has a flat lid lower surface that extends parallel to and adjacent to said flat base upper surface. 8. The container described in claim 1 wherein: said base support wall has a base upper surface; said lid has a primarily vertical wall that lies radially inside said lid rim part to press said lid rim part firmly against said base upper surface. 9. The container described in claim 1 wherein: said base support wall has a plurality of dimples. 10. The container described in claim 1 wherein: said base rim portion has a raised inner rib that is spaced radially inward of said raised base outer rib, with said base support wall extending between said raised outer rib and said raised inner rib;said lid has walls forming a downwardly-opening lid groove that receives said raised base inner rib in an interference fit to form a seal thereat. 11. The container described in claim 10 wherein: said raised base inner rib has radially inner and outer rib walls that each extends primarily vertically;said walls forming a downwardly-opening lid groove include radially opposite inner and outer groove walls, said inner and outer groove walls extend primarily vertically and converge in downward direction and respectively engage said inner and outer rib walls of said raised base inner rib, whereby to hold down the lid and form a seal. 12. A container having base and lid elements formed of at least one sheet, wherein said base and lid elements are centered on a vertical axis, wherein said base element has a base rim portion and said lid element has a lid rim portion, wherein: the rim portion of a first of said elements forms a largely vertical projection part with radially spaced inner and outer projection walls, said projection part extending at least 270°around said axis;the rim portion of a second of said elements forms a largely vertical groove part that extends at least 270° around said axis and that receives said projection, said largely vertical groove having radially inner and outer groove walls that engage said inner and outer projection walls;said base rim portion has a raised base outer rib radially outward of said projection part and of said groove part when the lid is closed on the base, and said base rim portion forms a horizontal base support wall extending between said base outer rib and the corresponding one of said projection and groove parts;said lid has a lid rim part with a radially outer lid rim edge on said base support wall;said base outer rib has a pair of circumferentially-spaced gaps, each of the gaps having a gap line defined therein, with one of said gap lines forming a gap tear line, and with a separation line radially inward of said base outer rib and extending between said gap lines, to allow access to said lid rim edge by moving a tab that lies radially outward of said separation line and between said gap lines. 13. The container described in claim 12, wherein: said base forms said projection part with said projection part projecting upward and said lid forms said groove part with said groove part opening downward;said radially inner and outer walls of said projection part converge in a downward direction and said radially inner and outer walls of said groove part converge in a downward direction, to help keep said lid closed on said base. 14. The container described in claim 12, wherein: said base outer rib has a radially inner wall that is vertically undercut, and said radially outer lid rim edge is located close enough to said raised outer rib that when said tab has not been moved said inner wall of said base outer rib inhibits lifting said lid rim edge. 15. The container described in claim 12 wherein: said base rim portion includes a horizontal base support wall, and said lid rim portion includes a lid rim part that lies adjacent to said base support wall, said lid rim part being connected by a curve to said groove radially outer wall and being pressed firmly against said horizontal base support wall. 16. A container having a base and lid formed of at least one sheet, wherein said base and lid are centered on a vertical axis, wherein said base has a base rim portion with an upward-facing base support wall that extend at least 270° around said axis, and said lid has a lid rim portion with a lid rim part that lies on said base support wall, with said lid rim part having an outer lid rim edge, wherein: said base rim portion has a raised base outer rib that lies immediately radially outside said base support wall, to block access to said lid rim part, said base outer rib extending along substantially the entire base rim portion except that said base outer rib has a pair of gaps;said base rim portion has a primarily radial tear gap line lying in at least one of said gaps and has a pivot gap line lying in the other of said gaps and said base rim portion forms a primarily circumferentially-extending tab between said gap lines and along said base support wall;said base rim portion also has a separable line extending primarily circumferentially between said gap lines and lying radially inward of said tab, so that after said tear gap line is torn said tab can be moved to expose the lid rim part between said gap lines;said base outer rib and said lid rim part form means for allowing said lid to close on said base and for thereafter preventing the lid from being grasped until said radial tear gap line is torn and said tab is moved out of the way of grasping said lid rim part to raise it. 17. The container described in claim 16 wherein: said raised base outer rib has radially outer and inner sides with said radially inner side having a slot that opens radially inward, said slot having a slot top edge;said lid rim part is formed with a radially-outwardly projecting latch that fits into said inward opening slot by upward and inward deflection of the latch as said cover is closed. 18. The container described in claim 16 wherein: along the length of said tab said base outer rib has a radially outer side, and said base outer rib has a radially inner side with a lower portion and with an upper portion that overhangs the lower portion so said radially inner side is vertically undercut, and said lid rim edge lies below said overhang of said rib inner side to prevent the lid rim edge from being raised before the tear gap line is torn and the tab is moved. 19. A container having a base and lid formed of at least one deformed sheet of material, wherein said base and lid are centered on a vertical axis, wherein said base has a base rim portion and said lid element has a lid rim portion, wherein: said base rim portion has a base support wall with an upper surface, and said lid rim portion has a lid rim part with a lower surface that extends parallel to and against said base upper surface when said lid has been closed on said base;said base rim portion has an upward base rib that lies radially outward of said lid rim part to block access to said lid rim part, said lid rim part having tab means for providing access to said lid rim part and for indicating that such access has been provided. 20. The container described in claim 19 wherein: said tab means comprises a pair of gaps in said base rib, primarily radially extending gap lines extending along each of said gaps with one gap line being a tear line and the other being pivotable, and with a separation line extending circumferentially between radially inner ends of said gap lines, said separation line lying radially inward of part of said lid rim part.