Tamper evident closure and container

• US 4,934,557 A
• Filed: 12/05/1988
• Issued: 06/19/1990
• Est. Priority Date: 12/05/1988
• Status: Expired due to Fees

• Current Assignee: SealRight Co., Inc. (Huhtamaki Oyj)
• Original Assignee: SealRight Co., Inc. (Huhtamaki Oyj)
• Inventors: Smith, Ernest L.
• Primary Examiner(s): Garbe, Stephen P.
• Assistant Examiner(s): Stucker, Nova
• Application Number:
  US07/279,930
• Time in Patent Office: 561 Days
• Field of Search: 220/266, 220/270, 220/276, 220/306, 220/307, 215/253, 215/254, 215/255, 215/256
• US Class Current: 220/276
• CPC Class Codes: B65D 2401/15 Tearable part of the closure B65D2401/60 takes precedence
• CPC Class Codes: B65D 2543/00092 circular
• CPC Class Codes: B65D 2543/00296 Plastic
• CPC Class Codes: B65D 2543/00509 Cup
• CPC Class Codes: B65D 2543/00537 on the outside, or a part turned to the outside of the mouth of the container
• CPC Class Codes: B65D 2543/00546 NO contact
• CPC Class Codes: B65D 2543/00555 on both the inside and the outside
• CPC Class Codes: B65D 2543/0062 Groove or hollow bead
• CPC Class Codes: B65D 2543/00657 U-shaped or inverted U
• CPC Class Codes: B65D 2543/00685 Totality
• CPC Class Codes: B65D 2543/0074 Massive bead
• CPC Class Codes: B65D 2543/00796 Totality
• CPC Class Codes: B65D 43/0252 leaving only an inside snap after removal of the tamper element

Abstract

A tamper evident food package comprising a container and a removable closure. A plurality of locking members are provided on the closure and engage a downturned lip of the container to prevent removal of the closure while in place. The locking members form part of a detachable tear strip which may be detached to permit removal of the closure. Detachment of the tear strip provides visual indication of unauthorized opening of the food package.

Claims

1. A tamper evident closure for a container having a sidewall terminating in an upper rim which has a downturned lip spaced outwardly from the container sidewall to present an open bottom channel between the lip and sidewall, said closure comprising:

a lid sized for covering an open top of the container when coupled therewith and having a peripheral edge;

means on said peripheral edge of the lid for releasably holding the lid on the container;

a detachable strip extending circumferentially around said peripheral edge of the lid and including a plurality of circumferentially spaced locking members and wall means extending between adjacent locking members, each locking member including a downwardly projecting skirt and a wall connected with said skirt and cooperating therewith to present an open top channel in which said lip of the rim is disposed when the lid is applied to the container, with said wall extending into said open bottom channel to effect interlocking between said open top channel and said open bottom channel to prevent release of the closure from the container unless said strip is at least partially detached from the lid; and

means carried on said wall means for engaging said lip between said locking members in a manner to hold the closure in sealing engagement with the container.

2. The closure of claim 1, wherein said strip is detachable from said lid along a weakened detachment line.

3. The closure of claim 2, wherein said detachment line includes a plurality of circumferentially spaced cuts separated at their adjacent ends by frangible webs.

4. The closure of claim 2, including a tab on said strip to provide a finger grip on said strip for removal thereof.

5. The closure of claim 1, wherein said releasable holding means on said peripheral edge includes a peripheral rib for releasable engagement with a complimentally sized and shaped groove formed in the container sidewall.

6. The closure of claim 2, including an outwardly projecting flange at the peripheral edge of said lid coupled with said skirt, wherein said flange includes said weakened detachment line and wherein said detachable strip comprises said skirt and the portion of said flange located on one side of said detachment line.

7. The closure of claim 6, including a plurality of circumferentially spaced cuts in said flange, each cut separated from an adjacent cut by a frangible web with said detachment line extending through said frangible web.

8. A tamper evident closure for a container having a sidewall terminating in an upper rim which includes a downwardly projecting lip spaced from said container sidewall to present an open bottom channel, said closure comprising:

a discoidal lid sized for covering an open top of the container when coupled therewith and having a peripheral edge;

a lid sidewall extending above said lid at said peripheral edge and releasably engageable with the container sidewall; and

a detachable strip extending circumferentially around said peripheral edge of the lid and including a plurality of circumferentially spaced locking members and wall means extending between adjacent locking members, each locking member including a downwardly projecting skirt and a wall connected with said skirt and cooperating therewith to present an open top channel in which said lip of the rim is disposed when the lid is applied to the container, with said wall extending into said open bottom channel to effect interlocking between said open top channel and said open bottom channel to prevent release of the closure from the container unless said strip is at least partially detached from the lid.

9. The closure of claim 8, wherein said strip is detachable from said lid sidewall along a weakened detachment line.

10. The closure of claim 9, wherein said detachment line includes a plurality of circumferentially spaced cuts separated at their adjacent ends by frangible webs.

11. The closure of claim 9, including a tab on said strip to provide a finger grip on said strip for removal thereof.

12. The closure of claim 8, wherein said lid sidewall includes a peripheral rib for releasable engagement with a complimentally sized and shaped groove formed in the container sidewall.

13. The closure of claim 9, including an outwardly projecting flange at the upper edge of said lid sidewall coupled with said skirt, wherein said flange includes said weakened detachment line and wherein said detachable strip comprises said skirt and the portion of the flange located on one side of said detachment line.

14. The closure of claim 13, including a plurality of circumferentially spaced cuts in said flange, each cut separated from an adjacent cut by a frangible web with said detachment line extending through said frangible web.

15. A tamper evident package for food such as dairy products, said package comprising:

a container having a sidewall terminating in an upper rim, said sidewall having an inner surface with a circumferentially extending groove formed therein;

a lip extending outwardly and downwardly from said upper rim and spaced from said container sidewall to present an open bottom channel between said lip and said container sidewall;

a discoidal lid sized for covering an open top of the container and having a peripheral edge;

a lid sidewall extending above said lid at said peripheral edge and having an outer surface with a circumferentially extending rib formed thereon, said rib sized for complemental engagement with the groove formed in the container sidewall;

a detachable strip at an upper edge of said lid sidewall and generally overlying the upper rim of the container sidewall, said detachable strip including at least one locking member spaced from the lid sidewall and including a downwardly extending skirt and a wall connected with the skirt and cooperating therewith to present an upwardly open channel into which said lip extends, said wall of the locking member extending upwardly into said open bottom channel;

whereby said open bottom channel and said upwardly open channel interlock to prevent release of the closure from the container when coupled therewith without at least partial detachment of said strip from the lid.

16. The closure of claim 15, wherein said strip is detachable from said lid sidewall along a weakened detachment line.

17. The closure of claim 15, wherein said detachment line includes a plurality of circumferentially spaced cuts separated at their adjacent ends by frangible webs.

18. The closure of claim 17, including a plurality of circumferentially spaced locking members.

19. The closure of claim 16, including a tab on said strip to provide a finger grip on said strip for removal thereof.

20. The closure of claim 16, including an outwardly projecting flange at the upper edge of said lid sidewall coupled with said skirt, wherein said flange includes said weakened detachment line and wherein said detachable strip comprises said skirt and the portion of said flange located on one side of said detachment line.

21. The closure of claim 20, including a plurality of circumferentially spaced cuts in said flange, each cut separated from an adjacent cut by a frangible web with said detachment line extending through said frangible web.

22. The closure of claim 21, wherein said skirt includes a plurality of circumferentially spaced locking members and a tab portion positioned between two adjacently positioned locking members to provide a finger grip for removal of the detachable strip.