US3601306A - Locking mechanism for egg cartons - Google Patents

Locking mechanism for egg cartons

Info

Publication number
US3601306A
US3601306A US3601306DA US3601306A US 3601306 A US3601306 A US 3601306A US 3601306D A US3601306D A US 3601306DA US 3601306 A US3601306 A US 3601306A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
locking
carton
cover
front wall
flap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Inventor
Theodore P Martens
James R Patton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atlantic Richfield Co
Sinclair Koppers Co
Original Assignee
Sinclair Koppers Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/30Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
    • B65D85/32Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for eggs
    • B65D85/324Containers with compartments made of pressed material

Abstract

A locking mechanism for an egg carton having an integrally hinged tray and cover. The locking mechanism includes a locking flap hingedly connected to the cover and foldable into overlapped relation with the inside of the cover''s front wall and locking detents projecting inwardly from the inner surface of the folded flap. The carton is secured shut by interlockingly engaging the locking detents with the underside of a raided lip on the front wall of the carton''s tray.

Claims (7)

1. A packaging carton comprising a bottom section having a front wall and a rear wall; a cover section having a front wall and a rear wall, the cover and bottom sections'' rear walls being hingedly connected so that the cover section can assume a closed superimposed position with respect to the bottom section; and interlocking means on the front walls of the cover and bottom sections for releasably holding the carton closed, said interlocking means comprising: a. a locking flap hingedly connected to the bottom longitudinal edge of the cover section''s front wall and foldable into overlapped relation with the inside of the cover''s front wall; b. a plurality of spaced lockin detents projecting inwardly from the inside surface of the flap when it is in substantially folded overlapped position, said locking detents having an upper flat locking edge and depending sidewalls slanting toward the bottom of the locking flap; c. a plurality of spaced lugs projecting upwardly from the top of the front wall of the bottom section, each lug having a recess open at the front for receipt of a locking detent; and d. flat top walls on each of said lugs defining the top of said recess and forming a plurality of spaced locking lips corresponding to the plurality of locking detents; said locking lips engaging the upper flat locking edges of the locking detents as the sections are moved into closed position thereby pivoting the locking flap up into overlapped relation with the inside of the cover section''s front wall and bringing the locking edges of the detents into locking engagement with the underside of the locking lips.
2. The carton of claim 1, in the form of an egg carton with the bottom section having a plurality of egg-accommodating cells.
3. The carton of claim 1, wherein the carton is of unitary molded construction.
4. The carton of claim 3, wherein the molded carton is formed of foamed polystyrene.
5. The carton of claim 1, including a locking flange, coextensive with the locking flap and extending beyond the locking edges of the locking detents, said locking flange abutting the forward edge of the locking lips when the sections are in closed position to hold the locking flap in locked position.
6. The carton of claim 5, wherein the hinged connection between the locking flap and the cover section''s front wall resiliently urges the flap away from the inside of the cover''s front wall so that the locking detents snap into their corresponding recesses in the lugs when the sections are moved into closed position.
7. The carton of claim 5, in which the hinged connection between the cover and bottom sections'' rear wall resiliently urges the sections apart so that the locking detent''s upper locking edges snap into tight engagement with the underside of the lugs'' locking lips when the sections are moved into closed position.
US3601306A 1969-07-15 1969-07-15 Locking mechanism for egg cartons Expired - Lifetime US3601306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US84172169 true 1969-07-15 1969-07-15

Publications (1)

Publication Number Publication Date
US3601306A true US3601306A (en) 1971-08-24

Family

ID=25285550

Family Applications (1)

Application Number Title Priority Date Filing Date
US3601306A Expired - Lifetime US3601306A (en) 1969-07-15 1969-07-15 Locking mechanism for egg cartons

Country Status (1)

Country Link
US (1) US3601306A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090092507A1 (en) * 2005-08-05 2009-04-09 Ramirez Jr Emilio A Fluid pump systems
US8469682B2 (en) 2005-08-05 2013-06-25 Molon Motor And Coil Corporation Peristaltic pump with torque relief
US8585379B2 (en) 2005-08-05 2013-11-19 Molon Motor And Coil Corporation Peristaltic pump that is resistant to torques and vibrations

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337110A (en) * 1966-04-08 1967-08-22 Mobil Oil Corp Egg carton construction

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337110A (en) * 1966-04-08 1967-08-22 Mobil Oil Corp Egg carton construction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090092507A1 (en) * 2005-08-05 2009-04-09 Ramirez Jr Emilio A Fluid pump systems
US8469682B2 (en) 2005-08-05 2013-06-25 Molon Motor And Coil Corporation Peristaltic pump with torque relief
US8585379B2 (en) 2005-08-05 2013-11-19 Molon Motor And Coil Corporation Peristaltic pump that is resistant to torques and vibrations

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ATLANTIC RICHFIELD COMPANY, 515 FLOWER ST., LOS AN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE JULY 1, 1981.;ASSIGNOR:ARCO POLYMERS, INC., A CORP. OF PA;REEL/FRAME:003944/0516

Effective date: 19810630