US3519189A - Protective container - Google Patents
Protective container Download PDFInfo
- Publication number
- US3519189A US3519189A US743673A US3519189DA US3519189A US 3519189 A US3519189 A US 3519189A US 743673 A US743673 A US 743673A US 3519189D A US3519189D A US 3519189DA US 3519189 A US3519189 A US 3519189A
- Authority
- US
- United States
- Prior art keywords
- carton
- egg
- hinges
- indentations
- edge
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS 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
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
- B65D85/32—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for eggs
- B65D85/324—Containers with compartments made of pressed material
Definitions
- an egg carton made of a material such as foamed polystyrene in which at least one longitudinal edge, where the top and bottom of the carton come together, has spaced identations and a heat sealed joining of the top and bottom portions at these identations.
- the second longitudinal edge where the top and bottom portions come together has relatively short spaced hinges so that when the carton is open, the top portion can either be refolded back or can be torn off, at option of the user.
- each of these hinges has a length sufliciently small so that they can readily be melted through and a heat seal effected.
- a heat seal is effected at various spots along both longitudinal edges of the carton, the top of the carton can easily be torn off by the user.
- This invention relates in general to a protective container and more particularly to an improved means for sealing together the top and bottom portions of an egg carton.
- Foamed polystyrene egg cartons have become a major component of the egg carton industry.
- Each carton is separately stamped from a sheet of foamed polystyrene and the stamping process is one wherein the bottom and top portions of the egg carton are stamped as a single unit with a longitudinal hinge permitting the top portion to be swung over on top of the bottom portion after the bottom portion has been filled with eggs.
- the bottom portion has a seven-eighths to one inch flap, into which flap latching means such as protrusions are formed during the thermo-forming process. Where the latching means are protrusions, they mate with openings in the side wall of the top portion so that the egg carton will be held closed.
- this invention provides a means for closing the egg carton which will be a permanent closure, until the egg carton is opened by the ultimate consumer, and yet will not involve additional relatively expensive steps or material.
- One of the major elements in the cost of the egg carton is the cost of the sheets of foam polystyrene which are thermoformed into the ultimate egg carton by means of matching male and female dies.
- the cost of the egg carton and of the foamed polystyrene material is by no means ice negligible when compared with the cost of the dozen eggs which go into each carton. Accordingly, any savings in the amount of polystyrene material necessary will have a meaningful impact on the total cost of the end product.
- *It is a more specific and related purpose of this invention to eliminate the need for the seven-eighths to one inch wide flap which is used to join the top and bottom portions of the carton. But, it is an important purpose of this invention to eliminate the need for this flap without requiring additional foamed polystyrene or other additional material which would simply replace the cost of the material saved.
- one embodiment of this invention involves a foamed polystyrene egg carton formed by the usual techniques of thermo-forming in which the top portion is formed hinged to the bottom portion.
- the hinges formed are relatively short in length, being approximately one-fourth inch in length, and are a plurality in number, spaced from one another along one of the longitudinal edges joining the top and bottom portions. Longitudinally, these hinges are preferably positioned between the pockets containing eggs so that a heat carrying member can be brought into contact with the hinges to cause the hinges to melt and form a heat seal at each of these points.
- the other longitudinal edge, wherein the top and bottom portions of the egg carton are joined has a plurality of spaced heat seals. Each of these heat seals are preferably located between adjacent egg pockets where top and bottom portions of the container are recessed inwardly thereby facilitating placing a heat carrying member at the edges so as to seal the edges at the points desired.
- FIG. 1 is a perspective view of the carton of this invention in which the top and bottom portions are open and the interior of the egg carton is shown and the individual hinges that permit the top portion to be refolded on the bottom portion are shown along the edge joining the top and bottom portions;
- FIG. 2 is a perspective view of the FIG. 1 carton, in which top and bottom portions are closed, showing the heat seal on one edge and hinge on the other;
- FIG. 3 is a perspective view of the FIG. 1 carton with the top and bottom portions closed and sealed together, showing heat seals on both edges;
- FIG. 4 is a cross sectional view along the plane 4-4 in FIG. 2 showing a seal on one edge and a hinge on the other in cross section;
- FIG. 5 is a perspective view of an embodiment wherein a separate fastener is used to effect closure
- FIG. 6 is a cross section along the plane 6-6 of FIG. 5;
- FIG. 7 is a perspective veiw of one of the fasteners that may be used in the FIG. 5 embodiment.
- FIG. 8 is a perspective view of an embodiment wherein spot heat seals are used to effect closure.
- FIGS. 1 through 4 views of the same egg carton 10, illustrating the egg carton in both opened (FIG. 1) and closed, sealed (FIGS. 2 and 3) state.
- the carton has a top portion 12 and a bottom portion 14.
- the bottom portion 14 has a series of shaped egg holding cells 16 of known design for holding each egg (no eggs are shown) individually so that the eggs do not rattle against one another.
- Various means may be provided, if desired, in the top cover to fit, secure or relegate each egg.
- each hinge 20 joining the top portion 12 and bottom portion 14 of the egg carton 10.
- the length of each hinge 20 is preferably small, in the order of magnitude of one-quarter of an inch.
- the relatively small in length hinge 20 makes it much easier for the ultimate consumer to readily tear off the top portion 12 when opening the egg carton.
- the bottom portion may be used to store the eggs and permit easy access.
- the fact that the hinges 20 are provided gives the ultimate consumer the option of tearing off the top portion 12 or continuing to retain the top portion and employing the hinges 20 to refold the top portion back on top of the bottom portion 14.
- a second reason for having the hinges 20 relatively short in length is to make it a relatively simple step to place a heating implement on the hinges, after packing eggs in the carton and after folding the top portion 12 over the bottom portion 14, so as to effect a heat seal at each hinge position.
- the hinges are destroyed because they are melted away and replaced by a heat seal along the edge between the top and bottom portions of the egg carton.
- the manufacturer thereby replaces the hinge 20 with the heat seal, the ultimate consumer has to destroy the seal in order to gain access to the eggs.
- FIG. 3 best shows the plurality of edge seals 22 which, when foamed polystyrene is employed, are formed by the simple application of local heat. These edge seals 22 are formed alOng at least one of the longitudinal lines joining the top portion 12 and bottom portion 14 of the carton.
- the second edge may have the hinges shown in FIGS. 1 and 2 or, alternatively, may have a second row of edge seals 22 as shown in FIG. 3.
- the top portion 12 is formed with indentations 24 along its outer surface adjacent to the area where the edge seals 22 are formed.
- These indentations 24 permit a heat carrying tool to be brought into contact with the edges of the rim 26 of the carton to form the heat seal while avoiding contact with the rest of the surface of the top portion.
- Such contact with the top portion 12 is undesirable since it would melt and distort the shape of the top portion and produce both unsightly and unpredictable results.
- the edge seals 22 are preferably located between the cells 16 in the bottom portion 14. When so located, the natural indentations between cells 16 afford protection from the heat carrying tool which effects the edge seals 22.
- the top portion 12 is folded over the bottom portion 14 in the normal fashion. Heat carrying rods are brought into contact with the rim 26 along the edges of the carton where it is desired to form the edge seals 22. At the same time, the flanged out rim portions 26 of the top 12 and of the bottom 14 are held in contact against one another when the heat carrying member is applied. This assures that the portion of the rims 26 which are to form the edge seals 22 will fuse with one another and not be separated by a gap.
- edge seals 22 and hinges 20 provides an egg carton (see FIG. 2) which is permanently sealed until the ultimate consumer opens it and which affords the ultimate consumer the option of either retaining or discarding the top portion 12.
- the egg carton illustrated in FIG. 1, with one row of hinges provides a universal intermediate product which can be used by the egg processor to provide either one of two types of egg cartons for the ultimate consumer.
- the first type of egg carton is, as just described, one with the hinges 20 along one longitudinal edge and the edge seals 22 along the other longitudinal edge.
- the second type of egg carton is one with edge seals 22 along both longitudinal edges, the hinges having been melted and replaced by edge seals.
- this edge seal technique completely eliminates the need for a closing flap and thus saves on material.
- this invention simplifies the manufacture of the egg carton. For example, in one of the presently used types of cartons, holes must be punched in the top portion to mate with the knobs in the flap hinges to the bottom portion. This invention eliminates the need to punch such holes.
- FIGS. 5 through 7 illustrate a further embodiment wherein the basic FIG. 1 embodiment is sealed by means of separate fasteners 30.
- These fasteners 30, which may be made of either metal or plastic, provide the option for a user of a readily reclosable carton 10.
- the hniges 20 are left in place, without being heat sealed away, so that the top 12 can be readily opened and closed when the fasteners 30 are removed.
- the fasteners 30 extend through the rim 26 at the positions where the indentations 24 are located. Because the design of this carton 10 includes the indentations 24, enough space is provided along the rim 26, at the indentations 24, so that fasteners, such as the fasteners 30, may be employed.
- FIG. 5 embodiment meets a major objective of this invention, which is to save on the cost of material required for the carton 10 involved.
- FIG. 8 illustrates a further embodiment wherein spot heat seals 32 are used to effect closure. Because this carton design includes the indentations 24, there is space at the indentations to spot heat seal without melting or distorting other portions of the carton. Thus the FIG. 8 embodiment, like the FIG. 5 embodiment, meets a major objective of this invention, which is to eliminate the need for additional material to form flaps to provide a closure.
- the invention has been described in an egg container embodiment. Yet the container design could be made for light bulbs, Christmas tree ornaments, fruits or the like.
- a carton having a top portion and a bottom portion, said bottom portion having a plurality of cells for retaining articles therein and indentations in a pair of opposite outer walls corresponding to the spaces between adjacent cells, and said top portion having corresponding indentations in at least one of a like pair of opposite outer walls, whereby with said carton in closed position, the indentations on said top and bottom portions are in registry; the improvement comprising,
- each of said hinge means being positioned adjacent the indentations in said first pair of outer walls
- top and bottom portions and said hinge means are integrally formed of a foamed plastic material.
- each of said top and bottom portions include flange portions forming the bases of the indentations in the outer walls thereof with the corresponding flange portions of each pair of aligned indentations coming into contact upon closure of the carton to provide said fastening receiving means.
- each of said hinge means is of relatively short length to permit ready separation of said top and bottom portions.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packaging Frangible Articles (AREA)
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US74367368A | 1968-07-10 | 1968-07-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3519189A true US3519189A (en) | 1970-07-07 |
Family
ID=24989705
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US743673A Expired - Lifetime US3519189A (en) | 1968-07-10 | 1968-07-10 | Protective container |
Country Status (1)
Country | Link |
---|---|
US (1) | US3519189A (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3672693A (en) * | 1969-07-11 | 1972-06-27 | Dennis Douglas Weir | Egg carton |
US3721360A (en) * | 1970-03-02 | 1973-03-20 | Phillips Petroleum Co | Readily openable foamed polymer container |
US3868054A (en) * | 1972-07-20 | 1975-02-25 | Dolco Packaging Corp | Container |
US3874579A (en) * | 1973-03-19 | 1975-04-01 | Mobil Oil Corp | Packaging support tray |
US3908891A (en) * | 1972-03-21 | 1975-09-30 | Mobil Oil Corp | Divisible thermoplastic egg carton |
US3937389A (en) * | 1971-12-27 | 1976-02-10 | Harold Wind | Disposable food container |
US3950208A (en) * | 1973-08-17 | 1976-04-13 | Borden, Inc. | Method of making egg cartons |
FR2318791A1 (en) * | 1975-07-23 | 1977-02-18 | Kutschka Spielwarenfab Karlman | Sealed plastic packing container - has flanges on free edges of hinged halves joined by press studs |
US4015766A (en) * | 1975-01-27 | 1977-04-05 | Aktieselskabet Brodrene Hartmann | Package of fiber material or other resilient material for receiving fragile articles, particularly eggs |
USRE29248E (en) * | 1973-03-21 | 1977-06-07 | Dolco Packaging Corporation | Container |
US4081122A (en) * | 1976-08-12 | 1978-03-28 | Hobson John S | Combined ice tray egg carton |
US4121751A (en) * | 1973-08-31 | 1978-10-24 | Aktieselskabet Brodrene Hartmann | Packing carton for breakable articles |
US4462537A (en) * | 1980-10-21 | 1984-07-31 | Hendrikus Grootherder | Egg container |
US5655944A (en) * | 1996-03-01 | 1997-08-12 | Fusselman; Robert M. | Packaging apparatus and aerial device formed from sheet material |
US20040063557A1 (en) * | 2002-03-07 | 2004-04-01 | Timothy Bohrer | Method of making one-piece lidded container and containers made by the same |
US20050145529A1 (en) * | 2003-12-31 | 2005-07-07 | Andrews Alan P. | Egg carton |
GB2446795A (en) * | 2007-02-23 | 2008-08-27 | Pregis Rigid Packaging Ltd | Container with hinge of reduced resilience |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2162162A (en) * | 1938-03-05 | 1939-06-13 | Amalia De Murguiondo Riggo | Quick freezing ice tray |
US3326443A (en) * | 1965-07-19 | 1967-06-20 | Dow Chemical Co | Egg carton |
US3333760A (en) * | 1966-07-11 | 1967-08-01 | Phillips Petroleum Co | Carrier |
US3424363A (en) * | 1965-10-22 | 1969-01-28 | Monsanto Co | Packages |
-
1968
- 1968-07-10 US US743673A patent/US3519189A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2162162A (en) * | 1938-03-05 | 1939-06-13 | Amalia De Murguiondo Riggo | Quick freezing ice tray |
US3326443A (en) * | 1965-07-19 | 1967-06-20 | Dow Chemical Co | Egg carton |
US3424363A (en) * | 1965-10-22 | 1969-01-28 | Monsanto Co | Packages |
US3333760A (en) * | 1966-07-11 | 1967-08-01 | Phillips Petroleum Co | Carrier |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3672693A (en) * | 1969-07-11 | 1972-06-27 | Dennis Douglas Weir | Egg carton |
US3721360A (en) * | 1970-03-02 | 1973-03-20 | Phillips Petroleum Co | Readily openable foamed polymer container |
US3937389A (en) * | 1971-12-27 | 1976-02-10 | Harold Wind | Disposable food container |
US3908891A (en) * | 1972-03-21 | 1975-09-30 | Mobil Oil Corp | Divisible thermoplastic egg carton |
US3868054A (en) * | 1972-07-20 | 1975-02-25 | Dolco Packaging Corp | Container |
US3874579A (en) * | 1973-03-19 | 1975-04-01 | Mobil Oil Corp | Packaging support tray |
USRE29248E (en) * | 1973-03-21 | 1977-06-07 | Dolco Packaging Corporation | Container |
US3950208A (en) * | 1973-08-17 | 1976-04-13 | Borden, Inc. | Method of making egg cartons |
US4121751A (en) * | 1973-08-31 | 1978-10-24 | Aktieselskabet Brodrene Hartmann | Packing carton for breakable articles |
US4015766A (en) * | 1975-01-27 | 1977-04-05 | Aktieselskabet Brodrene Hartmann | Package of fiber material or other resilient material for receiving fragile articles, particularly eggs |
FR2318791A1 (en) * | 1975-07-23 | 1977-02-18 | Kutschka Spielwarenfab Karlman | Sealed plastic packing container - has flanges on free edges of hinged halves joined by press studs |
US4081122A (en) * | 1976-08-12 | 1978-03-28 | Hobson John S | Combined ice tray egg carton |
US4462537A (en) * | 1980-10-21 | 1984-07-31 | Hendrikus Grootherder | Egg container |
US5655944A (en) * | 1996-03-01 | 1997-08-12 | Fusselman; Robert M. | Packaging apparatus and aerial device formed from sheet material |
US20040063557A1 (en) * | 2002-03-07 | 2004-04-01 | Timothy Bohrer | Method of making one-piece lidded container and containers made by the same |
US6805659B2 (en) * | 2002-03-07 | 2004-10-19 | Ivex Packaging Corporation | Method of making one-piece lidded container and containers made by the same |
US20050145529A1 (en) * | 2003-12-31 | 2005-07-07 | Andrews Alan P. | Egg carton |
US7255231B2 (en) | 2003-12-31 | 2007-08-14 | Pactiv Corporation | Egg carton |
GB2446795A (en) * | 2007-02-23 | 2008-08-27 | Pregis Rigid Packaging Ltd | Container with hinge of reduced resilience |
GB2446795B (en) * | 2007-02-23 | 2011-11-30 | Pregis Rigid Packaging Ltd | Container and Method |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PI, INC., PACKAGING INDUSTIES GROUP, INC., PI CORP Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:PHILADELPHIA NATIONAL BANK;REEL/FRAME:004449/0188 Effective date: 19850322 |
|
AS | Assignment |
Owner name: PACKAGING INDUSTRIES GROUP, INC., A DE. CORP., MAS Free format text: LICENSE;ASSIGNOR:MARINE MIDLAND BUSINESS LOANS, INC.;REEL/FRAME:004661/0978 Effective date: 19860929 Owner name: MARINE MIDLAND BUSINESS LOANS, INC., A CORP., MASS Free format text: SECURITY INTEREST;ASSIGNOR:PACKAGING INDUSTRIES GROUP, INC.;REEL/FRAME:004661/0972 Effective date: 19860929 Owner name: PACKAGING INDUSTRIES GROUP, INC., 130 NORTH STREET Free format text: LICENSE;ASSIGNOR:MARINE MIDLAND BUSINESS LOANS, INC.;REEL/FRAME:004661/0978 Effective date: 19860929 Owner name: MARINE MIDLAND BUSINESS LOANS, INC., 60 HICKORY DR Free format text: SECURITY INTEREST;ASSIGNOR:PACKAGING INDUSTRIES GROUP, INC.;REEL/FRAME:004661/0972 Effective date: 19860929 |
|
AS | Assignment |
Owner name: PACKAGING INDUSTRIES GROUP, INC. A CORP. OF DEL Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:MARINE MIDLAND BUSINESS LOANS, INC.;REEL/FRAME:005758/0215 Effective date: 19910429 |