US3863832A - Food container - Google Patents
Food container Download PDFInfo
- Publication number
- US3863832A US3863832A US316664A US31666472A US3863832A US 3863832 A US3863832 A US 3863832A US 316664 A US316664 A US 316664A US 31666472 A US31666472 A US 31666472A US 3863832 A US3863832 A US 3863832A
- Authority
- US
- United States
- Prior art keywords
- container
- lid
- tray
- thermoplastic
- upstanding walls
- 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
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- 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
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/10—Container closures formed after filling
- B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
- B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
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- 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
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
- B65D5/2038—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form at least two opposed folded-up portions having a non-rectangular shape
- B65D5/2047—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form at least two opposed folded-up portions having a non-rectangular shape trapezoidal, e.g. to form a body with diverging side walls
-
- 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
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
- B65D5/28—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with extensions of sides permanently secured to adjacent sides, with sides permanently secured together by adhesive strips, or with sides held in place solely by rigidity of material
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- 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
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/42—Details of containers or of foldable or erectable container blanks
- B65D5/44—Integral, inserted or attached portions forming internal or external fittings
- B65D5/48—Partitions
- B65D5/48002—Partitions integral
- B65D5/48022—Partitions integral formed by two parallel panels located in the base of a tray being folded up towards each other
-
- 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
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/42—Details of containers or of foldable or erectable container blanks
- B65D5/56—Linings or internal coatings, e.g. pre-formed trays provided with a blow- or thermoformed layer
-
- 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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
- B65D81/343—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated in a conventional oven, e.g. a gas or electric resistance oven
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- 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
- B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
- B65D2577/10—Container closures formed after filling
- B65D2577/20—Container closures formed after filling by applying separate lids or covers
- B65D2577/2025—Multi-layered container, e.g. laminated, coated
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S229/00—Envelopes, wrappers, and paperboard boxes
- Y10S229/902—Box for prepared or processed food
- Y10S229/903—Ovenable, i.e. disclosed to be placed in an oven
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S229/00—Envelopes, wrappers, and paperboard boxes
- Y10S229/902—Box for prepared or processed food
- Y10S229/905—Frozen food
Definitions
- ABSTRACT Disclosed is a container for packaging foods and, particularly, refrigerated and frozen foods.
- the container includes a tray and a lid both of which are polyolefin coated paperboard.
- an object of our invention is to satisfy the demand for a low cost, disposable container for packaging foods wherein the container is so constructed that it will protect the food packaged therein during refrigeration and, additionally, may be used during the heating and serving of the packaged food.
- the demand for such a container originates from a number of environments wherein large quantities of discreet portions of food must be refrigerated for a substantial length of time and, subsequently, prepared and served within a minimum length of time.
- Two readily apparent environments which demand such a food package are airlines and educational institutions. In either of these environments, discreet, premeasured portions of food must be stored under refrigerated conditions for extended periods of time, quickly reheated and served.
- a food container used in either of these environments must be low in cost, disposable and adapted to protect the food packaged therein under conditions of temperature extremes.
- a container in order to be low in cost, such a container must be of a construction which readily permits the use of high speed forming machines for erecting the container.
- the invention disclosed herein relates particularly to a food packaging container which satisfies the diverse requirements heretofore discussed.
- Prior Art reflects an attempt to provide a food packaging container which would satisfy all of the diverse criteria established by users of such containers. However, to our knowledge, the prior art does not disclose a food packaging container which incorporates, in combination, the individual construction elements which characterize our invention.
- U.S. Pat. No. 3,550,835 discloses a food package constructed from polypropylene coated cardboard.
- the construction disclosed in that patent employs a complex corner joint construction wherein a multiplicity of angularly disposed score lines are used to define the corner joint and each corner joint is provided with multi-sided extension tabs.
- an acceptable container can be fabricated from such a blank, the complexity of the blank requires that sophisticated machinery be employed to form a container from the blank and/or the operating speed of such machinery must be limited.
- Other equally complex corner joint constructions are disclosed in U.S. Pat. Nos. 3,536,248 and 3,565,324.
- thermoplastic coated paperboard With respect to food containers which are exclusively made of plastic, the material and manufacturing cost thereof is not as attractive as the material and manufacturing cost associated with the use of the material which we employ, i.e. thermoplastic coated paperboard.
- Another problem indigenous to many prior art constructions relates to the difficulty of removing the lid from the tray after the food is heated. Typically, this problem is most severe in the case of all plastic containers or thermoplastic coated paperboard containers wherein the lid is heat sealed to the tray. With such constructions, the heat seal between the tray and the lid is so strong as to necessitate the use of a cutting device, e.g. a knife, to open the container or the lid must be pre-weakened, e.g., by perforations, to enable one to remove the lid.
- a cutting device e.g. a knife
- 2,633,284 discloses a food container construction wherein meltable plugs are provided.
- the meltable plugs provide a venting means whereby internal pressures may be relieved. It will be appreciated that although the mechanism of providing such meltable plugs essentially solves the problem of relieving internally generated pressures, manufacturing expense is occurred in that the container must be specifically constructed to receive such plugs, the meltable plugs must be accurately positioned on or within the container and the sealing of the container must insure that the meltable plugs are tightly gripped.
- the prior art discloses a number of containers which satisfy one or a few of the criteria established by users of food packaging containers. However, the prior art does not disclose a container which satisfies all of the criteria previously discussed.
- the food packaging container of the invention disclosed herein includes a tray and a lid both of which are constructed of paperboard having a thermoplastic coating on at least the interior surface thereof.
- Preferable thermoplastics are polyethylene and polypropylene.
- the tray includes a base portion and a plurality of upstanding walls.
- the base portion is rectangular with four divergingly upstanding walls which are foldably connected to the base portion.
- the upstanding walls are transversely interconnected by corner closures.
- Each corner closure is foldably connected to an upstanding wall at one end thereof and is overlappingly bonded to the transverse end of the adjacent upstanding wall.
- the fold line and separation line which initially define the corner closures are arranged such that when a tray is formed, a land is provided at the lower corner of each tray.
- Each of the upstanding walls is foldably connected to a horizontal panel.
- the ends of the horizontal panels are abutting so as to form a horizontal, peripheral flange.
- the lid is bonded to the peripheral flange.
- the bond between the flange and the lid is heat sensitive, i.e. the bond material and the aggregate bonding area are selected and adjusted such that the bond between the lid and the flange will fail at a pre-selected temperature and/or because of an increased pressure within the container.
- both the tray and the lid are coated on both sides with polyethylene.
- a preferable coating thickness of polyethylene is approximately 1 mil and a preferable basis weight for the paperboard is in the range of I24 288 pounds per thousand square feet.
- the bond connecting the lid and the flange may be provided by either a pressure sensitive adhesive, a hot melt adhesive or more generally, a dry, heat-activated adhesive.
- An alternate construction which embodies our invention provides a compartment tray.
- FIG. 1 is a view, in perspective, of a tray and a lid which, in combination, embodies our invention.
- FIG. 2 is a plan view ofa blank which may be erected to form a tray of the type shown in FIG. 1.
- FIG. 3 is a lid which is used in combination with a tray of the type shown in FIG. 1.
- FIG. 4 is a view, in perspective, of another embodiment of our invention.
- FIG. 5 is a plan view of a blank which may be erected to form the construction shown in FIG. 4.
- FIG. 1 A preferred embodiment of our invention is shown in FIG. 1 and includes a tray 9 having a rectangular base portion 10.
- Upstanding walls l2, l4, l6 and 18 are foldably connected to the base portion 10 at fold lines 22, 24, 26 and 28 respectively, the aforementioned fold lines being more clearly seen in FIG. 2.
- the upstanding walls are divergently disposed, as shown in FIG. 1, rather than vertically disposed. Divergently disposed walls are preferable because the trays may then be nested prior to being filled and sealed. A desirable angle of divergence is approximately l7 away from the vertical.
- panels 32, 34, 36 and 38 are foldably connected to upstanding walls l2, l4, l6 and 18 by fold lines 42, 44, 46 and 48, respectively.
- the panels 32, 34, 36 and 38 are horizontally disposed.
- the ends of the aforementioned panels are transversely cut such that, when the blank is erected to form a tray as shown in FIG. I, the ends of said panels are transversely abutting.
- corner closures l3, l5, l7 and 19 are provided between the ends of adjacent wall panels. Moreover, it will be noted that each of the corner closures l3, l5, l7 and 19 is foldably connected, along a transverse fold line, to one of the wall panels and is separated from the adjacent wall panel by a cut or severed line.
- corner closure 13 is foldably connected to wall panel 12 by fold line 51 and is separated from wall panel 14 by the cut 52.
- fold lines 54, 55 and 58 foldably connect closures 15, 17 and 19 to wall panels I6 and 12, respectively. Cut lines 53, 56 and 57 are analogous to cut line 52.
- fold lines and to the severed lines which define each of the corner closures it may be observed that in all cases the fold lines originate at an intersection of two other fold lines whereas the associated cut or severed line originates at a point slightly distant from the intersection of the aforementioned fold lines.
- fold line 51 originates at the intersection of fold lines 22, 24 and extends outwardly to fold line 42.
- severed line 52 originates at a point slightly distant from the intersection of the fold lines 22 and 24.
- the corner closures and the upstanding walls adjacent thereto define a land at the bottom of each corner of the tray and thus an opening or discontinuity is avoided at the bottom of each corner of the tray.
- thermoplastic coating Preferably, both the surfaces of both the lid and the blank are coated with a thermoplastic.
- polyethylene is generally a preferable coating and, when polyethylene is employed, the preferable coating thickness is approxi mately one mil.
- thermoplastic coating at least the interior of both the blank of FIG. 2 and the lid of FIG. 3, a number of benefits are provided.
- the resulting container is substantially water proof.
- an even more important benefit resides in the fact that the surfaces of the resulting container construction are relevantly gas impermeable. While the full significance of providing such a construction will be pointed out hereinafter, suffice it to say, at this point, that by providing impermeable surfaces, a functionally superior food packaging container may be obtained.
- the basis weight of the paperboard is in the range of approximately I24 to 288 pounds.
- end closures l5 and 17 are foldably connected to the wall panel 16 while end closures l3 and 19 are foldably connected to the wall panel 12.
- the walls 14 and 18 may be folded into an upstanding position without a restraint being imposed thereon through a connection to the wall panels 12 and 16 or any of the corner closures l3, l5, l7 and 19.
- the opposed walls 12 and 16 may be folded and, thereafter, the end closures 13, 15, 17 and 19 positioned exteriorly of the walls 14 and 18.
- each of the corner closures is attached to only one of the adjacent walls, there is no criticality associated with the sequence in which the walls are folded, e.g. they may be folded simultaneously.
- the corner closures are positioned exteriorly of the upstanding walls. More particularly, the end closures are overlappingly bonded to the upstanding walls which is adjacent to the upstanding wall to which each end closure is foldably attached.
- a preferred construction results from coating both the interior and the exterior of the tray with a thermoplastic, e.g. polyethylene.
- the corner closures may be overlappingly bonded to the upstanding walls by heat sealing the corner closures to the walls, i.e. by using the exterior and interior thermoplastic coating to achieve a bond.
- an adhesive may be used to bond the corner closure to the walls.
- a continuous band of adhesive 31 is applied to the interior of the lid 29.
- the function of the continuous band of adhesive 31 is to bond the lid 29 to the peripheral flange on the tray formed by the panels 32, 34, 36 and 38.
- the adhesive may be applied to either the aforementioned peripheral flange or to the interior of the lid as shown in F IG. 3, certain other aspects regarding the adhesive may not be varied. Thus, the bonding area and the particularly adhesive employed must conform to the criteria now to be set forth.
- an important object of our invention is to provide a food packaging container which will protect the food packaged therein during periods of exposure of low temperature (freezer conditions) while nevertheless providing a container which can be used to heat the food.
- these two objectives are, in fact, conflicting.
- the packaging container completely encompass and seal the food packaged therein. Otherwise, the food may be subject to so called freezer burn. Additionally, if such a package does not provide an effective seal, the food packaged therein may be dried.
- a heat sensitive adhesive connection between the lid and the flange of the container.
- the phrase heat sensitive adhesive connection is defined to mean an adhesive connection between the lid and the tray which will fail because of increased internal pressures occurring at a preselected elevated temperature.
- the pre-selected temperature employed is the maximum temperature above which internally generated pressures caused by reheating the food would cause deformation of the container.
- the temperature selected will be a temperature in the range of to 350F.
- the heat sensitive adhesive connection of our invention will fail, venting of the internal pressure will occur and subsequent removal of the lid is facilitated.
- an adhesive in order to achieve such automatic venting an adhesive must be selected which has a bonding strength within a particular range and, depending upon the bonding strength of the particular adhesive selected, the adhesive pattern must be adjusted.
- the adhesive and the adhesive pattern are selected such that at the pre-selected temperature, the aggregate strength of the overall heat sensitive adhesive connection will be equal to the outwardly directed force exerted on the lid and the tray due to increased internal pressure.
- the particular adhesive pattern employed will vary with both the size of the container and the adhesive material which is selected.
- the width of the adhesive connection may be varied, it is critical that the adhesive connection is a continuous pattern.
- the adhesive pattern 31 is a continuous pattern located around the periphery of the lid 29. It is important that the adhesive pattern be continuous because, as previously indicated, a continuous adhesive pattern will insure that the food packaged within the container is adequately protected against freezer burn and, additionally, the continuous adhesive pattern will provide a sealed container and thus insure automatic venting at high temperature.
- an aesthetically desirable design limitation resides in insuring that the interior longitudinal edge of the adhesive pattern is spaced from the fold line which connects the flange to the upstanding walls.
- a fragmentary portion 60 of an adhesive pattern is indicated.
- the interior edge 61 of the fragmentary portion 60 is spaced from the fold line 48.
- adhesives which may be employed, it has been determined that at least two different types of adhesives may be used, viz. pressure sensitive adhesives or dry, heat activated adhesives, e.g. so called hot melt adhesives.
- pressure sensitive adhesives or dry, heat activated adhesives, e.g. so called hot melt adhesives.
- a particular pressure sensitive adhesive which has been found to be acceptable in an aqueous acrylic emulsion having the following characteristics.
- a heat senstitive adhesive connection may be obtained using a three-eighth inch wide continuous adhesive pattern in connection with a onehalf inch wide flange if the dimensions of the lid are within the range of 5 inches wide by 6 inches long to 7 inches wide by 10 inches long.
- a food packaging container of these dimensions and constructed in accordance with our invention will have a heat senstive adhesive connection which provides venting in the range of to 200F.
- polyvinyl acetate is typical of a class of thermoplastic materials which possess properties that permit their use both as a coating and barrier material as well as an adhesive.
- polyvinyl acetate is typical of a class of thermoplastic materials which possess properties that permit their use both as a coating and barrier material as well as an adhesive.
- the interior of the lid may be coated therewith and, subsequently, such a lid may be heat sealed to an interiorly coated polyethylene tray and a heat sensitive adhesive connection will be the result.
- FIGS. 4 and 5 An alternate embodiment of our invention is shown in FIGS. 4 and 5 wherein FIG. 5 illustrates the blank from which the container of FIG. 4 is formed.
- the utility of the tray shown in FIG. 4 resides in the fact that compartments are intrinsically provided.
- food packaged therein may be divided, e.g. vegetables may be placed in one compartment and meat in another compartment.
- the blank of FIG. 5 is essentially a combination of two blanks of the type shown in FIG. 2, except that the two blanks are integral.
- the various panels and score lines of the blank shown in FIG. 2 are correspondingly indicated in FIG. 5 with the suffix a" and b designating the left hand side and right hand side of the blank shown in FIG. 5, the two blanks being joined by the common fold line 84.
- a container for packaging, storing and heating foods which comprises:
- a paperboard tray the interior surface of which is coated with a thermoplastic, said tray including,
- each corner closure foldably connected to a respective one of said upstanding walls and overlapping bonded thereto,
- a lid disposed on said flange, the interior surface of said lid coated with a thermoplastic
- thermoplastic is polypropylene
- thermoplastic is polyethylene
- thermoplastic coating on said lid is polyvinyl acetate and said thermoplastic coating on said tray is polyethylene and said heat sensitive adhesive connection is provided by a heat seal bond of polyethylene and polyvinyl acetate.
- a container for packaging, storing and heating foods which comprises:
- a paperboard tray the interior surface of which is coated with a thermoplastic, said tray including,
- a lid disposed on said flange, the interior surface of said lid coated with a thermoplastic
- thermoplastic is polyethylene
- a container for packaging, storing and heating foods which comprises:
- a paperboard tray the interior surface of which is coated with a thermoplastic, said tray including,
- each corner closure foldably connected to an adjacent upstanding wall and overlappingly bonded to the other adjacent upstanding wall
- a lid disposed on said flange, the interior surface of said lid coated with a thermoplastic
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Cartons (AREA)
- Package Specialized In Special Use (AREA)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US316664A US3863832A (en) | 1972-12-20 | 1972-12-20 | Food container |
CA186,489A CA994305A (en) | 1972-12-20 | 1973-11-22 | Food container |
GB5878373A GB1450813A (en) | 1972-12-20 | 1973-12-19 | Food container |
JP14340173A JPS5722819B2 (xx) | 1972-12-20 | 1973-12-20 | |
LU69044A LU69044A1 (xx) | 1972-12-20 | 1973-12-20 | |
FR7345770A FR2211927A5 (xx) | 1972-12-20 | 1973-12-20 | |
DE2363517A DE2363517A1 (de) | 1972-12-20 | 1973-12-20 | Behaelter zur aufbewahrung und erwaermung von lebensmitteln |
BE139125A BE808927A (fr) | 1972-12-20 | 1973-12-20 | Emballage pour produits alimentaires |
IT70779/73A IT1050469B (it) | 1972-12-20 | 1973-12-20 | Contenitore perfezionato per alimenti |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US316664A US3863832A (en) | 1972-12-20 | 1972-12-20 | Food container |
Publications (1)
Publication Number | Publication Date |
---|---|
US3863832A true US3863832A (en) | 1975-02-04 |
Family
ID=23230086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US316664A Expired - Lifetime US3863832A (en) | 1972-12-20 | 1972-12-20 | Food container |
Country Status (9)
Country | Link |
---|---|
US (1) | US3863832A (xx) |
JP (1) | JPS5722819B2 (xx) |
BE (1) | BE808927A (xx) |
CA (1) | CA994305A (xx) |
DE (1) | DE2363517A1 (xx) |
FR (1) | FR2211927A5 (xx) |
GB (1) | GB1450813A (xx) |
IT (1) | IT1050469B (xx) |
LU (1) | LU69044A1 (xx) |
Cited By (81)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3973721A (en) * | 1973-12-19 | 1976-08-10 | Sekisui Jushi Kabushiki Kaisha | Packing case and apparatus for producing the same |
US4003514A (en) * | 1976-01-21 | 1977-01-18 | Olinkraft, Inc. | Frozen food tray |
US4111306A (en) * | 1977-05-18 | 1978-09-05 | Champion International Corporation | Self-contained baking tray carton |
US4190191A (en) * | 1978-12-13 | 1980-02-26 | Westvaco Corporation | Sliding lid for flanged tray |
US4202465A (en) * | 1978-07-21 | 1980-05-13 | Champion International Corporation | Divided food container |
US4241863A (en) * | 1979-06-05 | 1980-12-30 | Champion International Corporation | Container with multiple compartments |
US4247038A (en) * | 1979-08-15 | 1981-01-27 | Westvaco Corporation | Bake-in-tray |
US4257530A (en) * | 1978-07-27 | 1981-03-24 | Champion International Corporation | Lined tray |
US4312451A (en) * | 1979-07-20 | 1982-01-26 | Westvaco Corporation | Self standing flanged tray with integral lid |
US4365739A (en) * | 1980-10-06 | 1982-12-28 | Champion International Corporation | Take-out carton with locking cover |
US4449633A (en) * | 1978-11-27 | 1984-05-22 | Manville Service Corporation | Ovenable paperboard carton |
US4524870A (en) * | 1983-09-06 | 1985-06-25 | Champion International Corporation | Visible and easy accessible package |
US4627984A (en) * | 1983-12-23 | 1986-12-09 | Saint-Hubert Industrie Laitiere | Process for manufacturing and packaging soft cheese |
US4779758A (en) * | 1981-08-17 | 1988-10-25 | Societe Parisienne D'impression Et De Cartonrage | Cardboard container with reinforcing slits lined with synthetic material |
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CA1088816A (en) * | 1975-09-04 | 1980-11-04 | Allan A. Whillock | Heat resistant paperboard product |
FR2404567A1 (fr) * | 1977-10-03 | 1979-04-27 | Impression Cartonnage Ste Pari | Emballage en carton revetu de matiere synthetique |
IS1192B6 (is) * | 1980-05-01 | 1985-06-18 | Metal Box Limited | Umbúðir fyrir matvæli |
FR2480708A1 (fr) * | 1980-11-07 | 1981-10-23 | Impression Cartonnage Ste Pari | Contenant en carton plie revetu d'une pellicule en matiere synthetique et muni d'un cadre peripherique en une seule piece ainsi que son procede de fabrication |
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US4757940A (en) * | 1986-05-07 | 1988-07-19 | International Paper Company | Ovenable paperboard food tray |
FR2604460B1 (fr) * | 1986-09-26 | 1991-05-10 | Soletanche | Dispositif pour engin destine a creuser des tranchees dans le sol par fraisage |
EP0299237B1 (fr) * | 1987-07-11 | 1991-02-06 | Frisco-Findus Ag | Emballage avec couvercle pour produits alimentaires |
US4955527A (en) * | 1989-02-15 | 1990-09-11 | Federal Paper Board Co., Inc. | Clamshell style carton |
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ES2425645B1 (es) * | 2012-04-10 | 2014-08-07 | Sanlucar Fruit S.L. | Tarrina de cartón para consumo de alimentos |
CN107323790B (zh) * | 2017-07-31 | 2023-09-01 | 广东美的制冷设备有限公司 | 敞口包装箱与其制造方法以及包装结构 |
EP4197927A4 (en) * | 2021-03-18 | 2024-03-20 | Savelev, Dmitrii Viktorovich | CONTAINER |
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US3973721A (en) * | 1973-12-19 | 1976-08-10 | Sekisui Jushi Kabushiki Kaisha | Packing case and apparatus for producing the same |
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US4111306A (en) * | 1977-05-18 | 1978-09-05 | Champion International Corporation | Self-contained baking tray carton |
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US4449633A (en) * | 1978-11-27 | 1984-05-22 | Manville Service Corporation | Ovenable paperboard carton |
US4190191A (en) * | 1978-12-13 | 1980-02-26 | Westvaco Corporation | Sliding lid for flanged tray |
US4241863A (en) * | 1979-06-05 | 1980-12-30 | Champion International Corporation | Container with multiple compartments |
US4312451A (en) * | 1979-07-20 | 1982-01-26 | Westvaco Corporation | Self standing flanged tray with integral lid |
US4247038A (en) * | 1979-08-15 | 1981-01-27 | Westvaco Corporation | Bake-in-tray |
US4365739A (en) * | 1980-10-06 | 1982-12-28 | Champion International Corporation | Take-out carton with locking cover |
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US5048716A (en) * | 1981-08-17 | 1991-09-17 | Societe Parisienne D'impression Et De Cartonnage | Cardboard container with reinforcing slits lined with synthetic material |
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US4627984A (en) * | 1983-12-23 | 1986-12-09 | Saint-Hubert Industrie Laitiere | Process for manufacturing and packaging soft cheese |
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US5009363A (en) * | 1990-03-15 | 1991-04-23 | Zavatone James F | Bridge separated tray and blank for forming it |
US5039001A (en) * | 1990-06-18 | 1991-08-13 | Kraft General Foods, Inc. | Microwavable package and process |
US5411204A (en) * | 1990-09-05 | 1995-05-02 | Fold-Pak Corp. | Reclosable food tray and tray blank |
US5151568A (en) * | 1990-11-21 | 1992-09-29 | Rippley Martsey D | Disposable microwave cooking utensil |
US5267686A (en) * | 1991-11-22 | 1993-12-07 | Gulf States Paper Corporation | Food package containing separate trays connected together by a single lid structure |
US5383596A (en) * | 1991-11-22 | 1995-01-24 | Gulf States Paper Corporation | Plural tray compartment carton package |
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USD385750S (en) * | 1996-10-15 | 1997-11-04 | Tropar Manufacturing Co., Inc. | Rectangular plate with leaf border |
US5868307A (en) * | 1997-08-11 | 1999-02-09 | Westvaco Corporation | Carton opening feature |
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US6351953B1 (en) * | 1999-08-26 | 2002-03-05 | James A. Scudder | Container with integral module for heating or cooling the contents and method for its manufacture |
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US20040248718A1 (en) * | 2003-06-05 | 2004-12-09 | Stanton Steven W. | Candy box construction and method |
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USD992408S1 (en) * | 2022-09-28 | 2023-07-18 | Yingxin Chen | Paper box |
Also Published As
Publication number | Publication date |
---|---|
IT1050469B (it) | 1981-03-10 |
LU69044A1 (xx) | 1975-04-11 |
JPS49101183A (xx) | 1974-09-25 |
JPS5722819B2 (xx) | 1982-05-15 |
GB1450813A (en) | 1976-09-29 |
DE2363517A1 (de) | 1974-07-04 |
CA994305A (en) | 1976-08-03 |
FR2211927A5 (xx) | 1974-07-19 |
BE808927A (fr) | 1974-06-20 |
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