US20160251117A1 - Container with Coating - Google Patents

Container with Coating Download PDF

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Publication number
US20160251117A1
US20160251117A1 US15/053,151 US201615053151A US2016251117A1 US 20160251117 A1 US20160251117 A1 US 20160251117A1 US 201615053151 A US201615053151 A US 201615053151A US 2016251117 A1 US2016251117 A1 US 2016251117A1
Authority
US
United States
Prior art keywords
container
flange
corner
coating
blank
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.)
Abandoned
Application number
US15/053,151
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English (en)
Inventor
William Gilpatrick
Jeffrey T. Sloat
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.)
Graphic Packaging International LLC
Original Assignee
Graphic Packaging International LLC
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
Application filed by Graphic Packaging International LLC filed Critical Graphic Packaging International LLC
Priority to US15/053,151 priority Critical patent/US20160251117A1/en
Publication of US20160251117A1 publication Critical patent/US20160251117A1/en
Priority to US15/696,795 priority patent/US11084626B2/en
Assigned to BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT reassignment BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FIELD CONTAINER QUERETARO (USA), L.L.C., GRAPHIC PACKAGING INTERNATIONAL, LLC (FORMERLY KNOWN AS GRAPHIC PACKAGING INTERNATIONAL, INC.)
Assigned to BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT reassignment BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT SECURITY AGREEMENT Assignors: GRAPHIC PACKAGING INTERNATIONAL, LLC
Assigned to GRAPHIC PACKAGING INTERNATIONAL, LLC reassignment GRAPHIC PACKAGING INTERNATIONAL, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GILPATRICK, WILLIAM, SLOAT, JEFFREY T.
Assigned to U.S. BANK NATIONAL ASSOCIATION reassignment U.S. BANK NATIONAL ASSOCIATION SECURITY AGREEMENT Assignors: GRAPHIC PACKAGING INTERNATIONAL, LLC
Assigned to GRAPHIC PACKAGING INTERNATIONAL, LLC, FIELD CONTAINER QUERETARO (USA), L.L.C. reassignment GRAPHIC PACKAGING INTERNATIONAL, LLC RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Assigned to BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT reassignment BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GRAPHIC PACKAGING INTERNATIONAL, LLC
Abandoned legal-status Critical Current

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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
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/14—Linings or internal coatings
    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/34—Trays or like shallow containers
    • 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
    • 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
    • B65D81/3446—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 by microwaves
    • B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups
    • 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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3437—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 specially adapted to be heated by microwaves
    • B65D2581/3463—Means for applying microwave reactive material to the package
    • B65D2581/3466—Microwave reactive material applied by vacuum, sputter or vapor deposition
    • 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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3437—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 specially adapted to be heated by microwaves
    • B65D2581/3471—Microwave reactive substances present in the packaging material
    • B65D2581/3472—Aluminium or compounds thereof
    • 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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3437—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 specially adapted to be heated by microwaves
    • B65D2581/3471—Microwave reactive substances present in the packaging material
    • B65D2581/3474—Titanium or compounds thereof
    • 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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3437—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 specially adapted to be heated by microwaves
    • B65D2581/3471—Microwave reactive substances present in the packaging material
    • B65D2581/3477—Iron or compounds thereof
    • 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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3437—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 specially adapted to be heated by microwaves
    • B65D2581/3471—Microwave reactive substances present in the packaging material
    • B65D2581/3477—Iron or compounds thereof
    • B65D2581/3478—Stainless steel
    • 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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3437—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 specially adapted to be heated by microwaves
    • B65D2581/3471—Microwave reactive substances present in the packaging material
    • B65D2581/3479—Other metallic compounds, e.g. silver, gold, copper, nickel
    • 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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3437—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 specially adapted to be heated by microwaves
    • B65D2581/3486—Dielectric characteristics of microwave reactive packaging
    • B65D2581/3489—Microwave reflector, i.e. microwave shield
    • 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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3437—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 specially adapted to be heated by microwaves
    • B65D2581/3486—Dielectric characteristics of microwave reactive packaging
    • B65D2581/3494—Microwave susceptor

Definitions

  • the present disclosure relates to blanks, containers, trays, constructs, and various features to facilitate forming a container from a blank.
  • the disclosure is generally directed to a container for holding an article.
  • the container can comprise a wall and a flange extending from the wall.
  • the wall can at least partially define a cavity of the container.
  • At least one pleat can extend in at least the flange, and a coating can be on at least a portion of the flange.
  • the coating can at least partially cover the at least one pleat and can form a substantially continuous sealing surface on the flange.
  • the disclosure is generally directed to a blank for forming a container for holding an article.
  • the blank can comprise a wall portion and a flange portion for forming a respective wall and flange of a container formed from the blank.
  • At least one score line can be for forming at least one pleat extending in at least the flange when the blank is formed into the container.
  • the at least one score line can extend in at least the flange portion.
  • a coating can be on at least a portion of the flange portion. The coating can be at least partially covering the at least one score line and can form a substantially continuous sealing surface on the flange in the container formed from the blank.
  • the disclosure is generally directed to a method of forming a container from a blank.
  • the method can comprise obtaining a blank having a wall portion, a flange portion, and a coating on at least a portion of the flange portion.
  • At least one score line can extend at least partially in the flange portion, and the coating can be at least partially covering the at least one score line.
  • the method further can comprise forming the container from the blank by forming a wall of the container from the wall portion and forming a flange of the container from the flange portion.
  • the flange can extend from the wall.
  • the forming the container further can comprise forming the at least one score line into at least one pleat in at least the flange.
  • the coating can at least partially cover the at least one pleat to form a substantially continuous sealing surface of the container on the flange.
  • FIG. 1 is a plan view of a blank used for forming a container according to a first embodiment of the disclosure.
  • FIG. 2 is a perspective view of the container formed from the blank of FIG. 1 .
  • FIG. 3 is a schematic partial elevation view of the container indicated by line 3 - 3 in FIG. 2 showing a corner of the container and a detail of the flange.
  • FIG. 4 is a perspective view of the container of FIG. 2 with a lid applied to the flange of the container according to the first embodiment of the disclosure.
  • FIG. 5 is a schematic partial elevation view of the container indicated by line 5 - 5 in FIG. 4 showing a corner of the container and the lid.
  • FIG. 6 is a plan view of a lid used for being attached to a container according to a second embodiment of the disclosure.
  • FIG. 7 is a schematic partial elevation view of a corner of a container with the lid of FIG. 6 attached to a flange of the container according to the second embodiment of the disclosure.
  • FIGS. 8 and 9 are schematic views of an exemplary forming tool for forming a container according to an exemplary embodiment.
  • the present disclosure relates generally to various aspects of containers, constructs, trays, materials, packages, elements, and articles, and methods of making such containers, constructs, trays, materials, packages, elements, and articles. Although several different aspects, implementations, and embodiments are disclosed, numerous interrelationships between, combinations thereof, and modifications of the various aspects, implementations, and embodiments are contemplated hereby.
  • the present disclosure relates to forming a container or tray for holding food items or various other articles.
  • the container or tray can be used to form other non-food containing articles or may be used for heating or cooking.
  • FIG. 1 illustrates a blank 3 that is used to form a container 5 ( FIGS. 2-5 ) having a flange 7 according to a first embodiment of the disclosure.
  • the blank 3 is generally rectangular and has generally straight side edges 9 , 11 and straight end edges 13 , 15 with rounded corners 17 , 19 , 21 , 23 extending between respective side edges and end edges.
  • the blank 3 is for being press formed into the container 5 that, in the illustrated embodiment, is a generally rectangular tray. It is understood that the blank 3 can be press-formed into the container 5 by a forming tool T (shown schematically in FIGS. 8 and 9 by way of example), which can be similar to and have similar features and/or components as conventional forming tools such as are disclosed in U.S. Pat.
  • T shown schematically in FIGS. 8 and 9 by way of example
  • the forming tool can have similar features and components such as the forming tool disclosed in U.S. Pat. No. 8,801,995, the entire contents of which are incorporated by reference for all purposes, or any other suitable forming tool assembly.
  • the blank 3 and the container 5 could be alternatively shaped (e.g., circular, oval, rectangular, annular, irregular, etc.) and/or any suitable forming tool could be used to form the container 5 from the blank 3 without departing from the scope of this disclosure.
  • the blank 3 can be formed from a single ply of material, such as but not limited to paperboard, cardboard, paper, or a polymeric sheet, but alternatively, the blank can be formed from a laminate that includes more than one layer.
  • the blank 3 can include a microwave interactive layer such as is common in MicroRite® containers available from Graphic Packaging International of Marietta, Ga.
  • the microwave interactive layer can be commonly referred to as, or can have as one of its components, a foil, a microwave shield, or any other term or component that refers to a layer of material suitable for shielding microwave energy and/or causing heating in a microwave oven.
  • the blank 3 has a longitudinal direction L 1 and a lateral direction L 2 , with the side edges 9 , 11 extending in the longitudinal direction L 1 and the end edges 13 , 15 extending in the lateral direction L 2 .
  • the blank 3 has a central portion 27 (i.e., bottom panel portion or bottom portion), two opposed side portions 29 , 31 (i.e., side panel portions or side wall portions), and two opposed end portions 33 , 35 (i.e., end panel portions or end wall portions).
  • four corner portions 37 , 39 , 41 , 43 are between adjacent respective side portions 29 , 31 and end portions 33 , 35 .
  • the blank 3 includes a flange portion 44 , which includes a marginal edge portion of the blank that includes the side edges 9 , 11 , the end edges 13 , 15 , and the corner edges 17 , 19 , 21 , 23 .
  • the flange portion 44 extends across the side portions 29 , 31 , end portions 33 , 35 and corner portions 37 , 39 , 41 , 43 .
  • Each corner portion 37 , 39 , 41 , 43 comprises a plurality of score lines 49 .
  • each corner portion 37 , 39 , 41 , 43 comprises ten score lines, but the corner portions could comprise more or less than ten score lines without departing from the disclosure.
  • the blank 3 could be generally circular, with score lines around the entire circumference of the blank without departing from the disclosure.
  • the corner portions 37 , 39 , 41 , 43 form a transition area between respective side portions 29 , 31 and end portions 33 , 35 .
  • the side portions 29 , 31 , the end portions 33 , 35 , and the corner portions 37 , 39 , 41 , 43 can form a wall portion that extends continuously around the central portion 27 in one embodiment.
  • the flange portion 44 which includes the outer edges 9 , 19 , 15 , 23 , 11 , 21 , 13 , 17 , can extend continuously around the perimeter of the blank 3 .
  • the score lines 49 extend across the corner portions 37 , 39 , 41 , 43 and into the flange portion 44 extending around each corner portion.
  • Each score line 49 has an outer end 51 that is spaced apart from a respective outer edge 17 , 19 , 21 , 23 of the blank, but the score lines could extend to the edge of the blank without departing from the disclosure.
  • the score lines 49 are formed on the interior surface 12 of the blank 3 such that the score lines 49 comprise slight indentations in the interior surface of the blank.
  • each of the score lines terminates at an inner end 53 that approximately corresponds to the transition between the respective corner portions 37 , 39 , 41 , 43 and the bottom portion 27 of the blank.
  • the score lines 49 could extend into the bottom portion 27 without departing from the disclosure.
  • the score lines 49 are all approximately the same length, with some of the score lines being in the longitudinal direction L 1 , some of the score lines being in the lateral direction L 2 , and some of the score lines being oblique relative to the longitudinal and lateral directions.
  • the score lines could be otherwise shaped, arranged, configured, and/or positioned without departing from the disclosure.
  • the score lines 49 could be of different lengths or could be otherwise positioned at various angles to facilitate forming the container 5 without departing from the disclosure.
  • FIGS. 2-5 show one embodiment of the disclosure comprising a container 5 formed from the blank 3 .
  • the container 5 comprises a bottom wall 103 , side walls 105 , 107 , end walls 109 , 111 , and corners 113 , 115 , 117 , 119 connecting respective adjacent side walls 105 , 107 and end walls 109 , 111 .
  • the side walls 105 , 107 , the end walls 109 , 111 , and the corners 113 , 115 , 117 , 119 generally form a wall that extends around the container 5 .
  • the flange 7 extends outwardly from respective side walls 105 , 107 , the end walls 109 , 111 , and the corners 113 , 115 , 117 , 119 (e.g., the flange 7 extends outwardly from the wall of the container 5 ) and extends continuously around the perimeter of the container 5 .
  • the bottom wall 103 is formed from the bottom portion 27 of the blank.
  • the side walls 105 , 107 are formed from respective side portions 29 , 31 of the blank, the end walls 109 , 111 are formed from respective end portions 33 , 35 of the blank, and the corners 113 , 115 , 117 , 119 are formed from the respective corner portions 37 , 39 , 41 , 43 (e.g., the wall of the container 5 is formed from the wall portion of the blank 3 ).
  • the container 5 has a cavity 127 or interior space that is defined by the bottom wall 103 , the side walls 105 , 107 , the end walls 109 , 111 , and the corners 113 , 115 , 117 , 119 extending upwardly from the bottom wall 103 .
  • the side walls 105 , 107 , the end walls 109 , 111 , and the corners 113 , 115 , 117 , 119 extend continuously around the cavity 127 .
  • the container 5 is for holding and/or cooking and/or heating a food product (not shown) that is placed in the interior space 127 of the container.
  • the blank 3 and the container 5 include a coating 131 that extends around the perimeter of the blank and the container in the flange region 44 and the flange 7 .
  • the coating 131 could be disposed on the portions of the flange region 44 including the score lines 49 (e.g., along and adjacent the corner portions 37 , 39 , 41 , 43 ) and the portions of the flange region 44 extending along the side portions 29 , 31 and end portions 33 , 35 that do not include score lines could be free of the coating 131 without departing from the disclosure.
  • the score lines 49 e.g., along and adjacent the corner portions 37 , 39 , 41 , 43
  • the coating 131 is shown as a cross-hatched area that at least partially covers the flange region 44 and the flange 7 , but the coating could be a transparent or translucent film or opaque layer without departing from the disclosure. As shown in the figures, the coating 131 covers a portion of the flange region 44 and the flange 7 and is spaced from the outer edge of the flange. Also, in the illustrated embodiment, the wall of the container 5 is free from contact with the coating 131 , and the coating 131 is spaced apart from the bottom wall 103 . Alternatively, the coating 131 could cover the entire flange 7 or could cover a different portion of the flange without departing from the disclosure.
  • the coating 131 could extend onto the side walls 105 , 107 , the end walls 109 , 111 , the corners 133 , 115 , 117 , 119 , and/or other parts of the container 5 without departing from the scope of the disclosure.
  • the coating 131 can be amorphous polyester, urethane, epoxy, acrylics, another suitable polymer, or any other suitable material.
  • the coating 131 can be applied to the material (e.g., web) from which the blank 3 is formed prior to die-cutting the blank 3 from the web of material. Alternatively, the coating 131 could be applied to the blank 3 after it is die cut from the web without departing from the disclosure.
  • the material selected for the coating 131 is printable and can be applied by screen printing, flexography, die-cutting/appliques, or other suitable application techniques.
  • the coating 131 can have a thickness of approximately 1-2 mils, or the coating could have a thickness that is more or less than approximately 1-2 mils without departing from the disclosure.
  • the score lines 49 form overlapped portions or pleats 135 ( FIGS. 3 and 5 ).
  • portions of the blank material can be gathered at the score lines 49 and pressed against the blank (e.g., by the forming tool T) in order to form the pleats 135 .
  • the pleats 135 could be otherwise formed without departing from the disclosure.
  • the overlapped portions 135 are in the flange 7 of the container 5 and the corners 113 , 115 , 117 , 119 , but the overlapped portions 135 could be otherwise arranged in the carton such as in one or more of the side walls 105 , 107 and/or end walls 109 , 111 .
  • the tray 5 could be other shapes, such as circular, and the overlapped portions or pleats 135 could extend around the entire perimeter of the tray without departing from the disclosure.
  • the overlapped portions 135 have a portion 137 of the coating 131 between the two portions of material 141 , 143 that form the overlapped portion 135 .
  • the portions of material 141 , 143 extending along each of the score lines 49 can fold against one another at the respective score line 49 with a portion 137 of the coating 131 disposed between the portions of material 141 , 143 .
  • the pleats 135 are shown as generally symmetric with the portions of material 141 , 143 and the portion 137 extending generally downwardly from the flange 7 .
  • any of the pleats 135 could be symmetric or asymmetric and/or the portions of material 141 , 143 could extend in a different direction without departing from the disclosure.
  • the portions of material 141 , 143 can be pressed against the flange 7 and/or the wall of the container 5 by the forming tool T as the container 5 is press formed.
  • the coating 131 covers the score lines 49 of the blank 3 before the carton 5 is formed, the coating 131 fills the gap between the portions 141 , 143 of material that form the pleats 135 .
  • the coating 131 also has a top portion 145 that forms a top surface 147 of the flange 7 that is substantially continuous. In one embodiment, the top surface 147 of the flange 7 is substantially flat, but the top surface may be contoured without departing from the disclosure.
  • the coating 131 covers and seals the pleats 135 to provide a sealing surface 147 of the flange 7 to allow a lid 151 ( FIGS.
  • the lid 151 can be sealed or bonded to the flange 7 of the tray 5 to keep the contents of the tray fresh by providing a moisture- and/or air-tight seal between the lid 151 and the sealing surface 147 of the flange 7 .
  • the corner 115 of the tray 5 is shown in FIGS. 3 and 5 , but the other corners 113 , 117 , 119 are similarly configured.
  • the flange can have a similar configuration as depicted in FIGS. 3 and 5 with the coating 131 filling the gap between the pleats 135 and forming a sealing surface 147 of the flange.
  • the coating 131 can provide a sealing surface 147 along portions of the flange 7 that do not include pleats.
  • the flange 7 and/or sealing surface 147 could be otherwise shaped, arranged, and/or configured without departing from the disclosure.
  • the lid 151 comprises packaging film that is a plastic layer used to preserve and protect a food item contained in the tray.
  • Any plastic film such as polystyrene, polyethylene, polypropylene, polyethylene terephthalate, polyvinylchloride, polyamide, and ethylene vinyl alcohol, or other suitable material, can be used.
  • the lidding film is a polystyrene film and the coating 131 comprises amorphous polyester, urethane, epoxy, and/or acrylics. Any other suitable material can be used for forming the lid 151 that is sealed against the sealing surface 147 of the flange 7 .
  • the lid 151 can be sealed against the sealing surface 147 by pressing the lid 151 against the flange 7 , heat welding, ultrasonic welding, and/or any other suitable sealing method. Further, adhesives can be used between the lid 151 and the sealing surface 147 without departing from the disclosure.
  • FIG. 6 is a plan view of an interior surface 350 of a lid 351 for being attached to a container 205 ( FIG. 7 ) according to an alternative embodiment of the disclosure.
  • the alternative embodiment is generally similar to the first embodiment, except for variations noted and variations that will be apparent to one of ordinary skill in the art. Accordingly, similar or identical features of the embodiments have been given like or similar reference numbers.
  • the lid 351 can include a marginal region 353 extending around a central region 355 .
  • a coating 331 similar or identical to the coating 131 of the first embodiment, can extend around the perimeter of the lid 351 in at least the marginal region 353 (as shown schematically in FIG. 6 by crosshatching). As shown schematically in FIG.
  • the lid 351 with the coating 331 can be attached to the flange 207 of the carton 205 with the coating 331 therebetween.
  • the coating 331 has an upper portion 345 that can form a substantially continuous surface 347 at the lid 351 and has portions 337 that can at least partially fill in any indentations or other features in the flange 207 at the pleats 135 to help form a moisture- and/or air-tight seal between the lid 351 and the flange 207 around the perimeter of the container 205 . Since the container 205 was press-formed without the coating 131 of the first embodiment, the portions 337 might not extend all the way between the portions of material 141 , 143 that form the pleats in one embodiment.
  • the lid 351 , the coating 331 , and/or the container 205 could be shaped, arranged, configured, and/or positioned without departing from the disclosure.
  • the coating 331 could cover more or less of the lid 351 than what is shown in FIG. 6 .
  • the blank 3 is formed into the container by conveying a blank and placing the blank in the forming tool T (schematically shown in FIGS. 8 and 9 by way of example) with a lower tool assembly L and upper tool assembly U in a separated or open position.
  • the forming tool T is used to press form the blank 3 into the container 5 by moving the tool assemblies L, U together, to a closed position ( FIG. 8 , for example).
  • the tool assemblies L, U can be separated ( FIG. 9 , for example) to release the container 5 .
  • pleats 135 or overlapped portions form at the score lines 49 in the blank.
  • the score lines 49 facilitate forming the flat blank 3 into the three-dimensional container 5 in the forming tool T.
  • the container 5 could be otherwise formed and/or could be formed by any suitable forming tool or forming tools without departing from the disclosure.
  • the forming tool T shown schematically in FIGS. 8 and 9 is included by way of example only.
  • the lid 351 with the coating 331 of the second embodiment can be attached to the flange 7 of the container 5 with the coating 131 of the first embodiment to enclose the cavity 127 of the container 5 .
  • one or more portions of the blank or other constructs described herein or contemplated hereby may be coated with varnish, clay, or other materials, either alone or in combination.
  • the coating may then be printed over with product advertising or other information or images.
  • the blanks or other constructs also may be selectively coated and/or printed so that less than the entire surface area of the blank or substantially the entire surface area of the blank may be coated and/or printed.
  • any of the blanks, containers, or other constructs of this disclosure may optionally include one or more features that alter the effect of microwave energy during the heating or cooking of a food item that is associated with the tray or other construct.
  • the blank, tray, container, or other construct may be formed at least partially from one or more microwave energy interactive elements (hereinafter sometimes referred to as “microwave interactive elements”) that promote heating, browning and/or crisping of a particular area of the food item, shield a particular area of the food item from microwave energy to prevent overcooking thereof, or transmit microwave energy towards or away from a particular area of the food item.
  • microwave interactive elements comprises one or more microwave energy interactive materials or segments arranged in a particular configuration to absorb microwave energy, transmit microwave energy, reflect microwave energy, or direct microwave energy, as needed or desired for a particular construct and food item.
  • the microwave energy interactive material may comprise an electroconductive or semiconductive material, for example, a vacuum deposited metal or metal alloy, or a metallic ink, an organic ink, an inorganic ink, a metallic paste, an organic paste, an inorganic paste, or any combination thereof
  • metals and metal alloys that may be suitable include, but are not limited to, aluminum, chromium, copper, inconel alloys (nickel-chromium-molybdenum alloy with niobium), iron, magnesium, nickel, stainless steel, tin, titanium, tungsten, and any combination or alloy thereof.
  • the microwave energy interactive material may comprise a metal oxide, for example, oxides of aluminum, iron, and tin, optionally used in conjunction with an electrically conductive material.
  • a metal oxide for example, oxides of aluminum, iron, and tin
  • ITO indium tin oxide
  • the microwave energy interactive material may comprise a suitable electroconductive, semiconductive, or non-conductive artificial dielectric or ferroelectric.
  • Artificial dielectrics comprise conductive, subdivided material in a polymeric or other suitable matrix or binder, and may include flakes of an electroconductive metal, for example, aluminum.
  • the microwave energy interactive material may be carbon-based, for example, as disclosed in U.S. Pat. Nos. 4,943,456, 5,002,826, 5,118,747, and 5,410,135.
  • the microwave energy interactive material may interact with the magnetic portion of the electromagnetic energy in the microwave oven. Correctly chosen materials of this type can self-limit based on the loss of interaction when the Curie temperature of the material is reached.
  • An example of such an interactive coating is described in U.S. Pat. No. 4,283,427.
  • the microwave energy interactive element may comprise a foil or high optical density evaporated material having a thickness sufficient to reflect a substantial portion of impinging microwave energy.
  • Such elements typically are formed from a conductive, reflective metal or metal alloy, for example, aluminum, copper, or stainless steel, in the form of a solid “patch” generally having a thickness of from about 0.000285 inches to about 0.005 inches, for example, from about 0.0003 inches to about 0.003 inches.
  • Other such elements may have a thickness of from about 0.00035 inches to about 0.002 inches, for example, 0.0016 inches.
  • microwave energy reflecting (or reflective) elements may be used as shielding elements where the food item is prone to scorching or drying out during heating.
  • smaller microwave energy reflecting elements may be used to diffuse or lessen the intensity of microwave energy.
  • One example of a material utilizing such microwave energy reflecting elements is commercially available from Graphic Packaging International, Inc. (Marietta, Ga.) under the trade name MicroRite® packaging material.
  • a plurality of microwave energy reflecting elements may be arranged to form a microwave energy distributing element to direct microwave energy to specific areas of the food item. If desired, the loops may be of a length that causes microwave energy to resonate, thereby enhancing the distribution effect.
  • Microwave energy distributing elements are described in U.S. Pat. Nos. 6,204,492, 6,433,322, 6,552,315, and 6,677,563, each of which is incorporated by reference in its entirety.
  • any of the numerous microwave energy interactive elements described herein or contemplated hereby may be substantially continuous, that is, without substantial breaks or interruptions, or may be discontinuous, for example, by including one or more breaks or apertures that transmit microwave energy.
  • the breaks or apertures may extend through the entire structure, or only through one or more layers. The number, shape, size, and positioning of such breaks or apertures may vary for a particular application depending on the type of construct being formed, the food item to be heated therein or thereon, the desired degree of heating, browning, and/or crisping, whether direct exposure to microwave energy is needed or desired to attain uniform heating of the food item, the need for regulating the change in temperature of the food item through direct heating, and whether and to what extent there is a need for venting.
  • a microwave energy interactive element may include one or more transparent areas to effect dielectric heating of the food item.
  • the microwave energy interactive element comprises a susceptor
  • such apertures decrease the total microwave energy interactive area, and therefore, decrease the amount of microwave energy interactive material available for heating, browning, and/or crisping the surface of the food item.
  • the relative amounts of microwave energy interactive areas and microwave energy transparent areas may be balanced to attain the desired overall heating characteristics for the particular food item.
  • one or more portions of a susceptor may be designed to be microwave energy inactive to ensure that the microwave energy is focused efficiently on the areas to be heated, browned, and/or crisped, rather than being lost to portions of the food item not intended to be browned and/or crisped or to the heating environment. Additionally or alternatively, it may be beneficial to create one or more discontinuities or inactive regions to prevent overheating or charring of the food item and/or the construct including the susceptor.
  • a susceptor may incorporate one or more “fuse” elements that limit the propagation of cracks in the susceptor, and thereby control overheating, in areas of the susceptor where heat transfer to the food is low and the susceptor might tend to become too hot.
  • the size and shape of the fuses may be varied as needed. Examples of susceptors including such fuses are provided, for example, in U.S. Pat. No. 5,412,187, U.S. Pat. No. 5,530,231, U.S. Patent Application Publication No. US 2008/0035634A1, published Feb. 14, 2008, and PCT Application Publication No. WO 2007/127371, published Nov. 8, 2007, each of which is incorporated by reference herein in its entirety.
  • the blanks according to the present invention can be, for example, formed from coated paperboard and similar materials.
  • the interior and/or exterior sides of the blanks can be coated with a clay coating.
  • the clay coating may then be printed over with product, advertising, price coding, and other information or images.
  • the blanks may then be coated with a varnish to protect any information printed on the blanks.
  • the blanks may also be coated with, for example, a moisture barrier layer, on either or both sides of the blanks.
  • the blanks may be constructed of paperboard of a caliper such that it is heavier and more rigid than ordinary paper.
  • the blanks can also be constructed of other materials, such as cardboard, hard paper, or any other material having properties suitable for enabling the carton package to function at least generally as described above.
US15/053,151 2015-02-27 2016-02-25 Container with Coating Abandoned US20160251117A1 (en)

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