EP3434618A2 - Verbesserter lebensmittelbehälterdeckel und verfahren zur herstellung davon - Google Patents

Verbesserter lebensmittelbehälterdeckel und verfahren zur herstellung davon Download PDF

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Publication number
EP3434618A2
EP3434618A2 EP18275107.3A EP18275107A EP3434618A2 EP 3434618 A2 EP3434618 A2 EP 3434618A2 EP 18275107 A EP18275107 A EP 18275107A EP 3434618 A2 EP3434618 A2 EP 3434618A2
Authority
EP
European Patent Office
Prior art keywords
container
heat
lid
lid portion
substrate
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.)
Withdrawn
Application number
EP18275107.3A
Other languages
English (en)
French (fr)
Other versions
EP3434618A3 (de
Inventor
Jonathan Preston
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.)
Sirap Uk Ltd
Sirap Uk Ltd
Original Assignee
Sirap Uk Ltd
Sirap Uk Ltd
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 Sirap Uk Ltd, Sirap Uk Ltd filed Critical Sirap Uk Ltd
Publication of EP3434618A2 publication Critical patent/EP3434618A2/de
Publication of EP3434618A3 publication Critical patent/EP3434618A3/de
Withdrawn legal-status Critical Current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
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0214—Removable lids or covers without integral tamper element secured only by friction or gravity
    • 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
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or 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
    • 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
    • B65D77/2004—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being maintained on the container by mechanical means, e.g. crimping, clamping, riveting
    • B65D77/2016—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being maintained on the container by mechanical means, e.g. crimping, clamping, riveting the cover being maintained by projections or recesses on the container
    • 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
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00037—Disc closures
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00314—Combination, e.g. laminates, several different materials
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00342—Central part of the lid
    • B65D2543/00351—Dome-like
    • B65D2543/00361—Dome-like placed on a tray like container

Definitions

  • the present invention relates to a lid for a food container, as well as a food container with said lid and method of manufacturing said lid.
  • the lid comprises a substrate, typically carton board, which has a heat seal film laminated to a surface thereof, the substrate configured such that it will cover at least the peripheral edge of an open top of a container, and the heat seal film configured such that it will cover the entire open top of said container.
  • lidded containers such as thermoformed lidded pots.
  • the container or pot is provided with a heat-sealed film which covers the open top of the container, sealing the food therein.
  • the heat seal may provide a hermetic seal or it may allow some moisture to travel there-through.
  • Additional printed sleeves e.g. a card sleeve
  • substantially rigid lids which may have branding and other information printed thereon, can then be placed over, or partially over, the heat-sealed portion.
  • lidded pots Whilst such lidded pots are widely used, they do have some drawbacks. In particular, there are cost and weight implications as both a heat seal film and separate lid and or sleeve are typically required by retailers. This is mainly because the heat seal film is not a good surface for printing on and as such branding and other information must be printed onto a separate material. This can be using stickers directly onto the pot of heat seal film, but it is often visually preferable for retailers to have more substantial material such as a card sleeve or rigid lid as this provides a more appealing look to consumers.
  • heat-sealable films/materials or heat sealing this includes both traditional heat-sealing films/materials which are heated by the direct or indirect application of temperature, and may also encompass materials which seal due to dielectric heating of the material e.g. by using high frequency welding. However, it is noted that traditional heat-sealable films are preferred.
  • a food container lid portion configured to re-closably seal the open top of a pre-formed food container, comprising; a cartonboard substrate defining at least an outer circumference; and a heat-sealable film membrane, wherein said heat-sealable film membrane is laminated to a surface of the substrate, and wherein said substrate is configured such that it will cover at least the peripheral edge of said open top of said food container; and said film is configured such that it is able to entirely cover said open top of said food container when associated therewith.
  • the cartonboard substrate can be printed onto directly this removes the need to have a lid with branding, instructions or ingredient information and a separate lidding film to provide a seal for the food in the container, leading to a reduction in both processing costs and packaging weight.
  • the laminated structure of the lid portion provides a level of additional rigidity when compared to traditional lidding film, it also allows the food container to be more easily removed by a user and then maintain its structure such that the lid can then be re-closed if required by the user. Further, the laminated structure ensures that it is cost effective to manufacture.
  • the lid of the present invention can therefore effectively replace traditional lidding film and separate sleeve or rigid lid with a single improved lid portion.
  • the heat-sealable film is laminated to the surface of the substrate that forms the internal surface of the food container when associated with the lower pot portion.
  • this is the surface that comes into contact with the foodstuff in the container and it precludes the foodstuff coming into contact with the substrate, which is typically a cartonboard material.
  • the preformed container is a plastic container.
  • the preformed container is a preformed thermoplastic container.
  • the heat sealable film is a food safe material.
  • the heat sealable film is water impermeable.
  • the heat sealable film may be permeable or semipermeable to allow moisture to escape.
  • the heat sealable film is a membrane, effectively a thin pliable sheet of material forming a barrier or lining but which has its own structure, as opposed to a coating.
  • the substrate is semi-rigid or substantially rigid.
  • the substrate imparts a desired degree of rigidity to lid portion.
  • the substrate must be able to transfer heat to the surface which the heat sealable film is laminated thereto from a heat source provided at the opposing surface i.e. if heat is applied to the outer or upper surface it must be transferred to the opposing inner or lower surface to which the heat sealable film is laminated.
  • the heat sealable film is transparent.
  • the heat sealable film is a membrane.
  • the membrane may be made of PET.
  • the membrane may be provided with a heat seal coating to form the heat seal film.
  • the substrate may comprise one or more apertures or windows.
  • the heat sealable film can be viewed through said aperture, and when the heat sealable film is transparent the content of a container can be viewed without the lid portion being removed.
  • the lid is planar.
  • the lid may be shaped and provided with planar sealing flanges or sections.
  • the pre-formed food container is a pot or tray.
  • the pre-formed food container is made from plastic.
  • This may be Polyethylene Terephthalate (PET), e.g. C-PET (crystal-PET), R-PET (recycled PET), A-PET (amorphous PET), or polypropylene.
  • PET Polyethylene Terephthalate
  • the pre-formed food container is made from A-PET (amorphous PET) due to its substantially transparent properties that are often preferred for food packaging, particularly for higher quality foodstuffs.
  • the lid portion is resiliently deformable.
  • the lid is provided with a tab portion.
  • a lidded container comprising; a formed lower container section, said container section comprising a base portion with at least one side wall extending generally upwards therefrom to form an open topped container, and the lid portion of the above aspect, where said lid portion is heat-sealed to a peripheral edge of the open topped container such that it will act as a top wall and close the container section.
  • the formed lower container is a pot or tray for holding foodstuff.
  • the pre-formed food container is made from plastic.
  • This may be Polyethylene Terephthalate (PET), e.g. C-PET (crystal-PET), R-PET (recycled PET), A-PET (amorphous PET), or polypropylene.
  • PET Polyethylene Terephthalate
  • the pre-formed food container is made from A-PET (amorphous PET) due to its substantially transparent properties that are often preferred for food packaging, particularly for higher quality foodstuffs.
  • the upper peripheral edge of the open top portion of the lower container section comprises a sealing flange to which the lid portion is heat sealed.
  • a sealing flange may extend outwards from the outer surface of the side wall.
  • the sealing flange comprises a ridge at least partially defining its circumference.
  • the lid portion is heat-sealed around the entire peripheral edge of the open top portion of the lower container section. This may provide a completely sealed compartment.
  • the lid portion is heat-sealed at selected points around the peripheral edge of the open top portion of the lower container section. This holds the lid in position and results in a closed compartment, but doesn't fully seal the compartment.
  • the upper portion of the one or more side walls of the lower container section is provided with an undercut feature.
  • the undercut feature is formed in the ridge.
  • the circumference defined by the top part of the ridge is smaller than the circumference defined by the lower part of the ridge.
  • the circumference defined by the top part of the ridge is smaller than the outer circumference of the planar lid.
  • the undercut feature is present just below the upper peripheral edge and is effectively a recessed groove.
  • the undercut or recessed groove extends around the inner circumference of the one or more side walls.
  • the undercut or recessed groove is positioned between 0.1mm and 5.0mm below the top of the one or more side walls.
  • the undercut or recessed groove is sized to receive the resiliently deformable lid portion.
  • the one or more side walls define a circumference smaller that the circumference of the lid, and the circumference of the uppercut or recessed groove is larger than the circumference of the lid such that the lid can be pushed into the undercut to close the lower container.
  • the lid portion may be pushed into the uppercut or recessed groove to reclose the lower container.
  • a method of manufacturing the lid portion of the first aspect comprising the steps; providing the substrate on a reel; providing the heat-sealable film; laminating the heat sealable film to the substrate using inline lamination; and cutting the peripheral shape of the lid.
  • the peripheral shape of the lid includes an extension portion.
  • the extension portion may be attachable to a lower container e.g. to include information regarding ingredients etc.
  • the method comprises the step of printing on the substrate prior to the step of laminating the heat sealable film to the substrate using inline lamination.
  • the method comprises the step of cutting one or more apertures or windows in the substrate prior to the step of laminating the heat sealable film to the substrate using inline lamination. Preferably this occurs after the step of printing on the substrate if such step is present.
  • the method may comprise the final step of sealing the lid to a pre-formed lower container.
  • the present invention relates to food container lids 1,1' that are used to close pre-formed food containers.
  • the lid 1 is formed from a substrate 2 such as cartonboard which has a heat sealable film 3 laminated thereto.
  • the heat sealable file is a PET membrane however it would be appreciated that any appropriate heat sealable film could be used.
  • the film could comprise a membrane with a coating of heat sealable material thereon.
  • the substrate 2 imparts a level of rigidity to the lid that is not found in the heat-sealable film alone.
  • the substrate maybe a continuous piece of material, or as depicted in Figure 2 it may have one or more windows 4 in the form of apertures cut from it. The window allows the heat sealable film to be seen, however the substrate still forms a frame 13 to impart the necessary rigidity to allow the lid to remain appropriately shaped even when it is detached from a lower container or pot.
  • cartonboard is the preferred substrate material.
  • Cartonboard is made from cellulose fibres that are produced either from timber or by reusing recovered fibre or waste paper. A combination of the two can be used and there are various types of fibre that produce different characteristics.
  • up to three layers of coating, made of clay and chalk predominantly, are added to the surface of the board. These coatings improve smoothness and gloss and are required to achieve the high-quality printing that is needed on cartons.
  • FIG. 2 shows a particular embodiment of the present invention.
  • a lower container 5 is provided, which is a preformed pot made from thermoformed A-PET.
  • the lower pot 5 has a base 6 and four side walls 7 which extend upwardly from the base to define an open topped cavity suitable for holding a range of foodstuffs such as confectionery, salads, coleslaws, pre-prepared meals etc.
  • the upper periphery of the side walls comprises a sealing flange 8.
  • the sealing flange 8 also has a ridge 9 running partially around the its outer circumference. The ridge is shaped to receive the lid portion snugly within its circumference.
  • the ridge 9 may have an undercut feature such that the circumference defined by the top part of the ridge 9 is smaller than both the circumference defined by the lower part of the ridge and the outer circumference of the planar lid 1. This allows the lid 1 to be push fit into the undercut portion and effectively re-closed if required.
  • an undercut feature is provided in the upper portion of the side walls 7 and again acts to receive the lid 1 if re-closure of the pot is required.
  • the lid 1 is provided with a frame portion 13 which is made from cartonboard with heat seal film laminated thereto, wherein the lid 1 also has a window 4 where there is only heat seal film (as shown in Figure 1b ).
  • the lid 1 is heat sealed onto the sealing flange 8 of the lower pot 5.
  • the lid also has a tab 10 which extends from a section of the lid 1 to allow the lid 1 to easily be grasped and pulled by a user to remove the heat sealed lid 1.
  • the ridge 9 on the lower pot 5 has a space which accommodates the tab 10. In this embodiment the space is at a corner, however one skilled in the art will appreciate a tab 10 could be positioned anywhere around the circumference and can be produced in different sizes.
  • the tab 10 could also be configured to fit into an aperture in the lower pot 5 to secure it in position when re-closed.
  • the lid 1 also has an extension portion 11 that can wrap around the outer surface of the lower pot 5 onto the outer surface of the base 6.
  • the extension portion 11 has score lines 12 which assist with the folding of the extension portion around the lower pot 5 and also tearing the extension portion 11 to remove the lid portion if required.
  • Figure 3 shows an alternative lid embodiment which does not include an extension portion.
  • FIG. 4a shows a blank that can be formed into a lid of the present invention whilst 4b shows the lid and an exemplary base (it would be understood that although the image is indicative, the base walls would typically be higher).
  • the lower pot 5" has a base 6" and a plurality of side walls 7" which extend upwards therefrom to define a cavity into which foodstuff is placed.
  • there is an additional sealing flange 80 which extends outwards from the side walls 7" at substantially the same plane as the base 6" (in fact it may be considered as an extension of the base 6").
  • the lid portion 1" is shaped such that it has a roof 14 and one or more lid side walls 15 that extend down therefrom.
  • a lid could be formed using conventional methods by folding and adhering portions of a blank formed from the laminated substrate and heat seal film.
  • the inner circumference defined by the inside of the lid side walls 15 is slightly larger than the outer circumference defined by the side walls 7 such that the lid 1" can fit neatly over the lower pot 5".
  • the lid portion 1" may also have one or more lid flanges 16 extending substantially perpendicularly from the lower part of the lid side walls 15 which will align with the additional sealing flange of the lower pot 5" when the lid 1" is placed on the lower pot 5".
  • the lid 1" can be heat sealed to the lower pot 5" either at the additional sealing flanges, at the sealing flange 8" at the periphery of the top of the side walls 7", or both.
  • the lid is manufactured using an inline lamination method.
  • the cartonboard substrate goes through as a reel. If required, the board is printed, and if required, windows or apertures are cut in the cartonboard as it passes.
  • the cartonboard is then inline laminated to a membrane of heat seal film.
  • the heat seal film is a continuous sheet and, unlike the cartonboard does not have windows or apertures cut therein. A peripheral cut is then made to give the outer shape of the lid portion and separate it from the reel.
  • the lid portion can be folded and adhered using conventional methods.
  • the lid can then be heat sealed to a thermoformed or other lower pot or container as described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Closing Of Containers (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Package Specialized In Special Use (AREA)
EP18275107.3A 2017-07-28 2018-07-24 Verbesserter lebensmittelbehälterdeckel und verfahren zur herstellung davon Withdrawn EP3434618A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1712203.7A GB2565065A (en) 2017-07-28 2017-07-28 An improved food container lid and method of manufacturing the same

Publications (2)

Publication Number Publication Date
EP3434618A2 true EP3434618A2 (de) 2019-01-30
EP3434618A3 EP3434618A3 (de) 2019-03-20

Family

ID=59779008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18275107.3A Withdrawn EP3434618A3 (de) 2017-07-28 2018-07-24 Verbesserter lebensmittelbehälterdeckel und verfahren zur herstellung davon

Country Status (2)

Country Link
EP (1) EP3434618A3 (de)
GB (1) GB2565065A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4206088A1 (de) * 2021-12-29 2023-07-05 Leef Blattwerk GmbH Verpackung für einen artikel und verpackter artikel

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410697A (en) * 1965-02-12 1968-11-12 Brown Co Laminated closure for food trays having heat-retractable window
US3672916A (en) * 1970-08-31 1972-06-27 Mass Feeding Corp Food tray having a laminated closure that is heat-retractable
US3934749A (en) * 1974-09-11 1976-01-27 Polysar Plastics, Inc. Plastic container
US20070023433A1 (en) * 2005-07-29 2007-02-01 Pekka Vahavihu Resealable container lid and method
GB0602532D0 (en) * 2006-02-09 2006-03-22 Alexir Packaging Ltd Foldable container
GB2457943A (en) * 2008-02-29 2009-09-02 Colpac Ltd Film coated blank for forming foodstuff container
JP5326422B2 (ja) * 2008-08-20 2013-10-30 凸版印刷株式会社 蓋材
JP2011148515A (ja) * 2010-01-20 2011-08-04 Toppan Printing Co Ltd 蓋材
US9032698B2 (en) * 2011-07-07 2015-05-19 Berry Plastics Corporation Package with lid sealing system
JP6060503B2 (ja) * 2012-03-19 2017-01-18 凸版印刷株式会社 蓋材および該蓋材を用いた包装容器
GB2528134A (en) * 2014-07-11 2016-01-13 Colpac Ltd Film lidded tray

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4206088A1 (de) * 2021-12-29 2023-07-05 Leef Blattwerk GmbH Verpackung für einen artikel und verpackter artikel

Also Published As

Publication number Publication date
EP3434618A3 (de) 2019-03-20
GB201712203D0 (en) 2017-09-13
GB2565065A (en) 2019-02-06

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