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WO2019030533A1 - Boîte empilable - Google Patents

Boîte empilable Download PDF

Info

Publication number
WO2019030533A1
WO2019030533A1 PCT/GB2018/052273 GB2018052273W WO2019030533A1 WO 2019030533 A1 WO2019030533 A1 WO 2019030533A1 GB 2018052273 W GB2018052273 W GB 2018052273W WO 2019030533 A1 WO2019030533 A1 WO 2019030533A1
Authority
WO
WIPO (PCT)
Prior art keywords
base
box
walls
wall
panel
Prior art date
Application number
PCT/GB2018/052273
Other languages
English (en)
Inventor
Simon TIMPSON
Original Assignee
Tri-Pack Plastics 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 Tri-Pack Plastics Ltd filed Critical Tri-Pack Plastics Ltd
Priority to US16/637,403 priority Critical patent/US20200180814A1/en
Priority to EP18769769.3A priority patent/EP3681808A1/fr
Publication of WO2019030533A1 publication Critical patent/WO2019030533A1/fr

Links

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
    • 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
    • B65D5/24—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 adjacent sides interconnected by gusset folds
    • B65D5/241—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 adjacent sides interconnected by gusset folds and the gussets folds connected to the inside of the container body
    • B65D5/243—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 adjacent sides interconnected by gusset folds and the gussets folds connected to the inside of the container body the container body comprising a continuous rim or flange
    • 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
    • B65D21/00—Nestable, stackable or joinable containers; Containers of variable capacity
    • B65D21/02—Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together
    • 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
    • B65D5/001—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 stackable
    • B65D5/0015—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 stackable the container being formed by folding up portions connected to a central panel
    • B65D5/003—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 stackable the container being formed by folding up portions connected to a central panel having ledges formed by extensions of the 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
    • B65D5/36—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 specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections
    • B65D5/3607—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 specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections formed by folding or erecting a single blank
    • B65D5/3635—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 specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections formed by folding or erecting a single blank by folding-up portions connected to a central panel from all sides to form a container body
    • B65D5/3642—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 specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections formed by folding or erecting a single blank by folding-up portions connected to a central panel from all sides to form a container body the secured corners presenting diagonal, bissecting or similar folding lines, the central panel presenting no folding line
    • B65D5/3657—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 specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections formed by folding or erecting a single blank by folding-up portions connected to a central panel from all sides to form a container body the secured corners presenting diagonal, bissecting or similar folding lines, the central panel presenting no folding line the adjacent sides being interconnected by gusset folds
    • 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
    • B65D5/22—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 held erect by extensions of one or more sides being doubled-over to enclose extensions of adjacent sides
    • 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
    • B65D5/24—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 adjacent sides interconnected by gusset folds
    • B65D5/248—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 adjacent sides interconnected by gusset folds and at least one side being extended and doubled-over to enclose the adjacent gusset flaps

Definitions

  • This invention relates to a box suitable, for example, for the transportation of whole fish such as salmon.
  • the boxes contain melting ice, they must be capable of retaining strength when wet and, especially when transported by air freight, of resisting leakage of water. These requirements limit the choice of alternative materials that might be more readily recycled.
  • the sheet material can be cut and creased to form a blank which can be transported to the packing place and then readily assembled into a box for use. After use, the boxes can readily be flattened for transport to a recycling plant, for example in the vehicle that transport- ed the fish.
  • the material is smooth and impervious, it can be easily washed before being melted down to produce reusable plastics materials which can, for example be used to produce new sheet materials.
  • the recycling of the boxes is therefore more economically viable than with conventional polystyrene fish boxes.
  • WO2017/089742 discloses a stackable box formed from a twin-wall olefin plastics sheet material as a cut and pre-creased blank that can be transported as a flat blank and then assembled at the point of use into an open box having a surrounding upper surface or ledge which can facilitate stacking of the boxes and ensure rigidity when loaded. While such boxes are economical to transport to the point of use as flat blanks and can be leak-proof and so espe- cially suited to the carriage of fish in ice, the assembly at the point of use requires a relatively complex, and therefore costly, machine, and the capital investment required can make the use of such boxes uneconomic.
  • GB2125772A discloses an open-topped cardboard box or tray which can be pre-folded to a flat form which can be opened out for use by lifting the sides, causing the ends to lift with them because of an attached gusset. Assembly is then completed by folding over the end panels and inserting locking tabs into slots in the base of the box. Multiple gusset portions have to be folded into place in order to achieve assembly, requiring time and a certain amount of skill to complete. The cost of using such a box is therefore still unacceptably high, and the box cannot be made leak-proof for the carriage of fish in ice, for example.
  • JP2923557B discloses a box with a frame around its upper edge, assembled from a single sheet of board which can be pre-folded to a flat form in a similar manner to that of GB2125772A. If formed of suitable material it can be made leak-proof, but requires inset folded and glued panels to create the double walls at the sides reducing strength and the insulation value afforded by the double walls, which may be important where the boxes are used for fish packed in ice, for example.
  • the present invention provides a stackable box having side walls and end walls upstanding from a base, the box being formed from a single sheet of material cut and creased to provide, between each end of each side wall and the adjacent end wall a diagonally creased panel, the diagonal crease extending from the intersection between the base, the side wall and the end wall, the side walls being folded over on to the base and the portion of each diagonally creased panel between the diagonal and the end wall being secured to the end wall, whereby, when the side walls are pulled upwardly and outwardly from the base, the end walls are lifted, and wherein each side wall has along the upper edge thereof a ledge panel extending inwardly of the box and parallel to the base and the end walls each have a flap along the upper edge thereof which is foldable over to extend parallel to the base and to co-operate with the ledge panels to hold the box in shape and provide a continuous ledge surface around the open upper face of the assembled box.
  • Each of the side walls incorporates a secondary side panel with a fixing strip therealong secured to the base whereby to form double side walls.
  • the portions of the diagonally creased panels secured to the end wall are preferably secured by adhesive, as are the fixing strips, where used.
  • the flaps on the end walls may each be provided with an additional outer flap which can be folded under and into engagement with the ledge panels. Alternatively, the flaps may be secured using welding or adhesive.
  • the sheet material is preferably a plastics sheet material, such as a twin wall olefin plastics sheet material, and more preferably the twin wall plastics material is formed with internal webs or flutes between the twin walls extending vertically in the side walls of the box.
  • the box of the invention is transportable as a flat blank, thereby min- imising the cost of transport of the empty boxes to the packing plant, but are straightforward to erect into a usable box, by hand or using simple, and therefore low cost, machinery.
  • Figures 1 is a perspective view of a cut and creased blank according to a first embodiment before forming into a box;
  • Figures 2 to 7 are corresponding views to Figure 1 illustrating the successive stages in forming the box from the blank;
  • Figure 8 is a perspective view of a cut and creased blank according to a second embodiment before forming into a box.
  • Figures 9 to 13 are corresponding views to Figure 8 illustrating the successive stages in forming the box from the blank.
  • a sheet of twin-walled fluted polypropylene is cut and creased, for example by pressing the sheet on to a first tool having a predetermined pattern of knives and heated creasing bars upstanding therefrom, thereby forming a box blank 1 as shown in Figure 1 .
  • the cut edges are represented by solid lines, while the creases are represented by broken lines.
  • the heated creasing bars serve to provide permanently indented lines along which the sheet can be folded to erect the box. It will be appreciated that while heated creasing bars will be suitable for forming creases in thermoplastic sheet materials, other materials may require different configurations for forming creases, for example knives to form scored lines in the materi- al.
  • the blank 1 consists of a rectangular base panel 2 having along two opposed longer edges rectangular side panels 3 and 4 which can be folded up at right angles to the base panel.
  • Each side panel 3 and 4 has along its outer edge a connecting web 8, 5 leading to a secondary side panel 7, 6.
  • the con- necting webs 8, 5 are each dimensioned to form a narrow ledge along the top edge of the respective side panel 3, 4 when the box is assembled.
  • Each secondary side panel 7, 6 has along its outer edge a fixing strip 10, 9 respectively.
  • the base panel also has rectangular end panels 1 1 and 14 along the opposed shorter sides thereof, each end panel being provided with a pair of joined flaps 12, 13 and 15, 16 respectively along the outer edge thereof.
  • Each side panel 3, 4 is joined to each end panel 1 1 and 14 through a respective corner panel 17, 18, 19 and 20, each of which is of generally square shape, but with a rounded outer corner, and is provided with a diagonal reverse crease extending from the corner of the base panel 2 outwardly.
  • the box blank is first formed in the factory by folding inwards the panels 7 and 10 on to side panel 3, and the panels 6 and 9 on to side panel 4. Glue is then applied along the fixing strips 9 and 10 and the diagonally-divided portions of the corner panels 17-20 that are adjacent to the end panels 1 1 and 14. It will be seen that the glue application can be carried out as a linear operation as the blank is moved in a lengthwise direction. Additional glue may need to be applied to the diagonally-divided portions outwardly of the first line of glue to ensure adequate adhesion.
  • Figures 4 to 7 show the successive stages of erection of the box at the point of use. This can be done manually, although it would be possible to effect machine assembly as well.
  • the composite side panels 4-6 and 3, 8, 7 are pulled away from the base panel 2 so as to rotate to an upright position. This lifts the end panels 1 1 and 14 as the corner panels 17-20 fold along the diagonal lines.
  • Figure 4 illustrates the commencement of this action and
  • Figure 5 illustrates the fully lifted side and end panels.
  • the side panels and secondary side panels now form double walls, with the fixing strips 9 and 10 anchoring to the base panel 2 and serving the hold the secondary panels 6 and 7 parallel to the respective side panels 4 and 3 with the connecting webs 8, 5 forming a ledge parallel to the base panel 2 along each side panel.
  • the joined flaps 12, 13 and 15, 16 are then folded over to bring the panels 12 and 15 to rest on the ledges 8 and 5 as shown in Figure 6.
  • the outer flaps 13 and 16 can be omitted, the flaps 12 and 15 being welded to the ledges 5 and 8 at each side to hold the box in shape in a machine-erection step.
  • the box of Figures 1 to 7 is particularly suitable for larger loads, such as whole salmon, the double side walls giving additional strength and rigidity, smaller boxes used for lighter loads, may omit the double side walls, as shown in Figures 8 to 13, in which the parts in common with the first embodi- ment bear the same reference numerals.
  • the differences in the blank, shown in Figure 8, are that the secondary side panels and fixing strips are omitted so that the connecting webs 8, 5 become relatively widened ledge pieces.
  • the first factory manufacturing step is simply the gluing of the diagonally-divided portions of the corner panels 17-20, which is followed by folding in of the side panels 3 and 4 and pressing of the corner panels until the glue has set, as shown in Figure 9.
  • the blanks can then be transported flat to the point of use.
  • the smaller boxes may be provided with a simplified lid, as their inherent rigidity, and the fact that they will not be loaded as heavily, does not re- quire a full lid.
  • a simple sheet of the same material as used in the construction of the box can be configured with simple side flaps engaging under the ledge pieces to hold it in place, or a sheet can be welded in place to the ledge pieces 5 and 8 and/or the flaps 12 and 15.
  • the closure could, alternatively be a simple sheet of plastics film or foil welded or glued to the peripher- al upper surfaces 5, 8, 12 and 15 of the box.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)

Abstract

L'invention concerne une boîte empilable ayant des parois latérales (3, 4) et des parois d'extrémité (11, 14) se dressant depuis une base (2), la boîte étant formée à partir d'une seule feuille de matériau découpée et plissée de manière à fournir, entre chaque extrémité de chaque paroi latérale et la paroi d'extrémité adjacente, un panneau plissé en diagonale (17-20), le pli diagonal s'étendant à partir de l'intersection entre la base, la paroi latérale et la paroi d'extrémité. Les parois latérales sont repliées sur la base et la partie de chaque panneau plissé en diagonale (17-20) entre la diagonale et la paroi d'extrémité est fixée à la paroi d'extrémité (11, 14), moyennant quoi, lorsque les parois latérales (3, 4) sont tirées vers le haut et vers l'extérieur à partir de la base, les parois d'extrémité (11, 14) sont levées. Chaque paroi latérale a, le long de son bord supérieur, un panneau de rebord (8, 5) s'étendant vers l'intérieur de la boîte et parallèlement à la base (2) et les parois d'extrémité (11, 14) ont chacune un rabat (12, 15), le long de leur bord supérieur, qui peut être replié de façon à s'étendre parallèlement à la base et à coopérer avec les panneaux de rebord pour maintenir la boîte dans sa forme et fournir une surface de rebord continue autour de la face supérieure ouverte de la boîte assemblée. Chacune des parois latérales comporte un panneau latéral secondaire (6, 7) avec une bande de fixation (9, 10) le long de celui-ci fixée à la base (2) de sorte à former des parois latérales doubles.
PCT/GB2018/052273 2017-08-09 2018-08-09 Boîte empilable WO2019030533A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US16/637,403 US20200180814A1 (en) 2017-08-09 2018-08-09 Stackable box
EP18769769.3A EP3681808A1 (fr) 2017-08-09 2018-08-09 Boîte empilable

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1712736.6A GB2565311A (en) 2017-08-09 2017-08-09 Box
GB1712736.6 2017-08-09

Publications (1)

Publication Number Publication Date
WO2019030533A1 true WO2019030533A1 (fr) 2019-02-14

Family

ID=59894983

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2018/052273 WO2019030533A1 (fr) 2017-08-09 2018-08-09 Boîte empilable

Country Status (4)

Country Link
US (1) US20200180814A1 (fr)
EP (1) EP3681808A1 (fr)
GB (1) GB2565311A (fr)
WO (1) WO2019030533A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE2150938A1 (en) * 2021-07-14 2023-01-15 Stora Enso Oyj A blank for foming a package and a package formed from such a blank

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11794941B2 (en) * 2019-02-06 2023-10-24 Nalto Marketing Ltd. Plant item packaging
JP7444015B2 (ja) * 2020-10-07 2024-03-06 王子ホールディングス株式会社 トレイ
US11370576B1 (en) * 2021-01-29 2022-06-28 International Paper Company Straddle flange top seal punnet
JP7472855B2 (ja) 2021-06-03 2024-04-23 王子ホールディングス株式会社 トレイ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0656145A (ja) * 1992-08-03 1994-03-01 Dainippon Printing Co Ltd 段ボール箱
JP2002308249A (ja) * 2001-04-12 2002-10-23 J Pack:Kk 紙製折込み箱
US20080223911A1 (en) * 2007-03-16 2008-09-18 Richard Mazurek Gift box container

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125772B (en) * 1982-07-13 1986-03-12 Unilever Plc Stackable trays
JP2923557B1 (ja) * 1998-06-18 1999-07-26 陽夫 岡本 枠縁付組立箱
GB2544743B (en) * 2015-11-24 2019-06-26 Tri Pack Plastics Ltd Stackable box

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0656145A (ja) * 1992-08-03 1994-03-01 Dainippon Printing Co Ltd 段ボール箱
JP2002308249A (ja) * 2001-04-12 2002-10-23 J Pack:Kk 紙製折込み箱
US20080223911A1 (en) * 2007-03-16 2008-09-18 Richard Mazurek Gift box container

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE2150938A1 (en) * 2021-07-14 2023-01-15 Stora Enso Oyj A blank for foming a package and a package formed from such a blank
WO2023285958A1 (fr) * 2021-07-14 2023-01-19 Stora Enso Oyj Ébauche permettant de former un emballage et emballage formé à partir d'une telle ébauche
SE545061C2 (en) * 2021-07-14 2023-03-14 Stora Enso Oyj A blank for foming a package and a package formed from such a blank

Also Published As

Publication number Publication date
EP3681808A1 (fr) 2020-07-22
GB201712736D0 (en) 2017-09-20
US20200180814A1 (en) 2020-06-11
GB2565311A (en) 2019-02-13

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