WO2023232485A1 - Plateau en carton - Google Patents

Plateau en carton Download PDF

Info

Publication number
WO2023232485A1
WO2023232485A1 PCT/EP2023/063371 EP2023063371W WO2023232485A1 WO 2023232485 A1 WO2023232485 A1 WO 2023232485A1 EP 2023063371 W EP2023063371 W EP 2023063371W WO 2023232485 A1 WO2023232485 A1 WO 2023232485A1
Authority
WO
WIPO (PCT)
Prior art keywords
parts
circumferential flange
flange
cardboard tray
side wall
Prior art date
Application number
PCT/EP2023/063371
Other languages
English (en)
Inventor
Ronald Zwaga
Original Assignee
Stackpack B.V.
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 Stackpack B.V. filed Critical Stackpack B.V.
Publication of WO2023232485A1 publication Critical patent/WO2023232485A1/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
    • B65D5/2014—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 the central panel having a non rectangular shape
    • B65D5/2033—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 the central panel having a non rectangular shape polygonal having more than four sides, e.g. hexagonal, octogonal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
    • B65D5/2038—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form at least two opposed folded-up portions having a non-rectangular shape
    • B65D5/2047—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form at least two opposed folded-up portions having a non-rectangular shape trapezoidal, e.g. to form a body with diverging side walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
    • B65D5/209—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 the adjacent edges of folded-up portions being joined by moulding seams in situ
    • 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

Definitions

  • the invention relates to a cardboard tray comprising :
  • circumferential flange composed out of abutting circumferential flange parts , each circumferential flange part being arranged, along a fold line , to the upper edge of one of the upstanding side wall parts , wherein the circumferential flange has a sealing zone , which extends along the circumferential flange and which spans at least part of the width of said circumferential flange .
  • Such a cardboard tray is known from DE 19654230 Al .
  • This tray is folded from a cardboard sheet and kept in shape with glue flaps connecting adj acent wall parts .
  • the tray is filled with for example fruit and vegetables and then a plastic film is sealed onto the circumferential flange .
  • a disadvantage is that any tension in the plastic film, which typically occurs , when the plastic film cools down to room temperature , causes the circumferential flange to curl upwardly to relieve the tension . This deteriorates the aesthetic appearance and also prevents stacking of similar sealed cardboard trays .
  • WO 2018 178508 discloses another cardboard tray .
  • This publication describes that there could occur a gap between abutting circumferential flange parts .
  • a butt seam is provided between the abutting edges of the circumferential flange parts .
  • a supporting flange is arranged to corner wall parts to ensure that the butt seam between said circumferential flange parts is not damage when processing the cardboard tray .
  • the supporting flange could be adhered to the circumferential flange parts , it is according to WO 2018 1785508 essential , that the supporting flange is dimensioned such that there is no overlap with the sealing zone , when viewed in a direction perpendicular to the sealing zone .
  • EP 3768118 proposes a cardboard tray with double folded circumferential flange parts , which are adhered to the outside of the upstanding side wall parts . This ensures that the flange parts are less likely to curl upwardly, when a plastic film is sealed onto the circumferential flange .
  • This obj ect is achieved according to the invention with a cardboard tray according to the preamble , which is characteri zed by strengthening flange parts arranged, along a fold line , to the upper edge of each upstanding corner wall part , wherein a strengthening flange part is adhered to both circumferential flange parts of the adj acent side wall parts ; wherein the strengthening flange parts at least partially overlap with the sealing zone , when viewed in a direction perpendicular to the sealing zone .
  • the corners are strengthened with the strengthening flange part being adhered to the circumferential flange parts .
  • the strengthening flange prevents the circumferential flange parts from folding up along the folding line as the folding line of the strengthening flange is at an angle with and of fset from the folding lines of the circumferential flange parts . Furthermore, because the strengthening flange is adhered to the circumferential flange parts , this double layer part of the circumferential can better withstand any bends or folds . Furthermore, due to the double layer part a tension is created between the circumferential flange parts and the strengthening flange part , when said double layer part is pulled upwardly . This tension counteracts the curling of the double layer part .
  • a cardboard tray is provided according to the invention, which is suitable for fruit and vegetables , i . e . can be provided with aeration openings , and which can be manufactured both inline and of fline . And due to the corner wall parts a rounded cardboard tray is provided which can be used with the same conventional top seal devices and tools , which are used for plastic trays .
  • the strengthening flange parts fully overlap the sealing zone in width direction of the circumferential flange .
  • the strengthening flange parts also overlap in circumferential direction for the full length of the strengthening flange parts .
  • adj acent upper edges of an upstanding side wall part and adj acent upstanding corner wall part are under an angle of larger than 0 ° and smaller than 90 ° , preferably larger than 35 ° and smaller than 55 ° , more preferably 45 ° .
  • the angle between the upper edges of the side wall parts and adj acent corner wall parts further contribute to the strength of the corners , where the strengthening flange part is adhered to the circumferential flange parts .
  • the combined angle of the abutting edges of two adj acent circumferential flange parts is smaller than the angle between the upper edges of the two upstanding side wall parts of said two adj acent circumferential flange parts .
  • At least one longitudinal end of at least one of the circumferential flange parts extending along an adj acent upstanding corner wall part is provided with a glue flap, which is adhered to said upstanding corner wall part .
  • the glue flap being adhered to the upstanding corner wall provides an additional connection between the circumferential flange and the corner wall . In combination with the strengthening flange of the corner wall , also adhered to the circumferential flange , this provides an even further rigid construction for the corner of the cardboard tray .
  • At least one of the upstanding side wall parts is provided with a glue flap, which is adhered to the adj acent upstanding corner wall part .
  • each of the above mentioned embodiments is that only the upstanding corner wall part is to be provided with a glue layer and that by a simple folding device , the cardboard tray can be folded from an unfolded sheet into a structurally sturdy cardboard tray . As soon as the glue has set , the cardboard tray will maintain its shape .
  • the cardboard tray according to the invention at least one of the circumferential flange parts comprise at least a first , a second and third elongate flange part section, which are connected parallel and along an elongate edge to each other, wherein the first elongate flange part section is arranged to the corresponding upstanding side wall part , the second elongate flange part section is double folded against the first elongate flange part section, and the third elongate flange part section is connected parallel and along an elongate edge to the second elongate flange part section, wherein the third elongate flange part section is adhered either on the inside or the outside of the corresponding upstanding side wall part .
  • circumferential flange parts extending along the upstanding side wall parts are strengthened, so not only the corners of the tray but also the sides are strengthened .
  • Such strengthened circumferential flange parts are described in WO 2019 179930 .
  • Still another embodiment of the cardboard tray according to the invention further comprises a plastic film, which plastic film covers the cardboard tray and is sealed along the circumferential flange at the sealing zone .
  • an amount of glue or adhesive is arranged between each strengthening flange part and both corresponding circumferential flange parts , wherein the amount of glue or adhesive extends between the abutting edges of the circumferential flange parts .
  • the glue or adhesive is used to adhere the strengthening flange to the circumferential flange parts , but also to fill any gaps which occur between the abutting edges of the circumferential flange parts . This ensures that when a plastic film is laminated to the inside of the cardboard tray, no grooves are formed at the transition from one circumferential flange part to the other . A fully smooth sealing surface is then created allowing for airtight sealing of a plastic film covering the cardboard tray .
  • Figure 1 shows a perspective view of a first embodiment of a cardboard tray according to the invention .
  • Figure 2 shows the unfolded sheet for the cardboard tray according to figure 1 .
  • Figure 3 shows a cross-section along the line I I I- I I I in figure 1 .
  • Figure 4 shows a bottom view of a corner of the cardboard tray of figure 1 .
  • Figure 5 shows a part of an unfolded sheet for a second embodiment of a cardboard tray according to the invention .
  • Figure 6 shows a cross-section of a cardboard tray folded out of the unfolded sheet of figure 5 .
  • Figure 7 shows a perspective view of part of a third embodiment of a cardboard tray according to the invention .
  • Figure 8 shows a cross-section of the cardboard tray of figure 7 .
  • Figures 9A and 9B show a cross-sectional view of a detail of a corner of a cardboard tray according to the invention .
  • Figure 1 shows a perspective view of a first embodiment of a cardboard tray 1 according to the invention .
  • the cardboard tray 1 has an eight-sided bottom wall part 2 along the circumference upstanding side wall parts 3 alternated with upstanding corner wall parts 4 are arranged .
  • Abutting circumferential flange parts 5 are arranged along a fold line 6 to the upper edge of one of the upstanding side wall parts 3 .
  • Each of the circumferential flange parts 5 extend on each longitudinal end beyond the fold line 6 to border part of an adj acent corner wall part 4 .
  • strengthening flange parts 7 are arranged, along a fold line 8 , to the upper edge of each upstanding corner wall part 4 .
  • the strengthening flange parts 7 are adhered to the bottom side of the extending flange parts 5 to keep the cardboard tray 1 in the folded position .
  • Figure 3 shows a cross section of the cardboard tray 1 according to the invention .
  • the strengthening flange 7 is adhered to the bottom of the circumferential flange part 5 .
  • a sealing zone 9 is defined on the circumferential flange 5 to which a plastic sheet 10 is sealed .
  • the strengthening flange 7 spans at least part of the width of said circumferential flange 9 such that the sealing zone 9 is at least partially and preferably, as shown, fully overlapped by the strengthening flange 7 ( see figure 4 ) .
  • Figure 5 shows a part of an unfolded sheet for a second embodiment of a cardboard tray 20 according to the invention .
  • the cardboard tray 20 has a bottom wall part 21 with upstanding side wall parts 22 and corner wall parts 23 .
  • the side wall parts 22 have each a circumferential flange part 24 , 25 .
  • the circumferential flange part 24 , 25 extends in longitudinal direction with an end 25 over the strengthening flange part 26 arranged to the corner wall part 23 . This is similar to the embodiment 1 shown in figure 1 .
  • the bottom edge 27 , 28 of the side wall parts 22 is formed partially by a cut line 27 and partially by a fold line 28 .
  • the cut line 27 will form a foot element which will space the bottom wall part 21 from any underground on which the cardboard tray 20 is placed .
  • the tcombined angle eg and a 2 of the abutting edges of the two adj acent circumferential flange parts 24 , 25 is smaller than the angle p between the upper edges of the two upstanding side wall parts 22 of said two adj acent circumferential flange parts 24 , 25 .
  • the circumferential flange parts 24 , 25 need to slope down ( see figure 6 ) in order for the longitudinal edges to abut and form a smooth circumferential flange . Because the circumferential flange slopes down, additional strength is provided to the cardboard tray 20 .
  • FIG. 7 shows a third embodiment of a cardboard tray 30 according to the invention .
  • the cardboard tray 30 has a bottom wall part 31 with upstanding side wall parts 32 and corner wall parts 33 .
  • a first 34 , a second 35 and third 36 elongate flange part section are connected parallel and along an elongate edge to each other , ( see also figure 8 )
  • the first 34 , a second 35 and third 36 elongate flange part section are double folded with the third elongate flange part section 36 adhered to the side wall part 32 .
  • This provides a strong flange along the side wall part 32 .
  • Such a double folded flange could also be provided for the other side wall parts of the tray .
  • the second elongate flange part section 35 extends in longitudinal direction along the upper edge of the corner wall part 33 .
  • This corner wall part 33 is provided with a strengthening flange (not shown) similar to the embodiments 1 and 20 .
  • the elongate flange part section 35 is provided at the end with glue flaps 37 which are adhered to the corner wall part 33 .
  • the side wall parts 32 are furthermore provided with glue flaps 38 along the side edges , which glue flaps 38 are adhered to the corner wall part 33 .
  • corner wall part needs to be provided on one side with an adhesive for the full cardboard tray to be folded into its shape .
  • Figure 9A and 9B show a detail of a corner of a cardboard tray 40 similar to any of the previous embodiments .
  • the corner has a corner wall part 41 with a strengthening flange 42 adhered with a glue layer 45 to the bottom side of circumferential flange parts 43 , 44 .
  • a cardboard tray By designing the radius of the corners of the circumferential flange , the width of the circumferential flange and the width of the side wall parts and corner wall parts , a cardboard tray can be provided, which corresponds in dimensions to conventional plastic trays . This allows for a user to keep the existing top seal devices and tools , without any additional investments , and easily switch between plastic trays and cardboard trays and even handle both types through each other .
  • the strengthened corners of the cardboard tray according to the invention ensures that the elongate sides of the tray are suf ficient strong that a cardboard tray, filled with for example fruit or vegetables , will hang into the tools of existing top seal devices , similar to a plastic tray .
  • the elongate sides will not bend such that a filled cardboard tray falls from the top seal device .

Landscapes

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

Abstract

L'invention se rapporte à un plateau en carton comprenant : - une partie de paroi inférieure ; agencées le long de la circonférence de la partie de paroi inférieure, un certain nombre de parties de paroi latérale verticales alternées avec le même nombre de parties de paroi de coin verticales ; - une bride circonférentielle composée de parties de bride circonférentielles en butée, chaque partie de bride circonférentielle étant agencée, le long d'une ligne de pliage, sur le bord supérieur de l'une des parties de paroi latérale verticales ; des parties de bride de renforcement agencées, le long d'une ligne de pliage, sur le bord supérieur de chaque partie de paroi de coin verticale, une partie de bride de renforcement étant collée aux deux parties de bride circonférentielles des parties de paroi latérale adjacentes ; la bride circonférentielle présentant une zone d'étanchéité, qui s'étend le long de la bride circonférentielle et qui s'étend sur au moins une partie de la largeur de ladite bride circonférentielle, et les parties de bride de renforcement chevauchant au moins partiellement la zone d'étanchéité, lorsqu'elles sont vues dans une direction perpendiculaire à la zone d'étanchéité.
PCT/EP2023/063371 2022-05-31 2023-05-17 Plateau en carton WO2023232485A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22176509.2A EP4286288A1 (fr) 2022-05-31 2022-05-31 Plateau en carton
EP22176509.2 2022-05-31

Publications (1)

Publication Number Publication Date
WO2023232485A1 true WO2023232485A1 (fr) 2023-12-07

Family

ID=81854358

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/063371 WO2023232485A1 (fr) 2022-05-31 2023-05-17 Plateau en carton

Country Status (2)

Country Link
EP (1) EP4286288A1 (fr)
WO (1) WO2023232485A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4417882A (en) * 1979-10-30 1983-11-29 Sprinter System Ab Method and apparatus for erecting a carton tray
DE19654230A1 (de) 1996-12-23 1998-07-02 Jochen Dietrich Lebensmittelverpackung, Verfahren zur Herstellung einer sauerstoffdichten Verpackung, Vorrichtung zur Durchführung eines derartigen Verfahrens und dabei verwendete zusammenhängende Kartonschnitte
US20060006215A1 (en) * 2004-07-08 2006-01-12 Jung-Chih Chen Paper meal box
WO2018078508A1 (fr) 2016-10-24 2018-05-03 The Trustees For The Time Being Of The Kmn Fulfilment Trust Composant électromagnétique comprenant de la magnétite destiné à être utilisé dans un générateur
WO2018178508A1 (fr) 2017-03-29 2018-10-04 Jospak Oy Emballage de produit et son procédé de fabrication et ébauche d'emballage de produit
WO2019179930A1 (fr) 2018-03-22 2019-09-26 Stackpack B.V. Plateau en carton et procédé
WO2022107181A2 (fr) * 2020-11-23 2022-05-27 Lic Packaging S.P.A Processus de production de plateau alimentaire et plateau ainsi produit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4367035A1 (fr) 2021-07-09 2024-05-15 WestRock Packaging Systems, LLC Procédé de formation de contenants ayant un bord supérieur à coins collés, mêmes contenants, et ébauches pour former de tels contenants

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4417882A (en) * 1979-10-30 1983-11-29 Sprinter System Ab Method and apparatus for erecting a carton tray
DE19654230A1 (de) 1996-12-23 1998-07-02 Jochen Dietrich Lebensmittelverpackung, Verfahren zur Herstellung einer sauerstoffdichten Verpackung, Vorrichtung zur Durchführung eines derartigen Verfahrens und dabei verwendete zusammenhängende Kartonschnitte
US20060006215A1 (en) * 2004-07-08 2006-01-12 Jung-Chih Chen Paper meal box
WO2018078508A1 (fr) 2016-10-24 2018-05-03 The Trustees For The Time Being Of The Kmn Fulfilment Trust Composant électromagnétique comprenant de la magnétite destiné à être utilisé dans un générateur
WO2018178508A1 (fr) 2017-03-29 2018-10-04 Jospak Oy Emballage de produit et son procédé de fabrication et ébauche d'emballage de produit
WO2019179930A1 (fr) 2018-03-22 2019-09-26 Stackpack B.V. Plateau en carton et procédé
EP3768118A1 (fr) 2018-03-22 2021-01-27 Stackpack B.V. Plateau en carton et procédé
WO2022107181A2 (fr) * 2020-11-23 2022-05-27 Lic Packaging S.P.A Processus de production de plateau alimentaire et plateau ainsi produit

Also Published As

Publication number Publication date
EP4286288A1 (fr) 2023-12-06

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