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EP2399832B1 - Procédé d'emballage continu de produits et bande d'emballage de produits - Google Patents

Procédé d'emballage continu de produits et bande d'emballage de produits Download PDF

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Publication number
EP2399832B1
EP2399832B1 EP11005020.0A EP11005020A EP2399832B1 EP 2399832 B1 EP2399832 B1 EP 2399832B1 EP 11005020 A EP11005020 A EP 11005020A EP 2399832 B1 EP2399832 B1 EP 2399832B1
Authority
EP
European Patent Office
Prior art keywords
strip
band
seal
longitudinal edge
longitudinal
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.)
Not-in-force
Application number
EP11005020.0A
Other languages
German (de)
English (en)
Other versions
EP2399832A1 (fr
Inventor
Gerardus Franciscus Maria Langeveld
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.)
LH Flexibles BV
Original Assignee
LH Flexibles BV
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 LH Flexibles BV filed Critical LH Flexibles BV
Publication of EP2399832A1 publication Critical patent/EP2399832A1/fr
Application granted granted Critical
Publication of EP2399832B1 publication Critical patent/EP2399832B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B65B61/188—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements by applying or incorporating profile-strips, e.g. for reclosable bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/002—Flexible containers made from webs by joining superimposed webs, e.g. with separate bottom webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B65B9/2056—Machines for packages of special type or form

Definitions

  • the present invention relates to a method according to the preamble of claim 1.
  • the band generally comprises thermoplastic material and sealing is performed by, for example, heat or ultrasound.
  • the longitudinal direction is the direction of the band of sealable material. For a rectangular packaged product, this longitudinal direction does not necessarily correspond to the long side of the packaged product, but may correspond to the short side instead.
  • the seal being designed to facilitate opening of the product is generally designed to be a joint that is weaker than the band of sealable material.
  • a problem with the above method is that it can not be used for continually packaging products on an existing production line that is suitable for packaging products using a band of sealable material having two longitudinal edges, where a first seal is made at the two longitudinal edges of the band of sealable material in a first, longitudinal direction, and at least one second seal is made transverse to the first direction, but without any of the seals of the packaged product being designed to facilitate opening of the packaged product.
  • An object of the present invention is to provide a method that allows such a production line to be used for providing a packaged product having a breakable seal.
  • the invention according to the preamble is characterized by the characterizing part of claim 1.
  • Tape comprises a support provided with the PSA.
  • the support may be chosen such that the PSA adheres better to the support than to the strips, in particular than to the first side of the first strip, facilitating proper opening.
  • the first side of the tape i.e. its backside, is sealable using a method chosen from sealing using heat or ultrasound, so as to provide a properly closed second (transverse) seal.
  • the band used in the method according to the invention comprises tape having its second side, i.e. the side provided with PSA, applied to the first sides of the first strip and the second strip in the longitudinal direction of the band, effectively joining them together.
  • the breakable seal runs in the longitudinal direction and is, as will be clear, already present and a characteristic of the band before the product is being packaged.
  • the product to be packaged is a bulk material such as screws, sweets etc
  • the product will be placed on top of the band of sealable material and the longitudinal first seal will be made above the product. This is more important for products that come with dust, chaff etc than it is for products where the risk of product material ending up at the location where the first, longitudinal seal is made is reduced.
  • the product is provided in a tray, such as cookies
  • the longitudinal first seal will generally be made below the tray, as this improves the presentation of the product.
  • the packaged product will, in general, be turned over to present it to the customer, as the bottom side (having the breakable seal) is the most attractive, lacking the longitudinal first seal.
  • the band used in accordance with the invention is a laminate, it at least comprises sealable material at the (first) side of the band opposite to the (second) side of the band comprising the flap for opening the packaged product.
  • the band used in the method according the present invention will generally be supplied as a roll, just like the plain bands (i.e. not composed of joined strips) used in the prior art method. Even though the thickness of the band in the direction transverse to the longitudinal direction is not uniform, this does not give a problem although some care is recommended when handling a roll so as not to damage the edges.
  • the flap will, in general, have a width (in the transverse direction) of at least 1 cm, preferably at least 2 cm so as to provide sufficient grip for fingers.
  • An advantage of a packaged product according to the present invention having a wide flap is that it can be opened without thumbs. Often, packaged products require an amount of dexterity that even able-bodied people find difficult to provide.
  • the term "band" means a foil or film.
  • a band will in general have a width of at least 10 cm, such as at least 20 cm, but a suitable width will of course be chosen depending on the product to be packaged. Generally, the band will be sealable using a technique chosen from thermal sealing and ultrasonic sealing over the full width of the band.
  • the breakable seal comprises a pressure sensitive adhesive (PSA).
  • PSA pressure sensitive adhesive
  • a re-sealable breakable seal is provided, allowing the user of the package to easily open and easily close the package containing the product.
  • Re-sealing does not require peeling away a protective strip so as to expose an adhesive patch, as is known for re-sealable packaged products known in the art.
  • the second side of the second strip comprises sealable material, wherein providing the transverse second seal includes sealing the first side of the first strip to the second side of the second strip.
  • this allows the sealing of the flap to the second stip to serve as a marker that the packaged product has not been opened before. It also helps to prevent the flap from creasing, improving the presentation of the packaged product. Such a marker will also result if the strips used for manufacturing the band are not laminates, and the strips consist entirely of sealable material.
  • a band is used wherein the first longitudinal edge of the second strip tapers towards the first strip.
  • a smooth transition for the tape is provided helping to prevent the occurrence of a pinhole pore at the second seal in case the band comprises a tape to join the first and the second strips, or irrespective of the way the first and second strips are sealed at least a reduction of the size of the pinhole.
  • the present invention relates to a band as defined in claim 5.
  • Tape comprises a support provided with the PSA.
  • the support may be chosen such that the PSA adheres better to the support than to the strips, in particular than to the first side of the first strip, facilitating proper opening.
  • the first side of the tape i.e. its backside, is sealable using a method chosen from sealing using heat or ultrasound, so as to provide a properly closed second (transverse) seal.
  • the band used in the method according to the invention comprises tape having its second side, i.e. the side provided with PSA, applied to the first sides of the first strip and the second strip in the longitudinal direction of the band, effectively joining them together.
  • the band will at least partially be transparent so as to allow a consumer to view the contents of a packaged product.
  • the band will be in the form of a roll.
  • the flap will for example have a width of at least 1 cm, such as at least 2 cm.
  • the breakable seal comprises a pressure sensitive adhesive (PSA).
  • PSA pressure sensitive adhesive
  • a re-sealable seal is provided, allowing the user of the package to easily open and easily close the package containing the product.
  • Re-sealing of a product packaged using the band according to the invention will not require peeling away a protective strip so as to expose an adhesive patch, as is known for re-sealable packaged products known in the art.
  • the second side of the second strip comprises sealable material.
  • this allows the sealing of the flap to the second strip to serve as a marker that the packaged product has not been opened before.
  • the first longitudinal edge of the second strip tapers towards the first strip.
  • FIG. 1 schematically showing a band 100 comprising a first strip 110 and a second strip 120.
  • the first strip has two longitudinal edges 111 and 112.
  • the second strip 120 has two longitudinal edges 121 and 122.
  • the first strip 110 and the second strip 120 overlap partially, and are joined using tape 130 at a first side of the band 100. This leaves a part of the first strip 110 extending beyond the first longitudinal edge 121 of th second strip 120 free, and will be available as a lip (or flap) 113 that will allow easy opening of a packaged product packaged using the band 100, as will be explained later.
  • the strips 110 and 120 of the embodiment of Fig. 1 were 191 mm wide.
  • the flap 113 had a width of 57 mm so as to provide ample grip when used as a lip for opening. So, the total width of the band was 325 mm.
  • the width of the tape was 26 mm, 16 mm of which were in contact with strip 120.
  • Fig. 2 shows the area of the band 100 comprising the tape 130 in detail (but, like the other figures, not true to scale).
  • the first strip 110 and the second strip 120 both consist of two layers.
  • the first layer is made of a heat-sealable material, in this case cast polypropylene (CPP) with a thickness of 25 micrometers. It will be used to close the package once the product has been enveloped by the band 100, as explained later.
  • the second layer 202 is an air-impermeable layer, in this case polyethyleneterephtalate (PET) with a thickness of 12 micrometers.
  • PET polyethyleneterephtalate
  • the CPP and PET are separated by a layer of polyvinyl alcohol with a thickness of 1 um, but this is not of importance for the method and left out for reasons of clarity.
  • the person skilled in the art is all too familiar with the choice of packaging material and may consider non-olephinic materials such as aluminum and paper as a non-sealable layer of a strip as well.
  • the important aspect of the present invention is not the choice of material but the structure of the band, i.e. a band comprising two overlapping strips joined by a breakable seal, allowing the strips to be separated from each other.
  • the tape 130 is made of the same material as the first and second strips, but also provided with a Pressure Sensitive Adhesive layer 203.
  • the tape 130 serves two functions. Firstly, it keeps the first and second strips 110, 120 of the band 100 together. Once the product has been packaged, it not only allows the packaged product to be opened easily (using the lip 113), but also to be closed again as it forms a breakable seal 204.
  • the band 100 may be manufactured as follows. Two separate reels of plastic packaging film 110, 120 are unwound on a designated production machine and rewound again in a partially overlapping manner. With a tape dispenser attached to the production machine, the two individual films 110, 120 are taped together using tape 130 at one side of the band 100 before winding up. This results in the easy-opening lip 113 at the opposite side of the band 100.
  • the tape 130 comprises sealable material at the (first) side opposite to the side of the tape 130 comprising the PSA layer 203.
  • the reason is that once on a packaging machine the backside of the tape will be part of the end seals of the packaged product when heated. This creates a hermetically closed end (heat) seal.
  • An important advantage is that the band 100 according to the invention can be used using the same machines and the same packaging processes that currently use a band made of a single strip (of the same width as the band 100).
  • the use of the band 100 according to the invention results in an easy to open product, which is even re-closeable if a PSA was used to join the first strip 110 and the second strip 120 to form the seal 204 instead of a seal 204 formed by ultrasound.
  • the band 100 is folded around a product P to be packaged, and a longitudinal seal 301 is made by applying heat and pressure. Subsequently heat and pressure are applied in a transverse direction over the full width so as to provide second transverse (end) seals 401, 402. Average sealing temperatures are usually between 120 and 180°C. Suitable sealable materials are, for example, cast polypropylene and polyethylene.
  • the method in accordance with the present invention is suitable for products that require a controlled-gas atmosphere, in particular if the band used comprises a tape, because the adhesive will fill the void 271 ( fig. 2 ) that might otherwise result in a pinhole-sized pore at the seals 401 and 402 if the material of the band at the second side is not sealable as may be the case for a laminate such as discussed above ( fig. 2 ).
  • the first longitudinal edge 121 of the second strip 120 may be tapered towards the first strip of the band 100, as shown in fig. 5 .
  • a band comprising such a tapered edge may for example be made from foil material, that upon production thereof - or if in the form of a roll after unrolling - is cut using a tilted cutting device such as a rotating knife, a water jet or a laser so as to form a tapered second longitudinal edge 512 of a first strip 510 and a first longitudinal edge 521 of a second strip 520.
  • the two resulting strips 510, 520 are then partially superimposed and joined using tape 130 so as to result in band 500 of fig. 5 .
  • Other reference numbers in Fig. 5 correspond to their counterparts having the same number but starting with a 1 or 2 discussed for Fig. 1 and 2 .
  • the choice of the adhesive will be made depending on the type of material constituting the first and second strip. Generally, it will be desirable that the adhesive sticks better to the surface at the second side than for the surface of the strips at the first side, and that the adhesive has sufficient internal strength so as to avoid transfer of adhesive to the first strip upon opening of the package. However, this is not a strict requirement. If the adhesive is to fill a void such as void 271 as is desired for controlled gas-atmosphere packaging, an adhesive layer of sufficient thickness and suitable flow-properties under the circumstances of sealing (heat and pressure) will be chosen.

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

Claims (8)

  1. Procédé pour l'emballage continu de produits, dans lequel le produit est enveloppé par une bande (100) comprenant un matériau scellable ayant:
    un premier côté et un second côté, le premier côté étant agencé afin de permettre le scellement à l'aide d'une technique choisie parmi le scellement thermique et le scellement par ultrasons; et
    deux bords longitudinaux (111, 122);
    un premier joint d'étanchéité longitudinal est réalisé au niveau des deux bords longitudinaux de la bande (100) de matériau scellable dans une première direction longitudinale en mettant en contact des zones du premier côté au niveau des bords longitudinaux opposés, et au moins un second joint d'étanchéité (401, 402) est réalisé transversalement par rapport à la première direction longitudinale, le produit emballé ayant un joint d'étanchéité cassable (204) formé par deux couches chevauchantes conçues pour faciliter l'ouverture du produit emballé en séparant les couches formant le joint d'étanchéité cassable (204),
    la bande (100) comprenant une première bande (110) ayant un premier bord longitudinal (111) et un second bord longitudinal (112) et une seconde bande (120) ayant un premier bord longitudinal (121) et un second bord longitudinal (122), la première bande (110) et la seconde bande (120) se chevauchant partiellement étant assemblées dans une direction longitudinale par un joint d'étanchéité cassable (204), le joint d'étanchéité cassable (204) étant à une certaine distance à la fois du premier et du second bord longitudinal (111, 112) de la première bande (110) afin de former un rabat (113) au niveau du second côté de la bande (100) pour faciliter l'ouverture du produit emballé en séparant la première et la seconde bande (120) au niveau du joint d'étanchéité cassable (204) qui est utilisé pour emballer le produit, caractérisé en ce que la première bande (110) et la seconde bande (120) sont assemblées à l'aide du ruban (130) ayant un premier côté et un second côté, et comprenant un support, le support étant doté, au niveau du second côté, d'adhésif sensible à la pression, et le premier côté du support opposé au second côté comprenant un matériau scellable, le côté du ruban doté d'adhésif sensible à la pression étant appliqué sur les premiers côtés respectifs de la première bande (110) et de la seconde bande (120).
  2. Procédé selon la revendication 1, dans lequel le joint d'étanchéité cassable (204) comprend un adhésif sensible à la pression (PSA) (203).
  3. Procédé selon la revendication 1 ou 2, dans lequel le second côté de la seconde bande (120) comprend un matériau scellable (201), dans lequel l'étape consistant à prévoir le second joint d'étanchéité transversal (301) comprend l'étape consistant à sceller le premier côté de la première bande (110) sur le second côté de la seconde bande (120).
  4. Procédé selon l'une quelconque des revendications précédentes, dans lequel on utilise une bande (100), dans laquelle le premier bord longitudinal (121) de la seconde bande se rétrécit progressivement vers la première bande (110).
  5. Bande (100) comprenant un matériau scellable,
    un premier côté et un second côté, le premier coté de la bande (100) étant agencé pour permettre le scellement à l'aide d'une technique choisie parmi le scellement thermique et le scellement par ultrasons; et
    ayant deux bords longitudinaux (111, 122), la bande (100) comprenant un matériau scellable comprend une première bande (110) ayant un premier bord longitudinal (111) et un second bord longitudinal (112) et une seconde bande (120) ayant un premier bord longitudinal (121) et un second bord longitudinal (122), la première bande (110) et la seconde bande (120) se chevauchant partiellement étant assemblées dans une direction longitudinale par un joint d'étanchéité cassable (204), le joint d'étanchéité cassable (204) étant à une certaine distance à la fois du premier et du second bord longitudinal de la première bande (110) afin de former un rabat (113) au niveau du second côté pour faciliter la rupture du joint d'étanchéité (204) par la séparation de la première et de la seconde bande (120) au niveau du joint d'étanchéité cassable (204),
    caractérisée en ce que la première bande (110) et la seconde bande (120) sont assemblées en utilisant un ruban (130) ayant un premier côté et un second côté, et comprenant un support, le support étant doté, au niveau du second côté, d'adhésif sensible à la pression, et le premier côté du support opposé au second côté comprenant le matériau scellable, le côté du ruban doté d'adhésif sensible à la pression étant appliqué sur les premiers côtés respectifs de la première bande (110) et de la seconde bande (120).
  6. Bande selon la revendication 5, dans laquelle le joint d'étanchéité cassable (204) comprend un adhésif sensible à la pression (PSA) (203).
  7. Bande selon la revendication 5 ou 6, dans laquelle le second côté de la seconde bande (120) comprend le matériau scellable.
  8. Bande selon l'une quelconque des revendications 5 à 7, dans laquelle le premier bord longitudinal (121) de la seconde bande se rétrécit progressivement vers la première bande (110).
EP11005020.0A 2010-06-22 2011-06-21 Procédé d'emballage continu de produits et bande d'emballage de produits Not-in-force EP2399832B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1038061A NL1038061C2 (en) 2010-06-22 2010-06-22 A method of continually packaging products and a band for packaging products.

Publications (2)

Publication Number Publication Date
EP2399832A1 EP2399832A1 (fr) 2011-12-28
EP2399832B1 true EP2399832B1 (fr) 2013-06-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11005020.0A Not-in-force EP2399832B1 (fr) 2010-06-22 2011-06-21 Procédé d'emballage continu de produits et bande d'emballage de produits

Country Status (2)

Country Link
EP (1) EP2399832B1 (fr)
NL (1) NL1038061C2 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338019A (en) * 1962-08-22 1967-08-29 Johnson & Johnson Method of package manufacture
IT1286078B1 (it) * 1996-10-31 1998-07-07 Bg Pack S R L Procedimento per la produzione di una confezione ermetica richiudibile, in materiale flessibile, per prodotti vari,
DE102004040624B3 (de) * 2004-08-21 2006-02-16 Hdg Verpackungsmaschinen Gmbh Verfahren zur Herstellung eines geschlossenen Verpackungsbeutels

Also Published As

Publication number Publication date
EP2399832A1 (fr) 2011-12-28
NL1038061C2 (en) 2011-12-27

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