EP3074317A1 - Dispositif permettant d'ouvrir un contenant pour produits versables - Google Patents

Dispositif permettant d'ouvrir un contenant pour produits versables

Info

Publication number
EP3074317A1
EP3074317A1 EP14828522.4A EP14828522A EP3074317A1 EP 3074317 A1 EP3074317 A1 EP 3074317A1 EP 14828522 A EP14828522 A EP 14828522A EP 3074317 A1 EP3074317 A1 EP 3074317A1
Authority
EP
European Patent Office
Prior art keywords
tooth
vertex
punchable
side face
collar
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.)
Granted
Application number
EP14828522.4A
Other languages
German (de)
English (en)
Other versions
EP3074317B1 (fr
Inventor
Arne MOHN
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.)
Ipi SRL
Original Assignee
Ipi SRL
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 Ipi SRL filed Critical Ipi SRL
Publication of EP3074317A1 publication Critical patent/EP3074317A1/fr
Application granted granted Critical
Publication of EP3074317B1 publication Critical patent/EP3074317B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/72—Contents-dispensing means
    • B65D5/74—Spouts
    • B65D5/746—Spouts formed separately from the container
    • B65D5/747—Spouts formed separately from the container with means for piercing or cutting the container wall or a membrane connected to said wall
    • B65D5/748—Spouts formed separately from the container with means for piercing or cutting the container wall or a membrane connected to said wall a major part of the container wall or membrane being left inside the container after the opening

Definitions

  • the present invention relates to a device for opening a container suitable for containing pourable products.
  • the opening device of the present invention is positioned at the punchable portion of a multilayer container and comprises a collar, couplable right at the above mentioned punchable portion, and a cutting element movable inside the collar, once the device has been assembled, in a way constrained by helical guide means interposed between said cutting element and said collar.
  • the cutting element has a plurality of teeth having a substantially triangular section and each provided with an upper ending portion having a vertex adapted to cut the punchable portion when the cutting element helically slides with respect to said collar, as the container is opening.
  • tip, or vertex, or free end of the upper ending portion is therefore the tooth portion which first contacts the punchable portion and undergoes the greatest stresses, also and especially because the cutting element travels along a path not exactly perpendicular with respect to the punchable portion, but along a substantially helical path.
  • Closing devices of this type are known in the art.
  • the European Patent EP1088764 Bl in the name of Tetra Laval describes an opening device of the above described type wherein, in particular, the cutting element is formed in one piece with the collar, thereby forming a single pre-assembled body.
  • this type of closing devices is provided with a cutting element having a plurality of teeth provided with an ending portion having a perfectly sharpened vertex.
  • opening devices are not free from drawbacks, because of the increasing difficulty in easily opening the punchable portion of the container on which they are applied.
  • the layers forming the container at the punchable portion comprise a first outer layer made of a thermoplastic material, a layer made of aluminum and one or more inner layers made of thermoplastic material.
  • An adhesive layer is arranged between the aluminum layer and the thermoplastic layers so as to allow the two layers to be coupled.
  • Such laminar, or multilayer, material provides a good structural stiffness at the punchable portion and is further studied to create a barrier preventing pathogenic substances and also, especially, oxygen from entering into the container. This prevents the product stored in the container such as, for example, milk or other beverages, from deteriorating within few days.
  • increasingly reliable thermoplastic materials have been developed and introduced, causing, however, an increase of the characteristics of overall mechanical strength of the multilayer material, due in particular to the increased toughness thereof, therefore resulting in a greater and gradually increasing difficulty in carrying out the first cut of the punchable portion by means of the cutting elements of the known art.
  • the blends of thermoplastic materials contain materials such as, for example, LLDPE and LDPE which, although on one hand have improved the sealing characteristic of the punchable portion, on the other hand have extremely increased the toughness of the whole material.
  • LLDPE and LDPE which, although on one hand have improved the sealing characteristic of the punchable portion, on the other hand have extremely increased the toughness of the whole material.
  • the Proprietor further noted that, with these types of multilayer materials, the teeth of the known cutting elements are no longer able to effectively cut off the punchable portion of the container and, anyway, the operation for opening the container results in an excessive effort for the tooth of the cutting element, especially at the sharpened vertex thereof. As a result, during the opening operation, the sharpened vertex of the tooth bends, such that the ability of punching and opening the container is compromised.
  • LLDPE Linear Low Density Polyethylene
  • m-PE metallocene polyethylene
  • LDPE Low Density Polyethylene
  • characteristics of LLDPE are high shear strength and puncture resistance, whereas LDPE has the advantage of allowing an efficient and safe heat welding and provides, among other functions, the moisture- barrier function.
  • the opening device of the type constrainable to a multilayer container for products pourable at one punchable portion thereof comprising a collar couplable to said punchable portion, and a cutting element moving inside said collar in a way constrained by helical guide means interposed between said cutting element and said collar, said cutting element comprising at least one first tooth having a substantially triangular section and provided with at least one ending portion having at least one vertex, to punch said at least one punchable portion, said at least one ending portion is rounded at least next to said at least one vertex, characterized in that said at least one tooth is provided with at least two flanks, at least one side face, at least one cutting edge defined by the intersection of said at least one side face and at least one of said at least two flanks, said at least one cutting edge being connected over said at least one ending portion, next to said at least one vertex.
  • said at least one vertex instead of being sharpened, as provided in the known art devices, is substantially rounded so that the vertex of the tooth, although still able to punch the punchable portion, cannot be bent as the cutting element roto- translates with respect to the collar, i.e. the former helically moves with respect to the latter.
  • the Proprietor experienced that the vertex of the tooth is no longer subject to any kind of bending caused by the excessive stress applied thereto during the opening of the container due to the increased toughness of the multi-layer materials used nowadays.
  • the vertex of the tooth once punched the punchable portion, it contacts the cutting edge of the tooth itself, thus making easy the following cutting step of the punchable portion.
  • the ending portion extends among said at least two flanks and said at least one side face in order to increase the overall stiffness of the ending portion itself.
  • said at least one portion extends obliquely with respect to said at least one side face such as to allow the vertex to more easily penetrate the punchable portion.
  • the angle defined between the axis lying on said at least one ending portion and the vertical axis lying on said at least one side face is comprised between 20° and 50°.
  • the cutting element is made of polypropylene.
  • the tooth is provided with two flanks, an outer side face and an inner side face opposite to one another, at least one cutting edge defined by the intersection of one of the two side faces with at least one of the two flanks, the cutting edge being connected over the ending portion, next to the vertex.
  • the cutting edge is defined by the intersection of the outer side face with at least one of the two flanks.
  • said at least one ending portion has a curvature radius between 0.15 and 0.30 mm at least next to said at least one vertex.
  • the Proprietor has experienced that this value range of the curvature radius allows to obtain a good balance among the feasibility in realizing the mould, the tooth effectiveness in punching and the elimination of vertex bends of the ending portion of the tooth.
  • the opening device further comprises an upper cap couplable by screwing with said collar.
  • This cap drives the helical displacement of said at least one cutting element with respect to said collar as the container is opening.
  • said cutting element has at least one second tooth having triangular section and provided with at least one upper ending portion having a sharpened vertex, to punch said at least one punchable portion, wherein said at least one second tooth is arranged, with respect to said at least one first tooth, in such a way that said at least one second tooth is meshed with said punchable portion before said at least one first tooth as said cutting element helically moves with respect to said collar.
  • such second tooth unlike said at least one tooth, has at least one sharpened vertex and is designed to mesh the punchable portion so as to prevent the rounded vertex of said at least one tooth from sliding on the punchable portion thus causing the laminate, constituting the punchable portion, to yield.
  • said at least one punchable portion comprises at least one aluminum layer, one or more layers made of thermoplastic material arranged on the inner and/or outer surface of said aluminum layer, and at least one adhesive layer arranged between said one or more thermoplastic layer and said at least one aluminum layer.
  • a multilayer container for pourable products defined by a laminate comprising a paper layer and provided with a punchable portion at a zone of the container provided with a hole in the paper layer
  • the container is characterized by comprising an opening device according to the invention and what has been previously described, the opening device being constrained at the punchable portion.
  • figure 1 shows an opening device applied on a container for pourable products
  • figure 2 shows a section of the container of figure 1 without the opening device and at its punchable portion
  • figure 3 is an axonometric, longitudinal sectional view of the opening device according to the invention.
  • figure 4 is an axonometric view of the cutting element of figure 3; figure 5 is a particular view of the teeth of the cutting element of figure 4; figure 6 is a particular view of a general first tooth of the cutting element of figures 4 and 5.
  • figure 7 is a particular view of a second tooth of the cutting element of figures 4 and 5.
  • an opening device according to the invention is referred to with the numeral 1.
  • Figure 1 shows an opening device 1 according to the invention and constrained to a multilayer container 2 for pourable products at a punchable portion 3 thereof (figure 2).
  • said punchable portion 3 of the multilayer container 2 is located at a zone of the container 2 where the paper layer 49, included in the laminate, has a hole 49a.
  • this punchable portion 3 comprises an aluminum layer 50 arranged inside the laminate, a layer 51 of thermoplastic material, arranged outside the container on the outer surface of the aluminum layer, two layers 52 and 53 of thermoplastic material arranged inside the container 2 on the inner surface of said aluminum layer 50, and an adhesive layer 54 arranged between the aluminum layer 50 and the layers 52 and 53 of thermoplastic material directly contacting said aluminum layer 50.
  • Such opening device 1 made of polypropylene, or similar plastic material, comprises a collar 4 couplable around the aforesaid punchable portion 3 and a cutting element 5 moving inside the collar 4 in a way constrained by helical guide means 60 interposed between the cutting element 5 and the collar 4.
  • helical guide means 60 comprise, in a known way, threaded elements 30 and 31 arranged on the outer surface 5a of the cutting element 5 and on the inner surface 4a of the collar 4, respectively..
  • the cutting element 5 moves inside the, collar 4 along a helical guide path up to reach the punchable portion 3 of the container 2 in order to cut it as the container 2 itself is used for the first time.
  • the cutting element 5 comprises a plurality of first teeth 6 each provided with two flat flanks 8 and 9, two side faces 10, an outer one 10a and an inner one 10b opposite to one another, in which the outer side face 10a comprises, in common with one 8 of the two flanks 8 and 9, a cutting edge 11 substantially defined by the intersection of the side face 10a with one 8 of the two flanks 8 and 9.
  • This cutting edge 11 causes the tear of the punchable portion 3 of the container 2 as the cutting element 5 helically moves with respect to the collar 4.
  • each first tooth 6 is provided with an ending portion 7 having a vertex 7a to punch the punchable portion 3 as the tooth contacts the latter.
  • the vertex 7a of the ending portion 7 is the part of the first tooth 6 first contacting the punchable portion 7.
  • said ending portion 7 is rounded next to said vertex 7a.
  • said ending portion 7 has a curvature radius r (see figure 6) of 0.22 mm next to said vertex 7a.
  • an embodiment of the opening device 1 having the curvature radius r of the ending portion 7, next to the vertex 7a, comprised between 0.15 and 0.30 mm, is still within the protection scope of the present invention.
  • such cutting edge 11 is connected over the ending portion 7, next to the vertex 7a.
  • the first tooth 6, although still having a cutting edge 11, has a vertex 7a no longer sharpened, as taught in the opening devices of the known art, but slightly rounded, nevertheless the tooth still allows to punch and then tear the punchable portion by means of the vertex 7a of the tooth 6 and the cutting edge 1 1 , respectively.
  • said ending portion 7 extends among said two side flanks 8 and 9 and said side faces 10a and 10b thereby being shaped as a rounded surface having a curvature radius equal to or substantially similar to the curvature radius of the vertex 7a along its whole extent.
  • the X axis lying on said ending portion 7 forms an angle of about 36° with respect to the Y axis lying on the outer side face 10a of the first tooth 6.
  • said ending portion 7 extends obliquely with respect to the outer side face 10a at an angle A of 36° . In other embodiments, this angle A can range from 20° to 50° without thereby departing from the protective scope of the present invention.
  • this angle A can range from 20° to 50° without thereby departing from the protective scope of the present invention.
  • there is a vertex 7a which, while having a rounded shape, is still able to punch the punchable portion 3.
  • the tooth can be provided with more than two flanks.
  • the tooth also can be provided with only one side face, as well as with more than two side faces.
  • the cutting profile is defined by the intersection of a side face with one of the flanks and is connected over the ending portion next to the vertex.
  • the cutting edge is defined by the intersection of the inner side face, or a side face other than the inner side face, with at least one of the flanks.
  • flanks 8, 9 are flat, they can have different shapes, for example they can be concave or convex with respect to the hypothetical ray extending from the base of the tooth 6 to the vertex 7a.
  • the opening device 1 further comprises an upper cap 12 couplable by screwing on said collar 4.
  • the cap 12 actually drives the helical displacement of the cutting element 5 with respect to the collar 4, as the container 2 is opening.
  • an opening device 1 without said cap 12 is still within the protective scope of the present invention.
  • said cutting element 5 comprises a second tooth 20 having triangular section and provided with at least one upper ending portion 21 having a sharpened vertex 21a, just alike the known art devices.
  • Such second tooth 20 is arranged in such a way that, with respect to the above described teeth 6, it first meshes with said punchable portion 3 with respect to said first teeth 6 having a rounded vertex 7a as the cutting element 5 helically moves relative to said collar 4.
  • this second tooth 20 unlike the first teeth 6, has a sharpened vertex 21a and is designed to mesh the punchable portion 3 such that the latter is properly stretched.
  • this solution prevents the rounded vertexes 7a of the first teeth 6 from sliding on the punchable portion 3 thus causing the laminate constituting the punchable portion 3 itself to yield and, on the other hand, it allows to more easily cut the punchable portion 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)

Abstract

La présente invention concerne un dispositif d'ouverture (1) du type pouvant être fixé à un contenant multicouche (2) pour produits versables au niveau de sa partie perforable, ledit dispositif d'ouverture comprenant un collier (4) pouvant être accouplé à ladite partie perforable, et un élément tranchant (5) se déplaçant à l'intérieur dudit collier (4) d'une manière contrainte par des moyens de guidage hélicoïdaux (60) intercalés entre ledit élément tranchant (5) et ledit collier (4), ledit élément tranchant (5) comprenant au moins une première dent (6) présentant une section sensiblement triangulaire et pourvue d'au moins une partie extrémité (7) présentant un sommet (7a), pour perforer ladite au moins une partie perforable, ladite au moins une partie extrémité étant arrondie au moins vers ledit au moins un sommet, ladite dent étant pourvue d'au moins deux flancs (8, 9), d'au moins une face latérale (10), d'au moins un bord tranchant (11) défini par l'intersection de ladite face latérale (10) avec au moins un desdits flancs (8), ledit bord tranchant (11) étant raccordé sur ladite partie extrémité, à proximité dudit sommet (7a).
EP14828522.4A 2013-11-28 2014-11-28 Dispositif permettant d'ouvrir un contenant pour produits versables Active EP3074317B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000058A ITPG20130058A1 (it) 2013-11-28 2013-11-28 Dispositivo di apertura per un contenitore per prodotti versabili
PCT/IB2014/066421 WO2015079416A1 (fr) 2013-11-28 2014-11-28 Dispositif permettant d'ouvrir un contenant pour produits versables

Publications (2)

Publication Number Publication Date
EP3074317A1 true EP3074317A1 (fr) 2016-10-05
EP3074317B1 EP3074317B1 (fr) 2018-01-10

Family

ID=50001165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14828522.4A Active EP3074317B1 (fr) 2013-11-28 2014-11-28 Dispositif permettant d'ouvrir un contenant pour produits versables

Country Status (7)

Country Link
EP (1) EP3074317B1 (fr)
CN (1) CN105939938A (fr)
BR (1) BR112016011955A2 (fr)
IT (1) ITPG20130058A1 (fr)
MX (1) MX2016006837A (fr)
WO (1) WO2015079416A1 (fr)
ZA (1) ZA201603057B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2723500T3 (es) * 2016-06-23 2019-08-28 Tetra Laval Holdings & Finance Material de envase de lámina para producir envases sellados de productos alimenticios vertibles
IT201800010569A1 (it) * 2018-11-26 2020-05-26 Easy Plast S R L Dispositivo di apertura/chiusura per un contenitore per prodotti versabili
EP3901046B1 (fr) * 2020-04-24 2023-06-07 Tetra Laval Holdings & Finance S.A. Dispositif d'ouverture pour un emballage scellé et emballage scellé doté d'un dispositif d'ouverture

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989000136A1 (fr) * 1987-06-30 1989-01-12 Toppan Printing Co., Ltd Bec pour recipients de liquide
JPH0613068Y2 (ja) * 1989-02-13 1994-04-06 日本製紙株式会社 口栓付紙容器
DK1088764T3 (da) * 1999-10-01 2004-11-15 Tetra Laval Holdings & Finance Lukbar åbningsindretning til forseglede emballager af hældbare födevarer
ZA200507565B (en) * 2003-03-21 2007-03-28 Bericap Holding Gmbh Closing device for a container consisting of laminated paper or cardboard
KR100591716B1 (ko) * 2004-02-02 2006-06-22 조영국 용기 마개
DE102006016113B3 (de) * 2006-04-04 2007-08-23 Sig Technology Ag Wiederverschließbares Ausgießelement für Karton/Kunststoff-Verbundpackungen
RU2427512C2 (ru) * 2006-10-23 2011-08-27 Делтона Инновейшнз Аг Полуфабрикат для изготовления устройства для открытия
ATE498556T1 (de) * 2007-11-05 2011-03-15 Tetra Laval Holdings & Finance WIEDERVERSCHLIEßBARE ÖFFNUNGSVORRICHTUNG FÜR VERPACKUNGEN FÜR AUSGIEßBARE NAHRUNGSMITTELPRODUKTE
GB0907662D0 (en) * 2009-05-02 2009-06-10 Elopak Systems Improvements in or relating to pour spout fitments

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2015079416A1 *

Also Published As

Publication number Publication date
BR112016011955A2 (pt) 2017-08-08
ZA201603057B (en) 2017-07-26
MX2016006837A (es) 2016-12-14
WO2015079416A1 (fr) 2015-06-04
CN105939938A (zh) 2016-09-14
ITPG20130058A1 (it) 2015-05-29
EP3074317B1 (fr) 2018-01-10

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