EP3715273A1 - Dispositif d'ouverture pour un emballage contenant un produit versable - Google Patents

Dispositif d'ouverture pour un emballage contenant un produit versable Download PDF

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Publication number
EP3715273A1
EP3715273A1 EP19165231.2A EP19165231A EP3715273A1 EP 3715273 A1 EP3715273 A1 EP 3715273A1 EP 19165231 A EP19165231 A EP 19165231A EP 3715273 A1 EP3715273 A1 EP 3715273A1
Authority
EP
European Patent Office
Prior art keywords
opening device
cap
connection rib
package
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19165231.2A
Other languages
German (de)
English (en)
Inventor
Angelo Sorbara
Pietro Martini
Rocco De Paola
Giulio Bertani
Franco Cani
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
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 Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Priority to EP19165231.2A priority Critical patent/EP3715273A1/fr
Publication of EP3715273A1 publication Critical patent/EP3715273A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D55/00—Accessories for container closures not otherwise provided for
    • B65D55/16—Devices preventing loss of removable closure members
    • 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 an opening device, in particular to a reclosable opening device, configured to be applied to a package containing a pourable product, preferably a pourable food product.
  • pourable food products such as fruit juice, UHT (ultra-high temperature-treated) milk, wine, tomato sauce, etc.
  • UHT ultra-high temperature-treated milk
  • wine tomato sauce
  • etc. are sold in packages made of sterilized packaging material.
  • a typical example is the parallelepiped-shaped package for pourable food products known as Tetra Brik Aseptic (registered trademark), which is made by folding and sealing a laminated sheet of packaging material.
  • the packaging material has a multilayer structure substantially comprising a base layer for stiffness and strength, which may be made of fibrous material, e.g. paper or mineral-filled polypropylene material, and a number of lamination layers made of heat-seal plastic material, e.g. polyethylene films, covering both sides of the base layer.
  • a base layer for stiffness and strength which may be made of fibrous material, e.g. paper or mineral-filled polypropylene material, and a number of lamination layers made of heat-seal plastic material, e.g. polyethylene films, covering both sides of the base layer.
  • the packaging material also comprises a layer of gas-barrier material, e.g. aluminum foil or ethyl vinyl alcohol (EVOH) film, which is superimposed on a layer of heat-seal plastic material, and is in turn covered with another layer of heat-seal plastic material.
  • gas-barrier material e.g. aluminum foil or ethyl vinyl alcohol (EVOH) film
  • EVOH ethyl vinyl alcohol
  • Packages of this sort are normally produced on fully automatic packaging machines, in which a continuous tube is formed from the sheet of packaging material.
  • the sheet of packaging material is sterilized in the packaging machine by applying a chemical sterilization agent, which is then removed after sterilization is completed.
  • the sheet of packaging material is maintained in a closed, sterile environment and is folded and sealed longitudinally to form the tube.
  • the tube is filled from above, by means of a pipe, with the pourable food product and is formed, sealed and subsequently cut along equally spaced transversal cross sections.
  • Pillow packs are obtained thereby, which have a longitudinal sealing band, a top transversal sealing band and a bottom transversal sealing band, and which are then folded mechanically to form respective finished substantially parallelepiped-shaped packages.
  • the packaging material may be cut into blanks, which are formed into packages on forming spindles, and the resulting packages are filled with the food product and sealed.
  • a package is the so-called "gable top” package commonly known by the trade name Tetra Rex (registered trademark).
  • Opening devices of such type generally comprise:
  • the frame is fitted over a so-called prelaminated hole, i.e. a hole formed through the base layer only and covered, by means of a lamination process, by the other lamination layers of the packaging material, including the layer of gas-barrier material.
  • the frame is fitted, typically glued, onto the pierceable portion of the prelaminated hole, which is made of such lamination layers.
  • the pierceable portion may be defined by a patch attached to the packaging material to close a hole formed, in this case, through the full thickness of the packaging material.
  • Threaded opening devices are known, in which the frame typically comprises an externally threaded, substantially cylindrical-shaped collar, whereas the cap comprises an internal thread and is initially screwed to the collar. Furthermore, the cap is normally injection-molded integrally with a relative tamper-evidence ring, which is coaxially connected to the cap itself by means of a plurality of breakable bridges and which is configured to remain fitted to the collar once the bridges are broken and the cap is unscrewed.
  • the opening device comprises a pull-off tongue coupled to the pierceable portion and configured to be torn by the user, once the cap has been unscrewed from the frame.
  • the known opening devices comprise a substantially tubular cutting member screwed inside the collar and having an edge with a number of substantially triangular end teeth, which cooperate with, and partly detach, the pierceable portion from the relative wall, preferably with the exception of a small-angle portion, so as to avoid the torn pierceable portion to fall into the inside of the package after cutting.
  • the cutting member is activated by the cap by means of a one-way ratchet-type transmission means, operated during disengagement of the cap from the collar of the frame.
  • the cutting member is movable along a spiral path with respect to the frame, from a raised rest position, in which the end teeth face the pierceable portion, into successive lowered cutting positions, in which the end teeth interact with the pierceable portion, thereby cutting the pierceable portion.
  • number 1 indicates as a whole a package made of a multilayer sheet of packaging material 2, adapted to contain a pourable product, and having a wall, in particular a top wall 4, onto which an opening device 3, preferably made of plastic material, is fitted.
  • package 1 is adapted to contain a pourable food product, such as milk, water, fruit juice or the like.
  • opening device 3 is fitted to an opening area of package 1 by conventional fixing means, such as adhesive substances, e.g. glue, or by means of welding systems, e.g. laser welding or microflame welding.
  • fixing means such as adhesive substances, e.g. glue
  • welding systems e.g. laser welding or microflame welding.
  • packaging material 2 comprises a base layer 5 for providing stiffness and strength, which may be made of fibrous material, e.g. paper or mineral-filled polypropylene material, and a cover layer arrangement 6.
  • base layer 5 for providing stiffness and strength, which may be made of fibrous material, e.g. paper or mineral-filled polypropylene material, and a cover layer arrangement 6.
  • cover layer arrangement 6 comprises a first covering layer 6a and a second covering layer 6b, both made of heat-seal plastic material, e.g. polyethylene film, and covering both sides of base layer 5.
  • first covering layer 6a and second covering layer 6b both made of heat-seal plastic material, e.g. polyethylene film, and covering both sides of base layer 5.
  • Packaging material 2 comprises, at top wall 4 of package 1, a pierceable portion 7 which is covered externally, in use, by opening device 3 and which is configured to be detached, at least partially, from top wall 4 in order to allow the pourable product to exit package 1.
  • pierceable portion 7 defines the opening area to which opening device 3 is fitted.
  • opening area may be a through hole made in the packaging material 2, in particular in the portion of packaging material 2 forming top wall 4.
  • cover layer arrangement 6 also comprises a barrier layer 8 made of gas-barrier material, e.g. aluminum foil or ethyl vinyl alcohol (EVOH) film, which is superimposed on the second covering layer 6b and is in turn covered with a third covering layer 6c of cover layer arrangement 6, made of heat-seal plastic material.
  • gas-barrier material e.g. aluminum foil or ethyl vinyl alcohol (EVOH) film
  • third covering layer 6c forms the inner face of package 1 eventually containing the pourable food product.
  • first covering layer 6a, second covering layer 6b, barrier layer 8 and third covering layer 6c define lamination layers applied, by a lamination process, to base layer 5 when producing packaging material 2 in the form of a continuous sheet, before cutting and folding it to form package 1.
  • Pierceable portion 7 is defined by a through hole formed only through base layer 5 and covered by first covering layer 6a, second covering layer 6b, barrier layer 8 and third covering layer 6c.
  • pierceable portion 7 is made of the above-mentioned lamination layers and closes the through hole formed in base layer 5.
  • pierceable portion 7 is an integral part of cover layer arrangement 6.
  • pierceable portion 7 may be made of only one or more of first covering layer 6a, second covering layer 6b, barrier layer 8 and third covering layer 6c.
  • pierceable portion 7 may be made solely of barrier layer 8.
  • pierceable portion 7 may be defined by a patch attached to packaging material 2 to cover a hole formed, in this case, through the full thickness of packaging material 2.
  • Pierceable portion 7 has an axis A, preferably orthogonal relative to top wall 4, in particular vertical when package 1 stands on a bottom wall (not shown and substantially parallel to top wall 4).
  • pierceable portion 7 has a substantially circular shape concentric to axis A.
  • opening device 3 comprises:
  • opening 11a is arranged coaxially to axis A and cap 12 is configured to engage frame 10 coaxially to axis A to close passage 11.
  • frame 10 comprises a base plate 13, preferably flat, configured to be attached to package 1 substantially parallel to top wall 4 and surrounding pierceable portion 7, and a cylindrical collar 14 projecting transversally, in particular orthogonally, from base plate 13, and having a longitudinal axis B coaxial, in use, to axis A.
  • collar 14 coaxially defines passage 11.
  • opening 11a is arranged coaxially also to axis B.
  • Cap 12 comprises a substantially flat circular portion 15 and a cylindrical portion 16, which projects from flat portion 15 along a longitudinal axis C of cap 12 itself and which is configured to coaxially engage collar 14 in order to close passage 11.
  • collar 14 is provided with an outer thread 17 extending onto an external lateral surface 18 of collar 14 itself, and cap 12 is provided with an inner thread 19 extending onto an internal lateral surface 20 of cylindrical portion 16.
  • outer thread 17 and inner thread 19 are configured to mutually engage so as to determine, in use and under the action of the user, unscrewing and screwing of cap 12 relative to frame 10, and therefore collar 14, thereby causing opening and closing of passage 11.
  • Opening device 3 further comprises tamper-evidence means, in particular a tamper-evidence band 21, preferably formed integrally with cap 12, for example injection-molded together with cap 12, and initially connected coaxially to a lower axial edge 26 of cap 12 at least by means of a number of breakable connecting bridges.
  • tamper-evidence means in particular a tamper-evidence band 21, preferably formed integrally with cap 12, for example injection-molded together with cap 12, and initially connected coaxially to a lower axial edge 26 of cap 12 at least by means of a number of breakable connecting bridges.
  • cap 12 is fitted initially to frame 10 in a closed position, in which cap 12 is screwed completely onto collar 14, with edge 26 and tamper-evidence band 21 still connected to one another.
  • tamper-evidence band 21 is arranged coaxially around collar 14.
  • the axial distance of tamper-evidence band 21 from opening 11a is greater than the axial distance of outer thread 17 from opening 11a.
  • tamper-evidence band 21 is arranged beneath outer thread 17 of collar 14.
  • cap 12 is moveable between:
  • the connecting bridges break, due to the torque applied thereto by the user, thereby at least partially unconstraining cap 12 from tamper-evidence band 21 and permitting the unscrewing of cap 12 off collar 14.
  • opening device 3 further comprises a known tubular cutting member 24 which engages collar 14 axially and in a movable manner and is activated by cap 12 to interact with pierceable portion 7 to open package 1.
  • cutting member 24 is provided with cutting means (known per se and not described in detail) and is connected to collar 14 by means of a guiding arrangement such as thread elements or cam elements (also known per se and not described in detail) and is configured to move between a raised resting position and a lowered opening position, during first disengagement of cap 12 from collar 14.
  • a guiding arrangement such as thread elements or cam elements (also known per se and not described in detail) and is configured to move between a raised resting position and a lowered opening position, during first disengagement of cap 12 from collar 14.
  • cutting member 24 in the raised resting position, cutting member 24 is entirely housed within collar 14, with the cutting means facing pierceable portion 7; in the lowered position, cutting member 24 projects axially from collar 14 to cut, penetrate and tear off pierceable portion 7 in a known manner, thereby allowing a fluid connection between the inside of package 1 and passage 11 (and also opening 11a).
  • Displacement of cutting member 24 is controlled via a one-way angular transmission device 25 carried by cap 12, in particular fitted to flat portion 15, in a manner known and not described in detail.
  • opening device 3 comprises a pull-off tongue coupled to pierceable portion 7 and configured to be pulled by the user, once cap 12 has been unscrewed from collar 14, in order to manually tear off pierceable portion 7.
  • cap 12 is tethered to frame 10 by means of tamper-evidence band 21.
  • tamper-evidence band 21 is so configured as to allow cap 12 to be unscrewed from collar 14 and to prevent cap 12 from being detached (and in particular disposed of separately) from frame 10, i.e. from package 1.
  • tamper-evidence band 21 comprises a first unbreakable connection rib 22 and a second unbreakable connection rib 23, where first connection rib 22 is fitted to frame 10 and second connection rib 23 is fitted to cap 12.
  • first connection rib 22 and second connection rib 23 are arranged at respective end portions of tamper-evidence band 21.
  • tamper-evidence band 21 comprises a connection portion 21a connecting first connection rib 22 and second connection rib 23 to one another.
  • connection portion 21a has a length such as to allow an almost complete winding of tamper-evidence band 21 coaxially around collar 14, thereby permitting a complete unscrewing of cap 12 off collar 14.
  • first connection rib 22 and second connection rib 23 are arranged in respective circumferential positions close to one another, when cap 12 is in its closed position.
  • first connection rib 22 and second connection rib 23 are formed integrally with tamper-evidence band 21.
  • tamper-evidence band 21 is formed, for example by injection-molding, integrally with cap 12. Subsequently, the assembly defined by cap 12 and tamper-evidence band 21, which are therefore connected to one other by the above-mentioned breakable connecting bridges and by the unbreakable second connection rib 23, is fitted to frame 10.
  • cap 12 is fitted, or connected, to tamper-evidence band 21 only by means of second connection rib 23.
  • tamper-evidence band 21 is fitted to frame 10 only by means of first connection rib 22.
  • second connection rib 23 is formed integrally with cap 12 and protrudes axially from edge 26 of cylindrical portion 16.
  • first connection rib 22 is fitted to base plate 13 of frame 10.
  • base plate 13 comprises a slit 27 configured to be engaged by first connection rib 22.
  • first connection rib 22 is, once cap 12 has been assembled to frame 10, rigidly coupled to slit 27. Hence, first connection rib 22 is angularly fixed with respect to axis B.
  • first connection rib 22 defines an anchor point for tamper-evidence band 21 relatively to frame 10, by means of which cap 12 is tethered to frame 10.
  • tamper-evidence band 21 allows and follows the rotation, in particular the counterclockwise rotation, of cap 12 about axis B, during unscrewing of cap 12 off collar 14.
  • tamper-evidence band 21 also allows the clockwise rotation of cap 12 about axis B to screw cap 12 onto collar 14.
  • tamper-evidence band 21 tethers cap 12 to frame 10 without interfering with the normal operation of opening device 3, i.e. with the normal unscrewing and screwing of cap 12 off/onto collar 14.
  • slit 27 is obtained through base plate 13 peripherally with respect to collar 14.
  • slit 27 is obtained substantially at the same radial distance from axis B as edge 26 of cap 12, when cap 12 is in its closed position.
  • slit 27 defines a through hole 28 passing through base plate 13 and comprising a first stretch 28a, opening towards top wall 4, and a second stretch 28b, extending from first stretch 28a and opening towards the opposite side relative to top wall 4.
  • first stretch 28a has a transversal extension greater than the transversal extension of second stretch 28b.
  • first connection rib 22 is engaged into slit 27, entering through second stretch 28b.
  • first connection rib 22 passes first through second stretch 28b and then through first stretch 28a.
  • first connection rib 22 comprises a meltable portion 22a configured to pass through the entire through hole 28 during assembling and configured to be melted, after the coupling is complete, and formed (compressed) so as to have a transversal extension greater than the transversal extension of second stretch 28b.
  • first connection rib 22 is rigidly coupled to base plate 13, and cap 12 is firmly tethered to frame 10.
  • first connection rib 22 is coupled to slit 27 by means of a snap-in coupling.
  • opening device 3 The operation of opening device 3 is described hereinafter with reference to Figure 1 and 2 and starting from a condition in which cap 12 is still screwed on frame 10.
  • cap 12 is tethered to frame 10 by means of tamper-evidence band 21, as described above.
  • cap 12 is firmly tethered to frame 10 throughout the use of package 1 and after its disposal.
  • opening device 3 does not require cumbersome modifications to the design of existing opening devices not provided with tamper-evidence band 21 according to the invention.
  • opening device 3 maintains at least the same versatility and ease-to-use of the opening devices known in the art and not provided with tamper-evidence band 21.
  • frame 10 of opening device 3 could be directly molded, for example by injection molding, at the opening area of package 1.
  • a predetermined amount of molten plastic material is injected onto, and through, the pierceable portion 7 by means of a known molding device.
  • the plastic material is forced to pierce the pierceable portion 7 from a first side thereof, due to the injection pressure and the geometry of the molding device used to form the opening device 3, so as to pass through the pierceable portion 7, and protrude from a second side of the pierceable portion 7, opposite to the first side.
  • the lamination layers forming the pierceable portion 7 and closing the hole of the base layer 5 are first pierced through and then resealed by the plastic material forming frame 10.
  • the finished package 1 is defined by the assembly comprising the filled, folded and sealed package 1 and the frame 10 which has been injection molded on the top wall 4 of package 1, in particular at the opening area thereof.
  • frame 10 can be regarded as part of both package 1 and opening device 3. Therefore, in this case, tamper-evidence band 21 is fitted to cap 12 and to package 1, that is, it secures cap 12 to package 1, as frame 10 is part of package 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
EP19165231.2A 2019-03-26 2019-03-26 Dispositif d'ouverture pour un emballage contenant un produit versable Withdrawn EP3715273A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19165231.2A EP3715273A1 (fr) 2019-03-26 2019-03-26 Dispositif d'ouverture pour un emballage contenant un produit versable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19165231.2A EP3715273A1 (fr) 2019-03-26 2019-03-26 Dispositif d'ouverture pour un emballage contenant un produit versable

Publications (1)

Publication Number Publication Date
EP3715273A1 true EP3715273A1 (fr) 2020-09-30

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EP19165231.2A Withdrawn EP3715273A1 (fr) 2019-03-26 2019-03-26 Dispositif d'ouverture pour un emballage contenant un produit versable

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022194577A1 (fr) * 2021-03-16 2022-09-22 Bericap Holding Gmbh Dispositif de fermeture

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2430775A1 (de) * 1973-07-02 1975-01-23 Somepla Sa Unverlierbare flaschenkappe mit beschaedigungssicherem gewinde
EP1262412A1 (fr) * 2001-05-29 2002-12-04 Tetra Laval Holdings & Finance S.A. Ouverture refermable destinée aux emballages de produits alimentaires pouvant être versés
EP1961669A2 (fr) * 2007-02-20 2008-08-27 Ronald H. Berman Réceptacle doté d'un bec verseur et capuchon vissé doté d'une bande de garantie
US20150251827A1 (en) * 2014-03-10 2015-09-10 Phillip John Campbell Closure with spring loaded tether docking

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2430775A1 (de) * 1973-07-02 1975-01-23 Somepla Sa Unverlierbare flaschenkappe mit beschaedigungssicherem gewinde
EP1262412A1 (fr) * 2001-05-29 2002-12-04 Tetra Laval Holdings & Finance S.A. Ouverture refermable destinée aux emballages de produits alimentaires pouvant être versés
EP1961669A2 (fr) * 2007-02-20 2008-08-27 Ronald H. Berman Réceptacle doté d'un bec verseur et capuchon vissé doté d'une bande de garantie
US20150251827A1 (en) * 2014-03-10 2015-09-10 Phillip John Campbell Closure with spring loaded tether docking

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022194577A1 (fr) * 2021-03-16 2022-09-22 Bericap Holding Gmbh Dispositif de fermeture

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