WO2023227310A1 - Élément de fermeture permettant de réduire et de retenir des liquides résiduels - Google Patents

Élément de fermeture permettant de réduire et de retenir des liquides résiduels Download PDF

Info

Publication number
WO2023227310A1
WO2023227310A1 PCT/EP2023/060711 EP2023060711W WO2023227310A1 WO 2023227310 A1 WO2023227310 A1 WO 2023227310A1 EP 2023060711 W EP2023060711 W EP 2023060711W WO 2023227310 A1 WO2023227310 A1 WO 2023227310A1
Authority
WO
WIPO (PCT)
Prior art keywords
cap
closure
closure element
element according
structural elements
Prior art date
Application number
PCT/EP2023/060711
Other languages
German (de)
English (en)
Inventor
Christian KRAUTKRÄMER
Original Assignee
Bericap Holding Gmbh
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 Bericap Holding Gmbh filed Critical Bericap Holding Gmbh
Publication of WO2023227310A1 publication Critical patent/WO2023227310A1/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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3423—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
    • B65D41/3428—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt the tamper element being integrally connected to the closure by means of bridges
    • 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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/325—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings with integral internal sealing means
    • 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

Definitions

  • the present invention relates to a closure element for a liquid container, the closure element comprising a closure cap, the closure cap having a cap lid, the closure cap having a cap jacket which adjoins the cap lid on the circumference and extends cylindrically about a closure cap axis, the closure cap comprising a sealing ring, wherein the sealing ring is arranged on the inside of the cap lid, wherein the closure element comprises an anchor ring and a connecting element, wherein the connecting element connects the closure cap to the anchor ring in a tension-resistant manner, wherein the anchor ring is designed such that it can be brought into tension-resistant engagement with a container neck of a liquid container.
  • the present invention further relates to a combination of a container with a closure element of the type mentioned at the outset.
  • Closure elements of the type mentioned at the beginning are also referred to as tethered closures. This is because these can be brought into engagement with a container neck of a container, so that the closure cap always remains attached to the container neck, even when the closure cap is in an open position and liquid flows out of the container.
  • the container to be closed is a beverage container and this is intended so that a consumer can drink the contents of the beverage directly by placing his mouth on the neck of the container, it is important that the closure cap can be brought into an open position in which it disturbs the consumer as little as possible while drinking. However, it is also equally important to ensure that liquid residues that were still in the cap when the cap was opened do not flow out of the cap when drinking and thus potentially stain and soil the person drinking or their clothing.
  • an object of the present invention is to exclude or at least reduce the risk of liquid residues escaping from an opened, connected closure cap.
  • a closure element for a liquid container comprising a closure cap, the closure cap having a cap lid, the closure cap having a cap jacket which adjoins the cap lid on the circumference and extends cylindrically about a closure cap axis, the closure cap comprising a sealing ring , wherein the sealing ring is arranged on the inside of the cap lid, wherein the closure element comprises an anchor ring and a connecting element, wherein the connecting element connects the closure cap to the anchor ring in a tension-resistant manner, wherein the anchor ring is designed such that it can be brought into tension-resistant engagement with a container neck of a liquid container .
  • the cap cover has a structured surface at least in sections on its inside and radially on the inside of the sealing ring, the structured surface being designed such that the structured surface comprises a plurality of open recesses for receiving liquid.
  • the sealing ring is also known in specialist circles as a sealing olive or sealing lip.
  • the sealing ring is designed in such a way that it rests on the inside of a container neck and seals the container neck from the external environment when the closure element is applied to the container neck in a closed position.
  • the connecting element connects the closure cap to the anchor ring in such a tensile manner that the resulting connection only breaks from a tensile force of 12.5 Newton or more.
  • the cap cover is designed as a cover plate that extends essentially perpendicular to the closure cap axis.
  • the connecting element is a hinge element which is designed such that the closure cap can be pivoted relative to the anchor ring about a pivot axis which is essentially perpendicular to the closure cap axis.
  • the connecting element comprises at least one retaining strap and preferably two retaining straps.
  • the structured surface adjoins the sealing ring, wherein the structured surface preferably adjoins the sealing ring at every circumferential angular position.
  • liquid residues are mainly located in the internal transition area between the sealing ring and the cap lid. This is also due to the locally increased adhesion forces due to the sealing ring. In the central area of the cap lid, liquid residues are found much less often, since the adhesion forces acting solely on the inside surface of the cap lid are usually not sufficient to prevent the liquid from flowing back into the container if the container is in an upright position before opening is stored. Because the structured surface adjoins the sealing ring, not only the locally acting adhesion forces are further strengthened.
  • the structuring also means that the molecular forces acting in the circumferential direction within a liquid residue and holding the residue together can only develop weaker, so that a substantially continuous film cannot form along the transition region of the sealing ring and cap cover over a larger circumferential angle. This also ensures that the amount of liquid contained in a recess defined by the structured surface does not exceed a critical mass value, beyond which the adhesion forces would no longer be sufficient to compensate for the force of gravity acting on the amount of liquid.
  • the cap lid has a plurality of structural elements on the inside, the surfaces of the plurality of structural elements defining the plurality of open recesses.
  • a structural element is a plastic element with a clearly definable spatial extent such as height, length and width.
  • a clearly definable spatial extent such as height, length and width.
  • such structural elements have the advantage that they produce a clearly definable adhesion effect, which can then, for example, be distributed homogeneously along the transition area between the sealing ring and the cap cover.
  • the structural elements are at a smaller distance from the closure cap axis than the sealing ring.
  • the structural elements are formed in one piece with the cap cover and the sealing ring.
  • the structured surface is formed by the surfaces of the structural elements and the surface of a valley bottom of the cap cover which is arranged between two adjacent structural elements and is formed between a respective adjacent pair of structural elements.
  • opposite side surfaces of two adjacent structural elements form the flanks of a valley, which is completed by the valley floor.
  • the structural elements are designed and arranged such that at least a first pair of adjacent structural elements laterally delimit a first capillary, the first capillary being designed to be open in a spatial direction aligned parallel to the closure cap axis.
  • a capillary in the sense of the present application is to be understood as meaning a recess such as a gap or cavity, which is dimensioned in such a way that the capillary force, which would act on the water contained in the capillary, would also affect the force of gravity, which would also act on the water contained in the capillary water contained in the capillary would act, compensated so that the water does not flow out of the capillary towards the ground.
  • each of the plurality of open recesses forms a capillary.
  • the design of the recesses as capillaries ensures that in the majority of all cases that occur when using the closure element, the adhesion forces compensate for the force of gravity that acts on liquid residues on the cap lid.
  • the first pair of structural elements is designed and arranged such that a capillary force acts on a quantity of cow's milk that enters the first capillary during use of the closure device, which essentially compensates for the gravity acting on the quantity of cow's milk when the inside of the Cap lid is aligned towards the ground.
  • two adjacent structural elements each have a radian distance in the circumferential direction of 2 degrees to 10 degrees. It has been found that appropriate radian distances can create sufficient adhesion force to reduce the risk of liquid residues dripping out of an open cap.
  • two adjacent structural elements each have a radian distance in the circumferential direction of 4 degrees to 8 degrees. It has been found that appropriate radian distances can create sufficient adhesion force to greatly reduce the risk of liquid residues dripping out of an open cap.
  • two adjacent structural elements are at a maximum distance from each other in the circumferential direction of 2 mm. In this way, recesses in the sense of the present invention are formed between the structural elements, which are accompanied by a sufficient adhesion effect in order to reduce the risk of dripping of liquid residues. At the same time, the amount of material required to attach the structural elements is as low as possible. In one embodiment of the closure element according to the invention, two adjacent structural elements are at a maximum distance from one another in the circumferential direction of 1.5 mm. This further strengthens the adhesion effect, so that the risk of dripping can be further reduced.
  • two adjacent structural elements are at a maximum distance from one another in the circumferential direction. This ensures that in the majority of cases that occur in everyday life, liquid residues do not drip off.
  • the plurality of structural elements are elongated ribs.
  • Such ribs are very suitable for forming recesses in the form of valleys.
  • Such ribs can also be produced very easily using the known injection molding processes for plastic closures
  • the ribs extend essentially radially. This prevents a coherent liquid film from forming on the cap lid, which remains as liquid residue in the closure lid when the closure lid is brought into an open position. Due to the radially extending ribs, the liquid molecules can no longer interact with each other as strongly over a greater distance in order to form a coherent film, since the planar surface required for this is repeatedly interrupted by the axially projecting ribs. In other words, ring-shaped film formation in particular is prevented by the ribs, since no circumferential, undisturbed contact between the liquid molecules is possible due to the interruptions caused by the ribs.
  • the ribs adjoin both a surface section of the cap cover lying perpendicular to the closure cap axis and an inner surface of the sealing ring arranged cylindrically around the closure cap axis. This advantageously hinders the formation of a film of liquid residues in the transition area between the sealing ring and the cap cover.
  • the ribs extend in the form of a half round arch between the surface section of the cap cover lying perpendicular to the closure cap axis and the cylindrical around the closure inner surface of the sealing ring arranged on the end cap axis.
  • Ribs designed in this way can be removed from the mold particularly easily during the manufacturing process and require minimal material expenditure - with maximum adhesion effect and simultaneous prevention of film formation.
  • the half round arch can in particular have a radius of curvature, the center of curvature of which is arranged radially on the inside of the cap jacket.
  • the ribs each have a radial extent of 2 to 20 percent of the diameter of the cap cover. It has been shown that film formation can be reduced by appropriately designed ribs in such a way that the risk of the occurrence of liquid residues with a critical mass required for dripping can be reduced.
  • the ribs each have a radial extent of 5 to 15 percent of the diameter of the cap cover.
  • the ribs each have a radial extent of 8 to 12 percent of the diameter of the cap cover. This can ensure that film formation practically does not occur.
  • the ribs each have a radial extent of 2 mm to 8 mm. In one embodiment of the closure element according to the invention, the ribs each have a radial extent of 2.5 mm to 6 mm. In one embodiment of the closure element according to the invention, the ribs each have a radial extent of 3 mm to 4 mm.
  • the ribs each have an extension in the circumferential direction of 0.2 mm to 1 mm. In one embodiment of the closure element according to the invention, the ribs each have an extension in the circumferential direction of 0.4 mm to 0.8 mm.
  • the ribs each have a maximum axial extent of 1.5 mm to 4 mm. In one embodiment of the closure element according to the invention, the ribs each have a maximum axial extent of 2 mm to 3 mm. It has been shown that ribs that are designed according to the previously described parameter ranges both advantageously prevent or at least reduce film formation on the cap lid and also enable the formation of a plurality of recesses, the recesses being accompanied by adhesion forces, which are possible in retain liquid residues contained in the recesses and thus prevent these residues from dripping.
  • the closure element is made of plastic. In one embodiment of the closure element according to the invention, the closure element is produced by an injection molding process.
  • the object on which the invention is based is also achieved by a combination of a container with a closure element according to one of the previously described embodiments.
  • the container can also be made of plastic.
  • the container has a container neck, wherein the anchor ring is in engagement with the container neck in such a way that the anchor ring is connected to the container neck in a tension-resistant manner, so that the closure cap is connected to the container neck via the connecting element and the anchor ring when the cap is in an open position.
  • the container is a beverage container, in particular a beverage container for milk, milk-containing drinks or fruit juices. It has been shown that these types of liquid in particular tend to form larger liquid residues in a closure cap, so that the risk of dripping is particularly high with these types of drinks if the closure elements are not designed according to one of the embodiments described here.
  • the anchor ring is in engagement with the container neck in such a way that the resulting tensile connection only breaks from a tensile force of 12.5 Newton or more.
  • FIG. 2 a side sectional view of the embodiment from FIG. 1 according to the second sectional plane 101 shown in FIG. 1,
  • FIG. 3 a detailed view of the sectional view from FIG. 2 of the transition area between the sealing ring and the cap cover according to the first detailed view area 102 shown in FIG. 2,
  • Fig. 5 a detailed view of the top view from Fig. 1 of the transition area between the sealing ring and the cap cover according to the second detailed view area 103 shown in Fig. 1.
  • closure cap 2 used there is a screw cap.
  • the closure cap 2 has an internal thread 12 which can be brought into engagement with a corresponding external thread of a container neck in order to close the container neck.
  • the sealing ring 5 which extends axially inwards from the cap cover 3, and in particular the sealing projection 11 arranged thereon, rests on an inside of the container neck and thus brings about a liquid-tight closure when the closure element 1 is attached to a container neck.
  • the liquid-tight closure is further reinforced by the outer sealing element 13, which lies further outward radially to the sealing ring 5 and which is annular and rests against an outside of the container neck in the closed position of the closure element 1.
  • the container neck is positioned between sealing ring 5 (inside) and outer sealing element 13 (outside) to provide a liquid-tight closure.
  • the container for example a PET beverage bottle with a capacity of 500 ml, often moves from an upright position to a lying position or even rotated to an upside down position. It is then crucial that the liquid contents of the container cannot escape from the container neck.
  • the ribs 8 are - as can be seen in Figures 1 and 5 - arranged so closely to one another that adhesion forces act on the liquid residues from the two flanks of the adjacent ribs 8 and the valley floor in between, which counteracts the drainage of these residues, even if the closure cap 2 stored in an upright position.
  • the risk of drops forming and falling off the closure cap 2 is therefore low if, for example, a consumer places a beverage container equipped with the closure element or its container neck against their mouth for drinking.
  • the ribs 8 are designed as half round arches and attach both laterally to the inside of the sealing ring 5 and axially to the cap cover 3.
  • the cap cover 3, the ribs 8 and the sealing ring 5 are formed in one piece.
  • a column-shaped recess 9 extends between each adjacent pair of ribs 8 - as can be seen in FIG. 4 - and can also be referred to as a capillary 9 due to its liquid-retaining function.
  • the ribs 8 and the column-shaped recesses 9 between them are shown again in a top view from below. It can also be seen here that the recesses 9 narrow from the sealing ring 5 in the direction of the closure cap axis 50. This is due to the extension of the ribs 8 in the circumferential direction, which is constant when viewed in the radial direction.
  • the anchor ring 6 is designed as a flexible band. This flexible band has a foldable inner band section 10 which can be brought into engagement with a pilfer-proof ring of a container neck in order to fix the anchor ring 6 relative to the container neck.
  • the closure cap 2 Via a connecting element (not shown in detail) which connects the anchor ring 6 to the closure cap 2, the closure cap 2 remains connected to the anchor ring 6 even when the closure cap 2 is unscrewed from the container neck in order to release the contents of the liquid container .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

La présente invention concerne un élément de fermeture pour un récipient destiné à des liquides.
PCT/EP2023/060711 2022-05-23 2023-04-25 Élément de fermeture permettant de réduire et de retenir des liquides résiduels WO2023227310A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022112981.0 2022-05-23
DE102022112981.0A DE102022112981A1 (de) 2022-05-23 2022-05-23 Verschlusselement zum Verringern und Festhalten von Flüssigkeitsrückständen

Publications (1)

Publication Number Publication Date
WO2023227310A1 true WO2023227310A1 (fr) 2023-11-30

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Application Number Title Priority Date Filing Date
PCT/EP2023/060711 WO2023227310A1 (fr) 2022-05-23 2023-04-25 Élément de fermeture permettant de réduire et de retenir des liquides résiduels

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Country Link
DE (1) DE102022112981A1 (fr)
WO (1) WO2023227310A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0204425A2 (fr) * 1985-06-04 1986-12-10 Johnsen & Jorgensen (Plastics) Limited Fermeture pour récipients (étanchéité cellulaire)
WO2020240518A1 (fr) * 2019-05-31 2020-12-03 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Capuchon pour un récipient et combinaison d'un capuchon et d'un col de récipient
WO2021141079A1 (fr) * 2020-01-07 2021-07-15 日本クロージャー株式会社 Couvercle de récipient en résine synthétique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4203238A1 (de) 1992-02-05 1993-08-12 Mouldtec Pvg Ag Verschlusskappe aus kunststoff fuer insbesondere pet-flaschen
DE29922844U1 (de) 1999-12-27 2000-03-23 Bergi Plast Gmbh Kunststofftec Schraubverschluß
DE102008014952A1 (de) 2008-03-19 2009-09-24 Z-Werkzeugbau-Gmbh Schraubkappe
DE102019112259B3 (de) 2019-05-10 2020-04-09 CCT - SYS GmbH Schraubverschluss aus Kunststoff für Flaschen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0204425A2 (fr) * 1985-06-04 1986-12-10 Johnsen & Jorgensen (Plastics) Limited Fermeture pour récipients (étanchéité cellulaire)
WO2020240518A1 (fr) * 2019-05-31 2020-12-03 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Capuchon pour un récipient et combinaison d'un capuchon et d'un col de récipient
WO2021141079A1 (fr) * 2020-01-07 2021-07-15 日本クロージャー株式会社 Couvercle de récipient en résine synthétique

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Publication number Publication date
DE102022112981A1 (de) 2023-11-23

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