EP3710373A1 - Élément de fermeture en matière plastique pourvu d'une membrane détachable - Google Patents

Élément de fermeture en matière plastique pourvu d'une membrane détachable

Info

Publication number
EP3710373A1
EP3710373A1 EP18804551.2A EP18804551A EP3710373A1 EP 3710373 A1 EP3710373 A1 EP 3710373A1 EP 18804551 A EP18804551 A EP 18804551A EP 3710373 A1 EP3710373 A1 EP 3710373A1
Authority
EP
European Patent Office
Prior art keywords
membrane
closure part
plastic closure
tear line
closure
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Withdrawn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
EP18804551.2A
Other languages
German (de)
English (en)
Inventor
Günter Krautkrämer
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.)
Bericap Holding GmbH
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 EP3710373A1 publication Critical patent/EP3710373A1/fr
Withdrawn legal-status Critical Current

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
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/10—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having frangible closures
    • B65D47/103—Membranes with a tearing element
    • 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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/002—Closures to be pierced by an extracting-device for the contents and fixed on the container by separate retaining means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • 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
    • B65D41/46—Snap-on caps or cap-like covers
    • 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
    • B65D41/50—Caps or cap-like covers with membranes, e.g. arranged to be pierced
    • 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
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/10—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having frangible closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D3/00—Apparatus or devices for controlling flow of liquids under gravity from storage containers for dispensing purposes
    • B67D3/0029—Apparatus or devices for controlling flow of liquids under gravity from storage containers for dispensing purposes provided with holders for bottles or similar containers
    • B67D3/0032—Apparatus or devices for controlling flow of liquids under gravity from storage containers for dispensing purposes provided with holders for bottles or similar containers the bottle or container being held upside down and provided with a closure, e.g. a cap, adapted to cooperate with a feed tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D3/00—Apparatus or devices for controlling flow of liquids under gravity from storage containers for dispensing purposes
    • B67D3/0058—Details
    • B67D3/0061—Details of liquid containers, e.g. filling, emptying, closing or opening means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • B29C2045/0027—Gate or gate mark locations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0009—Cutting out
    • B29C2793/0018—Cutting out for making a hole
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0054—Shaping techniques involving a cutting or machining operation partially cutting through the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
    • 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
    • B65D2231/00—Means for facilitating the complete expelling of the contents
    • B65D2231/02—Precut holes or weakened zones
    • B65D2231/022—Precut holes or weakened zones for permitting the insertion of a tubular contents-removing device, e.g. a drinking straw
    • 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
    • B65D2547/00—Closures with filling and discharging, or with discharging, devices
    • B65D2547/04—Closures with discharging devices other than pumps
    • B65D2547/06—Closures with discharging devices other than pumps with pouring spouts ot tubes; with discharge nozzles or passages

Definitions

  • the present invention relates to a plastic closure part which can be fastened to a container or to a further closure part to be fastened to the container, having a tubular extraction nozzle whose cross-section is closed by a membrane which extends over a contact angle of at least 180 ° along its outer edge Has a tear line.
  • closure members are known in the art from numerous closure types. Such a closure member is attached directly or indirectly to the edge of a container opening, such as a bottle or canister neck, optionally together with other closure elements, in a manner that will not be released from the container opening without visible damage or alteration of any parts of the closure can, even if then a lid or a screw cap, which surrounds the closure member with the sampling nozzle, is removed from the closure, the opening cross-section of the sampling nozzle, which may be configured for example as pouring spout, still closed by the membrane, which thus as Guarantee element for the unadulterated contents of the container is used.
  • the membrane along the tear line which may be wholly or only partially circumferential, separated from the sampling nozzle and depending on the type of closure either from outside to inside pierced or pushed aside, or it is a handle ring , a grip tab or other actuator that is connected to the membrane, pulled out of the sampling neck.
  • closure member according to the invention the essential element of the invention consists of the opening cross-section closing membrane may form part of a closure, for its attachment to a container neck more part are required, or is still to be provided with an additional cap or the like, or it may also include the necessary parts for attachment, and in particular alone form a complete closure.
  • membrane is not limited to a disk-like or film-like element, but includes all an opening cross-section closing elements, although in one piece Are connected to the sampling nozzle, however, which are completely or partially separated by an at least partially circumferential tear line of the cross-section defining sampling nozzle, Accordingly, the sampling nozzle can take many forms and z. B consist of a short pipe section, but also of a plate, of which an inner part forms the separable membrane whose surface defines the maximum opening cross section at the same time.
  • the terms “up”, “down”, or axially “upwards” or axially “downwards” refer to an orientation of the closure member as it is when the container is upright with the container opening at the top and the closure, which usually either has a screw thread or is designed as a bouncing or Einprell-, screwed onto the neck of the container or bounced or inserted into an opening, in any case is sealed at the edge of a container opening fixed.
  • closure member in the present description is described mainly in the variant as a closure for a large container, but is not limited thereto.
  • Large containers in the context of the present invention typically have a volume between 5 and 50 l, usually between 10 and 25 l and are often used for drinking water.
  • the membrane is rupturable along the tear line, for example by inserting the leading end of a withdrawal pintle into the withdrawal stub and pushing it axially against the membrane, so that the material of the membrane ruptures along the tear line. Since the tear line is preferably not completely circumferential in this case, the membrane remains connected along an unattenuated or less weakened portion of the defined by the tear line perimeter with the sampling nozzle, so that the membrane is pushed aside only to the inside and folded and the opening cross-section of the Essentially frees sampling outlet.
  • a large container is usually placed upside down, so that the closure (also referred to as cap) is located at the bottom, and it is a removal pin or a removal tube inserted into the withdrawal socket of the then lying down plastic closure, wherein the sampling tube which hits the cross section of the sampling nozzle closing membrane.
  • the closure also referred to as cap
  • the sampling tube which hits the cross section of the sampling nozzle closing membrane.
  • the extraction plug is essentially a pipe which, in use, projects through the sampling nozzle and into the container interior at an inner end, while an outer portion of the extraction nozzle can be provided with a removal valve.
  • a removal valve In such large containers is usually drinking water, which can be removed or tapped under the influence of gravity by means of the extraction pin from the overhead container.
  • the present invention extends to all plastic closure parts with a sampling nozzle, the opening cross-section is closed by a first to be opened for use membrane.
  • closures are used with a sealed membrane under but also for oil canisters and other containers for technical or chemical liquids such as paints and the like.
  • the injection-molded plastic closure part can be designed as a separate attachment or attachment for a container opening, a container neck or else in the form of a screw cap or a Aufprellkappe with a holding bead.
  • the closure is described herein in a position generally present when the closure has been applied and fixed to the container neck of the filled upright container.
  • An annular head plate, as it defines the closed side of the closure, for example in the case of a closure for large containers, is thus at the top and, for example, an annular cavity of the closure receiving the bottleneck edge faces downwards with its open side.
  • a dispensing nozzle may generally still be closed and capped by a closure seal, which may be a thin plastic film and either peeled or pierced prior to connection of the closure to a dispensing spigot.
  • a closure seal which may be a thin plastic film and either peeled or pierced prior to connection of the closure to a dispensing spigot.
  • a plastic closure when it is designed as a screw cap, usually also have a so-called guarantee strip, which is located at the bottom of the cap skirt and tears off when the closure is removed from the container neck and removed.
  • closure parts of the type in question have the membrane, which is also referred to as a "membrane seal", and which closes the opening cross-section of the withdrawal nozzle, for example a pouring spout.
  • plastic closures are generally carried out by injection molding in a mold which typically consists of a plurality of so-called cavities, each of the cavities forming the negative mold of the closure into which hot liquid plastic material, generally polypropylene, is produced under high pressure during the manufacture of this closure or polyethylene, is injected.
  • hot liquid plastic material generally polypropylene
  • the geometric center of the cap is at the same time in the center of the membrane, which in turn but one over at least 180 °, usually nearly 360 °, circumferential tear line, along which the membrane is intended to tear during later use, so that it can be pushed laterally out of the cross section of the extraction nozzle or the extraction pin over the remaining, non-weakened portion which acts as a kind of hinge.
  • the tear line In the cavity for a closure part with a membrane that can be torn out or folded out of the opening cross-section of the withdrawal nozzle, the tear line necessarily forms a constriction between the die and the die of the mold, through which the liquid plastic, which is fed via the sprue in the center of the membrane, is pressed through must be in order to fill the remaining parts of the mold, which include the sampling nozzle, the top plate and the circumferential cap shell, optionally including guarantee strip, as well as even sealing elements.
  • This requires on the one hand a good flowable plastic material and thus restricts the avail able to avail supply plastic, and on the other hand also requires very high pressures at which the liquid plastic must be injected into the mold to reach into the most remote from the sprue cavities. This also restricts the possibilities of manufacturing these closures true to scale within small tolerances.
  • the invention also relates to a method for producing a Kunststoffver closing part with a sampling nozzle and a cross-section of the sampling nozzle ver closing membrane according to any one of claims 1-13, which comprises the injection molding of the plastic closure part in an injection mold
  • the present invention Compared to this prior art, the present invention, the object of developing a closure member having the features mentioned and a method for its production to the effect that at least one of the problems listed above is taken besei.
  • a closure part having the features of claim 1, which is characterized in particular by the tear line being formed from a cut introduced into the material of the membrane after completion of the injection molding process with a cutting or punching tool .
  • the tear line being formed from a cut introduced into the material of the membrane after completion of the injection molding process with a cutting or punching tool .
  • the surface of a tear line introduced by cutting or punching differs from corresponding surfaces produced by constriction of a shape, so that the subsequent production of the tear line due to the surface structure and usually also on the cross-sectional shape of the tear line on the finished closure part is recognizable.
  • the plastic closure member may thus be initially manufactured in the injection mold without any tear line, i. the membrane has a relatively large and expediently uniform wall thickness, including its connection with the withdrawal nozzle continuously.
  • the injected in the center of the membrane liquid plastic can therefore easily through this cavity flow through without bottlenecks and spread over the entire volume of the injection mold or the respective cavity.
  • Only in the thus finished sprayed closure part is then in the vicinity of the outer edge of the membrane, i. at or near their connection to the sampling nozzle, a cut introduced, which detects the material of the membrane with a well-defined depth and this material is severed to a very small remaining wall thickness.
  • the remaining wall thickness in the region of this dividing line i.
  • the thickness of the remaining in the region of the cut wall of the membrane it can be set very accurately, and in particular less than 0.15 mm and they can preferably be reduced to a maximum of 0, 1 mm thickness.
  • the wall thickness of the membrane remaining below the incision is between 0.06 and 0.1 mm, in particular 0.08 mm.
  • the depth of cut can also be variably adjusted, in particular with a punching tool along the circumference of the membrane, in order, for example, to retain a greater material thickness along a short section in the circumferential direction, so that the relevant section can serve as a hinge, or around an initial section of the tear line, in the vicinity of which, for example, a grip ring attaches to be made particularly thin, since the membrane can be relatively easily separated along the remaining tear line when a starting section is already torn open.
  • the design of the tear line in the form of a subsequently introduced into the membrane incision has several advantages.
  • the plastic flow unhindered in the region of the tear line, since there is initially still a sufficiently large wall thickness of the membrane.
  • the pressures used in the injection can be reduced and one also has a greater freedom in the choice of the plastic material used.
  • the mold is simplified, because considerably less effort is required than in the case in which a precisely defined, very narrow flow gap has to be set for the tear line between die and punch.
  • the tear line of the membrane is cut in a region in which the wall thickness of the membrane (by the way), i. outside the area thinned by the incision itself, at least 0.5 mm. Furthermore, according to one embodiment, the membrane in the region of the cut tear line is reduced to a thickness of less than 0.15 mm, preferably to a maximum of 0.1 mm thickness.
  • the length of the tear line along the circumference can be adjusted very precisely in this way, wherein according to one embodiment it is provided that the tear line is more than 270 ° and less than 360 °, but in particular not more than 355 ° and preferably more than 330 ° extends.
  • the membrane With a reduction in the remaining, non-weakened portion of the membrane which effectively acts as a hinge upon engagement with the extraction peg, the membrane will no longer resist tearing if the hinge region is restricted to less than 30 ° along the circumference. On the other hand, a hinge portion of 10 ° circumferential length still securely holds the membrane to the dispensing nozzle, so there is no danger of the membrane being completely torn off the dispensing nozzle and then lying loosely within the container.
  • the radial distance of the tear line from the inner wall of the sampling nozzle in its directly adjacent to the membrane region according to an embodiment between 0.1 and 1 mm or corresponds exactly to the inner radius of the sampling nozzle, so is the cross section of the sampling nozzle in its adjacent to the membrane area adjusted as much as possible.
  • the membrane is expediently arranged at the lower end (ie at the end facing the interior of the container) of the withdrawal nozzle. Furthermore, it has proven to be expedient if the incision of the tear line is introduced from the inside of the closure part.
  • the membrane is in general more easily accessible from the inside of the closure part (which faces the interior of the container), in particular if it is attached to the lower end of the extraction nozzle, so that from here it is also possible to easily attach a corresponding tool which forms the recess the tear line produces.
  • the withdrawal nozzle runs according to an embodiment of the invention at least partially tapered conically from the top plate to the lower end. This conical taper facilitates the insertion of a removal pin.
  • the lower, adjacent to a membrane portion of the sampling nozzle is cylindrical, which facilitates a tight contact of the outer surface of a sampling pin on the inner wall of the sampling nozzle.
  • the closure part has a sealing neck, which extends axially downwards between the withdrawal nozzle and the cap jacket, for engagement with the inner wall of a container neck.
  • the sealing neck then forms, together with an outer portion of the top plate and the cap skirt, an annular peripheral U-shaped cavity, also referred to as a "closure foot", in which the upper edge of a bottle neck is sealingly receivable when the sealing neck sealingly engages the interior engages the container neck.
  • annular circumferential sealing elements may be provided which engage with the front side or the upper edge of the container neck.
  • the base of the U-shaped cavity is formed in this case by the lying between the cap skirt and the sealing piece portion of the top plate.
  • the gasket may be formed, for example, by a cylindrical gasket projecting downwardly from the top plate between the cap skirt and the extraction nozzle, which has a radially outwardly bulging sealing bead which is capable of sealingly engaging the inner surface of a container neck.
  • the lower edge of the cap skirt has a tamper-evident band connected to the cap edge by easily breakable bridges.
  • the partially filigree structure of such a guarantee strip as well as the respective sealing elements and their dimensional accuracy can be due to the inventive measures, ie by providing flow channels in the membrane area with a larger cross section and optionally also by using appropriate plastic materials, accomplish easier than conventional closures.
  • the object underlying the invention is achieved in that after injection molding and at least partial curing of the plastic closure part, an at least partially circumferential incision is made in the membrane.
  • the tear line is introduced only after the injection molding through an incision by means of a cutting or punching tool.
  • the incision may be introduced while the plastic closure member is still in the closed or partially opened injection mold prior to final ejection.
  • the method proves to be particularly advantageous when the sprue for filling the cavities of the injection mold in the region of the membrane, preferably in the center, because then the full material cross section of the membrane for the flow of the liquid plastic in all the associated areas of the Cavity is available and there are hardly any bottlenecks.
  • FIG. 1 is a perspective view of a plastic closure according to the invention in a view obliquely from below,
  • FIG. 2 shows a cross-section of a closure according to FIG. 1
  • FIG. 2A shows an enlarged section of FIG. 2, showing the closure axis
  • Figure 4 is a view along the closure axis on the closure from above.
  • Figure 5a-c a closure in different stages with closed and opened membrane and with an introduced removal pin
  • Figure 6 shows a cross section through the container standing on an overhead with an applied closure together with an introduced through the closure removal pin.
  • 1 shows a closure part according to the invention, in this case a complete closure 100 in a perspective view obliquely from below, ie from the closure opening into the interior of the closure 100. The following description refers simultaneously to FIGS. 1 to 4.
  • an annular top plate 1 at the outer edge of an approximately cylindrical cap casing 2 attaches, which extends axially downwards.
  • an initially downwardly conically tapered portion of a sampling nozzle 3 axially downwards, followed by a cylindrical portion at the end of which one recognizes the cross section of the sampling nozzle 3 closing membrane 7.
  • the membrane 7 is along most of its circumference only over a weakened by an incision material portion 8, which is referred to here as a "tear line, with a thin ring-shaped edge of the membrane 7, outside the tear line 8 and directly to the lower edge of Ent.estutzens 3 connected.
  • the incision thus runs along a circle of maximum diameter within the cross section of the sampling nozzle.
  • the tear line 8 is interrupted only by a very short, in the circumferential direction about 10 ° making hinge section 9, which holds the membrane to the sampling nozzle.
  • On the inside of the top plate 1 can be seen further between the sampling nozzle 3 and the cap casing 2 a circumferential sealing nozzle 1 1 and another, annular umlau fende seal 12 between the sealing nozzle 1 1 and the cap shell 2.
  • the cap coat also has an internal thread 13 and is connected via its lower edge with a folded guarantee band 14, a so-called flex band.
  • Figure 4 is a view of the plastic closure 100 from above, in which also the top plate 1, the cap skirt 2, the sampling nozzle 3 and the membrane 7 recognizes.
  • the section of Figure 2 with the enlarged section 2A corresponds to the section line A-A in Figure 4.
  • the plastic closure 100 can be seen in a perspective view from the inside in three different stages ver, namely in Figure 5A in an intact, unused state, in Figure 5B with a partially separated and folded out membrane 7 and in Figure 5C with a at completely unfolded membrane through the sampling nozzle 3 hin mange gleich th removal pin 20th
  • FIG. 6 shows a cross-section containing the axis in the state according to FIG. 5C.
  • the embodiment of a closure for large containers shown in the figures has a thread 13 which is screwed onto a matching thread of a large container.
  • the neck of such a large container has a radially outwardly facing securing ring (only indicated in FIG. 6), which is engaged behind by a flexible band 14.
  • the flex band 14 is an upwardly folded, axial extension of the cap skirt 2.
  • End projections of the flex band 14 are supported on the retaining ring 24 of the container neck and thus prevent unscrewing of the closure 100 of the container neck, wherein in the event of a violent twisting and the entire Flexband breaks off, which is connected by easily breakable bridges with the un direct edge of the cap skirt.
  • the upper edge or the upper portion of the container neck (which lies at the bottom in FIG. 6) is accommodated in an annular circumferential cavity, which is enclosed in a U-shape by the cap jacket 2, an outer portion of the annular head plate 1 and the sealing nozzle 1 1, which has the shape of a short hollow cylindrical portion with an outwardly projecting bead 16.
  • a further annular lip seal 12 extends downwardly between the seal neck 11 and the cap skirt 2 from the head plate 1 and communicates with the top of the bottle neck rim while the bead 16 sealingly abuts the inner surface of the neck of the container.

Landscapes

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

Abstract

L'invention concerne un élément de fermeture en matière plastique (10), qui peut être fixé sur un contenant ou un autre élément de fermeture à fixer sur le contenant. L'élément de fermeture comprend une tubulure de prélèvement (3) de forme tubulaire, dont la section transversale est fermée par une membrane (7) qui présente une ligne de déchirement (8) s'étendant en périphérie sur plus de 180° le long de son bord extérieur. L'invention concerne également un procédé correspondant servant à fabriquer une fermeture de ce type. L'invention vise à perfectionner un élément de fermeture présentant les caractéristiques mentionnées en introduction et un procédé de fabrication dudit élément de fermeture de manière à éliminer les problèmes survenant lors du moulage par injection à travers des canaux d'écoulement étroits. L'invention prévoit à cet effet que la ligne de déchirement (8) est formée par une découpe pratiquée par un outil de découpage ou d'estampage dans le matériau de la membrane (7).
EP18804551.2A 2017-11-16 2018-11-13 Élément de fermeture en matière plastique pourvu d'une membrane détachable Withdrawn EP3710373A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017126965.7A DE102017126965A1 (de) 2017-11-16 2017-11-16 Kunststoffverschlussteil mit abtrennbarer Membran
PCT/EP2018/081095 WO2019096795A1 (fr) 2017-11-16 2018-11-13 Élément de fermeture en matière plastique pourvu d'une membrane détachable

Publications (1)

Publication Number Publication Date
EP3710373A1 true EP3710373A1 (fr) 2020-09-23

Family

ID=64362509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18804551.2A Withdrawn EP3710373A1 (fr) 2017-11-16 2018-11-13 Élément de fermeture en matière plastique pourvu d'une membrane détachable

Country Status (5)

Country Link
US (1) US11377271B2 (fr)
EP (1) EP3710373A1 (fr)
CN (1) CN111183099A (fr)
DE (1) DE102017126965A1 (fr)
WO (1) WO2019096795A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019003940A1 (fr) * 2017-06-30 2019-01-03 日本クロージャー株式会社 Bouchon en plastique et son procédé de fabrication
US10676259B1 (en) 2018-11-15 2020-06-09 Silgan Dispensing Systems Corporation Two-part dispensing closure system with internal seal and methods of using the same

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Publication number Priority date Publication date Assignee Title
US4022258A (en) * 1975-10-28 1977-05-10 American Hospital Supply Corporation Ported closure and connector therefor
US4401227A (en) * 1981-08-17 1983-08-30 Pehr Harold T Tamper indicating closure cap
US4682702A (en) * 1986-06-27 1987-07-28 Sunbeam Plastics Corporation Tamper indicating closure
JP2000025816A (ja) * 1998-07-14 2000-01-25 Dainippon Printing Co Ltd 注出口の成形方法及び装置並びに注出口
CN2412850Y (zh) 1999-11-13 2001-01-03 徐永安 一种两用饮用水瓶盖
JPWO2002048020A1 (ja) * 2000-12-15 2004-06-10 ソシエテ デ プロデユイ ネツスル ソシエテ アノニム 飲料供給器およびプラスチック容器の蓋
NZ546837A (en) * 2003-10-27 2008-08-29 Portola Packaging Inc Twist-open closure having inclined frangible membrane
CN1590232A (zh) 2004-01-19 2005-03-09 王国平 错位式的瓶盖与模具型芯
CN2693684Y (zh) 2004-03-15 2005-04-20 于乔治 一种易刺破一体桶装水瓶盖
US20070278176A1 (en) * 2006-06-06 2007-12-06 Portola Packaging Inc. Closure having a valve with an arcuate frangible line
US7789277B2 (en) * 2006-06-12 2010-09-07 Rieke Corporation Closure assembly having a spout with a thicker band for spout directing
MX2009001154A (es) * 2006-07-31 2009-04-14 Liqui Box Canada Inc Ensamble de accesorio de perforacion.
DK2000417T3 (en) 2007-06-05 2015-10-12 Tetra Laval Holdings & Finance Close to a pourable food product container and process for making it.
US9321567B2 (en) * 2013-02-07 2016-04-26 Weatherchem Corporation Closure with tamper evident push-pull tether
CN203047763U (zh) 2013-02-26 2013-07-10 廖锦权 一种桶装水用的防渗漏的一次性使用瓶盖
CN203854982U (zh) 2014-05-27 2014-10-01 东莞市金富实业有限公司 饮水机水桶用防渗漏的防盗塑料瓶盖
CN204750898U (zh) 2015-04-30 2015-11-11 深圳市麦士德福科技股份有限公司 一种多用瓶盖
CN205396952U (zh) 2016-03-10 2016-07-27 胡安顺 饮用水桶
CN206606536U (zh) 2017-02-24 2017-11-03 张坦阳 桶装水顶穿式开启防盗封口盖

Also Published As

Publication number Publication date
US20200339312A1 (en) 2020-10-29
US11377271B2 (en) 2022-07-05
CN111183099A (zh) 2020-05-19
WO2019096795A1 (fr) 2019-05-23
DE102017126965A1 (de) 2019-05-16

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