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EP3539894B1 - Récipient en matière plastique et capsule filetée - Google Patents

Récipient en matière plastique et capsule filetée Download PDF

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Publication number
EP3539894B1
EP3539894B1 EP19160939.5A EP19160939A EP3539894B1 EP 3539894 B1 EP3539894 B1 EP 3539894B1 EP 19160939 A EP19160939 A EP 19160939A EP 3539894 B1 EP3539894 B1 EP 3539894B1
Authority
EP
European Patent Office
Prior art keywords
wall
container
tear
tab
twist 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.)
Active
Application number
EP19160939.5A
Other languages
German (de)
English (en)
Other versions
EP3539894A1 (fr
Inventor
Karsten Thuemmel
Steffen Kroon
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.)
Alpla Werke Alwin Lehner GmbH and Co KG
Original Assignee
Alpla Werke Alwin Lehner GmbH and Co KG
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 Alpla Werke Alwin Lehner GmbH and Co KG filed Critical Alpla Werke Alwin Lehner GmbH and Co KG
Priority to PL19160939T priority Critical patent/PL3539894T3/pl
Publication of EP3539894A1 publication Critical patent/EP3539894A1/fr
Application granted granted Critical
Publication of EP3539894B1 publication Critical patent/EP3539894B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • 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
    • B65D41/3404—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with ratchet-and-pawl mechanism between the container and the closure skirt or the tamper element
    • B65D41/3409—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with ratchet-and-pawl mechanism between the container and the closure skirt or the tamper element 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
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/023—Neck construction
    • B65D1/0246—Closure retaining means, e.g. beads, screw-threads
    • 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
    • B65D41/38—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt engaging a threaded ring clamped on the external periphery of the neck or wall
    • 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
    • B65D55/02—Locking devices; Means for discouraging or indicating unauthorised opening or removal of closure
    • B65D55/024—Closures in which a part has to be ruptured to gain access to the contents
    • 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
    • B65D2401/00—Tamper-indicating means
    • B65D2401/15—Tearable part of the closure
    • 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

Definitions

  • the invention relates to a plastic container with a screw cap according to the preamble of patent claim 1.
  • plastic containers have recently been used mainly.
  • the low weight and the lower costs certainly play a not inconsiderable role in this substitution.
  • the use of recyclable plastic materials and the overall more favorable overall energy balance in their manufacture also help to promote the acceptance of plastic containers among users.
  • the extrusion blow molding machines used for the extrusion blow molding process generally have one or more extruders for supplying the required plastic material.
  • the outlet of the extruder is connected to an extruder head, at whose outlet nozzle, preferably adjustable in opening width, the extruded hose emerges.
  • the extruded plastic tube can be constructed in one or more layers.
  • the hose emerging continuously or quasi-continuously from the outlet nozzle is transferred to a blow molding tool arrangement and inflated by overpressure with the aid of a blow pin inserted into the mold cavity.
  • the inflated plastic container is then removed from the mold.
  • Plastic containers made of polyethylene terephthalate (PET) and similar materials are usually produced in a so-called stretch blow molding process.
  • a cylindrical preform is produced in an injection molding process in an injection mold. Extrusion processes for the production of preforms have also recently been proposed.
  • the preform has a substantially elongated, cylindrical body and is formed closed at one longitudinal end.
  • a so-called support ring separates the body of the preform from a neck section with a pouring opening.
  • the neck section already has the later shape of the bottle neck and is usually no longer changed in the stretch blow molding process. Threaded sections or the like for fixing a closure part can already be formed on the outside of the neck section.
  • the preform After its production, the preform is removed from the mold and further processed immediately or temporarily stored on a stretch blow molding machine for later processing. Before further processing in a stretch blow molding machine, the preform is conditioned if necessary; then it is introduced into a blow mold of the stretch blow molding machine. In the blow mold, the preform is finally inflated according to the mold cavity by a gas blown in with overpressure and is usually additionally stretched with a stretching mandrel.
  • Another manufacturing process for plastic containers is the injection blow molding process, in which the blow molding process takes place directly after the injection molding of the preform.
  • the preform remains on the injection core, which can also form a kind of stretching mandrel.
  • the preform is in turn inflated by overpressure in accordance with the mold cavity of a blow mold that is fed towards the injection core or vice versa, and is optionally additionally stretched in the axial direction.
  • the finished plastic container is then removed from the mold.
  • This manufacturing process is used in particular for smaller plastic bottles and for so-called wide-necked containers.
  • Pasty masses such as mayonnaise, mustard, pesto, sugo and the like, but also pickles, corncobs, beans and other pickled vegetables and the like are often still stored and offered in glass containers.
  • the glass containers are usually provided with a metal closure that can be screwed onto the glass container.
  • the arrangement of multiple-start threads on the container neck, usually four-start threads, makes it possible to fix the metal closure with an incomplete turn, for example with four-start threads with a quarter turn, on the container neck or to loosen it again .
  • the usually warm-filled and / or hot-sterilized content of the glass container generates a negative pressure when it cools inside the container, which has been closed for the first time, by which a slightly deformable central section of the metal closure is drawn in the direction of the container.
  • the metal closure is unscrewed for the first time, the consumer hears a "plop sound" which is produced by the return of the central section of the metal closure to its original position as a result of the pressure equalization in the container.
  • This "popping sound” signals to the consumer that the container was properly closed and that it has not been tampered with since the contents were filled, and thus represents a kind of tamper-evident guarantee.
  • glass containers are very energy-intensive and contributes to the emission of carbon dioxide into the environment. As a result of their relatively high weight, the transport of glass containers also causes a not inconsiderable increase in carbon dioxide emissions. This applies to the transport of newly manufactured glass containers as well as to glass containers that are broken down and recycled. If, on the other hand, glass containers are used as reusable containers, the cost of cleaning the containers must also be taken into account in the life cycle assessment in addition to transporting the glass containers.
  • Containers with a tamper-evident guarantee are for example from the U.S. 4,630,743 , U.S. 4,456,136 and from the U.S. 5,265,751 known.
  • the U.S. 4,630,743 discloses a container according to the preamble of claim 1.
  • the subject of the invention is therefore a plastic container with a screw cap made of plastic, which plastic container has a container body and an adjoining container neck with a container opening.
  • first threaded sections with first thread inlets are provided for a form-fitting fixing of a rotary lock.
  • the rotary closure has a top surface covering the container opening and a cylindrical jacket which protrudes from the top surface and partially overlaps the container neck axially.
  • second threaded sections are formed which, when the rotary closure is screwed on, can be brought into engagement with the first threaded sections on the outer wall of the container neck.
  • the first threaded sections on the outer wall of the container neck have at least two first thread inlets which are arranged at an angular distance from one another on the circumference of the container neck.
  • Each first thread inlet is assigned a reverse rotation lock projecting beyond the outer wall of the container neck, which is approximately wedge-shaped in the circumferential direction of the outer wall of the container neck and has a stop projecting radially with respect to the outer wall of the container neck.
  • the casing of the rotary fastener is equipped with a tear-off tab which is arranged in a window-like recess of the casing that is open towards a free axial end of the casing.
  • the tear-off tab is connected via at least one separable web to a peripheral wall of the recess in the jacket.
  • the tear-off tab is arranged on the circumference of the rotary fastener in such a way that when the rotary fastener is screwed on, a front section of the tear-off tab protruding radially over the inner wall of the jacket is adjacent to the stop of the reverse rotation lock and comes into contact with the stop of the reverse rotation lock when the rotary fastener is turned back.
  • the twist lock is very easy to mount on the container, in particular in a position rotated about its longitudinal axis.
  • the tear-off tab provided on the casing of the twist lock when the twist lock is installed, interacts with the anti-rotation locks assigned to each thread inlet on the container neck and has the function of a freshness seal or an indication of first opening. If the twist lock is unscrewed, the front section of the tear-off tab strikes the stop of the reverse rotation lock and the at least one web that connects the tear-off tab in the recess with the jacket is sheared off. This detaches the tear-off tab from the casing of the twist lock.
  • the tear-off flap thus fulfills the function of a freshness seal, or the twist lock equipped with the tear-off flap represents a tamper-evident guarantee.
  • the plastic container is preferably designed as a wide-necked container. Wide mouth containers have a very large opening in relation to the body of the container. Typical ratios between the circumferential line delimited by the opening and the circumferential line delimited by the container body are approximately 60% to 120%, the circumferential line of the container body representing a mean in the case of structured container bodies. In the case of wide-mouth containers, the contents of the container are typically removed using a finger or spoon.
  • the at least two first thread inlets of the first thread sections are arranged on the outer wall of the container neck at an angular distance of 180 ° from one another. This means that the twist lock can also be mounted in a position rotated by 180 ° about its longitudinal axis.
  • the first thread sections on the outer wall of the container neck have four first thread inlets which are each arranged at an angular distance of 90 ° from one another.
  • This embodiment variant allows the twist lock to be mounted in a position rotated by 90 ° about its longitudinal axis.
  • a number of second thread inlets are provided on the inner wall of the closure lid, which corresponds to the number of first thread inlets on the outer wall of the container neck.
  • each anti-rotation lock is designed as a wedge-shaped bar running in the circumferential direction of the container neck and has the greatest protrusion over the outer wall of the container neck at the radially protruding stop.
  • This variant is very easy to manufacture in terms of manufacturing technology.
  • the protrusion of the stop relative to the outer wall of the container neck can be about 1 mm to 2 mm.
  • the tear-off tab is connected to the circumferential boundary wall of the recess in the casing of the rotary fastener via two separable webs which are spaced apart in the circumferential direction of the tear-off tab.
  • An embodiment variant of the invention can provide that each web is tapered from a connection to the tear-off tab to a connection to the jacket. Since the connecting web is designed to be thinnest at the connection to the jacket, a defined predetermined breaking point is created on the jacket. If the tear-off tab is separated from the jacket when the twist lock is opened, the webs remain connected to the tear-off tab and can be disposed of together with this if necessary.
  • the tear-off tab on the end section has the greatest overhang relative to the inner wall of the jacket of the Twist lock, the largest protrusion is about 1.5 mm to about 2 mm.
  • the tear-off tab is connected at its longitudinal end facing away from the front section via a film hinge to a delimiting wall of the recess in the casing of the rotary fastener running in the axial direction.
  • the one-sided connection of the tear-off tab with the jacket via a film hinge ensures that the tear-off tab remains connected to the jacket of the rotary fastener when the web or bars are separated.
  • the tear-off tab then protrudes radially from the casing of the twist lock, whereby the user is shown even better that the plastic container has already been opened for the first time.
  • the film hinge can have a wall thickness of approximately 0.3 mm to approximately 0.8 mm. These wall thicknesses are sufficient so that the tear-off tab remains connected to the casing of the rotary fastener when the webs are separated. On the other hand, the wall thickness of the film hinge is small enough that the user can easily detach the tear-off tab from the jacket if necessary.
  • a further embodiment of the invention provides that the tear-off tab, at its longitudinal end facing away from the front end, in addition to the film hinge, has a plastic skin with the in the circumferential direction extending boundary wall of the recess in the jacket is connected.
  • the plastic membrane is overstretched and possibly torn when the tear-off tab is first opened and when the tear-off tab is radially extended and when the connection between the webs and the jacket is sheared off. That way compared to its original Training injured plastic skins thereby prevents the tear-off tab from being returned to its original position in the window-like recess in the casing of the rotary fastener. An initial opening of the plastic container cannot be hidden as a result.
  • the tear-off tab is at its longitudinal end facing away from the front section; flattened. It advantageously has a wall thickness there that is less than a wall thickness of an adjacent area of the casing of the rotary fastener.
  • the smaller wall thickness of the longitudinal section of the tear-off tab facing away from the front section can prevent the longitudinal section from bumping into the adjoining area of the jacket and thereby hindering the radial opening of the tear-off tab.
  • the tear-off tab has a wall thickness of approximately 0.3 mm to approximately 0.8 mm at its longitudinal end facing away from the front section.
  • the jacket of the twist lock has a wall thickness of approximately 0.5 mm to approximately 1.5 mm, preferably approximately 0.8 mm to 1.3 mm, particularly preferably approximately 1 mm to approximately 1.2 mm.
  • the casing of the twist lock has a sufficiently great rigidity to ensure a secure closure of the plastic container.
  • the wall thickness is small enough to give the jacket sufficient elasticity so that the tear-off tab can slide over the anti-rotation lock when it is closed.
  • the screw cap of the plastic container is preferably produced in an injection molding process.
  • the injection molding of plastics has been tried and tested and allows for a cost-effective production of rotary caps with the required dimensional accuracy.
  • the main plastic component of the screw cap ie more than 70 percent by weight, is a polyolefin, preferably polypropylene.
  • the plastic container consists of polymers whose main component, i.e. more than 70 percent by weight, is at least one material from the group consisting of polyolefins, in particular polypropylene (PP), high density polyethylene (HDPE), low density polyethylene (LDPE), polyesters, in particular polyethylene terephthalate ( PET), polyethylene furanoate (PEF), polypropylene furanoate (PPF), polylactides (PLA), styrene polymers, in particular styrene-acrylonitrile (SAN), general purpose polystyrene (GPS), high impact polystyrene (HIPS), their copolymers and mixtures of the polymers mentioned .
  • the plastics listed have been tried and tested and have been adequately investigated with regard to their use in the food sector.
  • the plastic container is preferably produced from a preferably injection-molded preform in a stretch blow molding process.
  • the injection molding of preforms allows tight dimensional accuracies to be maintained, especially in the neck area, which are retained in the subsequent stretch blow molding process, in which the neck area is generally no longer changed.
  • FIG Fig. 1 A plastic container designed according to the invention, in particular a wide-necked plastic container, with a plastic screw cap is shown in FIG Fig. 1 and in Fig. 2 provided overall with the reference number 1.
  • the plastic container has a container body 2 closed with a container base 3, to which a container neck 4 with a container opening 5 is connected.
  • the container opening 5 can have an inner diameter of, for example, approximately 45 mm to approximately 120 mm.
  • First threaded sections 7 are formed on an outer wall 6 of the container neck 4.
  • the first threaded sections 7 have first thread inlets 8 and are used for a form-fitting securing of a twist lock 20.
  • at least two first threaded portions 7 with an equal number of first thread inlets 8 are arranged on the outer wall 6 of the container neck 4.
  • first threaded sections 7 with four first thread inlets 8 are provided on the container neck 4. Because of the perspective view, only two of these are arranged evenly over the circumference of the container neck 4 first thread sections 7 with first thread inlets 8 clearly visible. From a third first threaded section 8 is in Fig. 1 or in Fig. 2 only the first thread run-in 8 is visible. A fourth, first threaded section 7 is covered in the perspective illustration.
  • the individual first thread sections 7 and first thread inlets 8 each have the same reference symbols, since they have identical functions compared to the rotary fastener 20.
  • the first threaded sections 7 and the associated first thread inlets 8 are evenly distributed over the circumference of the container neck 4.
  • first thread inlets 8 In the case of two first thread sections 7 with first thread inlets 8, the first thread inlets 8 have an angular spacing in the circumferential direction of approximately 180 °. In the case of four first thread sections 7, adjacent first thread inlets 8 have an angular spacing in the circumferential direction of approximately 90 °.
  • each reverse rotation lock 9 is formed below each first threaded section 7 on the outer wall 6 of the container neck 4.
  • Each reverse rotation lock 9 is designed in the circumferential direction as an approximately wedge-shaped bar.
  • each anti-rotation lock 9 in the circumferential direction increasingly protrudes beyond the outer wall 6 of the container neck 4 and at its end has a stop 10 projecting radially with respect to the outer wall 6 of the container neck 4. At the radially projecting stop 10, the anti-rotation lock 9 projects beyond the outer wall 6 of the container neck by about 1 mm to about 2 mm.
  • Each anti-rotation lock 9 is arranged along the circumference of the container neck 4 in such a way that the radial protruding stop 10 is approximately aligned in the axial direction with the end region of the associated thread section 7 facing away from the thread inlet 8 or is located at the beginning of the gap between two adjacent thread sections 7.
  • the term "in the circumferential direction" means in the screwing-on direction of the cover.
  • the in Fig. 1 and in Fig. 2 The rotary closure shown is provided with the reference number 20 and has a top surface 21 covering the container opening 5 and a cylindrical jacket 22 which protrudes from the top surface 21.
  • the jacket 22 partially overlaps the container neck 4 axially.
  • Out Fig. 9 it can be seen that on an inner wall 23 of the jacket 22 of the rotary fastener 20 second threaded sections 24 are formed.
  • the twist lock 20 is screwed on, the second threaded sections are in engagement with the first threaded sections 7 on the outer wall 6 of the container neck 4 ( Fig. 1 ).
  • second threaded sections 24 are arranged at a uniform angular distance from one another on the circumference of the inner wall 23 of the casing 22.
  • the number of second threaded sections 24 expediently corresponds to the number of first threaded sections 7 on the container neck 4.
  • the second threaded sections 24 have second thread inlets 25 which are arranged at a uniform angular distance from one another. In the case of two second thread inlets 25, the angular distance is approximately 180 °.
  • adjacent thread inlets 25 have an angular distance of approximately 90 ° from one another.
  • Figs. 1 and 2 are also in Fig. 9 due to the perspective view, not all four second thread sections 24 with thread inlets 25 are visible.
  • the jacket 22 of the rotary fastener 20 has a window-like recess 26 open towards a free axial end of the jacket 22.
  • a tear-off tab 30 is arranged in the window-like recess 26, which has two axial delimiting walls 27, 28 and a delimiting wall 29 running in the circumferential direction of the casing 22.
  • the tear-off tab 30 is connected via at least one separable web 35 to the peripheral wall 29 of the recess 26, which wall runs in the circumferential direction.
  • the tear-off tab 30 is connected via two webs 35 to the boundary wall 29 extending in the circumferential direction.
  • the tear-off tab 30 is connected via a film hinge 32 to the leading axial boundary wall 27 of the recess 26 in the casing 22 of the rotary closure 20.
  • FIG. 2 the plastic container and the associated screw cap made of plastic are provided overall with the reference number 1.
  • the plastic container and the screw cap are identical with respect to the basis of Fig. 1 explained structure.
  • Fig. 1 shows Fig. 2 the twist lock 20 after it has been released from Container neck 4 was unscrewed.
  • the webs 35 were separated from the boundary wall 29 of the recess 26 in the casing 22, which wall runs in the circumferential direction.
  • the tear-off tab 30 is only connected to the axial boundary wall 27 of the recess 26 in the jacket 22 via the film hinge 32 and protrudes radially.
  • Fig. 3 shows a side view of the rotary fastener 20.
  • the top surface bears the reference number 21, the cylindrical jacket protruding axially therefrom is provided with the reference number 22.
  • the tear-off tab 30 arranged in the window-like recess 26 is connected to the casing 22 via the webs 35 and via the film hinge 32.
  • Fig. 4 shows a cross section of the rotary fastener 20, approximately at half the axial height of the tear-off tab 30 with a view of the top surface 21. It can be seen from the illustration that the tear-off tab 30 protrudes over the inner wall 23 of the casing 22 at its end section 33 facing away from the film hinge 32.
  • Fig. 5 shows an in Fig. 4 Circled detail of the cross-sectional view of the rotary fastener 20 on an enlarged scale.
  • the same components have the same reference symbols as in Fig. 4 .
  • the tear-off tab 30 on the end section 33 has the greatest overhang d with respect to the inner wall 23 of the jacket 22.
  • the protrusion d is, for example, about 1 mm to about 2 mm.
  • the film hinge 32 has a wall thickness f of approximately 0.3 mm to approximately 0.8.
  • the tear-off tab 30 At its end area 31 facing the film hinge 32, the tear-off tab 30 has a smaller wall thickness than the adjoining area of the casing 22.
  • the tear-off tab 30 can have a slope there with respect to its outer wall.
  • Fig. 6 shows a perspective view of the portion of the casing 22 of the rotary fastener comprising the tear-off tab 30. It can be seen from the illustration that the webs 35, via which the tear-off tab 30 is connected to the boundary wall 29 of the recess 26 in the jacket 22 running in the circumferential direction, taper from the tear-off tab 30 to the jacket 22. This creates a predetermined breaking point for the webs 35 at the connection to the jacket 22 and the webs also remain connected to this when the tear-off tab 30 has been detached. The figure also shows that the tear-off tab 30 is connected 22 at its longitudinal end 31 facing away from the front end 33, in addition to the film hinge 32, via a plastic skin 34 to the peripheral wall 29 of the recess 26 in the jacket.
  • the plastic skin 34 is overstretched during the initial opening, in which the tear-off tab 30 is raised radially and the connection of the webs 35 to the jacket 22 is severed, in particular sheared off, and possibly also torn.
  • the plastic skin 34 damaged in this way compared to its original design prevents the tear-off tab 30 from being returned to its original position in the window-like recess 26 in the jacket 22 of the rotary fastener.
  • Fig. 7 shows a perspective view from below into the interior of the rotary fastener 20.
  • the top surface of the rotary fastener 20 again bears the reference number 21.
  • the cylindrical jacket 22 protruding axially from the top surface 21 has the inner wall 23.
  • the second formed on the inner wall 23 of the cylindrical jacket 22 Threaded sections are provided with the reference number 24.
  • four second threaded sections 24 are formed on the inner wall 23 of the jacket 22, three of which can be seen.
  • the second threaded sections 24 have the same angular spacing from one another. Every second threaded section 24 has a thread inlet 25.
  • the tear-off tab 30 in the window-like recess in the cylindrical jacket 22 is connected to the jacket 22 via the webs 35. At its end section 33 facing away from the film hinge 32, the tear-off tab 30 projects beyond the inner wall 23 of the casing 22.
  • Fig. 8 is a perspective view of the container 1 with the screw cap 20 screwed onto the container neck 4.
  • the container body again bears the reference number 2.
  • the tear-off tab 30 arranged in the window-like recess 26 in the cylindrical jacket 22 is intact.
  • FIGS. 9 to 11 serve to explain the function of the tear-off tab 30 as a tamper-evident guarantee.
  • Fig. 9 shows the twist lock 20, which is screwed onto the container neck 3, which connects to the container body 2.
  • the portion of the end face 33 of the tear-off tab 30 protruding beyond the inner wall of the jacket 22 is arranged in the vicinity of the radially projecting stop 10 of the reverse rotation lock 9.
  • the end face 33 of the tear-off tab 30 strikes the stop 10 of the reverse rotation lock 9.
  • Fig. 12 finally shows a perspective view of the screw cap 20 completely unscrewed from the container neck 4.
  • the container body again bears the reference number 2.
  • the radially raised tear-off tab 30 is still connected to the jacket 22 of the twist cap 20 via the film hinge 32 and can be completely detached if necessary.
  • the jacket of the twist lock has a wall thickness of approximately 0.5 mm to approximately 1.5 mm, preferably approximately 0.8 mm to 1.3 mm, particularly preferably approximately 1 mm to approximately 1.2 mm. With these wall thicknesses, the casing of the twist lock has a sufficiently great rigidity to ensure a secure closure of the plastic container. On the other hand, the wall thickness is small enough to give the jacket sufficient elasticity so that the tear-off tab can slide over the anti-rotation lock when it is closed.
  • the screw cap of the plastic container is preferably produced in an injection molding process.
  • the injection molding of plastics has been tried and tested and allows for a cost-effective production of rotary caps with the required dimensional accuracy.
  • the screw cap comprises a polyolefin, preferably polypropylene, as the main plastic component, ie more than 70 percent by weight.
  • the twist lock can be formed in one piece.
  • the plastic container consists of polymers whose main component, i.e. more than 70 percent by weight, is at least one material from the group consisting of polyolefins, in particular polypropylene (PP), high density polyethylene (HDPE), low density polyethylene (LDPE), polyesters, in particular polyethylene terephthalate ( PET), polyethylene furanoate (PEF), polypropylene furanoate (PPF), polylactides (PLA), styrene polymers, in particular styrene-acrylonitrile (SAN), general purpose polystyrene (GPS), high impact polystyrene (HIPS), their copolymers and mixtures of the polymers mentioned .
  • the plastics listed have been tried and tested and have been adequately investigated with regard to their use in the food sector.
  • the plastic container is preferably produced from a preferably injection-molded preform in a stretch blow molding process.
  • the injection molding of preforms allows tight dimensional accuracies to be maintained, especially in the neck area, which are retained in the subsequent stretch blow molding process, in which the neck area is generally no longer changed.

Landscapes

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

Claims (18)

  1. Récipient en matière plastique (1) comprenant une fermeture tournante en matière plastique, lequel récipient en matière plastique (1) présente un corps de récipient (2) et un col de récipient (4) se raccordant à celui-ci et comportant un orifice de récipient (5), sachant que des premières parties filetées (7), comportant des premières entrées de filet (8), sont prévues sur une paroi externe (6) du col de récipient (4), à des fins de fixation par complémentarité de formes d'une fermeture tournante (20), laquelle fermeture tournante (20) présente une surface de dessus (21), recouvrant l'orifice de récipient (5), et une jupe (22) cylindrique qui s'étend à partir de la surface de dessus (21) et s'engage en partie axialement sur le col de récipient (4), et sachant que des deuxièmes parties de filet (24) sont réalisées sur une paroi interne (23) de la jupe (22), qui, lorsque la fermeture tournante (20) est vissée, peuvent être amenées en prise avec les premières parties de filet (7) de la paroi externe (6) du col de récipient (4), les premières parties de filet (7) sur la paroi externe (6) du col de récipient (4) présentant au moins deux premières entrées de filet (8) qui sont disposées à une distance angulaire l'une de l'autre sur le pourtour du col de récipient (4), sachant qu'est associé à chaque première entrée de filet (8), un élément de blocage de rotation inverse (9) qui dépasse par rapport à la paroi externe (6) du col de récipient (4) et qui est réalisé à peu près en forme de coin dans le sens périphérique de la paroi externe (6) du col de récipient (4) et présente une butée (10) faisant saillie radialement par rapport à la paroi externe (6) du col de récipient (4), et sachant que la jupe (22) de la fermeture tournante (20) est dotée d'une languette d'arrachage (30), caractérisé en ce que la languette d'arrachage (30) est disposée dans un évidement (26) en forme de fenêtre de la jupe (22), ouvert en direction d'une extrémité axiale (31) libre de la jupe (22), et est reliée par au moins une arête (35) détachable à une paroi de limitation de l'évidement (26) de la jupe (22) qui s'étend dans le sens périphérique, laquelle languette d'arrachage (30) est disposée sur le pourtour de la fermeture tournante (20) de manière à ce que, lorsque la fermeture tournante (20) est vissée, une partie frontale (33) de la languette d'arrachage (30) qui dépasse radialement par rapport à la paroi interne (23) de la jupe (20) vienne se placer à proximité de la butée (10) de l'élément de blocage de rotation inverse (9) et, lors d'une rotation inverse de la fermeture tournante (20), vienne en appui contre la butée (10) de l'élément de blocage de rotation inverse (9).
  2. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon la revendication 1, caractérisé en ce que les premières entrées de filet (8), au nombre d'au moins deux, des premières parties de filet (7) sont disposées sur la paroi externe (6) du col de récipient (4) à une distance angulaire de 180 ° les unes des autres.
  3. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon la revendication 1 ou 2, caractérisé en ce que les premières parties de filet (7) prévues sur la paroi externe (6) du col de récipient (4) présentent quatre premières entrées de filet (8) qui sont disposées respectivement à une distance angulaire de 90 ° les unes des autres.
  4. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon l'une des revendications précédentes, caractérisé en ce que les deuxièmes parties de filet (24), disposées sur la paroi interne (23) du couvercle de fermeture, présentent un nombre de deuxièmes entrées de filet (25) qui correspond au nombre de premières entrées de filet (8) sur la paroi externe (6) du col de récipient (4) .
  5. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon l'une des revendications précédentes, caractérisé en ce que chaque élément de blocage de rotation inverse (9) est réalisé comme nervure en forme de coin, s'étendant dans le sens périphérique du col de récipient (4), et présente la saillie maximale par rapport à la paroi externe (6) du col de récipient (4) à l'emplacement de la butée (10) faisant saillie dans le sens radial.
  6. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon la revendication 5, caractérisé en ce que la saillie de la butée (10) par rapport à la paroi externe du col de récipient (4) est d'environ 1 mm à 2 mm.
  7. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon l'une des revendications précédentes, caractérisé en ce que la languette d'arrachage (30) est reliée par deux arêtes (35) détachables, disposées à distance l'une de l'autre dans le sens périphérique de la languette d'arrachage (30), à la paroi de limitation de l'évidement (26) de la jupe (22) de la fermeture tournante qui s'étend dans le sens périphérique.
  8. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon la revendication 7, caractérisé en ce que chaque arête (35) est réalisée de manière à se rétrécir à partir d'un point d'attache sur la languette d'arrachage (30) jusqu'à un point d'attache sur la jupe (22).
  9. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon l'une des revendications précédentes, caractérisé en ce que sur sa partie frontale (33), la languette d'arrachage (30) présente la plus grande saillie par rapport à la paroi interne (23) de la jupe (22) de la fermeture tournante (20), la plus grande saillie étant d'environ 1 mm à environ 2 mm.
  10. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon l'une des revendications précédentes, caractérisé en ce que, à son extrémité longitudinale opposée à la partie frontale (33), la languette d'arrachage (30) est reliée par une charnière-film (32) à une paroi de limitation de l'évidement (26) de la jupe (22) de la fermeture tournante (20) qui s'étend dans la direction axiale.
  11. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon la revendication 10, caractérisé en ce que la charnière-film (32) présente une épaisseur de paroi d'environ 0,3 mm à environ 0,8 mm.
  12. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon la revendication 10 ou 11, caractérisé en ce que, à son extrémité longitudinale opposée à son extrémité frontale, la languette d'arrachage (30) est reliée, en plus de la charnière-film (32), par un élément pelliculaire en matière plastique (34) à la paroi de limitation de l'évidement (26) de la jupe (22) qui s'étend dans la direction périphérique.
  13. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon l'une des revendications précédentes, caractérisé en ce que, à son extrémité longitudinale opposée à la partie frontale (33), la languette d'arrachage (30) présente une épaisseur de paroi qui est plus faible qu'une épaisseur de paroi d'une zone adjacente de la jupe (22) de la fermeture tournante.
  14. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon la revendication 13, caractérisé en ce que, à son extrémité longitudinale opposée à la partie frontale (33), la languette d'arrachage (30) est réalisée sous une forme aplatie et présente une épaisseur de paroi allant d'environ 0,3 mm à environ 0,8 mm.
  15. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon l'une des revendications précédentes, caractérisé en ce que la jupe (22) de la fermeture tournante (20) présente une épaisseur de paroi allant d'environ 0,5 mm à environ 1,5 mm, de préférence d'environ 0,8 mm à 1,3 mm, et de façon particulièrement avantageuse d'environ 1 mm à environ 1,2 mm.
  16. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon l'une des revendications précédentes, caractérisé en ce que la fermeture tournante (20) présente en tant que constituant principal de matière plastique, c'est-à-dire à plus de 70 pour cent en poids, une polyoléfine, de préférence du polypropylène, et est fabriquée selon un procédé de moulage par injection.
  17. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon l'une des revendications précédentes, caractérisé en ce que le récipient en matière plastique (1) se compose de polymères dont le constituant principal, c'est-à-dire représentant plus de 70 pour cent en poids, se compose d'au moins un matériau du groupe comprenant des polyoléfines, notamment du polypropylène (PP), le polyéthylène haute densité (PE-HD), le polyéthylène basse densité (PE-BD), des polyesters, notamment le polyéthylène téréphtalate (PET), le polyéthylène furanoate (PEF), le polypropylène furanoate (PPF), des polylactides (PLA), des polymères styréniques, notamment le styrène-acrylonitrile (SAN), le polystyrène standard (GPPS), le polystyrène choc (HIPS), leurs copolymères et des mélanges des polymères cités.
  18. Récipient en matière plastique (1) comprenant une fermeture tournante (20) selon l'une des revendications précédentes, caractérisé en ce que le récipient en matière plastique (1) est fabriqué selon un procédé d'étirage-soufflage, à partir d'une préforme réalisée de préférence par moulage par injection.
EP19160939.5A 2018-03-14 2019-03-06 Récipient en matière plastique et capsule filetée Active EP3539894B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19160939T PL3539894T3 (pl) 2018-03-14 2019-03-06 Pojemnik z tworzywa sztucznego z zakręcanym zamknięciem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00325/18A CH714783A1 (de) 2018-03-14 2018-03-14 Kunststoffbehälter mit einem Drehverschluss.

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EP3539894A1 EP3539894A1 (fr) 2019-09-18
EP3539894B1 true EP3539894B1 (fr) 2020-08-12

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CH (1) CH714783A1 (fr)
DK (1) DK3539894T3 (fr)
PL (1) PL3539894T3 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018111064A1 (de) * 2018-05-08 2019-11-14 Lockcon Ag Öffnungsmaschinenvorrichtung und Probenbehälter zur Verwendung mit der Öffnungsmaschinenvorrichtung
CN113277199A (zh) * 2021-07-05 2021-08-20 天长市天骏塑料包装制品有限公司 具有自锁与密封功能的易拉式密封塑料罐
FR3146662B1 (fr) * 2023-03-13 2025-03-21 Albea Services Capsule a charniere munie d’un temoin d’integrite

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK147510C (da) * 1982-07-01 1985-03-04 Johannes Saemundur Palsson Sikkerhedslukke med en lukkehaette, som kan saettes paa en beholderhalsdel, der har et spaerreorgan for lukkehaetten
US4630743A (en) * 1984-10-01 1986-12-23 Sunbeam Plastics Corporation Tamper indicating child resistant closure
US5265751A (en) * 1991-11-01 1993-11-30 Russel-Stanley Corporation Safety container
US20110174761A1 (en) * 2008-05-19 2011-07-21 Omega Cap Solutions, LLC Visual tamper-evident conical screw cap and neck finish

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CH714783A1 (de) 2019-09-30
DK3539894T3 (da) 2020-11-16
EP3539894A1 (fr) 2019-09-18
PL3539894T3 (pl) 2021-01-25

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