EP3934993A1 - Fermeture rotative en matière synthétique comprenant au moins un élément de liaison - Google Patents

Fermeture rotative en matière synthétique comprenant au moins un élément de liaison

Info

Publication number
EP3934993A1
EP3934993A1 EP20705702.7A EP20705702A EP3934993A1 EP 3934993 A1 EP3934993 A1 EP 3934993A1 EP 20705702 A EP20705702 A EP 20705702A EP 3934993 A1 EP3934993 A1 EP 3934993A1
Authority
EP
European Patent Office
Prior art keywords
screw cap
web
edge
guarantee
niche
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.)
Pending
Application number
EP20705702.7A
Other languages
German (de)
English (en)
Inventor
Werner F. Dubach
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.)
Deltona Innovations AG
Original Assignee
Deltona Innovations AG
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 Deltona Innovations AG filed Critical Deltona Innovations AG
Publication of EP3934993A1 publication Critical patent/EP3934993A1/fr
Pending 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
    • B65D55/00—Accessories for container closures not otherwise provided for
    • B65D55/16—Devices preventing loss of removable closure members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/72—Contents-dispensing means
    • B65D5/74—Spouts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/72—Contents-dispensing means
    • B65D5/74—Spouts
    • B65D5/746—Spouts formed separately from the container
    • B65D5/747—Spouts formed separately from the container with means for piercing or cutting the container wall or a membrane connected to said wall
    • B65D5/748—Spouts formed separately from the container with means for piercing or cutting the container wall or a membrane connected to said wall a major part of the container wall or membrane being left inside the container after the opening

Definitions

  • Plastic screw cap with at least one
  • the present invention describes a screw cap of a plastic screw cap, comprising an upper cover wall, a jacket wall, an internal thread and a screw cap edge, wherein the screw cap edge is arranged opposite a guarantee band and at least one connecting element with a guarantee band connection web, a central web and a
  • Retaining ring from the screw cap edge is arranged so as to be non-detachable, and a plastic screw cap for a plastic container or a container made of a laminate with a screw cap and a pouring spout, comprising a pouring spout wall on which an external thread, a
  • Retaining bead and a collar or flange are formed.
  • Plastic screw caps as a closure device for various containers of liquids have long been known.
  • the containers to be sealed are soft packaging made from a film, a multilayer film or a coated cardboard box.
  • liquid containers made of various plastics, such as PET are also worth mentioning here.
  • Such containers are filled with still liquids or liquids charged with carbonic acid, in some cases high pressures of several bar above atmospheric pressure acting inside the container. Accordingly, the closures used must meet these high pressures withstand.
  • containers made of glass or metal are also equipped with plastic screw caps, with a screw cap being rotatably removable and attachable to a pouring spout.
  • Known plastic screw caps are composed of a pouring spout and a screw cap made of plastic.
  • the screw cap has an internal thread which can be effectively connected to an external thread on the pouring spout. After unscrewing and removing the screw cap, liquid can be drawn out of the container through the pouring nozzle.
  • a cutting device is mounted in the pouring spout so that it can rotate and be linearly advanced, which when the screw cap is first screwed on, with a cutting edge, cuts through a mostly pre-perforated wall and / or film of the container.
  • DLI-028-P-WO Guaranteed band connected and each have a plurality of differently oriented incline sections which are oriented opposite to one another.
  • Such a constellation of connecting elements may briefly prevent the screw cap from being undesirably detached from the tamper-evident band after the first opening.
  • the connecting elements are too weak to absorb higher tensile forces and vary in length after the screw cap is screwed on and off several times, so that the connecting elements are no longer properly folded or looped between the screw cap edge and the guarantee band after a short time.
  • the connecting elements then protrude undesirably over the edge of the screw cap towards the longitudinal axis or outward, ie radially over.
  • the present invention has set itself the task of improving a plastic screw cap or a screw cap of a plastic screw cap that remains captive in such a way that the at least one connecting element never protrudes undesirably radially from the screw cap edge after being screwed on and off several times.
  • the at least one connecting element is designed to be non-clampable in every rotational state. Another effect is that the at least one connecting element can absorb higher tensile forces compared to the prior art.
  • the at least one connecting element must not be torn off or damaged either during the industrial filling of containers or when the screw cap is screwed on and off.
  • the previous production methods using plastic injection molding should remain unchanged
  • DLI-028-P-WO and a safe fastening of the plastic screw cap on the pouring spout should be mechanically enabled.
  • the plastic screw cap should, as usual, be removable from the pouring spout by rotating the screw cap, with a permanent connection between the screw cap and pouring spout always remaining.
  • the above-mentioned advantages are provided by a screw cap with the features of claim 1.
  • the screw cap can not only be permanently connected to the pouring spout by the at least one connecting element, but due to the hinge-free, wrinkle-free design of only one central web, higher tensile forces can safely act on the at least one connecting element . Since fewer kink points or kinks are used, frequent screwing on and screwing down is achieved without tangling the essentially straight connecting element.
  • the plastic screw cap for various containers that can be achieved with such a screw cap has the features of claim 17.
  • FIG. 1 shows a perspective view of a screw cap of a plastic screw cap according to the prior art in the closed position in front of the first opening.
  • Figure 2 shows a side view of a screw cap on a
  • the pouring spout of a bottle is screwed on before the first opening, a connecting element being arranged on the screw cap between a jacket wall and a guarantee strip.
  • Figure 3a shows a side view of a screw cap on a
  • FIG. 3b shows a perspective view of the screw cap according to FIG.
  • FIG. 3a shows the screw cap in the closed position
  • Figure 3c shows a screwed-on position of the screw cap according to
  • FIG. 3d shows a pivoted position of the in a side view
  • Screw cap relative to the tamper-evident band and the pouring spout of the bottle shows.
  • Figure 4a shows a side view of a semi-finished product
  • FIG. 4b shows a perspective view of the semi-finished product from FIG. 4a with a small gap between the screw cap edge and the tamper-evident band.
  • Figure 5a shows a side view of a semi-finished product
  • Screw cap with two partially parallel connecting elements whose
  • DLI-028-P-WO Guarantee band connecting webs are offset radially inward, whereby a cutting process can be carried out safely.
  • FIG. 5b shows a perspective view of the semi-finished product from FIG.
  • FIG. 6 shows a schematic side view of a screw cap, two connecting elements being arranged to run between a retaining ring and the guarantee strip.
  • FIG. 7a shows a side view of a plastic screw cap with pouring spout, cutting device and screw cap in the closed position before mounting on a cardboard container, while
  • FIG. 7b shows a side view of the plastic twist lock according to
  • Figure 7a shows in an unscrewed position, the screw cap being spaced from the tamper-evident band by the connecting elements and the cutting device partially exiting downwards.
  • Figure 7c shows an axial longitudinal section through one
  • a plastic screw cap 2 is presented here, which comprises a screw cap 20 that can be screwed onto a suitable pouring spout 22 on or on a container 1.
  • Various containers 1 with container walls made of different materials and material mixtures are known, which can be provided with such plastic rotary closures 2 produced by means of plastic injection molding.
  • plastic screw caps 2 for bottle-like containers 1 made of glass or plastic are shown in FIGS. 1 to 6, while analogous plastic screw caps for containers with single-layer walls or composite laminates are shown in FIGS. 7a to 7c.
  • the pouring spout 22 has a pouring spout wall with an external thread, to which the screw cap 20 can be fastened with an internal thread 204.
  • a retaining bead is formed on the outer wall of the pouring spout, which secures a tamper-evident band 21 attached to the screw cap 20 against linear displacement parallel to a longitudinal axis L of the plastic rotary closure 2.
  • the guarantee strip 21 can correspondingly rotate about the longitudinal axis L, but cannot be moved linearly parallel to the longitudinal axis L.
  • a collar 221 is formed on the pouring spout 22 and plays a role in the assembly of the plastic screw cap 2. All individual parts of the plastic screw cap 2 are manufactured in one piece by means of plastic injection molding.
  • the screw cap 20 has an upper cover wall 200 and a jacket wall 201 with the internal thread 204.
  • the jacket wall 201 runs into a screw cap edge 202 on the side facing away from the upper cover wall 200.
  • the guarantee strip 21 is temporarily on the jacket wall 201, for example via predetermined breaking point bridges
  • a connecting element 230 is arranged to run between the screw cap 20 and the guarantee strip 21.
  • the connecting element 230 has the shape of a plastic tape.
  • the screw cap 20 can be produced completely with the connecting element 230 and the guarantee strip 21 in an injection molding process.
  • the at least one connecting element 230 is accommodated at least partially in a screw cap niche 203 and a tamper-evident band niche 210.
  • the connecting element 230 lies in these niches 203, 210 at least in the closed position of the screw cap 20.
  • the at least one connecting element 230 is integrally formed on the remainder of the screw cap 20. It has a central web 232, which has an essentially constant wall thickness over its entire length and is arranged between the screw cap 20 and the guarantee strip 21 without any hinge or folds.
  • the connecting element 230 comprises a guarantee band connection web 231, starting from the guarantee band 21 and a
  • Screw cap edge connecting web 233 starting from the screw cap edge 202, the central web 232 being straight between the tamper-evident band connecting web 231 and
  • Screw cap edge connecting web 233 runs.
  • the central web 232 runs in a straight line and at least approximately parallel to the circumferential direction of the screw cap 20 between the screw cap edge 202 and an edge of the guarantee strip 21, with guarantee strip connecting webs 231 and
  • DLI-028-P-WO Screw cap edge connecting web 233 form transitions from the screw cap 20 to the central web 232.
  • the central web 232 runs at all times below the screw cap edge 202 or between the screw cap edge 202 and the free edge of the tamper-evident band 21.
  • the central web 232 runs completely in a straight line without hinge and folds within the niches 203, 210 at any time, in the closed position or screwed-on position, the at least one connecting element 230 is prevented from protruding in the radial direction towards the longitudinal axis L or away from the longitudinal axis L and away from the jacket wall 201.
  • the central web 232 here runs at least approximately parallel to the screw cap edge 202, both niche heights of the screw cap niche 203 and the tamper-evident band niche 210 being selected to be approximately the same and the central web 232 running approximately half in each of the two niches 203, 210.
  • only one connecting element 230 is selected, the thickness of which is made correspondingly large, so that a high tensile force can act on this connecting element 230.
  • the thickness or wall thickness of the central web 232 is preferably selected to be as great as the wall thickness of the jacket wall 201 or slightly thicker.
  • the connecting element 230 preferably protrudes in the radial direction, that is to say perpendicular to the longitudinal axis L of the screw cap 20, not beyond the cross section of the screw cap rim 202 or the screw cap 20. As a result, a tool for fastening the plastic screw cap on a bottle neck cannot undesirably get stuck on the connecting element 230.
  • FIG. 3a a screw cap 20 is shown screwed onto a pouring spout in a closed position.
  • tape niches 210 and screw cap niches 203 are guarantee in each case
  • the guarantee strip 21 and the screw cap edge 202 are cut out, with two connecting elements 230, 230 'being molded on.
  • the connecting elements 230, 230 ' are manufactured in one piece by means of injection molding and each run from a guarantee strip connecting web 231, 231' via a central web 232, 232 'to one
  • Screw cap edge connecting web 233, 233 ' Screw cap edge connecting web 233, 233 '.
  • the positioning and direction of the connecting elements 230, 230 ' corresponds to the embodiment with a connecting element 230.
  • the connecting element 230, 230' which is made as thick as possible, extends in the radial direction without a protrusion.
  • the central webs 232, 232 'with constant thickness in the radial direction run parallel to the circumferential direction of the screw cap 20 or parallel to the screw cap edge 202.
  • the thickness in the radial direction corresponds approximately to the thickness of the jacket wall 201 and the central webs 232, 232' are kink-free and hinge-free designed to run in a straight line. Kinks or deflection strips weaken the central web 232, 232 'too much.
  • Securing means 25 are optionally arranged here on the guarantee strip 21 and the screw cap edge 202, which prevents the screw cap 20 from being unscrewed in an undesired manner.
  • the engagement of the internal thread 204 in the external thread of the pouring spout 22 results in a linear movement of the screw cap 20 in the direction of the longitudinal axis L relative to the pouring spout 22.
  • the screw cap rim 202 is detached from the guarantee strip 21 and, thanks to the flexibility of the connecting elements 230, 230 ', the screw cap 20 be moved linearly. In this screwing position or
  • the closed position of the screw cap 20 is indicated in a screwed-on position according to FIG. 3c.
  • the screw cap 20 can then be folded away from the pouring spout 22. This folding away or pivoting is about an axis which, according to FIG. 3d, is directed perpendicularly into the plane of the paper.
  • the connecting elements 230, 230 ′ are designed in the form of a strip and the individual webs are molded onto one another and onto the guarantee strip 21 and the screw cap edge 202. Even if the central webs 232, 232 'are designed to be free of kinks and hinges, a
  • Spout wall 222 and the external thread 223 take place.
  • the material for all components of the screw cap 20 is identical and must be processable by means of injection molding.
  • DLI-028-P-WO of the jacket wall 201 protrude perpendicularly from the longitudinal axis L from the screw cap edge 202.
  • FIGS. 4a and 4b a semi-finished product of a screw cap 20 is shown after it has been removed from the injection molding machine.
  • a small distance between the screw cap edge 202 and the screw cap edge 202 opposite free edge of the guarantee strip 21 can be seen here.
  • the two connecting elements 230, 230 ′ are shown running parallel to one another, slightly inclined to the direction of rotation or to the screw cap edge 202.
  • the semi-finished product of the screw cap 20 is pressed onto a pouring spout 22, the screw cap 20 being compressed as shown in FIG. 3a.
  • Screw cap 20 shown after removal from the injection molding machine. There is no gap between the guarantee strip 21 and the screw cap edge 202, but the guarantee strip 21 is at least partially removed after the injection molding process with a cutting device along a cutting line indicated by dashed lines
  • Screw cap edge 202 separated.
  • the cutting device is symbolized in Figure 5a by dashed cutting. In some places the guarantee strip 21 and the screw cap edge 202 remain connected to one another,
  • the connecting elements 230, 230 ′ or the central webs 232, 232 ′ are arranged offset from the line of intersection in the direction of the upper cover wall 200.
  • the cutting device can be guided between the central web 232, 232 ′ and the free edge of the guarantee strip 21. Damage to the connecting elements 230, 230 'is then not possible. Only one screw cap rim niche 203 is cut out here, in which the connecting elements 230, 230 'run. But the course of the connecting elements 230, 230 'in the screw cap niche 203 and the tamper-evident band niche 210 would also be possible
  • Guarantee band connecting webs 231, 231 ' can be designed to be offset radially inwardly in the direction of the screw cap center point, in particular by means of a fold, kinks or a loop formation.
  • the tamper-evident band connecting web 231, 231 'then projects radially inward.
  • the guarantee strip connecting webs 231, 231 'thus each have a set-back area. In such an embodiment, the cutting process can take place without problems and without risk. Only connection points between the guarantee strip 21 and the screw cap edge 202 are separated.
  • the at least one connecting element 230 is set back in its course in the at least one recessed area of the folded tamper-evident band connecting web 231, 231 'in the radial direction, i.e. perpendicular to the longitudinal axis L relative to the tamper-evident band 21 and / or the screw cap edge 202.
  • the connecting elements 230, 230 ' are correspondingly further away from the cutting device. The undesired severing of the connecting elements 230, 230 'is thus prevented.
  • the cutting device cuts the semi-finished product at least partially in an additional work step between the guarantee strip 21 and the screw cap rim 202 without danger.
  • Screw cap edge connecting web 233 can nevertheless be made of the same thickness. A thickness of the webs which corresponds to the wall thickness of the jacket wall 201 is sufficient.
  • the screw cap 20 has all of the features already explained, in particular the at least one connecting element 230, 230 ', and is manufactured entirely by means of injection molding.
  • a retaining ring R forming part of the screw cap 20, is arranged at least partially around the jacket wall 201.
  • the retaining ring R is designed to be endless here and completely surrounds the screw cap 20 or the jacket wall 201.
  • a retaining ring niche r is cut out in retaining ring R, which takes on the function of screw cap niche 203 of the other embodiments.
  • the retaining ring R is created in the same injection molding process as the rest of the screw cap 20.
  • the retaining ring R is over
  • Predetermined breaking point bridges are injection-molded at a distance from the jacket wall 201.
  • the connecting elements 230, 230 ′ are held indirectly on the screw cap 20 by the retaining ring R.
  • An annular recess 205 and a circumferential projection 206 are provided on the screw cap wall 202.
  • a semi-finished product of a screw cap 20 is designed after removal from the injection molding device in such a way that the retaining ring R is not yet mounted in the annular recess 205 and there is a distance between the retaining ring R and the guarantee strip 21.
  • the screw cap 20 is then upset, the retaining ring R being inserted into the annular recess 205. This can be done in a further work step, after the injection molding process and after removing the semi-finished product.
  • the retaining ring R can be inserted into the ring recess 205 after the injection molding process and when the injection molded part is ejected from the tool. Then the mounting of the retaining ring R in the ring recess 205 takes place during the ejection by appropriate shaping of the tool or the injection molding machine.
  • the connecting elements 230, 230 ′ lie between the retaining ring R and the free edge of the guarantee strip 21 when the screw cap is in the closed position and in the open position.
  • the annular recess 205 is arranged and so that the retaining ring R is also protected, a projection 206 is molded or injected onto the jacket wall 201.
  • the plastic screw cap 2 comprises the screw cap 20, the guarantee strip 21, the spout 22 and a flange 221 instead of the collar 221.
  • the screw cap 20 has all the features already explained and is also manufactured by injection molding.
  • Such plastic screw caps 2 are suitable for mounting on containers 1 made of laminates and, as also shown, have additional cutting devices 24, which are embedded in the interior of the pouring spout 22 and are still hidden inside before the first opening.
  • Cutting devices 24 are known and here have an external thread 240 which can be operatively connected to an internal thread 225 in the pouring spout wall 222. With at least one driver 243 molded onto the cutting device 24, the cutting device 24 can be rotated after engagement of the drivers 209 on the screw cap 20.
  • the cutting device 24 has a cutting edge 241 on which a plurality of cutting teeth 242 are arranged. Since all components can be manufactured by means of plastic injection molding, it is advantageous to create a semi-finished product of the plastic screw cap 2 according to FIG. 7a with screw cap 20, pouring spout 21, guarantee strip 22, connecting element 23 and cutting device 24 manufactured in one piece in an injection molding process or a tool.
  • securing means 25 are arranged in the screw cap 20 and the guarantee band 21, which can be effectively connected when the screw cap 20 is in the closed position and connected to the guarantee band 21.
  • webs are formed in the guarantee strip 21, which are arranged standing along the circumference approximately parallel to the longitudinal axis L in the direction of the screw cap 20. Corresponding recesses are along the
  • DLI-028-P-WO Screw cap edge 202 arranged. These components form the securing means 25, it also being possible for the positions of the recesses and the webs to be interchanged. If a retaining ring R is molded on, the securing means 25 are accordingly located in or on the retaining ring R and the guarantee strip 21.
  • the total length of the at least one connecting element 230, 230 'or the central web 232, 232' must have a minimum size.
  • the length of the central webs 232, 232 ′ of the at least one connecting element 230, 230 ′ should preferably be greater than a height 2040 of the internal thread 204.
  • Screw cap edge connecting webs 233, 233 ' is the same size. This is inevitably not possible if the tamper-evident band connecting web 231, 231 'has folds or is formed in loops.
  • predetermined breaking point bridges can be arranged between the connecting elements 230, 230 ′ and the guarantee strip 21 and / or the screw cap rim 202 and / or the retaining ring R.
  • Connecting elements 230, 230 ′ each have an invariable inclination in a direction parallel to the longitudinal axis L.
  • the tamper-evident band connecting webs 231, 231 ' are partially at least approximately aligned with the wall of the tamper-evident band 21 and the screw cap edge connecting webs 233, 233' are partly designed at least approximately aligned with the jacket wall 201 or the wall of the retaining ring R. This applies to all screwing states of the screw cap 20.
  • the connecting elements 230, 230 ' run completely between the screw cap edge 202 or an edge of the retaining ring R and the free edge of the guarantee strip 21 and are thus integrated into the screw cap 20.
  • the guarantee band connection webs 231, 231 'and the screw cap edge connection webs 233, 233' form transitions from the screw cap 20 or the retaining ring R and the guarantee band 21 to the central web 232, 232 '.
  • the central web 232, 232 ' is arranged to run in a straight line in the direction of the circumference of the screw cap edge 202 or the guarantee strip 21 in the circumferential direction.
  • Screw cap edge connecting webs 233, 233 ' The central web 232, 232 'is solely pivotable about a pivot axis, which is approximately
  • DLI-028-P-WO runs perpendicular to the longitudinal axis L through the central web 232, 232 '.
  • the central web 232, 232 ' remains essentially straight in every position of the screw cap 20, the guarantee strip connecting webs 231, 231' and the screw cap edge connecting webs 233, 233 'being bent.
  • the minimum thickness of all parts of the connecting elements 230, 230 ′ is preferably as large as the wall thickness of the jacket wall 201 of the screw cap 20.

Landscapes

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

Abstract

L'invention concerne un bouchon à vis (20) d'une fermeture rotative (2) en matière synthétique, ledit bouchon à vis comprenant une paroi supérieure (200), une paroi latérale (201), un filetage intérieur (204) et un bord de bouchon à vis (202), une bande de garantie (21) étant disposée en face du bord de bouchon à vis (202) et au moins un élément de liaison (230) pourvu d'une nervure de liaison de bande de garantie (231), d'une nervure centrale (232) et d'une nervure de liaison de bord de capuchon à vis (233) étant disposé entre la bande de garantie (21) et une niche de bouchon à vis (203) ou une niche de bague de retenue de manière à être fixé de façon inamovible à une bague de retenue en étant caché par le bord de bouchon à vis (202). L'au moins un élément de liaison ne doit jamais faire saillie radialement du bord du bouchon à vis, même après un vissage et dévissage répétés. Ce but est atteint en ce que l'au moins un élément de liaison (230) s'étend d'une seule pièce, avec sa nervure centrale (232) de conception rectiligne sans charnière et sans plis dans la position fermée du bouchon à vis (20) au moins approximativement parallèlement à la direction circonférentielle du bouchon à vis (20) entre le bord de bouchon à vis (202) et le bord libre de la bande de garantie (21), entre la nervure de liaison de bande de garantie (231) et la nervure de liaison de bord de bouchon à vis (233).
EP20705702.7A 2019-03-04 2020-02-17 Fermeture rotative en matière synthétique comprenant au moins un élément de liaison Pending EP3934993A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00257/19A CH715900A2 (de) 2019-03-04 2019-03-04 Schraubkappe und Kunststoffdrehverschluss mit einer Schraubkappe und einem Ausgussstutzen sowie mindestens einem Verbindungselement zur unverlierbaren Befestigung der Schraubkappe am Ausgussstutzen.
PCT/EP2020/054102 WO2020178012A1 (fr) 2019-03-04 2020-02-17 Fermeture rotative en matière synthétique comprenant au moins un élément de liaison

Publications (1)

Publication Number Publication Date
EP3934993A1 true EP3934993A1 (fr) 2022-01-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20705702.7A Pending EP3934993A1 (fr) 2019-03-04 2020-02-17 Fermeture rotative en matière synthétique comprenant au moins un élément de liaison

Country Status (3)

Country Link
EP (1) EP3934993A1 (fr)
CH (1) CH715900A2 (fr)
WO (1) WO2020178012A1 (fr)

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WO2010004919A1 (fr) 2008-07-08 2010-01-14 日本クラウンコルク株式会社 Couvercle de contenant en résine synthétique
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