Top cover comprising projection guide ramp

Abstract

The invention relates to an assembly comprising a threaded neck (10) of a container (12) and a cap mounted on the neck (10), the cap comprising a breakable bridge connecting the cap body to a tamper-resistant ring and designed to certainly break during a first opening of the cap, the assembly being characterized in that the cap is fastened to the tamper-resistant ring, the cap being fastened to the tamper-resistant ring, the cap being fastened to the tamper-resistant ring, and the cap being fastened to the tamper-resistant ring, the cap being fastened to the tamper-resistant ring, the cap being fastened to the tamper-resistant ring and being fastened to the tamper-resistant ring. The invention relates to a tamper-resistant ring (10) comprising a cap (20) comprising at least one projection formed to project from the inside of the tamper-resistant ring, the tamper-resistant ring comprising at least one guide portion (30) inclined with respect to a plane perpendicular to the axis of rotation (R) and forming a ramp (30) configured to come into contact with the projection during the first opening of the cap, therefore, the protruding part is axially guided, so that at least one easy-to-break bridge connecting part in the easy-to-break bridge connecting parts is broken.

Description

Technical Field

[0001] The invention relates to an assembly comprising a container having a threaded neck and a cap intended to close the container. Background Art

[0002] As is well known, containers (such as bottles) with threaded necks can be provided with necks, on which plastic caps can be screwed. The term "container" herein refers to any type of container, without limiting shape or purpose. In particular, the cap comprises a main body and a thread, the main body defining a space for receiving the neck of the bottle, the thread being adapted to cooperate with the threaded neck to close the neck of the container. Typically, the cap also comprises an anti-tampering ring designed for engaging the neck bearing surface. The anti-tampering ring is particularly connected to the cap main body by a frangible bridge, with a separation structure extending therethrough between the frangible bridge. Therefore, when the cap is opened, the anti-tampering ring remains attached to the neck by the bearing surface and is disengaged from the main body by rupturing the frangible bridge, thereby indicating to the user that the cap has been opened for the first time.

[0003] In order to meet the new climate challenges, the new European directive introduced a new standard that requires that when the cover is opened, the different parts of the cover, in particular the body and the tamper-proof ring, remain inseparable. We call these covers "inseparable covers".

[0004] Some containers such as cardboard boxes have a membrane extending into the opening which must be broken when the lid is opened using an intermediate device called a piercer. The lid then includes a mechanism for activating the piercer which is opened when the user first unscrews the lid.

[0005] In an inseparable cap, the breaking of the frangible bridge may be complicated by the narrowness of the grip on the cap body, making it difficult for the user to do so. In addition, existing systems for separating the frangible bridge may be complex to manufacture, thereby increasing the production cost of such inseparable caps.

[0006] For assemblies that include a membrane piercing mechanism such as a piercer, the user must be able to reliably determine by sight whether the membrane has been pierced, particularly when the cap has previously been rotated slightly but enough to damage the membrane.

[0007] It is therefore an object of the present invention to provide a non-detachable cover which is simple to manufacture and easy to use for the consumer and which, among other things, allows the frangible bridge to be broken in an optimal manner. In addition, the present invention provides a cover which, after being rotated a few degrees for the first time, reliably and clearly indicates when it has been opened for the first time. Summary of the invention

[0008] The present invention provides an assembly comprising a threaded neck of a container and a cap mounted on the neck for closing the container, the threaded neck and the cap extending around a rotation axis, the neck comprising:

[0009] - opening;

[0010] - at least one helical thread formed on the outer surface of the neck;

[0011] - a bearing surface configured to axially retain the tamper-proof ring of the cap;

[0012] The top cover includes:

[0013] - a cylindrical cap body centered on the axis of rotation and comprising at least one helical rib designed to engage the helical thread of the neck;

[0014] - an anti-tamper ring centered on the longitudinal axis;

[0015] - a frangible bridge connecting the closure body to the tamper-evident ring and designed to break permanently when opened for the first time; and

[0016] - at least one articulated connection member for connecting the tamper-evident ring and the body to each other independently of the first opening of the cover;

[0017] at least one ear which projects from the inside of the tamper-evident ring and which will axially abut against the bearing surface of the neck when the cap is opened for the first time;

[0018] The assembly is characterized in that the top cover includes at least one protrusion, which is formed to protrude from the inner side of the tamper-proof ring and is axially offset relative to the ear, and the support surface includes at least one guide portion, which is inclined relative to a plane perpendicular to the rotation axis and forms a ramp, and the ramp is configured to contact the protrusion when the top cover is opened for the first time so as to axially guide the protrusion to break at least one of the breakable bridges.

[0019] According to other features of the present invention:

[0020] the neck comprises a membrane extending into the opening, the cap comprises at least one intermediate member participating in the rupture of the membrane when the cap is first opened, the assembly being configured so that at least one of the frangible bridges ruptures before the membrane is pierced;

[0021] - the bearing surface has a second inclination angle of between 20° and 50° relative to a plane perpendicular to the axis of rotation;

[0022] - the bearing surface forms a shoulder on the outer surface of the neck so that the bearing surface faces away from the helical thread;

[0023] - the projection is formed radially opposite to the articulated connection member;

[0024] - the tamper-proof ring comprises a tab extending axially towards the top cover body, the protrusion being formed on the inner side of the tamper-proof ring at the tab;

[0025] the projection comprises a bearing surface designed to come into contact with a bearing surface of the neck, the bearing surface having a profile inclined relative to a plane perpendicular to the axis of rotation;

[0026] - the bearing surface extends radially to the outer surface of the neck at a first inclination angle between 90° and 120°;

[0027] the bearing surface comprises two guide portions forming ramps extending in mirror image of one another in an axial plane and in such a way that the free ends of each of the ramps extend at a non-zero first distance from one another, the free ends delimiting a channel without bearing surfaces in order to facilitate the positioning of the lug when the cap is mounted on the neck;

[0028] The bearing surface comprises at least one main portion from which the at least one guide portion extends, the main portion extending in a plane substantially perpendicular to the axis of rotation and extending substantially over the entire circumference of the neck without the guide portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features and advantages of the present invention will become apparent from the following detailed description, which can be read with reference to the accompanying drawings, in which:

[0030] Figure 1 is a perspective view of a threaded neck of a container adapted to receive an overcap according to the present invention and including a bearing surface;

[0031] Figure 2 According to the first example of the present invention Figure 1 A close up view of the bearing surface of the threaded neck is shown;

[0032] Figure 3 According to the second example of the present invention Figure 1 A close up view of the bearing surface of the threaded neck is shown;

[0033] Figure 4 is a perspective view of a top cover according to the present invention, showing a Figure 1 the space at the neck of the container as shown;

[0034] Figure 5 yes Figure 4 a perspective view of the top cover shown, showing the tamper-proof ring with tabs;

[0035] Figure 6 is a close up view of the protrusions protruding from the tamper-proof ring;

[0036] Figure 7 is a schematic diagram of the top cover mounted on the neck in an initial closed state;

[0037] Figure 8 is a schematic diagram of the top cover mounted on the neck and rotated by an angle C;

[0038] Fig. 9 is a schematic diagram of a top cover mounted on a neck and rotated by an angle G;

[0039] Fig.10 yes Fig. 9 A schematic side view of the top cover is shown;

[0040] Fig.11 is an exploded view of a container comprising a membrane covering an opening, a piercer, a neck of a cap and a cap comprising an opening member intended to cooperate with the piercer. DETAILED DESCRIPTION

[0041] In the following description, the same, similar or like elements will be referred to by the same reference numerals.

[0042] Figure 1 A threaded neck 10 of a container 12 is shown which is intended to be used with Figures 4 to 9 A cap 14 , which can be seen in the drawing, is engaged so as to close the opening 16 of the neck 10 of the container 12 .

[0043] According to Fig.11 In the example of the invention shown, when the container 12 is a cardboard box, the membrane 13 may extend into the opening 16. The membrane 13 may be made of aluminum and forms an inner layer of the container 12 which must be broken at the neck 10 when the top cover 14 is first opened by an intermediate member 15 called a piercer 15.

[0044] More precisely, in this example of the invention, the top cover 14 comprises an opening member 63 that cooperates with the piercer 15 when the top cover 14 is rotated, so that the piercer 15 breaks the membrane 13 when the top cover 14 is first opened. Even more precisely, the piercer 15 comprises an external thread that cooperates with the internal thread of the neck 10, so that the piercer 15 can be moved towards the membrane 13 under the action of the opening member 63 of the top cover 14 that cooperates with the piercer 15. According to one example of the invention, relative to Figure 7The closed position of the top cover 14 visible in FIG. 1 is such that the top cover 14 is rotated at least through an angle between 30° and 60° about the rotation axis R of the neck 10 , so that the piercer 15 ruptures the membrane 13 .

[0045] Figure 1 The neck 10 of the container 12 shown has a cylindrical shape about its rotation axis R and defines an opening 16 through which liquid can flow into or out of the container 12. The neck 10 of the container 12 includes at least one helical thread 18 formed on an outer surface 20 of the neck 10. In particular, the at least one helical thread 18 protrudes from the outer surface 20 of the neck 10. In the remainder of this specification, the portion of the neck 10 with the helical thread 18 will be referred to as the middle portion 22.

[0046] The neck 10 of the container 12 also includes Figures 1 to 3 At least one bearing surface 24 visible in the drawing is configured to be axially retained on the Figure 4 Visible in FIG. 1 is a tamper-evident ring 26 of the top cover 14 , which and its cooperation with the support surface 24 will be described in detail later in this specification.

[0047] The bearing surface 24 extends radially around the outer surface 20 of the neck 10. Furthermore, the bearing surface 24 extends at least partially around the outer surface 20 of the neck 10 along the axis of rotation R.

[0048] In particular, it should be appreciated that the bearing surface 24 projects from the outer surface 20 of the neck 10 .

[0049] The bearing surface 24 also has a first inclination angle A relative to the outer surface 20 of the neck 10, which is Figure 2 It is visible between 90° and 120°.

[0050] refer to Figure 2 , defining a main portion 28 of the bearing surface 24 and a guide portion 30 extending the main portion 28. According to this illustrated example of the invention, the main portion 28 is characterized in that it extends in a common plane perpendicular to the axis of rotation R of the top cover 14.

[0051] The guide portion 30 extends in a plane that intersects a common plane in which the main portion 28 of the bearing surface 24 lies, so that the guide portion 30 forms a guide ramp 30. The guide portion 30 of the bearing surface 24 then extends axially towards the helical thread 18.

[0052] A second inclination angle B of the guide portion 30 is defined relative to a plane perpendicular to the rotation axis R, the inclination angle B being between 20° and 50°.

[0053] according to Figures 1 to 3In the embodiment shown, the bearing surface 24 is shaped to form a shoulder 32 in the outer surface 20 of the neck. In other words, the bearing surface 24 protrudes from the outer surface 20 of the neck 10 in this example of the invention.

[0054] In this way, the bearing surface 24 helps to separate the middle portion 22 of the neck 10 of the cap 14 from the base portion 34 of the neck 10 axially opposite the middle portion 22. In other words, the base portion 34 and the middle portion 22 of the neck 10 extend axially on either side of the bearing surface 24.

[0055] The base portion 34 of the neck 10 is designed to receive at least a portion of the aforementioned tamper-evident ring 26 of the cap 14 .

[0056] The bearing surface 24 forming the shoulder 32 of the outer surface 20 thus faces away from the helical thread 18 of the middle portion 22 of the neck, ie towards a base portion 34 of the neck 10 designed to receive the tamper-proof ring 26 of the cap 14 .

[0057] This arrangement of the bearing surface 24 forming the shoulder 32 ensures optimal strength of said bearing surface 24, in particular when it comes into contact with the tamper-proof ring 26. In other words, the bearing surface 24 formed by the shoulder 32 on the outer surface 20 provides optimal resistance to the axial pressure exerted by the tamper-proof ring 26 when the cap is first opened.

[0058] According to Figure 1 and Figure 3 In one embodiment of the invention, which can be seen in particular in FIG. 2 , the bearing surface 24 comprises two guide portions 30 forming ramps 30 extending in mirror image of one another along an axial plane of the top cover 14 .

[0059] According to this example of the invention, the two guide portions 30 extend at a non-zero first distance D1 from each other, the first distance D1 extending along the periphery of the outer surface 20 of the neck 10 around the axis of rotation R. In other words, each of the guide portions 30 comprises a free end 36 extending at a non-zero first distance D1 from each other. In other words, the bearing surface 24 may be discontinuous.

[0060] This non-zero first distance D1 between the free ends 36 of the guide portions 30 is advantageous when mounting the cap on the neck 10, the advantages of which will be described in detail later in the description.

[0061] In addition, if Figure 1As shown, the helical thread can be axially undercut in accordance with the spacing between the two free ends 36 of the guide portion 30 to facilitate the assembly of the cap on the neck as described above. In other words, the material gap of the helical thread and the spacing between the two free ends 36 of the guide portion 30 are formed on the same angular portion.

[0062] According to Figure 3 In the embodiment of the invention visible in FIG. 1 , the guide portions 30 of the bearing surface 24 are connected to each other by an additional portion 38. The additional portion 38 extends substantially in a plane perpendicular to the axis of rotation R of the top cover 14. It should be understood that the additional portion 38 connects the two guide portions 30 at their free ends 36.

[0063] According to one embodiment of the invention, the neck 10 of the cap 14 comprises a platform 40 extending radially around the outer surface 20 of the neck 10 along the axis of rotation R. The platform 40 is a substantially flat surface designed to cooperate with the container 12. Thus, according to this example of the invention, the base portion 34 of the neck 10 is axially delimited by the bearing surface 24 and the platform 40.

[0064] Now we will use Figures 4 to 6 The top cover 14 is described in more detail.

[0065] Top cover 14 is made of plastic material such as polypropylene or high density polyethylene. Such plastic top cover is then manufactured by molding, for example, by injection into a mold.

[0066] The top cover 14 extends around the rotation axis R and has a substantially cylindrical shape. It should therefore be understood that when the top cover 14 is closed Figure 1 When the opening 16 of the neck 10 of the container 12 is visible in FIG. 1 , the axis of rotation R is the same for the cap 14 and the neck 10 of the container 12 .

[0067] The cap 14 comprises at least one cap 14 body 42 centered on the rotation axis R, which defines a space 44 for receiving the neck of the container.

[0068] More specifically, the main body 42 of the top cover 14 includes at least one peripheral skirt 46 having a right cylindrical shape relative to the rotation axis R of the top cover 14 and extending from the periphery of a plate 48 oriented perpendicular to the rotation axis R of the top cover 14. It should be understood that when the top cover 14 is arranged Figure 1 When the top cover 14 is placed on the neck 10 of the container 12 , the plate 48 of the top cover 14 is arranged to overlap with the opening 16 of the neck 10 of the container 12 .

[0069] According to the illustrated embodiment of the present invention, an indentation 50 is formed on an outer surface 52 of the peripheral skirt 46 radially opposite the receiving space 44 to enable a user to better grip the body 42 of the cap 14 when opening or closing the cap 14 .

[0070] According to the illustrated example of the invention and in a non-limiting manner, the indentations 50 have an oval shape protruding from the outer surface 52 of the peripheral skirt 46 and extend along a plurality of straight lines at least partially parallel to the axis of rotation R of the top cover 14 .

[0071] The main body 42 of the top cover 14 also includes Figure 4 At least one helical rib 54 is visible in the neck 10, and extends into the receiving space 44 defined by the body 42. More precisely, the helical rib 54 protrudes from the inner surface 56 of the peripheral skirt 46 opposite its outer surface 52. It should therefore be understood that the helical rib 54 is shaped in a manner complementary to the shape of the helical thread 18 on the neck 10, as previously described. Figure 1 This complementary shape between the helical rib 54 and the helical thread 18 enables the cap 14 to be screwed on and off by a rotational movement about its rotation axis R, thereby sealing or releasing the opening of the container neck.

[0072] According to the illustrated embodiment, the cap 14 also includes the aforementioned tamper-evident ring 26 centered about the axis of rotation R of the cap 14 .

[0073] In particular, the tamper-evident ring 26 is arranged as an extension of the peripheral skirt 46. The frangible bridge 58 then extends between the main body 42 of the cap 14 and the tamper-evident ring 26 to connect the two before the cap 14 is opened for the first time.

[0074] More specifically, the frangible bridge 58 extends between a free side 60 of the peripheral skirt 46 and the tamper-evident ring 26 .

[0075] The frangible bridge 58 is thus configured to break when the cover 4 is opened for the first time.

[0076] According to one embodiment of the present invention, the tamper-evident ring 26 includes a tab 62 that extends axially toward the peripheral skirt 46 of the body 42 of the cap 14 .

[0077] It should be remembered that the tab 62 has a substantially circular shape at one free end edge, but such a shape is not exclusive, as the tab 62 may take any other shape, such as a trapezoid, and such a shape is within the scope of the present invention.

[0078] As can be understood from the above, when the top cover 14 is installed on Figure 1When positioned over the neck 10 of the container 12 as shown in FIG. 1 , the peripheral skirt 46 of the main body 42 of the cap 14 extends around the middle portion 22 of the neck 10 , and the tamper-evident ring 26 extends around the base portion 34 of the neck 10 .

[0079] According to Figure 4 In one embodiment of the present invention, the top cover comprises the aforementioned opening member 63, which helps to break the film extending into the opening by cooperating with the piercer. According to one example of the present invention, rotating the top cover at an angle between 30° and 60° around the rotation axis R will cause the film to break.

[0080] The top cover 14 also includes at least one hinged connection member 64 designed to connect the tamper-evident ring 26 and the body 42 to each other independently of the first opening of the top cover 14 (i.e., before and after the top cover 14 is first opened). Figure 4 Two articulated connecting members 64 can be seen in FIG.

[0081] At least one articulated connection member 64 is in the form of a hinge and ensures that the body 42 pivots relative to the tamper-proof ring 26 when the top cover 14 is opened. The connection member 64 also includes a stop member 66 designed to abut against the helical thread so as to lock the body 42 of the top cover 14 to the tamper-proof ring 26 at a predetermined angle when the top cover 14 is opened. This retention of the body 42 of the top cover 14 relative to the tamper-proof ring 26 facilitates the user to use the top cover 14.

[0082] The cap 14 comprises at least one ear 68 which projects from the inside 70 of the tamper-proof ring 26 and will axially abut against the aforementioned bearing surface 24 of the neck 10 when the cap 14 is opened for the first time.

[0083] Thus, when the top cover 14 is first opened, such ears 68 help to retain the tamper-evident ring 26 around the base portion 34 of the neck 10, thereby also retaining the body 42 of the top cover 14 on the neck 10 at least by the breakable bridge before the top cover is first opened, and retaining it on the neck 10 by the connecting member 64 after the top cover is first opened.

[0084] The cap 14 also includes at least one projection 72 that projects from the inner side 70 of the tamper-evident ring 26 and is axially offset from the ear 68. Axially offset means that the projection 72 is axially closer to the body 42 of the cap 14 than the ear 68.

[0085] According to the example of the invention, in which the tamper-proof ring 26 includes the tab 62, a projection 72 is formed to protrude from the inner side 70 of the tamper-proof ring 26 at the tab 62. This facilitates the axial displacement of the projection 72 relative to the ear 68.

[0086] According to the foregoing, when the cap 14 is first opened, the projection 72 is designed to come into contact with the ramp 30 formed by the guide portion 30 of the bearing surface 24 of the neck 10 .

[0087] In addition, at least one main frangible bridge 58a is defined as a frangible bridge 58 extending directly on either side of the tab 62 and extending between the tab 62 and the frangible bridge 58a. Figures 7 to 10 In other words, the main frangible bridge 58a corresponds to the frangible bridge 58 that extends around the tab 62 and therefore around the protrusion 72, or directly between the tab 62 and the body 42 of the top cover 14. In the illustrated example of the invention, the top cover 14 includes two main frangible bridges 58a arranged on either side of the tab 62.

[0088] It should therefore be understood that when the top cover 14 is first opened, the rotating top cover 14 body 42 will cause the protrusion 72 formed on the tamper-proof ring 26 to rotate, contacting the ramp 30 formed by the guide portion 30 of the support surface 24, causing the guide portion 30 to axially displace the protrusion 72 in a direction away from the helical thread 18.

[0089] In other words, when the cap is first opened, the guide ramp formed by the guide portion 30 of the bearing surface 24 is intended to guide the projection 72 to the main portion 28 of said bearing surface 24. As mentioned above, the inclined profile of the guide ramp 30 enables the projection 72 to be axially guided away from the helical thread 18 of the neck 10.

[0090] This axial displacement of the projection 72 increases the axial distance between the tamper-evident ring 26 and the main body 42 of the cap 14, thereby generating tension on at least one of the primary frangible bridges 58a, which in turn causes it to break.

[0091] In fact, it should be considered that during the axial displacement of the protrusion 72, the tamper-proof ring 26 of the top cover 14 will first be axially displaced only at the tab 62, so that the tamper-proof ring 26 partially extends in a plane inclined relative to a plane perpendicular to the rotation axis R, as shown in FIG. Fig.10 Therefore, it should be understood that during axial displacement of the projection 72, initially only at least one of the primary frangible bridges 58a breaks.

[0092] According to one example of the present invention, when the top cover 14 is relative to the Figure 7 The closed position of the top cover 14 can be seen in Figure 8When the cover 14 is rotated about an angle C between 5° and 10°, as can be seen in FIG. 1 , the projection 72 will come into contact with the ramp 30 of the bearing surface 24, and when the cover 14 is rotated about the rotation axis R about an angle G between 10° and 30° relative to the closed position of the cover 14, the projection will be axially displaced by the ramp 30, as shown in FIG. Fig. 9 shown.

[0093] It should therefore be understood that when the top cover 14 is rotated at an angle G between 10° and 30° about the rotation axis R relative to the closed position of the top cover 14, at least one main frangible bridge 58a breaks, so that this break precedes the breakage of the above-mentioned membrane and occurs when the top cover 14 is rotated at an angle between 30° and 60° about the rotation axis R.

[0094] Such a feature is advantageous because it reliably visually indicates to the user that the membrane has been damaged, thereby indicating that the container has been opened once.

[0095] In other words, during rotation of the body 42 of the cap 14 at an angle G between 10° and 30° about the rotation axis R, the rupture of at least one main frangible bridge 58a reliably indicates to the user that the membrane has ruptured, even if the rotation of the cap does not exceed 60°. In this way, even if the cap is only partially rotated, it is reliably indicated to the user that the membrane has ruptured.

[0096] The protrusion 72 is defined to have a major extension dimension L (hereinafter referred to as the major dimension L of the protrusion 72 ), taken along the circumference of the tamper-proof ring 26 about the rotation axis R, between 1 mm and 5 mm.

[0097] As previously in Figure 1 As mentioned in , according to an advantageous embodiment of the cap 14, the main dimension L of the projection 72 is less than the first distance D1 between the two guide portions 30 of the bearing surface 24. This feature makes it easier to install the cap 14 on the neck 10 by providing clearance for the projection 72 to translate axially along the outer surface 20 of the neck 10.

[0098] The projection also has a thickness P, measured along a straight line parallel to the radial axis of the top cover 14, between 0.4 mm and 1.2 mm. Such a thickness P corresponds to the maximum thickness of the projection 72 taken between the two points on the projection 72 that are radially farthest apart. Among other things, such a thickness P of the projection 72 enables the projection to engage against the end edge of the bearing surface 24 and be guided by the guide portion 30 forming the guide ramp 30.

[0099] The bearing surface 74 of the projection is defined to be in contact with the end edge of the bearing surface 24 of the neck 10. In particular, the bearing surface 74 faces the helical rib 54 of the cap 14.

[0100] According to the illustrated embodiment of the invention, the bearing surface 74 has an inclined profile relative to a plane perpendicular to the axis of rotation R of the top cover 14 .

[0101] In other words, the bearing surface 74 of the projection 72 forms a chamfered angle of attack of said projection 72. Such a configuration of the bearing surface 74 improves, among other things, its guidance and sliding relative to the end edge of the bearing surface 24.

[0102] Figures 1 to 11 The method for opening the top cover 14 for the first time will now be described in detail.

[0103] When the cover 14 is first opened, the consumer grasps the cover 14 at the body 42, and the indentations 50 formed thereon assist in grasping.

[0104] The consumer may then rotate the body 42 of the cap 14 attached to the tamper-evident ring 26 at least by the frangible bridge 58 , thereby rotating the tamper-evident ring 26 .

[0105] This defines the body 42 relative to the Figure 7 The initial closed position of the top cover 14 is shown in FIG. Figure 8 The first rotation of the axis of rotation R by an angle C can be seen in FIG.

[0106] The rotation angle C of the cover then causes, on the one hand, the body 42 of the cap 14 to be axially displaced away from the tamper-proof ring 26 via the various threads on the neck and the cap, and, on the other hand, guides the projection 72 towards the guide portion 30 of the bearing surface 24 so that it comes into contact with said guide portion 30.

[0107] The main body 42 of the top cover 14 is then rotated through an angle G so that the projection 72 moves axially with the aid of the guide portion 30, as shown in FIG. Fig. 9 In particular, the projection 72 is guided by the ramp 30 away from the main body 42 of the top cover 14 .

[0108] like Fig. 9 and Fig.10 As shown, this axial separation of the body 42 and the tamper-evident ring 26 then causes at least one, and in this case both, primary frangible bridges 58a to break.

[0109] Subsequently, the top cover is rotated around the rotation axis R at an angle between 30° and 60°, triggering the rupture of the membrane 13 by the piercer 15 driven axially toward the membrane 13 by means of the opening member 63 of the top cover 14 and the cooperation between the external thread of the piercer 15 and the internal thread of the neck 10, as combined Fig.11 described.

[0110] In addition, at least one ear 68 retains the tamper-evident ring 26 around the base portion 34 of the neck 10 by axial contact with the bearing surface 24 during the initial opening of the cap.

[0111] Once the membrane has broken, the top cover will continue to rotate more than 60° about the axis of rotation R in order to break all the frangible bridges 58 .

[0112] Thus, once the frangible bridge 58 has broken and rotation about the helical threads has been completed, the body 42 of the cap 14 may pivot relative to the tamper-proof ring 26 via the at least one connecting member 64, wherein the tamper-proof ring 26 and body 42 remain integral with one another.

[0113] It will therefore be appreciated that, in the state after the top cover 14 is first opened, the projection 72 at its main portion 28 at least partially extends relative to the support surface 24. In addition, once the top cover 14 has been first opened, the main body 42 of the top cover 14 and the tamper-proof ring 26 remain attached to each other by means of the connecting member 64, although the frangible bridge 58 has been broken.

[0114] The advantage of this top cover is that the double axial separation of the main body and the tamper-proof ring is achieved by the spiral ribs and the protrusions, thereby facilitating the breaking of the fragile bridge portion.

[0115] Furthermore, the assembly according to the invention is particularly advantageous because it enables the primary frangible bridge to break at an early stage, i.e. when the degree of rotation of the top cover is very low, thereby reliably indicating to the user whether the component has been damaged without the top cover being fully rotated. In other words, the assembly according to the invention has advantageously sequenced the breaking of the primary frangible bridge and the damage of the membrane.

Claims

1. An assembly comprising a threaded neck (10) of a container (12) and a cap (14) mounted on the neck (10) for closing the container (12), the threaded neck (10) and the cap (14) extending around a rotation axis (R), the neck (10) include: - an opening (16); - at least one helical thread (18) formed on the outer surface (20) of the neck (10); - a bearing surface (24) configured to axially retain an anti-tamper ring (26) of the cover (14); The top cover (14) comprises: - a cylindrical cap (14) body (42) centered about the axis of rotation (R) and comprising at least one helical rib (54) designed to engage the helical thread (18) of the neck (10); - an anti-tamper ring (26) centered on the longitudinal axis (R); - a frangible bridge (58, 58a) connecting the body (42) of the cap (14) to the tamper-evident ring (26) and designed to permanently break when the cap (14) is opened for the first time; and - at least one articulated connection member (64) for connecting the tamper-proof ring (26) and the body (42) to each other independently of the first opening of the cover (14); at least one ear (68) which projects from the inside (70) of the tamper-proof ring (26) and which will axially abut the bearing surface (24) of the neck (10) when the cap (14) is opened for the first time; The assembly is characterized in that the top cover (14) includes at least one protrusion (72), which is formed to protrude from the inner side (70) of the tamper-proof ring (26) and is axially offset relative to the ear (68), and the support surface (24) includes at least one guide portion (30), which is inclined relative to a plane perpendicular to the rotation axis (R) and forms a ramp (30), and the ramp is configured to contact the protrusion (72) when the top cover (14) is opened for the first time, so as to axially guide the protrusion (72) to break at least one of the frangible bridges (58, 58a).

2. An assembly according to the preceding claim, wherein the neck (10) comprises a membrane (13) extending into the opening (16), the top cover (14) comprises at least one intermediate member (15) which participates in the process of breaking the membrane (13) when the top cover (14) is opened for the first time, and the assembly is constructed so that at least one of the frangible bridges (58, 58a) breaks before the membrane (13) is pierced.

3. Assembly according to any of the preceding claims, wherein the bearing surface (24) has a second inclination (B) between 20° and 50° relative to a plane perpendicular to the axis of rotation (R).

4. An assembly according to any one of the preceding claims, wherein the bearing surface (24) forms a shoulder (32) on the outer surface (20) of the neck (10) and is such that the bearing surface (24) faces away from the helical thread (18).

5. Assembly according to any one of the preceding claims, wherein the projection (72) is formed diametrically opposite the articulated connection member (64).

6. An assembly according to any one of the preceding claims, wherein the tamper-proof ring (26) includes a tab (62) extending axially toward the body (42) of the top cover (14), and the protrusion (72) is formed on the inner side (70) of the tamper-proof ring (26) at the tab (62).

7. A component according to any of the preceding claims, wherein the projection (72) comprises a bearing surface (74) designed to contact the bearing surface (24) of the neck (10), the bearing surface (74) having a profile inclined relative to a plane perpendicular to the rotation axis (R).

8. Assembly according to any one of the preceding claims, wherein the bearing surface (24) extends radially at a first inclination angle (A) between 90° and 120° relative to the outer surface (20) of the neck (10).

9. A component according to any one of the preceding claims, wherein the support surface (24) comprises two guide portions (30) forming ramps (30) extending in mirror image to each other in an axial plane and such that the free ends (36) of each of the ramps (30) extend at a non-zero first distance (D1) from each other, the free ends (36) defining a channel without a support surface (24) so ​​as to facilitate the positioning of the protrusion (72) when the top cover (14) is mounted on the neck (10).

10. A component according to any of the preceding claims, wherein the bearing surface (24) comprises at least one main portion (28) from which the at least one guide portion (30) extends, the main portion (28) extending in a plane substantially perpendicular to the axis of rotation (R) and extending substantially over the entire circumference of the neck (10) without the guide portion (30).

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