FR2868048A1 - DEVICE FOR CLOSING A COLLAR OF A CONTAINER, CONTAINER EQUIPPED WITH SUCH A DEVICE AND METHOD FOR MANUFACTURING SUCH A DEVICE - Google Patents

Abstract

This closure device (1) comprises a removable cap (40) for closing the neck (2) of the container (3) and a sealing disk (20) pressed against the rim (4) of the neck by the stopper . The sealing piece (20) defines, on its side intended to be turned towards the rim, a first sealing surface (21) on the rim and, on the opposite side, a second pressing surface (22) pressing plug (40), the respective contact properties of these first and second bearing surfaces being able to cause, when applying a pressure force (P) on the sealing piece by the plug, a rotating connection of the sealing member and the neck at the first bearing surface (21) and a sliding contact between the sealing member and the plug at the second bearing surface (22). Application to the capping of glass containers or similar brittle material.

Description

The present invention relates to a closure device of the neck of a

  container and a container equipped with such a device, and a method of manufacturing such a device. The invention relates in particular to

  glass containers containing, for example, an alcoholic beverage or a drug solution.

  When trying to ensure a good seal of a container by such a closure device, especially when the container contains a liquid, or more generally a product particularly sensitive to oxidation and / or when the container is glass or the like , it is known to use a sealing disc which rests in simple support on the rim of the neck around which is attached a removable closure cap. This plug, for example screwed around the neck, thus press the sealing disk against the neck of the neck. Insofar as the closure device must allow the successive uncoupling and filling of the container, it is generally expected that the sealing disc is retained inside the plug, near its bottom wall. An example of such a closure device is given by US-B-4,519,518.

  When the neck of the container is made of glass or a similar brittle material, the surface condition of the mouth of the neck often has asperities, such as microcracks or microcracks. These asperities, or even these splinters, are all the more numerous or marked when the container is a recycling bottle, that is to say a bottle that has already served and has been subjected to cleaning before being reused. When the stopper presses the sealing disk against the rim of the neck, the asperities may tear or cut the disc material, thus altering the tightness of the container.

  The object of the present invention is to provide a closure device and a container provided with such a device, for which the risks of damage to the sealing disc are reduced in order to improve the tightness of the container, even when the surface condition of the rim is impaired, in particular for containers made of glass or a similar brittle material.

  For this purpose, the subject of the invention is a closure device for a container neck, in particular made of glass, comprising a removable closure cap for the neck and a sealing piece adapted to be pressed against the rim of the container. neck by the plug, characterized in that the sealing part defines, on its side intended to be turned towards the rim of the neck, a first sealing surface on the rim and, on the opposite side, a second surface of pressing support of the cap, the respective contact properties of these first and second bearing surfaces being able to cause, during the application of a pressure force on the sealing piece by the plug, a rotating connection of the sealing member and neck at the first bearing surface and a sliding contact between the sealing member and the plug at the second bearing surface.

  The subject of the invention is also a container, in particular made of glass, comprising a neck and equipped with a closure device for this neck, comprising a removable cap for closing the neck and a sealing member adapted to be pressed against the seal. the neck rim, characterized the coefficient of friction between the sealing piece and the rim of the neck is strictly greater than the coefficient of friction between the sealing piece and the plug.

  In the device and the container according to the invention, the sealing part, for example a disc, is, at its face in sealing contact with the rim, connected in rotation with the neck when the stopper presses the disc against the drinking from the neck, the cap being movable sliding support on the opposite side of the disc. The presence of asperities or chips on the surface of the rim therefore does not risk to significantly damage the sealing disc.

  According to an advantageous characteristic of the closure device or container provided with this device, the cap comprises a cap and a generally tubular part open at at least one of its axial ends, adapted to be attached both around the neck of the container so as to removable and inside the cap fixedly and provided on its inner face, means for axial support of the sealing member.

  According to this characteristic, the closure device therefore comprises at least three elements to be assembled, namely the cap, the sealing part, for example a sealing disk, and the tubular part forming an axial support for the sealing part. , this tubular piece and the cap forming at least partially, in the assembled state, the sealing cap of the sealing member against the neck of the neck. Insofar as the support means of the sealing member are carried by the tubular member and not directly by the cap, the latter is more easily molded and especially removed from the mold, no extended surface against undercut being necessary. The outer face of the cap is not altered by sink holes, thus ensuring its external appearance, for example by covering with a covering or a decorative coating.

  According to other characteristics of this device or of this container, taken alone or in any technically possible combination: the outer face of the tubular part carries first locking means in axial translation and first rotational locking means respectively associated with second translational lock means and second corresponding rotational locking means carried by the inner face of the plug; the first translational locking means and / or the first rotational locking means are adapted to cooperate by complementarity of shapes with respectively the second translation locking means and the second rotation locking means; - The first translational locking means have, in longitudinal section, a profile in bosses and recesses and / or the first rotation locking means have, in cross section, a profile in bosses and recesses; the axial support means define at least one axial retaining surface of the sealing piece, spaced apart from one end of the tubular piece by a distance strictly smaller than the axial thickness of the sealing piece when the tubular piece is outside the plug; - The sealing part comprises at least, on the side facing the rim of the neck when the device closes the container, a first sealed layer and, on the opposite side, a second elastically and reversibly deformable layer; - The plug comprises an elastically deformable element secured to a portion of the plug and adapted to bear against the sealing member; - The closure device is provided with means for witnessing the first use of the device, adapted to cooperate with a corresponding portion of the neck during the first uncoupling of the container and the elastic deformation amplitude of the second layer of the sealing member and or the amplitude of elastic deformation of the elastically deformable element of the plug are greater than the clearance between these control means and this part of the neck.

  The invention further relates to a method of manufacturing a closure device of a container neck, in particular made of glass, in which there is a sealing piece adapted to be pressed against the water collar, characterized in that it also has a cap and a generally tubular part open at at least one of its axial ends and provided on its inner face with means for axially supporting the piece of sealing and in that the method comprises the steps during which: a) the sealing piece is placed inside the tubular piece, axially supported on the support means, and b) introduced and immobilized. tubular part inside the cap so as to obtain a removable neck closure cap, adapted to press the sealing piece against the neck rim.

  The method according to the invention thus allows a quick and easy assembly of the closure device consisting of the cap, the sealing part and the inserted tubular part, this device being subsequently easily manipulated to be reduced in order to removable, for example screwed, around the neck of the container. Since the various operations of the method are carried out according to only substantially axial movements, this method is in practice automatable, without impairing its quality of implementation.

  According to an advantageous characteristic of this method, the tubular part used is a sleeve open at its two axial ends, the step a) of setting up the sealing part is carried out before the step b) of introduction and of immobilization of this sleeve and, during step a), the sealing member is placed in axial abutment on the support means by being introduced into the sleeve from its axial end which will be closest to the bottom wall. cap at the end of step b). As the sleeve supports the sealing piece before this sleeve is attached to the cap, the assembly does not require the deformation or the veiling of the sealing part since the latter is initially simply placed on the support means formed on the inner face of the sleeve, and this sleeve is introduced into the plug being subsequently immobilized therein.

  According to another advantageous characteristic of this method, when the tubular piece is introduced into the interior of the cap, a tongue projecting from the inside face of the cap and adapted to fit the bottom wall of the cap is folded towards the bottom wall of the cap. be engaged with a corresponding axial abutment of the neck during the first uncorking of the container.

  The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the drawings, in which: FIG. 1 is an exploded perspective view of a closure device; according to the invention; - Figure 2 is a longitudinal section of the device of Figure 1, assembled around a neck of a container; FIG. 3 is an enlarged view of the circled detail III in FIG. 2; - Figure 4 is a partial sectional view taken along the IV-IV plane shown in Figure 2; FIGS. 5 to 7 are views respectively similar to FIGS. 1 to 3, illustrating a variant of the device according to the invention; and - Figure 8 is a view similar to Figure 2, partly showing another variant of the device according to the invention.

  In Figures 1 and 2 is shown a closure device 1 adapted to be removably attached to a neck 2 of a container 3, for example a glass bottle or the like. The neck 2 has a generally cylindrical shape of axis X-X.

  The rest of the description will be oriented in

  whereas the terms upper and upper correspond to a direction generally parallel to the axis XX and away from the neck 2, that is to say a direction directed towards the upper part of Figures 1 and 2, whereas the terms lower and lower correspond to an opposite direction.

  At its free end, the neck 2 defines a rim 4 at which the liquid in the container is intended to be poured. The outer face of the neck 2 is successively provided, from top to bottom, a helical thread 5 and a ring 6, both radially projecting outwards and integral with the neck. At the transition between the lower end of this ring and the remainder of the neck 2 is formed a transverse shoulder 7 slightly inclined relative to a plane perpendicular to the axis X-X.

  The closure device 1 essentially comprises three distinct parts, namely a cap 10, a sealing disc 20 and a sleeve 30, intended to be assembled coaxially and then mounted on the neck 2. In the assembled state, the cap 10 and the sleeve 30 form an integral, as explained below.

  Le cap when the lower figure axially wall device 1 is attached to the neck 2 as on 2. The cap is open at its end and is closed at its upper end by a bottom 11 to the periphery of which extends downwards a tubular skirt 12 of axis XX. The cap 10 has a tubular shape, X-axis X outer face of the skirt 12 has, in its upper part, a grooved surface 121 for facilitating the grip of the cap 10 by a user.

  In its current part, the skirt 12 is provided, on its inner face, with a protruding tongue 122 possibly discontinuous and which extends both in the direction of the axis XX and the bottom 11. The free end of this tongue 122 is located just below the shoulder 7 of the neck 2 when the device 1 is in its reported configuration of FIG.

  When the device is driven upward for the first time, the tongue 122 engages with the shoulder 7 thereby preventing axial clearance of the lower portion of the skirt 12 while the upper portion of this skirt is removed. For this purpose, a weakening line 123, shown in dashed lines in FIGS. 1 and 2, is provided in the current part of the skirt 12, a little above the tongue 122. This weakening line 123 is for example constituted by bridges breakable material or several notches or circumferential cuts made in the skirt 12.

  The cap 10 is made of a semi-rigid plastic material, such as polypropylene or polyethylene, polypropylene being preferred especially for aesthetic reasons. The cap is obtained by molding, the demolding of the part being achieved without difficulty insofar as the inner face 124 of the skirt 12 has no extended surface of radial undercut. Note that, in the demolded state of the cap 10, the tongue 122 extends in a position different from that shown in Figures 2 and 3, its free end then being directed downwards and not upwards to facilitate the demolding the cap. This tongue must therefore be plastically folded upward during assembly of the device 1, as will be explained later.

  The sleeve 30 consists of a generally tubular body 31 of axis X-X and open at its two axial ends. The sleeve is adapted to be introduced inside the cap 10, being immobilized both axially and in rotation about the axis X-X, and thus have the stopper 40.

  More specifically, as shown in more detail in FIG. 3, the upper part of the outer face 32 of the sleeve has, in longitudinal section, a bump and recess profile 321 substantially complementary to a corresponding bump and recess profile 125 of the inner face 124 of the skirt 12 of the cap 10. The outer face 32 of the sleeve is for this purpose provided with an axial series of annular rods 322 radially outwardly projecting, able to cooperate by complementary form with similar rims of the inner face 124 of the skirt 12 to participate in the locking in axial translation of the sleeve 30 relative to the cap 10.

  The lower part of the outer face 32 of the sleeve 30 has, in cross-section, as shown in FIG. 4, a humped and recessed profile 323 complementary to a humped and recessed profile 126 corresponding to the inner face 124 of the skirt 12. The outer face 32 of the sleeve 30 is for this purpose provided with a plurality of grooves 324 radially outwardly projecting and extending parallel to the axis XX, distributed along the periphery of the sleeve. These ridges 324 are adapted to engage with complementary longitudinal grooves of the inner face 124 of the cap and thus to ensure that the cap 30 rotates relative to the cap 10.

  In addition, the upper end of the body 31 of the sleeve 30 forms an edge 33 substantially complementary to the inner face of the zone 13 connecting the bottom wall 11 and the skirt 12 of the cap. The upper end edge 33 thus forms for the sleeve 30 an axial abutment upwards with respect to the cap 10.

  Similarly, the lower end of the body 31 of the sleeve 30 forms a substantially plane edge 34 and adapted to bear axially on a bulge 127 radially projecting inwardly of the inner face 124 of the skirt 12. The end edge The lower part 34 thus forms for the sleeve 30 an axial abutment downwards with respect to the cap 10.

  The sleeve 30 also defines an inner face 35 provided, in its upper part, with a shoulder 351 and, in its lower part, with a thread 352, both radially projecting inwards.

  The thread 352 is substantially complementary to the external thread 5 of the neck 2, so that the sleeve 30 is able to be screwed and unscrewed on the neck 2.

  The shoulder 351 delimits an upper surface 353 that is substantially flat and adapted to form an axial downward support for the sealing disc 20. The axial distance x separating this face 353 from the upper end edge 33 is strictly less than axial thickness of the disc 20 at rest, that is to say when the sleeve 30 is not reported inside the cap 10.

  The sleeve 30 is made of a molded plastic such as polyethylene. Insofar as the sleeve is intended to be fully inserted and therefore hidden inside the cap 10, its external surface state is of little importance so that the formation of sink holes or other surface defects is acceptable when of its manufacture.

  The sealing disc 20 delimits a lower surface 21 intended to be in simple abutment and in sealing contact against the rim 4 of the neck 2 and an upper surface 22 intended to be pressed downwards by the bottom wall 11 of the cap 10. The lower face of this bottom wall is provided with an annular bulge 111 axially projecting downwards and located vertically above the rim when the device 1 is attached around the neck.

  Regardless of the presence of the sleeve 30, the lower surface 21 of the disc 20 has a coefficient of friction, vis-à-vis the glass constituting the neck 2, which is strictly greater than the coefficient of friction between the upper surface 22 of the disc and the In this way, even when an intense pressure force P is applied to the disk by the bottom 11 of the cap 10, the disk is rotatably connected to the neck 2 while the cap 10 is in sliding contact on the surface. 22 of the disc. These respective coefficients of friction of the surfaces 21 and 22 result for example from the material constituting the sealing disk or are the consequence of appropriate treatments or surface coatings. Examples of materials and coatings are given below.

  The lower face 21 optionally defines an annular hollow impression 211, visible in FIG. 1, substantially complementary to the rim 4 of the neck 2.

  According to an advantageous characteristic of the invention and independent of the presence of the sleeve 30, the sealing disc 20 is made of at least two cylindrical layers 23 and 24 superimposed axially. These layers 23 and 24 are integral with each other either by simple friction or by a suitable adhesive material.

  The lower layer 23 is made of a waterproof material, rigid or semi-rigid in order to stabilize the structure and prevent leakage. The upper layer 24 is made of a flexible material, in practice more flexible than the material constituting the lower layer 23.

  The layer 23 may be provided with plastic deformation while the layer 24 is elastically deformable and reversibly so that, at rest, that is to say when the closure device 1 is not attached to the neck 2 the upper face 22 of this layer extends for example substantially in a plane transverse to the axis XX whereas, when the device 1 is in its capping configuration of Figures 2 and 3, the inner bulge 111 of the cap 10 deforms downwards the upper face 22, the layer 24 transmitting the pressure force P to the lower layer 23.

  Advantageously, the flexible layer 24 has a long resistance in elasticity so that it resumes overall its original shape even after remaining in a deformed configuration for several years.

  By way of example of materials constituting the lower layer 23, both sufficiently rigid and with a high coefficient of friction with respect to the rim 4, mention may be made of polyethylene foams, optionally coated, on the drinking side, or a thin film made of a soft and soft material, such as an ionomer, or a thin multi-layer coating incorporating a layer of metal or polyvinylidene chloride (PVDC) to ensure a better gas tightness. Similarly, as materials constituting the upper layer 24, both sufficiently flexible and sliding contact vis-à-vis the cap 10, there may be mentioned silicone, rubber or thermoplastic elastomers such as styreneethylenes / butylenitytyrenes (SEBS) .

  The assembly of the closure device 1 and its establishment around the neck 2 will now be described.

  Initially, it has the cap 10 in its demolded state mentioned above, that is to say in particular with its tab 122 directed downwards, as well as the sleeve 30 and the sealing disc 20.

  In a first step, the sealing disc 20 is brought above the sleeve 30, coaxially, and this disc is axially deposited on the upper face 353 of the shoulder 351. No deformation of the disc is necessary, the inner diameter of the upper part of the sleeve being slightly greater than the outer diameter of the disc.

  In a second step, the sleeve 30 thus provided with the disc 20 is introduced inside the cap 10, introducing it axially and in force from its open lower end. The tooling allowing the introduction of the sleeve inside the cap then advantageously ensures the folding of the tongue 122 upwards, so that it takes the configuration of Figures 2 and 3.

  The sleeve 30 is axially inserted into the cap 10 until its upper end edge 33 abuts against the bottom wall 11. The sleeve is then wedged axially inside the cap by the cooperation at the same time. the end edge 33 with the zone 13, the lower end edge 34 with the bulge 127 of the skirt 12 and the bump and hollow profile 321 of the sleeve with the complementary profile 125 of the skirt 12 of the cap. The sleeve is also rotated relative to the cap by the cooperation of the bosses and hollow profiles 323 of the sleeve and 126 of the plug.

  The plug 40 thus formed of the cap 10 and the sleeve 30 integral with each other and internally equipped with the sealing disk 20 is then screwed around the neck 2 until, on the one hand, the tongue 122 passes below the shoulder 7 of the neck and, secondly, the sealing disc 20 is axially pressed between the rim 4 and the annular bulge 111 of the bottom wall 11. The device 1 is then in its configuration of Figures 2 to 4.

  When the end of the tightening of the plug 40 around the neck 2, the pressure force P applied to the disc 20 causes the rotation connection of this disc with the rim 4 while the bottom wall 11 slides on the upper surface 22 of the disk. In this way, in the event that the surface state of the rim 4 is altered, in particular by the presence of micro-cracks or micro-cracks of the rim glass 4 made for example during the cleaning of the receptacle, these asperities of surface will not cause tearing of the waterproof layer 23.

  During the first use of the closure device 1, a user unscrews the device by applying a corresponding torque on the plug 40, in particular by tightening the plug at the grooved outer surface 121 of the skirt 12. As the sleeve 30 is immobilized inside the cap 10, the entire device is unscrewed upwards causing the tongues 122 to engage the shoulder 7 of the neck 2. By breaking the line of weakness 123, the entire upper part of the Device 1 continues to be unscrewed upwards, while the lower part of the cap 10 remains in place around the neck.

  Depending on the manufacturing tolerance of the tongue 122 as well as the surface condition of the shoulder 7, which can be altered by splinters of the glass constituting the neck 2, it is possible that a non-negligible axial clearance exists between the free end of the tongue and the shoulder. In other words, the device 1 is then unscrewable over an angular stroke of several degrees without the line of weakness 123 being broken. During this initial phase of unscrewing the stopper 40, however, the sealing of the receptacle is ensured by the sealing disc 20. More precisely, the elastic upper layer 24 then compensates for the upward elevation of the stopper, by deforming elastically of in order to maintain the waterproof support of the layer 23 on the rim 4.

  The user of the closure device 1 is thus assured of the perfect hermetic preservation of the contents of the container 3, especially when the latter contains a product that is particularly sensitive to air and / or has been filled under aseptic conditions. This advantageous arrangement of the sealing disk 20 also limits in this way the risk of sabotage of the contents of the container 3, that is to say, more generally, the inadvertent introduction into the container of substances should not be there and who could have entered when the cap 40 is removed from the rim without the weakening line 123 is broken.

  The device 1 can subsequently be screwed on the neck 2 of the container 3, the disc 20 being returned to the sealing position against the rim 4 as during the initial placement of the device on the neck.

  FIGS. 5 to 7 show a variant 1 'of the closure device 1 of the preceding figures. For convenience, the identical elements between the devices 1 and 1 'bear the same references while the specific elements of the device 1' carry references followed by a premium.

  Variant 1 'differs essentially from device 1 in the form of the part secured to the inside of cap 10 which, unlike sleeve 30 of the preceding figures, is in the form of a cap 30' consisting of a generally tubular body 31 'of axis XX and axially open at only one of its two ends.

  Like the sleeve 30, the cap 30 'is adapted to be introduced inside the cap 10, being immobilized both axially and in rotation around the axis X-X, and thus have a plug 40'. For this purpose, the cap 30 'is provided with arrangements similar to the sleeve 30, that is to say an outer face 32' which, in cross section, has a profile 323 'in bosses and recesses similar to that shown in Figure 4 for the sleeve 30, an upper end portion 33 'which forms an axial stop upwardly relative to the cap 10 and a lower end edge 34' which forms an axial stop downwards with respect to the cap.

  Unlike the sleeve 30, the upper end portion 33 'of the cap 30' consists of a bottom wall in the form of a disc of material, centered on the axis XX, which closes the end upper tubular body 31 '. This bottom wall 33 'is not connected over its entire periphery to the body 31', but in several zones 36 'distributed uniformly along this periphery. One of these connection areas is shown in section in FIG. 6 and not in FIG.

  The inner face 35 'of the cap 30' is provided in its lower part with a thread 352 'similar to the thread 352 of the sleeve 30. In its upper part, the inner face 35' is provided with a plurality of notches 351 'radially protruding inward, distributed, along the periphery of the body 31', between two connecting zones 36 '. Each notch 351 'delimits an upper surface 353' substantially flat and adapted to form an axial downward support for the sealing disc 20. All of these faces 353 'thus constitutes an axial support for the disk 20, substantially similar to the face 353 of the shoulder 351 of the sleeve 30.

  The assembly of the closure device 1 'and its establishment around the neck 2 will now be described.

  Initially, it has the cap 10 in its demolded state defined above, as well as the cap 30 'and the sealing disc 20.

  The disk 20 is brought into the interior of the cap 30 'so as to place this disk axially between the faces 353' of the notches 351 'and the bottom wall 33'. Unlike the device 1, to allow this setting up, a slight deformation of the disk is necessary and the axial distance separating the faces 353 'of the bottom wall 33' must be strictly greater than the thickness at rest of the disk 20 .

  Before or after setting up the disc 20 inside the cap 30 ', this cap is placed inside the cap 10, introducing it axially and in force from its open lower end, in a similar way to introducing the sleeve 30 into this cap.

  This forms the plug 40 'which is then attached by screwing around the neck 2 until, on the one hand, the tongue 122 passes over the shoulder 7 of the neck, and, on the other hand, the sealing disc 20 is axially pressed between the rim 4 and the bottom wall 33 'of the cap 30'. The device 1 'is then in its configuration of FIGS. 6 and 7.

  When the end of the tightening of the stopper 40 'around the neck 2, the pressure force P applied on the disc 20 causes the rotational connection of this disc with the rim 4 while the bottom wall 33' slides on the upper surface 22 of the disc. In the same way as for the device 1, assuming the surface condition of the rim 4 is altered, the sealed layer 23 of the disc 20 is not damaged. It will be noted that, unlike the device 1, the tightening of the cap 40 'does not lead to pressing the disc 20 directly through the bottom wall 11 of the cap 10, but through the bottom wall 33' of the cap 30 ', this bottom wall itself being pressed downwards by the bottom wall 11 of the cap. It is therefore appropriate that the lower surface 21 of the disk 20 has a coefficient of friction, vis-à-vis the glass constituting the neck 2, which is strictly greater than the coefficient of friction between the upper face 22 of this disk and the wall 33 'of the cap 30' so that the face 22 is in sliding contact while the face 21 rotates the disc 20 to the neck 2 during the application of the pressure force P. The first use of the device 1 ' , as well as its subsequent uses, are similar to those described for device 1.

  FIG. 8 is partly a variant 1 "of the closure device 1 of FIGS. 1 to 4. For convenience, the identical elements between the devices 1 and 1" bear the same references while the specific elements of the device 1 "carry references followed by a second.

  Variant 1 "differs essentially from the device 1 by, on the one hand, its sealing disc 20" which is single-layer and, on the other hand, the presence of another sealing disc 14 "integral with remainder of the bottom wall 11, for example by gluing, the cap 10 "of the device 1" thus comprises both the plastic body including the bottom wall 11 and the skirt 12, that is to say globally the cap 10 of the device 1, and the disk 14 ", the cap 10" forming an integral unit.

  The cap formed of this cap 10 "and the sleeve 30 is referenced 40".

  For the variant 1 ", when the plug 40" is tightened around the neck 2, the disc 14 ", fixed with respect to the bottom wall 11, presses the disc 20" against the rim 4 of the neck 2, as indicated by the arrows P. Similar to the device 1, the pressure applied to the disc 20 "causes its connection in rotation with the rim 4 at its lower surface 21" while the disc 14 "slides on the upper surface 22" of the disc The discs 14 "and 20" are thus free to rotate relative to one another.

  For example, the disc 14 "of the cap 10" is made of an elastic material, such as silicone, while the sealing disc 20 "is made of a polyethylene foam covered, the side of the rim 4 a coating with a high coefficient of friction vis-à-vis the glass of the rim while it is covered, on the opposite side, a coating with a low coefficient of friction vis-à-vis the disk 14 ".

  Note that this variant 1 "combines the same advantages as the device 1, namely - similarly to the lower layer 23 of the disk 20, the material constituting the disk 20" is not damaged at its surface 21 "by the rim 4 if the latter has an altered surface condition, and - similarly to the upper layer 24 of the disc 20, the elastic disc 14" compensates for the beginning of elevation of the plug 40 "during its unscrewing so to maintain the tight support of the disk 20 "on the rim.

  The assembly, the first use and the subsequent uses of the device 1 "are similar to those described for the device 1.

  A variant not shown is to combine the variants 1 'and 1 "by joining a disk-like flexible disk 14" on the bottom wall 33' of the cap 30 'and using the sealing disc 20 ".

  Various arrangements and variants of the closure device described above are of course conceivable.

  For example, the sealing disc 20 is replaceable by a sealing washer whose inner diameter is substantially equal to or smaller than the internal diameter of the rim 4. Similarly, in addition to or instead of the securing means by complementarity of forms envisaged above, the tubular member 30 or 30 'permanently attached to the inside of the cap 10 may be welded to this cap, in particular by ultrasound application, or glued.

Claims (11)

  1. Device for capping a container neck (2) (3), in particular glass, comprising a removable cap (40; 40 '; 40 ") for closing the neck (2) and a sealing member (20; 20") adapted to be pressed against the rim (4) of the neck by the stopper, characterized in that the sealing member (20; 20 ") delimits, on its side intended to be turned towards the rim (4) of the neck (2), a first surface (21; 21") of sealing support on the rim and, on the opposite side, a second pressing surface (22; 22 ") of the plug (40; 40 '; 40"), the respective contact properties of these first and second bearing surfaces being able to cause, during the application of a pressure force (P) on the sealing member by the plug, a rotational connection of the sealing member and the neck at the first bearing surface (21; 21 ") and a sliding contact between the sealing piece and the plug at the second bearing surface (22; 22 ").   2. Container (3), in particular glass, having a neck (2) and equipped with a device (1; 1 '; 1 ") for plugging this neck comprising a removable cap (40; 40'; 40") for closing the neck and a sealing piece (20; 20 ") adapted to be pressed against the rim (4) of the neck, characterized by the coefficient of friction between the sealing piece (40; 40 '; 40 ") and the rim (4) of the neck (2) is strictly greater than the coefficient of friction between the sealing piece (20; 20") and the plug.   3. Device or container according to one of claims 1 or 2, characterized in that the plug (40; 40 '; 40 ") comprises a cap (10; 10") and a generally tubular part (30; 30') open at at least one of its axial ends (33, 34; 34 '), adapted to be attached both around the neck (2) of the container (3) removably and within the cap (10; ") in a fixed manner and provided on its inner face (35; 35 '), means (351; 351') for axial support of the sealing piece (20).   4. Device or container according to claim 3, characterized in that the outer face (32; 32 ') of the tubular piece (30, 30') carries first means (321, 33, 34; 33 ', 34'). axial translation locking means and first rotational locking means (323; 323 ') associated respectively with second translation locking means (125, 11, 127; 11, 127) and second means (126; 126); correspondingly complementary rotational locking devices carried by the inner face (124) of the cap (10; 10 ").   5. Device or container according to any one of claims 3 or 4, characterized in that the axial support means (351) define at least one surface (353) of axial retention of the sealing piece (20; ), spaced from one (33) of the ends of the tubular piece by a distance (x) strictly smaller than the axial thickness of the sealing piece (20; 20 ") when the tubular piece is outside cap (10; 10 ").   6. Device or container according to any one of the preceding claims, characterized in that the sealing member (20) comprises at least, on the side facing the rim (4) of the neck (2) when the device (1; 1 ') mouth the container (3), a first layer (23) sealed and, on the opposite side, a second layer (24) elastically deformable.   7. Device or container according to any one of the preceding claims, characterized in that the plug (40 ") comprises an element (14") elastically deformable, integral with another portion (11) of the plug and adapted to s' press against the sealing piece (20 ").   8. Device or container according to one of claims 6 or 7, characterized in that the closure device (1; 1 ') is provided with control means (122, 123) of the first use of the device, adapted to cooperate with a corresponding part (7) of the neck (2) during the first unclogging of the container (3) and in that the amplitude of elastic deformation of the second layer (24) of the sealing part (20) and / or the elastic deformation amplitude of the elastically deformable element (14 ") of the plug (40") are greater than the clearance between these control means and this portion (7) of the neck.   9. A method of manufacturing a closure device of a neck (2) container (3), in particular glass, wherein there is a sealing member (20) adapted to be plated in sealing engagement on the rim (4) of the neck (2), characterized in that there is furthermore a cap (10) and a generally tubular piece (30; 30 ') open at at least one of its axial ends ( 33, 34, 34 ') and provided on its inner face (35; 35') with means (351; 351 ') for axial support of the sealing member (20; 20 ") and in that the method comprises the steps during which: a) the sealing piece (20) is placed inside the tubular piece (30; 30 '), axially supported on the support means (351), and b) on introduced and immobilized the tubular piece (30; 30 ') inside the cap (10; 10 ") so as to obtain a removable cap (40; 40'; 40" closing the collar (2) adapted for press the sealing piece (20; 20 ") against e the drinking (4) of the neck (2).   10. The method of claim 9, characterized in that the tubular member (30) used is a sleeve open at its two axial ends (33, 34), in that step a) of setting up the workpiece. sealing (20; 20 ") is performed before step b) of introduction and immobilization of this sleeve (30) and in that, during step a), the sealing piece is placed in support axial on the support means (351) being introduced into the sleeve from its axial end (33) which will be closest to the bottom wall (11) of the cap (10) at the end of step b).   11. A method according to any one of claims 9 or 10, characterized in that, during step b) of introduction and immobilization of the tubular piece (30; 30 '), is folded towards the wall of bottom (11) of the cap (10; 10 ") a tongue (122) projecting from the inner face (124) of the cap (10) and adapted to be engaged with a corresponding axial abutment (7) of the neck (2) during the first uncorking of the container (3).