EP0899204A1 - Cap with tamper-evident band for vial with neck of large diameter - Google Patents

Abstract

The container has a large-diameter neck (5), typically between 4 and 20 cm, and a lid with a skirt having an internal thread matching that (9a,9b,9c) on the container neck. The neck has a zone (21) with a series of notches (22) separated by projections (24), and the lid has a tamperproof ring which is connected to its skirt by bridges that are broken when the ring is first removed to allow the lid to be opened. The projections and notches on the container neck engage with teeth on the inside of the tamperproof ring and fix it in position so that the bridges break when the lid is unscrewed. In addition, the rim of the container has an inclined lip to receive a seal which has to be opened on first use.

Description

The invention relates to a material stopper. one-piece plastic of the type comprising a wall transverse, a side skirt provided with a thread internal, a tamper-evident ring extending the skirt opposite the transverse wall and connected to the skirt at least by frangible connecting bridges.

The invention also relates to an assembly comprising such a stopper and a bottle whose neck comprises an external thread which can cooperate with the thread internal plug.

The invention finally relates to this assembly including a contained in the bottle.

We already know caps and sets bottle stopper such as those mentioned above.

The invention aims, for this type of cap and assembly, improve sealing and inviolability for bottles whose neck may have a large diameter, of the order of 4 to 20 centimeters.

Improving sealing and inviolability is required with, simultaneously, a conveniently industrializable and capable of keep its efficiency despite dimensional variations container necks due to the technique of transformation used, for example blow molding.

• un flacon présentant un col fileté définissant une ouverture d'extrémité de grand diamètre, typiquement compris entre 4 et 20 centimètres ;
• un bouchon dont la jupe latérale présente des filets complémentaires aux filets du col du flacon, ledit flacon et ledit bouchon étant réalisés en matière plastique,
• le col du flacon comporte une zone à encoches, ces encoches étant séparées par des saillies ;
• le bouchon comporte une bague d'inviolabilité reliée à la jupe par des ponts frangibles, ladite bague étant pourvue d'une pluralité de crans situés et dirigés vers l'extérieur de la bague ;

To this end, the invention relates to a container of the type comprising:

• a bottle having a threaded neck defining a large diameter end opening, typically between 4 and 20 centimeters;
• a stopper, the side skirt of which has threads complementary to the threads of the neck of the bottle, said bottle and said stopper being made of plastic,
• the neck of the bottle has a notched area, these notches being separated by projections;
• the stopper comprises a tamper-evident ring connected to the skirt by frangible bridges, said ring being provided with a plurality of notches located and directed towards the outside of the ring;

the notches and the protrusions of the cooperating neck with the notches of the ring so as to interfere when first unscrewing of the cap, while allowing rupture bridges,

the end of the bottle opening being delimited by a lip inclined with respect to a transverse plane P at the cap,

this lip having for function, in the first place, to receive and ensure the joining of a cover of original closure of the bottle and, secondly, the cover having been removed at the first screwing of the bottle, to form a sealing surface cooperating with the plug.

In one embodiment, the plug is without seal, sealing being ensured by crushing the lip by screwing the cap.

• la figure 1 est une vue latérale d'un ensemble bouchon-flacon, avant première ouverture ;
• la figure 2 est une vue latérale de la partie extrême supérieure du flacon ;
• la figure 3 est une vue montrant, en partie droite, une coupe selon la ligne III-III de la figure 2 et, en partie gauche, une vue de dessus selon la flèche F de la figure 2 ;
• la figure 4 est une vue du cran d'inviolabilité suivant le plan de joint IV-IV de la figure 3 ;
• la figure 5 est une vue en coupe longitudinale du bouchon ;
• la figure 6 est une vue partielle en coupe transversale selon la ligne VI-VI de la figure 5 ;
• la figure 7 est une vue en coupe transversale selon la ligne VII-VII de la figure 5 ;
• la figure 8 est une vue de détail d'une partie de la figure 7 ;
• la figure 9 est une vue de détail de la figure 6 ;
• la figure 10 est une vue en coupe selon la ligne X-X de la figure 8.

Other objects and advantages of the invention will appear more clearly during the following description of an embodiment, description which will be made with reference to the appended drawings in which:

• Figure 1 is a side view of a cap-bottle assembly, before first opening;
• Figure 2 is a side view of the upper end of the bottle;
• Figure 3 is a view showing, in the right part, a section along the line III-III of Figure 2 and, in the left part, a top view along the arrow F of Figure 2;
• Figure 4 is a view of the tamper evident notch along the joint plane IV-IV of Figure 3;
• Figure 5 is a longitudinal sectional view of the plug;
• Figure 6 is a partial cross-sectional view along line VI-VI of Figure 5;
• Figure 7 is a cross-sectional view along line VII-VII of Figure 5;
• Figure 8 is a detail view of part of Figure 7;
• Figure 9 is a detail view of Figure 6;
• FIG. 10 is a sectional view along line XX of FIG. 8.

In this text, unless otherwise stated, the terms "upper", "lower", "high", "low", "lateral", "internal", "external", are used with reference to a point located in the middle of the bottle.

This bottle 1 comprises a body 2 with a bottom wall 3 and side wall 4.

The upper end of the side wall 4 forms the neck 5 of the bottle 1, defining an orifice end 6.

In the embodiment shown, this body 2 is of revolution around an axis 7 substantially perpendicular to the bottom wall 3.

In other embodiments, not shown, this body 2 can be, in cross section perpendicular to axis 7, square, rectangular, oval, polygonal, or any other outline related to transport, sales conditions for example.

The body 2 is, in the embodiment shown, substantially cylindrical, axis 7.

In other embodiments, not shown, the body 2 is tapered or has one or more several smaller diameter zones.

The bottle 1 is, in one embodiment, made of high density polyethylene by extrusion blowing.

Remember that blow molding, which appeared in France in the 1950s for the manufacture of plasticized PVC bottles for packaging detergents and cleaning products, consists of extruding a warm and soft parison of synthetic material the inside of a mold in at least two pieces, then at blow air into said parison, through the opening of the mold corresponding to the neck of the container, to press the parison on the mold surfaces.

Bottle 1 can be produced by extrusion blowing in a material chosen from the group comprising polyvinyl chloride, possibly bi-oriented, polyolefins such as low density polyethylene, high density polyethylene or low polyethylene blend and high density, cellulose triacetate, polymers acrylic, polypropylene and its copolymers, polycarbonate, bi or tripolymer complexes, polyethylene polypropylene blends.

The blend of high and low density polyethylene could be chosen for example when the body 2 must have some flexibility.

Polyethylene, of great chemical inertness and free of extractable additives can be chosen by example when body 2 must contain food food or detergents.

Polypropylene, possibly bi-stretched and rendered thus transparent can be chosen when the body 2 must resist sterilization.

Cellulose triacetate could be considered when the bottle is intended to contain products containing oil or essences.

Acrylic polymers, very impermeable to oxygen could be considered for body packaging fatty, possibly food.

Polycarbonate could be considered in certain specific applications, particularly in the environment hospital, for sterilizable bottles.

Among the bi or tripolymer complexes polyamide / polyolefin complexes will be to consider for medical applications.

The polypropylene / ethylene and copolymer complexes vinyl acetate, the complexes in which one of constituent is polyvinylidene chloride can be chosen when the bottle should be both enough impermeable to gas, water vapor and present a fairly good mechanical resistance.

The neck 5 of the bottle 1 has an external thread 8.

This thread 8 comprises, in the embodiment shown, three threads 9a, 9b and 9c extending over a ring height h ₁ .

The start of the threads h ₂ is, in the embodiment shown, substantially equal to the thickness h ₃ of the threads 9a, 9b, 9c and slightly greater than the pitch h ₄

The difference between the diameter on thread D ₁ and the diameter at the bottom of thread D ₂ is slightly greater than the thickness e ₁ of the neck 5 of the bottle 1.

The unblocking diameter D ₃ is substantially less than the diameter at the bottom of the thread D ₂ .

The neck 5 has indeed, at its extreme part upper, an inclined lip 10 disposed between the rim 11 of neck 5 and the peripheral surface substantially vertical 12 located above the thread 9a.

The structure of this inclined lip 10, such as shown in the figures, can be described as follows.

• une première face 13, inclinée d'un angle α₁ compris entre 1 et 20° par rapport au plan transversal P,
• une deuxième face 14, inclinée d'un angle α₂ compris entre 40 et 60° par rapport au plan transversal P.

Starting from the edge of the end orifice 6, the inclined lip 10 comprises:

• a first face 13, inclined at an angle α ₁ of between 1 and 20 ° relative to the transverse plane P,
• a second face 14, inclined at an angle α ₂ between 40 and 60 ° relative to the transverse plane P.

In the embodiment shown, the first face 13 is inclined by about 15 ° relative to the plane transverse P.

To ensure good mechanical resistance and taking into account the particularities of the manufacturing process, special attention was paid to the connections between the different sections of the bottle 1.

Connection leave 15, 16 thus links the first face 13 to the second face 14 of the lip 10 and the second face 14 to the vertical peripheral surface 12 of the ring, respectively.

These holidays of connection 15, 16 allow mitigate stress concentrations and the effect of residual stresses.

The threads 9a, 9b, 9c are inclined at an angle α ₃ between 5 and 15 ° relative to the plane P.

• une première surface de filet 17, inclinée d'un angle α₄ de l'ordre de 45° par rapport au plan P ;
• une deuxième surface de filet 18, sensiblement verticale ;
• une troisième surface de filet 19, inclinée d'un angle α₅ de l'ordre de 10° par rapport au plan P.

Each thread 9a, 9b, 9c defines, in longitudinal section perpendicular to the plane P, from top to bottom:

• a first thread surface 17, inclined at an angle α ₄ of the order of 45 ° relative to the plane P;
• a second net surface 18, substantially vertical;
• a third thread surface 19, inclined at an angle α ₅ of the order of 10 ° relative to the plane P.

The height h ₅ of the second net surface 18 is of the order of a tenth of the step h ₄ .

The threads extend over 300 ° on the periphery of the col 5, in the embodiment shown.

In another embodiment, not shown, the threads are interrupted in the joint plane of the neck, in order to prevent possible material burrs plastic do not interfere with the screwing of the cap, this to take into account possible wear and aging of the blow molding mold.

The ring of height h ₁ is arranged above a shoulder 20.

This shoulder, with an outside diameter D ₄ , greater than the diameter on the thread D ₁ , extends over a height h ₆ .

Below and contiguous to this shoulder 20, is arranged a reservation zone 21, of height h ₇ .

This reserved area 21 has an outside diameter D ₅ slightly greater than the outside diameter D ₄ of the shoulder 20.

Reservations or notches 22 define tamper-evident notches cooperating with projections of the tamper-evident band of the cap or associated cap thus that it will be described later.

Below and adjoining reservation area 21 is the side wall 4 of the body 2.

The outside diameter D ₆ defined by this side wall is slightly greater than the outside diameter D ₅ of the zone 21.

As mentioned above, leave from connection between the shoulder 20, the zone 21 and the wall lateral 4 respectively limit the value of the coefficient stress concentration and mitigate the effect of residual stresses.

The geometry of the notches 22 appears on the Figures 3 and 4 in particular.

In the embodiment shown, six notches 22 are regularly distributed over the periphery from pass 5, in zone 21.

In other embodiments, not represented, three or four notches are arranged in zone 21, regularly distributed or not.

The notches 22 are delimited by a bottom wall 23 defined by a diameter D ₇ between the diameter on the thread D ₁ and the diameter at the bottom of the thread D ₂ .

Projections 24 separate the notches 22 from each other others.

These projections extend, in a transverse plane, over an angular sector of the order of 3 to 20 °.

The external lateral surface 25 of each projection 24 defines the maximum external diameter D ₅ of the zone 21.

Each projection 24 is limited, laterally, by two substantially flat surfaces 26 and 27 inclined relative to a tangential vertical plane T of an angle α ₆ between 30 ° and 60 °.

In the embodiment shown, the angle α ₆ is of the order of 45 °.

The connection radius 28 between the surface rear 26 of each projection 24 and the lateral surface 25 is smaller than the connecting radius 29 between the front surface 27 of each projection 24 and the external lateral surface 25.

Likewise, the radius of connection between the surface rear 26 of each projection 24 and the bottom wall 23 is smaller than the radius of connection between the surface front of each projection and the outer lateral surface 25.

The expression "rear" surface 26 of each projection 24 is used here with reference to the direction of screwing of the cap on the collar as will be explained more completely later.

Similarly, the expression "front" surface 27 of each projection 24 is used with reference to the direction of screwing V of the cap on the neck.

The size of the bottle 1 naturally depends the amount of liquid, pasty or powdery product that we want to condition.

• diamètre de débouchage D₃ : 80 mm ;
• diamètre au congé de raccordement D₁₅ : 89 mm ;
• diamètre au congé de raccordement D₁₆ : 91 mm (égal au diamètre en fond de filet D₂) ;
• diamètre sur filet D₁ : 94,1 mm ;
• diamètre sur épaulement 20 D₄ : 96,2 mm ;
• diamètre externe D₆ de la paroi latérale 4 : 99 mm ;
• diamètre D₇ en fond d'encoches 22 dans la zone 21 : 92,8 mm ;
• diamètre extérieur D₅ de la zone 21 : 97,2 mm ;
• hauteur de la zone 21, h₇ : 7,3 mm ;
• hauteur de l'épaulement 20, h₆ : 2,2 mm ;
• hauteur h₈ correspondant à la première face 13 de la lèvre 10 : 0,92 mm ;
• hauteur h₉ correspondant à la deuxième face 14 de la lèvre 10 : 1,5 mm ;
• pas h₄ : 12 mm ;
• trois filets s'étendant sur 300° ;
• hauteur de la face verticale des filets : 1 mm ;
• angle α₁ : 15° ;
• angle α₂ : 45° ;
• angle α₃ : 10°.

As an indication, the following dimensions are given, for one embodiment:

• unclogging diameter D ₃ : 80 mm;
• diameter at connection leave D ₁₅ : 89 mm;
• diameter at connection clearance D ₁₆ : 91 mm (equal to the diameter at the bottom of the thread D ₂ );
• diameter on thread D ₁ : 94.1 mm;
• diameter on shoulder 20 D ₄ : 96.2 mm;
• external diameter D ₆ of the side wall 4: 99 mm;
• diameter D ₇ at the bottom of notches 22 in zone 21: 92.8 mm;
• outer diameter D ₅ of zone 21: 97.2 mm;
• height of zone 21, h ₇ : 7.3 mm;
• height of the shoulder 20, h ₆ : 2.2 mm;
• height h ₈ corresponding to the first face 13 of the lip 10: 0.92 mm;
• height h ₉ corresponding to the second face 14 of the lip 10: 1.5 mm;
• pitch h ₄ : 12 mm;
• three threads extending over 300 °;
• height of the vertical face of the nets: 1 mm;
• angle α ₁ : 15 °;
• angle α ₂ : 45 °;
• angle α ₃ : 10 °.

We will now describe the cap or cap 30.

• une paroi transversale de fond 31 ;
• une jupe latérale 32 pourvue d'un filetage interne 33 ;
• une bague d'inviolabilité 34 prolongeant la jupe latérale 32 et reliée à celle-ci par des ponts de liaison frangibles 35.

This plug 30 comprises:

• a transverse bottom wall 31;
• a side skirt 32 provided with an internal thread 33;
• a tamper-evident ring 34 extending the side skirt 32 and connected to the latter by frangible connecting bridges 35.

The bottom transverse wall 31 has a thinned central part 36.

This thinned part 36 has a diameter and a thickness such that the bottles are easily stackable and storable.

The side skirt 32 has ridges 37 or gadroons on its external surface, facilitating the unscrewing of the cap 30.

The internal thread 33 is of a form complementary to the external thread 8 of the neck 5 of the bottle 1.

This internal thread 33 has three threads 38a, 38b, 38c, extending over 285 °.

The threads 38a, 38b, 38c are interrupted.

These threads are successively full over 45 °, 60 ° hollow, 60 ° solid, 60 ° hollow full on 60 °, as it appears in the figures.

The outer surface of the side skirt 32 is slightly tapered, its diameter decreasing from the bottom to the top.

The inner surface of the skirt is, in turn, substantially vertical, between the threads 38a, 38b, 38c.

• une première surface 39 inclinée d'un angle α₇ de 10 à 30° par rapport au plan P ;
• une deuxième surface 40, sensiblement verticale ;
• une troisième surface 41, inclinée d'un angle α₈ de 10 à 30° par rapport au plan P.

Each thread 38a, 38b, 38c defines, from top to bottom, in longitudinal section:

• a first surface 39 inclined at an angle α ₇ from 10 to 30 ° relative to the plane P;
• a second surface 40, substantially vertical;
• a third surface 41, inclined at an angle α ₈ from 10 to 30 ° relative to the plane P.

In the embodiment shown, the threads 38a, 38b, 38c define contours, in longitudinal section, symmetrical with respect to the plane P, the angles α ₇ α ₈ of inclination of the surfaces 39, 41 relative to this plane being of About 20 °.

At the base of the skirt, below the threads 38a, 38b, 38c, a shoulder 42 is provided so that the thickness e ₂ of the lower end of the skirt is substantially equal to the thickness e ₃ of the skirt , between the nets.

This shoulder makes it easier to guide the plug when of its implementation and is part of the means allowing to avoid overstepping.

Frangible bridges 35 connecting the strip tamper evident 34 to the side skirt 32 are triangular conical.

Examination of Figure 5 shows that these bridges 35 have a trapezoid shape in lateral or radial view the two sides 43, 44 of which are symmetrical to one another with respect to a radial plane R.

Figure 7 shows that the cross section high bridges, in their area of association with the edge lower of the skirt 32, is of homothetic surface and less than the lower cross section of these bridges, in their area of association with the inviolability band 34.

In other words, this cross section, substantially triangular, bridges 35, is surface decreasing from base 45 to summit 46 of bridges 35.

More precisely, each bridge 35 is limited, towards the inside of the cap, by a surface substantially vertical 47 of trapezoidal outline, and is limited, towards the outside of the stopper, by an inclined surface 48.

The inclined surface 48 is such that each bridge 35 has symmetry with respect to a radial plane R.

The angle between the inclined surface 48 and the vertical is, in this radial median plane R, of the order of 10 °, as shown in Figure 10.

The base surface 45 of the bridges 35 extends over a thickness less than that of the tamper-evident band 34.

The dimensioning of bridges 35 presented above ensures a rupture of these bridges, at the first unscrewing, near the bottom edge of the skirt side, the cap once unscrewed therefore not comprising little or no reliefs at the base of this skirt.

Frangible bridges can be chosen from different section, in other embodiments.

These bridges can for example be cylindrical, prismatic with square, rectangular or triangular base.

Frangible bridges 35 are arranged between support zones 49.

During the screwing, the tamper-evident ring is pressed against the plug at the support zones 49 under the effect of pressure which decreases the forces of shear that usually occurs on bridges 35.

The support zones 49 thus make it possible to minimize the size of the bridges 35, to provide comfort in use by lowering the effort required to break these bridges.

The conical triangular shape of bridges 35 is calculated to avoid unscrewing at an angle, the slope of the inclined surface 48 facilitates the priming of break in the direction of unscrewing.

Frangible bridges 50 of rectangular section are arranged between the bearing surface 49 and the face lower 51 of the skirt 32.

These bridges 50 are constrained during the setting in place of the plug, which further limits the effort applied on frangible bridges 35.

The tamper-evident ring has, projecting internal, notches 52 coming to lock in the notches 22 from the neck of the bottle 1 at the start of the first unscrewing.

These notches 52 have a rear face 60 and a front 61.

The terms "front", "rear" are used here in reference to screwing direction V.

The rear face 60 is substantially radial and defines an angle β ₁ of the order of zero to a few degrees relative to the radial direction.

The front face 61 is inclined at an angle β ₂ relative to the radial direction, β ₂ being of the order of 50 °.

When placing the cap on the bottle, on the packaging line, the front surface 61 of each notch 52 can slide on the rear surface 26 of the corresponding projection 24 of the neck (screwing direction V).

Conversely, during the first unscrewing, the surface rear 60 of each notch 52 will come up against the front surface 27 of the corresponding projection 24 of the neck.

So the tamper-evident ring can no longer turn. The continuation of the unscrewing effort leads to separation of the ring from the skirt, by breakage of frangible bridges 35 and bridges 50.

In one embodiment, there is a space (i) between the lower surface 62 of the ring 34 and the lateral surface of the body 2. So that the ring 34 "drops" when the cap is opened for the first time, which facilitates the detection of a fraudulent opening or malicious.

Thus, after the bridges 35 have broken, the ring 34 is free on pass 5, which allows you to view the opening.

The ring 34 remaining on the neck 5 cannot be accidentally mix with the contents of the vial.

In particular, when the bottle is turned over, the ring remains associated with the bottle, even when shaking manually the bottle, in particular due to the contact between the base of the shoulder 20 and the upper surface 63 of each notch 52.

The stopper can be manufactured by injection.

The size of the cap depends of course from that of bottle 1.

• diamètre sur filet D'₁ : 92,9 mm ;
• diamètre en fond de filet D'₂ : 96 mm ;
• hauteur des crans h₁₀ : 4,73 mm ;
• hauteur de la jupe 32, h₁₁ : 18,8 mm ;
• hauteur totale du bouchon h₁₂ : 26,3 mm ;
• départ filet : 15,75 mm ;
• trois filets s'étendant sur 285° ;
• pas h'₄ : 12 mm ;
• diamètre maximum, stries 37 comprises D₈ : 100,3 mm ;
• dix ponts frangibles 35 ;
• dix zones d'appui 49 ;
• hauteur des ponts 35 : 0,6 mm.

As an indication, the following dimensions are given, for one embodiment:

• diameter on thread D ' ₁ : 92.9 mm;
• diameter at the bottom of the thread D ' ₂ : 96 mm;
• notch height h ₁₀ : 4.73 mm;
• skirt height 32, h ₁₁ : 18.8 mm;
• total height of the plug h ₁₂ : 26.3 mm;
• net start: 15.75 mm;
• three threads extending over 285 °;
• pitch h ' ₄ : 12 mm;
• maximum diameter, including streaks 37 D ₈ : 100.3 mm;
• ten frangible bridges 35;
• ten support zones 49;
• bridge height 35: 0.6 mm.

The 1-cap bottle assembly 30 has improved tamper and sealing characteristics compared to the known assemblies of the prior art, for bottles whose neck can have a large diameter, on the order of 4 to 20 centimeters.

A seal, not shown, can be sealed on the neck 5, thus blocking the end orifice 6.

The sealing of this seal is facilitated by the sealing area with bevel gear defined by lip 10.

The seal can be obtained by gluing, induction, thermal, ultrasonic or high welding frequencies, or equivalent.

The cover may be tearable and / or peelable.

If necessary, the cover can be repositioned.

The cover may include a tab facilitating its removal or a thinner line facilitating its smashing.

The cover may be made of a material mono or multilayer polymer, or composite polymer / metals to ensure, for example, good tightness, in particular to gases and water vapor, in multilayer paper cardboard.

In one embodiment, the cover is in aluminum.

The combination of the tamper-evident ring 34 and the seal leads to an integrated double inviolability.

• l'étanchéité après ouverture de l'opercule aluminium ;
• l'étanchéité en l'absence de joint.

The sealing area with bevel gear, formed by the lip 10 ensures:

• sealing after opening the aluminum seal;
• tightness in the absence of a seal.

This tightness is obtained in particular by crushing of the lip 10 in contact with the projection inner ring 65 of the plug, disposed near the bottom wall 31, at a distance b therefrom.

The fitting of the cap 30 on the bottle 1 can be manual but is easily mechanized.

The cap can be screwed or clipped thanks to the angle of the threads and the rigidity of the neck 5.

The slope 64 at the base of each notch 52 of the ring inviolability facilitates passage over the shoulder 20.

This slope 64 is inclined by an angle β ₃ of the order of 35 °, in the embodiment shown.

Third turn screwing and bridge calibration 35 make it possible to avoid screwing and unscrewing at an angle, even for large cap and neck diameters.

When the cap 30 is in place on the bottle 1, the side skirt 32 is, in the embodiment shown, in the vertical extension of the wall lateral 4 of body 2, which improves the aesthetics of the whole compared to existing products.

Body 2 cape 30 alignment can be obtained, in an embodiment, using a mold retractable cores for the production of the cape 30.

• de préserver des hautes cadences, typiques de celles accessibles par des moules à dévissage, le moule à noyaux rétractables étant moins coûteux que les moules à dévissage ;
• de ne pas solliciter les ponts (35) ou les pontets (50) lors du démoulage, de sorte que le dimensionnement des pontets peut être réalisé au plus juste d'où un meilleur confort d'utilisation.

The use of a mold with retractable cores allows in particular, in addition:

• to preserve high rates, typical of those accessible by unscrewing molds, the mold with retractable cores being less expensive than the unscrewing molds;
• not to stress the bridges (35) or the bridges (50) during demolding, so that the sizing of the bridges can be made as tight as possible, hence better comfort of use.

Claims (20)

Container of the type comprising: a bottle (1) having a threaded neck (5) defining an end opening (6) of large diameter, typically between 4 and 20 centimeters; a stopper (30) whose side skirt (32) has threads (38a, 38b, 38c) complementary to the threads (9a, 9b, 9c) of the neck (5) of the bottle (1), said bottle (1) and said stopper (30) being made of plastic,
characterized in that the neck (5) of the bottle (1) comprises a zone (21) with notches (22), these notches (22) being separated by projections (24); the plug (30) comprises a tamper-evident ring (34) connected to the skirt (32) by frangible bridges (35), said ring (34) being provided with a plurality of notches (52) located and directed towards the 'outside of the ring (34); the notches (22) and the projections (24) of the neck (5) cooperating with the notches (52) of the ring (34) so as to interfere during the first unscrewing of the plug (30), while allowing the bridges to break (35), the end opening (6) of the bottle (1) being delimited by a lip (10) inclined relative to a transverse plane P to the stopper (30), this lip (10) having the function, firstly, of receiving and ensuring the joining of an original closure cap of the bottle (1) and, secondly, the seal having been removed when the bottle was first unscrewed (1), to form a sealing surface cooperating with the plug (30). Container according to claim 1, characterized in that the plug has no seal, sealing being ensured by crushing the lip (10) by screwing the cap (30). Container according to claim 1 or 2, characterized in that the lip (10) comprises, starting from the edge of the end orifice (6): a first face (13), inclined at an angle (α ₁ ) relative to the transverse plane P; a second face (14), inclined at an angle (α ₂ ) greater than (α ₁ ), relative to the transverse plane. Container according to claim 3, characterized in that the angle (α ₁ ) is between 1 and 20 °. Container according to claim 4, characterized in that the angle (α ₁ ) is substantially 15 °. Container according to any one of Claims 3 to 5, characterized in that the angle (α ₂ ) is between 40 and 60 °. Container according to claim 6, characterized in that the angle (α ₂ ) is substantially 45 °. Container according to any one of Claims 1 to 7, characterized in that the notches (52) are six in number, the notches (22) and the projections (24) of the neck (5) being six in number. Container according to claim 8, characterized in that the notches (22) and the projections (24) of the neck (5) are regularly distributed around the circumference of the neck (5). Container according to any one of Claims 1 to 9, characterized in that the bridges frangibles (35) are triangular conical and are limited towards the inside of the stopper, by a surface substantially vertical (47) of trapezoidal outline, and outwards of the plug (30), by a surface (48) inclined relative to vertically. Container according to claim 10, characterized in that the angle of inclination of the surface (48) by ratio to the vertical is between 5 and 15 °. Container according to claim 11, characterized in that the angle of inclination of the surface (48) by relative to the vertical is approximately 10 °. Container according to any one of Claims 1 to 12, characterized in that areas bearing (49) of the ring (34) on the skirt (32) are arranged between the frangible bridges (35), so that, when the stopper (30) is placed on the bottle (1), the ring (34) is pressed against the skirt (32) at the level of the support zones (49), which reduces the forces of shear on frangible bridges (35). Container according to any one of previous claims, characterized in that the bottle is made from a material chosen from the group comprising: polyvinyl chloride, polyolefins such as low density polyethylene, high polyethylene density, or mixture of low and high density polyethylene, cellulose triacetate, acrylic polymers, polycarbonate, bi or tripolymer complexes, polypropylene and its copolymers, polyethylene blends polypropylene. Container according to claim 14, characterized in that the bottle is produced by blow molding. Container according to any one of previous claims, characterized in that the plug (30) is made of a material chosen from group comprising: polyvinyl chloride, polyolefins such as low density polyethylene, high density polyethylene, or polyethylene blend low and high density, cellulose triacetate, acrylic polymers, polycarbonate, bi or tripolymers, polypropylene and its copolymers, polyethylene polypropylene blends. Container according to claim 16, characterized in that the plug (30) is produced by injection. Container according to any one of Claims 1 to 17, characterized in that the neck (5) has at least two threads (9a, 9b, 9c), the plug (30) comprising three complementary nets (38a, 38b, 38c). Container according to any one of Claims 1 to 18, characterized in that the plug (30) is produced in a retractable mold. Container according to claim 19, characterized in that the side skirt (32) of the plug (30) is in the vertical extension of the side wall (4) of the body (2).

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