CN101258077A - Stop device for container neck, container incorporating such device, and method of manufacturing such device - Google Patents

Abstract

The invention relates to a device, the skirt (12) of which is provided with a peripheral area of weakness (16) adapted to break when said device is opened for the first time, on one side of which area of weakness the skirt comprises a A first part (14) adapted to be separated from the neck after the region has been broken, and on the other side comprises a second part (15) provided with a tongue (17) which runs from the inner surface of the skirt towards the first part protrudes and is adapted at the free end (17B) of this tongue to abut an associated shoulder (8) on the neck to retain the second skirt around the neck when the device is first opened. In order to ensure a firmer and more reliable hold of the second skirt, the tongue has, in the longitudinal section of the skirt, the necessary curved shape which is convex towards the first skirt (14).

Description

Stop device for container neck, container incorporating such device, and method of manufacturing such device

technical field

The present invention relates to a device for stopping the neck of a container, to a container incorporating such a device, and to a method of manufacturing such a device.

Background technique

The present invention relates more particularly to such a device comprising a skirt surrounding the neck of a container and having a bottom portion which, when the neck rim extends vertically upwards, It is designed to remain around the neck when the device is opened for the first time, while the rest of the skirt, i.e. the top of the skirt, is designed to be removable from the A weak area that breaks when the device is first opened is connected to the non-removable bottom of the skirt. The breakable area serves as a marker for the first use of the device to the consumer's attention, while the non-removable skirt, especially when the non-removable skirt has a significant length, can be used to cover the corresponding area of the neck appearance purpose. In this regard, the invention is particularly, but not exclusively, applicable to the field of packaging wines and spirits in glass bottles, which usually have a neck covered in a long skirt by a non-removable bottom.

In order to hold the bottom skirt around the neck, it is known to abut internal projections on said skirt with associated enlargements on the neck. Where the length of the skirt is longer, i.e. the skirt extends lengthwise downwards beyond the bulge on the aforementioned neck, usually the projections for retention are provided integrally molded with the main part of the skirt form of the tongue. An example of such a skirt is shown schematically in Figure 7, where the skirt comprises a top 101 separated from a bottom 102 of the skirt by a breakable line of weakness 103 indicated by a broken line. The bottom is provided with a tongue 104 of the type described above protruding from the inner surface of the part 102 towards the top 101 . When opening the stopper comprising the skirt for the first time, the user pulls the top 101 upwards as shown by arrow 105, thereby helping to break the thread 103, while the tongue 104 passes the transverse shoulder on the neck 107 abuts to help retain the bottom 102 around the container neck 106.

But in fact, the skirt 102 is not always effectively held by the tongue 104 because the tongue recedes by turning over before the line 103 bends and breaks. This is due to stresses applied to the tongue by the skirt 101 being dragged in an upward direction 105, and/or due to dimensional deviations of the various necks on which the skirt is mounted. Thus, as shown in FIG. 7 , the tongue transitions from an initial shape shown in solid lines and having a substantially rectangular cross-section to a convex side-down curved shape shown in dashed lines, with the skirt 102 opposing the portion 101 together. The neck 106 is dragged upwards. When the tongue has such a downwardly convex curved shape, the tongue no longer provides any vertical resistance against the shoulders 107, so that the shoulders continue to deform the tongue until the tongue is turned downwards as dotted in FIG. The position shown by the line, where the connection area between the tongue and the skirt 102 forms a kind of flexible hinge with no resistance.

When the skirt is made of plastic material, the tongue 104 often has a tendency to give way under the stress of first opening the device due to the relative structural flexibility of the skirt, as indicated by arrow 108. The skirt is deformed radially outward near the tongue. This problem is particularly pronounced when the skirt is obtained by moulding, wherein the tongue 104 protrudes downwards from the inner surface of the skirt when it is demoulded. In these cases, the tongue 104 needs to be folded upwards before the stop means including the skirt is placed around the neck 106, so that the tongue assumes the initial configuration shown in solid lines in FIG. 7, which means that the The connection area between the tongue and part 102 must deform like a hinge. The tongue then more easily yields elastically when the device is opened for the first time, to return to the configuration which the tongue had when it was removed from the mould, approximately corresponding to that shown by the dot-dash line.

Other examples of skirts internally provided with one or more retaining tongues are shown in EP-A-0410059, US-A-5129530, and US-A-5007545. The tongues disclosed in these documents all have the shape of a portion of material coming from the inner surface of the skirt and folded over the body portion of the skirt at an acute angle along a fold line perpendicular to the connection to the central longitudinal axis of the skirt of the radius. Said portion of material thus consists of a base connected to the skirt via a flexible hinge region, and a free end hingedly connected to the base along a fold line. In practice, the annular fold line is made by properly forming the tongue from its rectilinear configuration obtained at the end of molding and similar to the demolded configuration shown in dotted lines in Figure 7 .

When the stop means of the above three documents are opened for the first time, the tongues are deformed by folding their free ends towards the base along annular folding lines defined by the polygonal shape of the cross-section of these tongues. Thus, only the free ends of the tongue contribute effectively to retaining the skirt for permanent retention around the neck of the container, with the risk that these ends will give way under the stress of being fully folded back against the base, while, by The leverage around the angled fold line, the base against the skirt creates a substantially radially outwardly directed stress at the flexible hinge region (in a similar manner to that shown by arrow 108 in Figure 7). These local stresses cause the elastic material constituting the skirt to locally whiten in such a way that it can be observed from the outside of the skirt, which greatly spoils the appearance of the skirt and makes the skirt unsuitable for packaging where in principle the bottle needs to be attractive. Domain of wine and spirits.

Contents of the invention

The object of the present invention is to propose a stop device with a tongue of the above-mentioned type, which ensures firm and reliable retention of a skirt provided with a tongue, without impairing the appearance of said skirt.

To this end, the invention proposes a device for stopping the neck of a container as defined in claim 1 .

With the device of the invention, and assuming that the longitudinal axis of the skirt extends vertically, wherein the first part of the skirt is located above the second part, the or each tongue has a curved shape with the protruding side facing upwards, it is possible to ensure Maintain considerable strength in the second part of the skirt. When the device is opened for the first time, the tongue is in axial abutment with the associated enlargement of the neck, the stresses acting on the tongue are cushioned by the curved shape of the tongue which tends to flex the tongue To increase the curvature of the tongue shape, thereby increasing the strength of the tongue, until the weak area between the two skirts breaks. In other words, when the device of the present invention is opened for the first time, the initial curved shape of the tongue forces the tongue to act in a way that flexes, tending to increase the curvature of the tongue shape. Since the tongue abuts at its free end the associated enlargement of the neck, the opposite flexing movement, ie the tendency to reduce and then reverse the curvature of the tongue section is mechanically impossible. It should be understood that extending over the entire projected width of the tongue and in a consistent manner - that is, without any discontinuity of curvature from the free end of the tongue to the end where the tongue connects to the skirt - towards the inside of the skirt A curved curved shape functions by utilizing an overall flexing motion by changing the overall curvature of the shape. In particular, the consistent dynamic behavior of the tongue means that it is not possible to distinguish the free ends from the base along the projection width of the tongue, which have a specific deformation behavior which differs from each other.

This curved shape also has the advantage of being able to transmit thrust to the part of the skirt above the tongue which can be thicker and stronger than the part below the tongue. In particular, these thrusts compress the skirt with an insignificant or even negligible radial component, thereby limiting outward radial deformation of the skirt at the tongue and thereby reducing any plastic material deformation. white risk.

Further features of the device which are advantageous individually or in any technically feasible combination are specified in the dependent claims 2 to 13 .

The invention also provides a container comprising a neck provided with the above defined stop means for the neck.

The invention also provides a method of manufacturing a device for stopping the neck of a container as defined in claim 15 .

Thus, the method of the invention makes it possible to quickly obtain a skirt made of plastic material that can be placed around the neck of a container. The various operations of the method, such as molding the skirt and folding back the tongue, can be performed using substantially axial movements so that, in practice, the method can be performed automatically without degrading the quality of the method execution.

The features of the method are specified in claim 16 .

Description of drawings

The invention may be better understood by reading the following description, given by way of example only, in conjunction with the accompanying drawings, in which:

Figure 1 is a longitudinal section of the stop device of the invention shown around the neck of a container, the right half of the figure showing the stop device in assembled configuration on the neck and actually in place around the neck, While the left half shows the state of the device before reaching the configuration shown in the right half;

Figure 2 shows the detail II circled in Figure 1 on an enlarged scale;

Fig. 3 is a view similar to Fig. 1 showing a variant of the stop device of the present invention, shown fitted around the neck of the container and before first opening;

Fig. 4 is the perspective view before the outer bottle cap of device among Fig. 3 is assembled with other components of this device;

Fig. 5 is a partial longitudinal sectional view of the bottle cap of Fig. 4;

Figure 6 is a view similar to Figure 4 showing another variant of the cap of the device of the present invention; and

FIG. 7 is a view similar to FIG. 2 showing an example of the prior art described above.

Detailed ways

Figures 1 and 2 show a stop device adapted to be releasably screwed on the neck 2 of a container 3, such as a bottle made of glass or the like for containing alcoholic beverages, especially wine. Said neck has a generally cylindrical shape about a longitudinal axis X-X.

In the following description, for the sake of convenience, it is assumed that terms such as "top" and "upward" correspond to directions generally parallel to the axis X-X from the body of the container 3 towards the neck 2 of the container, i.e. along the lines of Fig. 1 and 2 in the upward direction; whereas the terms "bottom" and "downward" correspond to opposite directions. The same convention is used in Figure 3-6.

At the top of the container, the neck 2 defines a rim 4 from which the liquid contained in the container 3 is poured. The outer surface of the neck is provided successively in a downward direction with a helical thread 5 and a ring 6 each protruding radially outward. A transverse shoulder 8 is formed at the transition between the bottom end of the ring and the remainder of the neck forming an elongated portion 7 having a frustoconical outer surface flared downwards about axis X-X, Said transverse shoulders are slightly upwards away from the axis X-X and are inclined with respect to a plane perpendicular to said axis.

The stop device 1 consists of three distinct parts, namely the outer cap 10 , the insert 20 , and the optional sealing plate 30 , which are designed to be assembled coaxially with each other and then mounted together on the neck 2 .

Both cap 10 and insert 20 are generally cylindrical about a longitudinal axis which, as shown, substantially coincides with axis X-X when device 1 is assembled and mounted on neck 2 . Both the cap and the insert are open at the bottom and closed at the top by respective end walls 11 and 21 each having a cylindrical skirt 12 centered on the axis X-X and extending axially downward from the periphery of each end wall ,twenty two.

The insert 20 is adapted to be inserted inside the cap 10 and to be permanently held in position in the cap both axially and during rotation about the axis X-X. These two parts then form an integral stop 40 in which the wall 11 and the skirt 12 cover the outer surfaces of the wall 21 and the skirt 22 . The insert can be held in place on the inside of the bottle cap by heat sealing, in particular using ultrasound, by adhesives, or by complementary shapes between the walls 11, 12, 21 and 22, upon application and in the name of the applicant. These means are described in detail in French patent application numbered 04/03154.

A sealing sheet 30 is accommodated inside the insert 20 against the end wall 21, optionally with an adhesive layer between the sealing sheet and the end wall. Advantageously, the insert is provided with radially inwardly projecting lips 23 from the top of the skirt 22, these lips 23 serving to retain the sealing disc axially downwards to prevent the latter from falling out from inside the insert. Details of the manufacture of these lips are given in French Patent Application No. 04/03154 mentioned above.

The bottom of the inner surface of the skirt 22 is provided with a thread 24 projecting radially inwards and complementary to the external thread 5 on the neck 2 so that the stop 40 is adapted to be screwed onto and from the neck. Down. To make the stop easier to handle, the bottom of the outer surface of the skirt 12 is advantageously provided with a longitudinal groove 13 .

The skirt 12 is longer than the skirt 22 so that in the assembled state of the device 1 the bottom of the skirt 12 extends to a greater distance below the axial position of the bottom end edge 25 of the insert 20 to start from the rim 4 of the neck 2 Covering the neck 2 and the elongated portion 7 of this neck.

When the device 1 is opened for the first time, the skirt 12 is adapted to be divided into two distinct parts of approximately the same length, namely a top 14 integral with the end wall 11 and a bottom 15 initially connected to the top 14 by a line of weakness 16 , said line of weakness is schematically represented by dashed lines in FIGS. 1 and 2 . In the body of the skirt 12, this line of weakness 16 is arranged a short distance below the position of the bottom end edge 25 of the insert 20 along the axis X-X, so that when the device 1 is assembled, the top 14 of the skirt alone accommodates the entire insert 20 .

In practice, the line of weakness 16 is formed by, for example, a breakable bridge or a circumferential cut or notch made through the wall of the skirt 12 .

In order to separate the parts 14 and 15 by breaking the line of weakness 16 when the device 1 is opened for the first time, the bottom 15 is opposed by a tongue 17 integrally formed with the main part of the bottom 15 and protruding from the inside surface of the main part. It is held axially on the neck 2 . The tongue extends upwards towards the axis X-X when the device 1 is in the assembled configuration as shown in the right-hand part of Figure 1 and downwards when the device is in the pre-assembled configuration as shown in the left-hand part of Figure 1 extend.

The thickness of the tongue 17, i.e. the smallest dimension of the tongue in the plane of FIGS. The width is the distance between the end 17A of the tongue connected to the skirt wall 15 and the free end 17B of the tongue. In a section radially relative to the axis X-X, ie in the plane of FIGS. 1 and 2 , the tongue 17 does not present a rectangular section, but has an upwardly convex curved shape. Thus, in this plane, the tongue 17 assumes an arcuate shape corresponding to approximately one-eighth of a circular arc, it being observed that the tongue 17 is bent towards the axis X-X and downwards in FIG. 1 , i.e. towards the body of the container 3. curved at the top. It is emphasized that Figures 1 and 2 and Figures 3 to 6 hereinafter, which describe and clearly illustrate the curved shape of the invention, are schematic views with respect to the exact dimensions of the tongue. Where appropriate, one skilled in the art can refer to the details given herein to quantify the relative size of the tongue.

In other words, the top surface of the tongue 17 is necessarily convex, while the bottom surface of the tongue is necessarily concave. More precisely, the free end 17B of the tongue and the body portion 17C are respectively convex top surfaces on one side and concave bottom surfaces respectively on the opposite side; Opposite surfaces having a changed direction of curvature.

The tongue 17 is dimensioned and axially positioned along the skirt 15 such that the end 17B of the tongue is flush with the shoulder 8 when the device 1 is in the assembled configuration and said device is mounted around the neck 2 . In fact, according to the exact dimensions of the neck 2, in particular with regard to its ring 6 and its shoulder 8, and according to the dimensions of the device 1, the end 17B of the tongue is immediately below the shoulder 8, wherein the tongue is only in contact with The shoulders touch, and any functional gaps can be ignored.

The bottle cap 10 is made of a semi-rigid plastic material such as polypropylene or polyethylene, polyethylene being preferred especially for reasons of appearance. The cap 10 is obtained by molding plastic material so as to simultaneously form the end wall 11 and the skirt 12 when formed, in particular with a molded tongue 17 having a curved shape. By extending the tongue when leaving the mould, in the position shown in Figure 1, ie with the free end 17B of the tongue pointing downwards, it is easier to remove the cap from the mould.

Before or after inserting the sealing sheet 30 into the insert 20, assembling the stopper device 1 includes placing the insert on the skirt of the cap 10 by axially introducing the insert and forcing the insert into the cap from its open bottom end. 12, wherein the bottle cap is in the state when it leaves the mould. The tool used to perform this insertion then advantageously ensures that the tongue 17 is folded upwards, so as to assume the state of the tongue shown in the right-hand part of FIG. 1 . The device 1 is then in a configuration for assembly to the neck 2 .

Then, the stop 40 comprising the insert 20 held in place in the bottle cap 10 is mounted on the neck 20 by screwing so that first the tongue 17 comes under the shoulder 8 on the neck and then the sealing plate 30 Axially compressed between the rim 4 and the end wall 21 of the insert, the bottom surface of this sealing plate advantageously defines a hollow annular recess 31 complementary to said rim. The skirt 12 then covers the neck including the neck elongation 7 .

To open the device 1 , the user unscrews the stop 40 , ie turns the stop about the axis X-X by gripping it by means of the slot 13 . When the device is opened for the first time, the upward movement caused by the unscrewing of the stopper and indicated by the arrow 50 in FIG. 2 separates the two parts 14 and 15 of the skirt by breaking the line of weakness 16. . When the top 14 is driven upwards, the bottom 15 is held axially by its tongue 17 which abuts axially against the shoulder 8 of the neck 2 . Under the action of the upward movement, the portion of the tongue having an upwardly convex shape causes the tongue to flex so that the curvature of the tongue increases so that the tongue changes from its original curved configuration as shown by the solid line in FIG. The type transitions to a more flexed configuration as shown by the dotted line in Fig. 2. At the end 17B of the tongue, an axial force sufficient to break the line of weakness 16 needs to be applied in order to obtain the outwardly and upwardly directed tongue deflection indicated by arrow 51 . In other words, this deflection serves to provide the force required to hold the bottom 15 of the skirt relative to the shoulder 8 until the line of weakness 16 breaks.

It will be appreciated that the curved shape of the tongue causes an overall flexing of the tongue, wherein the tongue is flexed under pressure in a consistent manner across its entire projected width. The continuous arcuate profile of this tongue curve shape demonstrates consistency in the dynamic behavior of the tongue. In practice, discontinuities in curvature are avoided in the tongue: it is preferable to limit the (curvature) variation to ±15% of the mean value of the curvature along the projected width of the tongue.

Similarly, it will be appreciated that a constant thickness of the tongue facilitates the effect of dynamic consistency. In practice, it is preferred to limit the (thickness) variation along the projected width of the tongue to ±10% of the mean value of the thickness.

Since the tongue 17 bends downwards towards the axis X-X, the increased flexing of the tongue will also advantageously bring the tongue between the end 17B and the body portion 17C as the skirt 12 moves upwards before the thread 16 breaks. bends more consistently across the overhang width between them.

In addition, the traction force transmitted to the skirt 12 is mainly via the region 15A of the bottom 15 between the line of weakness 16 and the tongue 17, i.e. at the tongue in the configuration of FIGS. 1 and 2 corresponding to the normal use configuration of the container 3. 17 below the area, to pass.

3 to 5 show a variant 100 of the stop device 1 of FIGS. 1 and 2 mounted about the neck 2 of a container 3 . For convenience, the same reference numerals are used for the same components in the apparatuses 1 and 100 . The device 100 differs from the device 1 primarily in its structure for holding the skirt 15: instead of having a single tongue like the tongue 17 extending continuously around the entire inside edge of the skirt, the skirt 12 of the device 100 is provided with multiple The paddle 171 is integrally formed with a strap 172 common to all paddles and itself integrally formed with the main body portion of the skirt 15 . As can be seen from Figures 4 and 5, the strap 172 protrudes from the portion 15 from the inner side surface 12A of the skirt 12 continuously towards the axis X-X around the entire inner side surface of the skirt.

The paddles 171 are identical to each other. Each paddle extends towards the axis X-X by protruding from the strap 172 . For structural reasons, these paddles are advantageously distributed in a substantially uniform manner around the inner periphery of the strip. Thus, the strap 172 connects each paddle to the inner side surface 12A of the skirt 12 via the skirt 15, while leaving void spaces 173 between successive pairs of paddles around the perimeter of the strap. Each strap portion 172 from which one of the paddles 171 extends, together with the associated paddle, forms a tongue 170 for retaining the skirt 15, which is functionally similar to the tongue shown in FIGS. 1 and 2 . Part 17 is similar.

The thickness e ₁₇₂ of the strap 172, i.e. the smallest dimension of the strap in the plane of FIGS. The other two dimensions of the strip, in particular in the above-mentioned plane, are substantially constant, wherein said end 172B is either connected to another paddle 171 or is free in an intermediate space 173 . Similarly, the thickness e ₁₇₁ of each paddle also remains constant between the end 171A of the paddle connected to the inner end 172B of the strap and the free end 171B of the paddle. Thicknesses e ₁₇₁ and e ₁₇₂ are substantially equal to facilitate molding and demoulding of the straps and paddles with the rest of the skirt 12 .

Between the inner end 172A and the outer end 172B of the strap 172, the strap has a width λ ₁₇₂ projecting inwardly from the inner side surface 12A of the skirt 12, which is less than the width λ 172 of each paddle 171 between the inner end 171A and the outer end 171A of the paddle. The dimension λ ₁₇₁ between ends 171B is the width by which the paddle projects inwardly from end 172B _of the strip.

The strip 172 and the respective paddle 171 extend continuously so as to extend towards each other towards the axis X-X in the plane of FIGS. 3 and 5 . In the configuration of FIG. 3 corresponding to the assembled configuration on the neck 2, the straps and paddles extend upwards towards the axis X-X, while before assembly as shown in FIGS. 4 and 5 corresponding to the molded configuration In configuration, the straps and paddles extend downwards for the same reasons given above for device 1 . In both configurations, each paddle together with an associated portion of the strap, ie each tongue 170, has an overall cross-section in the plane of FIGS. 3 and 5 of an upwardly convex curved shape. In the example shown, each tongue 170 has an arcuate profile corresponding approximately to one-eighth of an arc of a circle. Thus, as described above for the device 1 , when the device 1 is opened for the first time, the straps and paddles ensure high strength for holding the skirt 15 relative to the neck 2 , the flexing of the straps and paddles The profiles force them to function over the entire projected width with a general flexing movement which helps to further increase the curvature of said profiles.

The stop device 100 is assembled in a similar manner to the device 1 , in particular the strap 172 and the paddle 171 are driven upwards so that the tongue 170 enters the assembled configuration shown in FIG. 3 . When the straps and paddles are driven upward, significant stresses are exerted on the straps and paddles so that the straps and paddles elastically deform like a hinge at the strap ends 172A connected to the skirt 15, As shown by arrow 172C in FIG. 5 . When the skirt is demolded, non-negligible stresses are also applied to the areas of the material connecting the straps and the walls of the skirt 12 together. The magnitude of all these stresses is greater with the paddles 171 than with the void space 173 due to the structural drag created by the paddles. However, in order to avoid excessive stresses in the paddles, and above all in the part of the strap that connects each of said paddles to the skirt in radial section, the strap is used in particular in the rest of the strap These stresses are distributed in the portion, ie in the portion of the strip that protrudes radially towards the void space 173 in radial section. For the regions of the elastic material stressed in this way, in particular the outer surface regions of the skirt 15 which are flush with the strap ends 172A, the stress distribution measures described above limit the damage of these regions due to excessively high stresses, especially the deformation. white risk.

Since the strap 172 extends continuously around the entire inner periphery of the skirt 12, even if the resultant flexurally driven force applied to the strap is slightly offset with respect to the axis X-X, the stresses within the plastic material are maintained in a substantially uniform manner. The strips are distributed throughout the perimeter outline.

In the example shown in the figures, the projecting width λ ₁₇₂ of the strap is smaller than the projecting width λ ₁₇₁ of the paddle. In practice, however, the ratio between these widths can be adjusted according to the amount of stress desired during demoulding of the skirt and when the paddle is folded back.

The device 100 opens in a manner similar to that of the device 1 , particularly insofar as the overall flexing of the tongue 170 works.

Of course, modifications and variants to the stop devices 1 and 100 described above and their method of manufacture are conceivable. Examples are as follows:

- Unlike the example of Figures 1 and 2 in which the tongue 17 extends continuously around the entire inner periphery of the skirt 15, the variant 200 of the device 1 shown in Figure 6 includes extending the tongue discontinuously around the periphery of the skirt, This makes it possible to obtain a plurality of different individual tongues 270, advantageously uniformly distributed around the inner periphery of the skirt 12; each tongue 270 is thus functionally similar to a part of the tongue 17 or to one tongue 170, it can be observed that Unlike these tongues, each tongue 270 extends from its end 270A connected to the inner surface of the skirt to its free end 270B, without being connected to each other by a common peripheral strap or the like, such as strap 171;

· In order to limit the or each tongue 17 , 170 , 270 when the stop device is opened for the first time, especially if the diameter of the ring 6 is smaller than expected due to large deviations in the neck dimensions in a given batch Clamped radially in the vertical direction between the ring 6 on the neck 2 and the skirt 15 , the skirt 12 is internally provided with a plurality of protrusions 19 extending radially from the inner surface of the skirt 15 protrudes, and is substantially uniformly distributed around the inner periphery of the skirt; where there are multiple tongues 170 or 270, each protrusion 19 is positioned correspondingly to one of the tongues around the periphery of the skirt; along Axis X-X, each projection is located between the line of weakness 16 and the end 17A, 172A, 270A of the tongue connected to the skirt and is arranged substantially at the free end 17B of the tongue pointing upwards when pressed against the inner surface of the skirt , the height of 171B, 270B; thus, the free end 17B, 171B, 270B of the or each tongue 17, 170, 270 is kept radially away from the inner surface of the skirt 12 by providing the protrusion 19, thereby especially in the tongue The fact that the free end has a curved configuration protruding towards the protrusion 19 improves the reliability of the axial abutment of the free end with the shoulder 8 of the ring on the neck during the first opening of the device, so that in the appropriate In this case, the tongue can interfere with the protrusion quickly when opening for the first time; this arrangement is more effective than providing extra thickness at the free end of the tongue, which also makes it easier to mold the cap and demoulding;

· Tongues 17, 170 or 270 can be folded from their state out of the mould, to a state relevant to the configuration for assembling the device on the neck, by using a special tool for inserting the insert 20 The tools placed in the bottle cap 10 are different;

• Instead of providing the stopper 40 in two distinct parts intended to be permanently assembled to each other, the stopper can be made in a single part, wherein a skirt with a line of weakness and one or more tongues is similar to the thread 16 and tongue 17 of device 1, or tongue 170 or 270 similar to device 100 or 200; and/or

- In Figures 1 and 3, the bottom 15 of the skirt 12 may extend down a short distance below the tongue 17, 170 or 270; the portion 15 may even be interrupted immediately below said tongue; in other words, Region 15B may be very short or even non-existent.

Claims (16)

1. device (1 that is used for the neck (2) of backstop container (3); 100; 200), this device comprises the skirt section (12) of the elongation of being made by plastic material, this skirt section is used for around neck, and be provided with the peripheral weakness zone (16) that is suitable for fracture when described device is opened for the first time, in the side of this weakness zone along skirt section longitudinal axis (X-X), the skirt section is included in and is suitable for first skirt section (14) that separates with neck after weakness zone has ruptured, and comprises at opposite side and to be provided with at least one tongue (17; 170; 270) second skirt section (15) is being used for that described device is assembled in assembled configuration on the neck, and described tongue stretches out and be suitable for free end (17B at this tongue from second inner skirt surface towards first skirt section; 171B; 270B) with neck on the portion of expanding (8) axially be abutted against, when for the first time opening described device, to keep second skirt section around neck;

Described device is characterised in that, is being used for that described device (1) is assembled in assembled configuration on the neck (2), described or each tongue (17; 170; 270) in the vertical section of skirt section (12), have towards the curved shape of necessity of first skirt section (14) projection.

2. according to the device of claim 1, it is characterized in that described or each tongue (17; 170; The curved shape of necessity 270) has arc profile in the vertical section of skirt section (12).

3. according to the device of claim 2, it is characterized in that described arc contour approximation ground is corresponding to 1/8th circles.

4. each device is characterized in that described or each tongue (17 in requiring according to aforesaid right; 170; The curved shape of necessity 270) has basic unmodified curvature along this tongue width that (12) inside face stretches out from the skirt section.

5. according to the device of claim 4, it is characterized in that described curvature is along described or each tongue (17; 170; 270) the variation of stretching out width is limited in curvature aviation value ± 15%.

6. each device is characterized in that described or each tongue (17 in requiring according to aforesaid right; 170; 270) in the vertical section of skirt section (12), has basic unmodified thickness.

7. according to the device of claim 6, it is characterized in that described thickness is along described or each tongue (17; 170; 270) from the variation of stretching out width of skirt section (12) inside face be limited in thickness average value ± 10% in.

8. each device is characterized in that in requiring according to aforesaid right, is opening described device (1 for the first time; 100; 200) time, described or each tongue (17; 170; 270) be suitable for deflection between two limit configurations, in each limit configuration, tongue keeps the curved shape towards first skirt section (14) protruding necessity of this tongue in the vertical section of skirt section (12).

9. each device is characterized in that described or each tongue (17 in requiring according to aforesaid right; 170; 270) inside face with skirt section (12) forms, and be suitable for being converted to and be used for described device (1) is assembled in assembled configuration on the neck (2) with respect to the molded configuration that the skirt section is molded together from the remainder in tongue and skirt section wherein, wherein, described assembled configuration is different from molded configuration.

10. each device is characterized in that in requiring according to aforesaid right, is provided with the single tongue (17) that extends on the whole inside circumference of second skirt section (15).

11. according to each device among the claim 1-9, it is characterized in that the inside circumference around second skirt section (15) is provided with a plurality of independent tongues (270) discontinuously, these independent tongues advantageously distribute in the mode of basically identical around described periphery.

12. according to each device among the claim 1-9, it is characterized in that, be provided with a plurality of tongues (170), these tongues comprise and are positioned at its free-ended each paddle board (171), these paddle boards are connected to skirt section (12) inside face (12A) via the shared tape of all tongues (172), wherein, the longitudinal axis (X-X) of tape from described inside face towards the skirt section stretches out, and extends around the whole inside circumference of second skirt section (15).

13. each device is characterized in that second skirt section (15) are provided with at least one projection (19) integratedly in requiring according to aforesaid right, this projection is used for radially placing described skirt section and described or each tongue (17 in assembled configuration; 170; 270) free end (17B; 171B; 270B).

14. one kind comprises neck (2) and the device (1 that is used for this neck of backstop is installed; 100; 200) container (3), this device are according to each device in the aforesaid right requirement.

15. device (1 that is used for backstop container neck (2); 100; 200) manufacture method, wherein:

Moulded plastic material is to be formed for around the skirt section (12) of the elongation of neck, this skirt section is provided with peripheral weakness zone (16), this weakness zone is suitable for fracture when described device is opened for the first time, and in the side of this weakness zone along skirt section longitudinal axis (X-X), the skirt section is included in and is suitable for first skirt section (14) that separates with neck after weakness zone has ruptured, and comprises at opposite side and to be provided with at least one tongue (17; 170; 270) second skirt section (15), when leaving mould, this at least one tongue stretches out away from the direction of first skirt section (14) along the inside face from the skirt section; Then

Towards first skirt section (14) folding described or each tongue (17; 170; 270), extend towards described first skirt section up to the inner surface of tongue from the skirt section, like this, tongue is suitable at its free end (17B; 171B; 270B) with neck (2) on the portion of expanding (8) that is associated axially be abutted against, thereby when for the first time opening described device (1), keep second skirt section (15) around neck;

The method is characterized in that, during moulded skirt (12), described or each tongue (17; 170; 270) molded like this, make that in the longitudinal cross-section in skirt section tongue has towards the curved shape of necessity of first skirt section (14) projection.

16. the method according to claim 15 is characterized in that, uses to be suitable for being fixed at least a portion that the inboard plug-in unit (20) in skirt section (12) forms stop device (1), and during described plug-in unit inserts the skirt section, described or each tongue (17; 170; 270) be folded.

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