Bottle closure device with guarantee collar and antirefill valve

Abstract

 The device comprises a pourer body (7) which is locked in the orifice (2) of the bottle (3) by means of a tubular seal (8) at the lower end of which is the seat (18) on which the stop means (19) of the valve rests.
The pourer is locked elastically and leaktightly against the seal by its cylindrical wall (10) which includes an annular zone or band (14) that is designed to sever if the pourer is tampered with.
The seal (8) in turn is locked elastically and leaktightly in the orifice of the bottle by means of a series of elastic circular flanges (17) which both prevent the liquid from escaping and anchor the seal in the mouth of the bottle.
The tearing of the preferentially severable band (14) by illicit forcing of the pourer will detach the pourer from the bottle and allow the valve stop means (19) to escape when the liquid is poured out.
The presence of the elastic flanges on the seal means that the closure device can be adapted to different bottle mouths.

Description

[0001] The present invention relates to bottle closure devices of the type that comprise an antirefilling valve and a closure cap with a pilfer-proof guarantee collar.

[0002] Closure devices of this kind are known; their function is to make sure that the bottle, once opened with tearing of the collar, cannot then be illicitly refilled, for example with an inferior quality liquid, by tampering with the device.

[0003] However, the design of closure devices in normal use is such that they can be manipulated with comparative ease, which means that they give no guarantee as to the inaccessibility of the bottle.

[0004] Moreover, each of them can be used only for one specific bottle mouth, in the sense that a given closure device cannot be adapted to any bottle mouth other than that for which it was designed.

[0005] In any case, the structure of known devices is complex and their manufacturing costs are correspondingly high. The object of the present invention is to provide a novel closure device of the aforesaid kind which will eliminate these disadvantages and limitations.

[0006] According to the invention, the said object is achieved by a closure device provided with a pourer unit which is locked elastically and leaktightly inside the bottle mouth by means of a cylindrical wall which includes an annular zone or band that is designed to sever if the device is tampered with.

[0007] In a simple embodiment of the invention, the pourer unit includes a pourer body that comprises the cylindrical wall with its preferentially severable band and a tubular body designed to prevent leaks, to lock elastically against said cylindrical wall and to lock them both in the orifice of the bottle.

[0008] According to the invention, the tubular body is locked in the orifice of the bottle by means of a plurality of elastic circular flanges capable of bending upwards, as the pourer unit is inserted in the orifice, in such a way as to engage leaktightly and with pressure in the orifice of the bottle and thus both prevent the liquid from escaping and prevent the pourer unit from being withdrawn from the bottle.

[0009] Further characteristics and advantages of the closure device according to the invention will be made clear in the following description, which refers to the accompanying drawings in which a preferred embodiment of the invention is illustrated purely by way of example.

[0010] In the drawings:

• Fig. 1 is a longitudinal section through the closure device according to the invention, locked in position in the mouth of bottle;
• Fig. 2 shows the device shown in Fig. 1 with the closure cap removed from the bottle mouth;
• Fig. 3 is a longitudinal section showing half of the pourer having the preferentially severable band in a first embodiment;
• Fig. 4 shows the pourer in a sectional view similar to that of Fig. 3 with a preferentially severable band in another embodiment;
• Fig. 5 is a longitudinal section through a pourer having a preferentially severable band in a third embodiment;
• Fig. 6 is a plan view, seen through the line A-A, of the pourer shown in Fig. 5.
• Fig 7 is a view, half in longitudinal section and half in elevation, showing a modified embodiment of the closure device according to Figs. 1 and 2, before this device being applied to the mouth of the bottle.

[0011] With particular reference to Figures 1 and 2, the closure device basically comprises a pourer unit 1, which is locked elastically and leaktightly inside the orifice 2 or 2A of the bottle 3, and an aluminium closure cap 4 with an inner stopper 5, which is screwed onto the neck of the bottle. The cap is provided in a known way with a guarantee collar 6 which will be torn when the bottle is opened for the first time.

[0012] In detail, the pourer unit 1 consists of two components made of elastic plastics material: a pourer 7 for pouring out the liquid and a tubular body 8, hereinafter termed the seal, which provides leaktightness and interconnects the parts.

[0013] The pourer 7 is specially shaped and comprises a middle part 9 and an outer cylindrical wall 10 that is locked elastically and leaktightly inside the seal 8. These parts are locked to each other by a snap connection between the two opposing lateral surfaces, one of which, for example the outer surface of the wall 10, has parallel annular projections or lips 11, while the other, namely the inner surface of the seal 8, has an equal number of parallel annular grooves or recesses 12.

[0014] The seal 8 in turn is also locked elastically and leaktightly inside the orifice 2 or 2A of the bottle, as explained below.

[0015] The pourer terminates at its outer end in a circular flange 13 which is clamped leaktightly against the rim of the bottle when the closure cap 4 is screwed down.

[0016] One very important aspect of the invention is that the cylindrical wall 10 of the pourer, at a point close to its connection with the flange 13, has an annular band or zone 14 designed to break when said flange or the middle part 9 of the pourer are tampered with by a turning or pulling or other illicit action.

[0017] The severable band 14 may be embodied in a variety of ways. It is essential that it consists of an annular wall whose thickness is less than that of the rest of the wall 10 so as to provide a weak zone that will tear readily in the event of the pourer's being forced.

[0018] The severing of the flange causes the pourer 7 to separate from the wall 10, which however remains locked inside the seal 2. The result of this is that as soon as any attempt is made to pour out the liquid, the pourer 7 falls out of the bottle.

[0019] As will be understood, the result of this is to discourage any attempt to tamper with the closure device, since any interference with the product would be clearly visible.

[0020] The antirefill function of the bottle is thus guaranteed with absolute certainty.

[0021] In Figures 1 to 3 the preferentially severable band 14 is formed by a rounded groove, i.e. its thickness decreases gradually towards the interior (see in particular Fig. 3).

[0022] In Fig. 4 the preferentially severable band 14A takes the form of a rectangular groove, while in Figures 5 and 6 it takes the form of a band 14B comprising a series of bridges, that is a succession of sectors of a circle of reduced thickness 15 and sectors of a circle of normal thickness 16.

[0023] The preferentially severable groove may also be triangular or may take the form of a suitable preincision.

[0024] Fig. 5 also shows that the wall 10 has an annular depression 12A instead of a lip for the snap connection with a corresponding annular projection, not shown, on the seal.

[0025] Another aspect of the invention is that the seal 8 is anchored elastically and leaktightly inside the orifice of the bottle by means of a plurality of parallel circular elastic flanges 17 which jam against the inside of the orifice.

[0026] In the rest condition the flanges 17 assume a laterally extended position, their edges only slightly raised, so that when the seal 8 is placed inside the mouth of the bottle the flanges bend (flex) upwards, thereby both preventing the liquid from escaping and locking the seal inside the bottle.

[0027] To improve this locking action, the orifice of the bottle may include a widening at an intermediate level, as indicated at 2A in Fig. 2.

[0028] A great advantage of the elastic flanges 17 is that with suitable shape and dimensions, it is possible to use the same pourer unit for closing bottles whose mouths are within a wide range of dimensions, thanks to the elasticity of the flanges which enable them to adopt the right curvature for the orifice of the bottle.

[0029] For example, using a seal with an external diameter of approximately 18 mm and four or five flanges extending approximately 2.5 to 3 mm outwards with a slight taper, it is possible to close standard bottles whose orifices vary between approximately 19 mm and 22 mm.

[0030] At the lower end of the seal 8 is a circular seat 18 on which the free stop means 19 of the valve, normally consisting of a ball, rests in normal rest conditions.

[0031] Furthermore, and also close to the lower end, the seal has radial walls or fins 20 whose function is to guide the movement of the stop means when the liquid is being poured.

[0032] Turning now to the pourer, it should be noted that its middle part 9 has a recess 21 shaped like an upturned cup, whose lower rim 22 forms a stop or check for the stop means 19, as Fig. 1 makes clear.

[0033] The purpose of the recess 21 is to catch at least some of the liquid as it flows into the mouth of the bottle as pouring begins, and so promote a steady outflow of the liquid over the flange 13.

[0034] In order to make this outflow possible, the pourer is provided with apertures 23 distributed at angular intervals all around the connecting wall to which the flange 13 is joined.

[0035] The closure device is completed by the cap 4, the wedge-shaped annular lip 24 of whose inner stopper 5 closes leaktightly on the flange 13 and squeezes it against the rim of the bottle.

[0036] The inner stopper 5 has a projecting inner cylindrical wall 25 whose edge catches under the top edge of the apertures 23 and in an annular groove, not shown, formed in the wall containing these apertures.

[0037] The purpose of the wall 25 is to keep the unit consisting of the pourer 7 and the seal 8 firmly anchored to the cap 4 and also to help to seal the liquid inside the bottle.

[0038] The cap 4, the inner stopper 5, the pourer 7 and the seal 8 constitute a pre-assembled unit which is mounted in the bottle orifice in a single step when the mouth is being closed.

[0039] At the same time a rotating tool clinches and threads the cap on the neck of the bottle.

[0040] At this point the bottle is closed and to open it the cap must of course be screwed off, in which process the guarantee collar 6 will simultaneously be severed.

[0041] It will be clear from the above that the closure device according to the invention eliminates all the disadvantages and drawbacks of known devices.

[0042] It does this by providing an absolute guarantee of the bottle's being closed, for any attempt to tamper with the structure in order illicitly to top up with a liquid will tear the specially severable band, allowing the pourer 7 to come loose and the stop means 19 of the bottle to escape when the liquid is poured out. It is also possible to use one and the same device for different mouths of standard bottles.

[0043] Lastly, thanks to the very small number of components and to its structural simplicity, the proposed device is both extremely inexpensive and functional for the uses for which the invention is intended.

[0044] Reference has been made to a closure system employing a valve with stop means 19, but it will be obvious that this part may be omitted without affecting the system's guarantees represented by the severing of the pourer if any attempt is made to tamper with it.

[0045] A variant of the system of fitting the device is to form the closure in two stages, by first inserting the pourer-seal unit 7-8 in the mouth of the bottle, and then applying the aluminium cap 4 with a seal differing in shape and material to that indicated for the inner stopper 5.

[0046] A quite advantageous characteristic of the closure device according to the invention resides in the fact that the inner stopper 5 which is preferentially made of plastics material having a certain elasticity, is provided with a peripheral conical flange designated by 26 in Fig. 7. This peripheral conical flange 26 extends radially outwardly with respect to the flange 13 and the pourer 7, and flares downwards. The aluminium closure cap 4 is provided at a distance from the top thereof with an internal annular projection 27 which is made by suitably deforming radially the skirt of said cap 4. The peripheral conical flange 26 of the inner stopper 5 and the internal annular projection 27 in the aluminium closure cap 4 are appropriately dimensioned relative to each other, in such a manner that when the closure device is being assembled, the inner stopper 5 comes to be fitted into the cap 4, and the lower end edge of the peripheral conical flange 26 is caused, by being elastically compressed radially, to get over the internal annular projection 27 in the closure cap 4 and to be snappingly engaged with said projection 27. Thus, the peripheral flange 26 of the inner stopper 5 comes to be embedded in the aluminium closure cap 4 between the top and the internal annular projection thereof, so that the liquid pourer unit as a whole, which comprises the pourer 7 and the tubular body 8 with the valve stop means 19, is fastened by means of the inner stopper 5 to the interior of the aluminium closure cap 4. It is therefore possible to pre-assemble the closure device indipendently from a bottle, that is, to obtain a preassembled unit shown in Fig. 7, which can be handled and applied as such to the bottle mouth on closing a bottle.

[0047] The pourer unit is similarly fastenable to the aluminium closure cap 4, so as to obtain a pre-assembled unit according to Fig. 7. Such a similar fastening, however having a lesser strength, can be effected even without the provision of the internal annular projection 27 in said cap 4, so that the inner stopper 5 is fitted with a light force into the aluminium closure cap 4, and a frictional embedding therein of the inner stopper 5 is obtained by taking advantage of the elastic radial compressibility of the preferentially conical flange 26 thereof.

Claims

1. Bottle closure device of the type that comprises an antirefilling valve and a closure cap with a pilferproof guarantee collar, characterized in that it comprises a liquid pouring unit which is locked elastically and leaktightly inside the bottle mouth by means of a cylindrical wall (10) which includes an annular zone or band (14, 14A, 14B) that is designed to sever if the device is tampered with.

2. Closure device according to Claim 1, characterized in that the said liquid pouring unit includes a pourer body (7) that comprises externally said cylindrical wall (10) and a tubular body (8) situated between said wall and the orifice (2, 2A) of the bottle in order to prevent leaks, to lock the parts together and to lock them both in the orifice of the bottle.

3. Closure device according to Claim 2, characterized in that the tubular body (8) has an inner surface designed to form an elastic leaktight connection with the outer surface of the cylindrical wall (10) of the pourer and an outer surface designed to form an elastic leaktight connection in the orifice of the bottle; said tubular body being also provided at its lower end with a seat (18) on which the movable stop means (19) of the valve, where provided, rests.

4. Closure device according to the previous claims, characterized in that the cylindrical wall of the pourer is locked inside the tubular body by means of a snap connection (11, 12).

5. Closure device according to one or more of the previous claims, characterized in that the annular preferentially severable band (14, 14A, 14B) of the cylindrical wall of the pourer is formed by a thickness which is less than that of said wall.

6. Closure device according to Claim 5, characterized in that the lesser thickness of the annular band is formed by a continuous recess or an interrupted recess (bridges).

7. Closure device according to Claim 6, characterized in that the form of the recess is rectangular or curved or tapering or a combination.

8. Closure device according to one or more of Claims 1 to 4, characterized in that the preferentially severable band of the pourer is formed by pre-incision.

9. Closure device according to one or more of Claims 1 to 4, characterized in that the tubular body (8) is locked in the orifice of the bottle by means of a plurality of elastic circular flanges (17) capable, during use, of bending (flexing) upwards in such a way as to engage with pressure against the inner surface of the orifice (2, 2A) of the bottle so as to prevent the liquid from escaping and prevent the pourer unit from being withdrawn from the bottle

10. Closure device according to Claim 9, characterized in that the circular flanges are of suitable shape and dimensions to enable the same device to be used for closing bottles whose mouths are within a wide range of dimensions.

11. Closure device according to one or more of the previous claims, characterized in that the tubular body has inner radial fins (20) whose function is to guide the movement of the stop means (19) when the liquid is being poured.

12. Closure device according to one or more of Claims 1 to 4 and 9 to 11, characterized in that the pourer body (7) also includes a shaped middle part (9) situated above the valve and having a recess (21) shaped like an upturned cup that joins on the outside with a circular flange (13) via a wall containing apertures (23) through which the liquid can be poured out; said flange being pressed onto the rim of the bottle by the closure cap (4, 5), while the lower rim (22) of said recess forms a stop for the valve stop means (19).

13. Closure device according to the previous claims, comprising a cap (4) which screws onto the neck of the bottle and is provided with a guarantee collar (6) and an inner stopper (5), characterized in that the inner stopper has both a circular flange (24) which presses leaktightly against the flange (13) of the pourer and an inner cylindrical wall (25) that snaps elastically into engagement with the wall of the pourer body which has apertures (23) through which the liquid can be poured out.

14. Closure device according to the previous claims, characterized in that the inner stopper (5) is provided with a peripheral flange (26) that is elastically compressible in the radial direction and cooperates with the aluminium closure cap (4).

15. Closure device according to claim 14, characterized in that the inner stopper (5) is made of plastics material having some elasticity, and its peripheral flange (26) is conically shaped and flares downwards.

16. Closure device according to claim 14 or 15,characterized in that the aluminium closure cap (4) is provided in proximity of its top with a preferentially annular internal projection (27), and the peripheral flange (26) of the inner stopper (5) is snappingly engageable with said internal projection (27), so as to be received between this projection and the top of the aluminium closure cap (4).

17. Closure device accoding to claim 14, characterized in that the peripheral flange (26) of the inner stopper (5) is frictionally embeddable in the aluminium closure cap (4).

Drawing