AU2002308179B2

AU2002308179B2 - Dispenser closure for a container that contains a flowable product

Info

Publication number: AU2002308179B2
Application number: AU2002308179A
Authority: AU
Inventors: Gerhard F K Jackel; Franz Lenz; Eldon Schaffer
Original assignee: Seaquist Loeffler Kunststoffwerk GmbH
Current assignee: Aptar Freyung GmbH
Priority date: 2001-09-20
Filing date: 2002-03-20
Publication date: 2007-02-01
Anticipated expiration: 2022-03-20
Also published as: BR0212900A; CN1575249A; RU2004111799A; PL199555B1; EP1427646A1; DE20115488U1; JP4230354B2; RU2288150C2; CA2460786C; PL367505A1; MXPA04002671A; CN100333976C; CA2460786A1; WO2003026981A1; EP1427646B1; CZ2004387A3; ES2248637T3; US20040238540A1; JP2005503302A; DE50204418D1

Description

C Dispenser closure for a container that contains a c-i flowable product CA 5 The invention relates to a dispensing closure for containers which contain free-flowing substances, in particular for drinks containers.

OO Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms Spart of common general knowledge in the field.

c-i Numerous designs of dispensing closures of this type are known from the prior art, and the closures are used for drinks containers made from various materials, in particular from glass and plastic.

In particular in recent years, increased demands have been imposed on drinks containers of this type and associated dispensing closures for various intended uses and applications, in which context on the one hand reliable sealing of the dispensing closure even under high levels of loads, as occur for example when the drinks containers are carried along during sporting activity, causes problems, and on the other hand it is desirable for the user of the containers to have as pleasant an experience as possible during removal of the substances, in particular when drinking, when the user's mouth generally comes into direct contact with the dispensing closure.

It is an object of the present invention to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative.

2 O It is an object of the present invention in its preferred form to provide an improved dispensing closure for containers which contain free-flowing substances, in particular for the abovementioned drinks c- 5 containers, which on the one hand ensures an improved sealing of the dispensing closure and on the other hand allows a pleasant sensation to be felt in the event of direct contact with the dispensing closure.

OO

Unless the context clearly requires otherwise, A throughout the description and the claims, the words 'comprise', 'comprising', and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".

According to a first aspect of the invention, there is provided a dispensing closure made from plastic for containers which contain free-flowing substances, in particular for drinks containers, the dispensing closure comprising: a closure body having a cover, from the outer edge of which projects a casing which can be secured to the container over an opening in the latter, a substantially horizontal annular shoulder of the cover, from the radially inner region, with respect to the longitudinal center axis, of which a dome-like elevation extends outward, with an outlet opening, which is in communication with the opening in the container, at its outer end, a sleeve element, which at least partially covers an outer region of the dome-like elevation and the material of which is softer than the material of the dome-like elevation, and a closure element for the outlet opening, wherein the dome-like elevation forms a drinking stub, the outlet opening of which has a termination edge which is bent off radially inward and in its top region runs virtually horizontally, the dimensions 3 C of the sleeve element made from thermoplastic c'q polyester and of the drinking stub, and also of a cylindrical pinch member provided on the inner side of a head plate of the closure element, being cl 5 matched to one another in such a way that, in the closed position of the closure element, the pinch member engages over the drinking stub with the sleeve element arranged thereon virtually without OO any noise.

According to another aspect of the invention, there is Sprovided a dispensing closure for containers which c-I contain free-flowing substances, in particular for drinks containers, the dispensing closure comprising: a closure body having a cover, from the outer edge of which projects a casing which can be secured to the container over an opening in the container, an outlet opening in a top side of the closure body, which is in communication with the opening in the container, and a closure element for opening and closing the outlet opening of the closure body, a dome-like elevation of the closure body, which is arranged around the outlet opening in the closure body, which is provided with a sleeve element which at least partially covers an outer region of the dome-like elevation, the material of the sleeve element being softer than the material of the dome-like elevation and/or of the cover and/or of the material of the closure body.

Preferably, this dispensing closure of the invention has a very positive influence on the contact sensation of the user who, for example during drinking, comes into contact substantially or exclusively with the sleeve element, which consists of the softer material.

Furthermore, the sealing of the dispensing closure is improved by the softer material used for the sleeve element, since the closure element which closes off the outlet opening preferably seals off the outlet opening by direct contact with the sleeve element. Furthermore, 3a Sthe fact that the softer material is highly compressible means that it is possible to select the D dimensions of the components in such a way that while a reliable seal is obtained, it is not necessary to Cl 5 impose excessively high demands on the accuracy of the manufacturing tolerances. If necessary, it is additionally possible to provide a t-amperproofing means in the form of a closure for the outlet opening of the OO closure body. In this way, in order to maintain the quality of the contents of the pouch, any possibility A of air or oxygen reaching the interior of the container Sis ruled out until the container is opened for the first time. This tamperproofing means may consist of the same material as the sleeve element and/or of the material of the closure body. In addition to in this way achieving a high level of quality assurance for the contents of the container, it is thereby possible to significantly simplify and reduce the costs of mass production of the dispensing closure. Therefore, the invention is based on the surprising discovery that the provision of the sleeve element consisting of softer material makes it possible to achieve or solve both the abovementioned objects or problems.

A further advantage of the preferred dispensing closure having the sleeve element consisting of soft material is the noise insulation, since there is no disruptive noise produced when a lid, in particular a hinged lid, is opened and closed. This is advantageous in particular if, for example, a corresponding container is to be opened as unobtrusively as possible in a quiet atmosphere, for example in a library or during a lecture.

Suitable preferred materials for the sleeve element are in particular thermoplastic polymers, in particular thermoplastic polyester (TPE), high-pressure polymers (low-density polyethylene, LDPE), but also other soft 3b O plastics, rubber and/or silicone. These materials can be set to the desired softness of the sleeve element Sbut are also stable enough to ensure a long service life of the sleeve element and therefore of the I 5 dispensing closure.

Of course, it is possible for the sleeve element to be made from a combination of two or more of the 00 abovementioned materials without departing from the subject matter of the present invention.

It is preferable for the closure body to be formed integrally with a dome-like elevation which projects 4 above the top side or edge of the closure body and can be used as a drinking stub for the user. Furthermore, it is preferable for the diameter of the dome-like elevation to be stepped over its height, the dome-like elevation preferably having a smaller diameter toward its outer region and having the opening at its outer end.

In one preferred embodiment, the sleeve element is designed in such a way that the dome-like elevation, in its outer region, is covered by the sleeve element substantially completely, i.e. if appropriate including the opening and/or its tamperproof closure made from the material of the closure body. This ensures that the entire area which can come into contact with the mouth of a person who is drinking is covered by the sleeve element, so that the pleasant contact sensation is fully retained. Furthermore, this allows the configuration of the closure element to be made more variable, because a mating element, provided for sealing purposes, of the closure element can engage at various locations of the sleeve element and thereby ensure a seal. For example, if the tamperproof element is designed as a tear-off tab which seals the opening, the user, for example a cyclist, can tear off the tear-off tab using his teeth, without having to use one of his hands, while cycling in order to open the container.

However, the sleeve element may extend only over certain partial regions of the dome-like elevation, in particular over an upper region of the dome-like elevation. This configuration, in particular the size of the dome-like elevation, can be appropriately adapted to the desired use by a person skilled in the art.

By contrast, the sleeve element may extend not only over the dome-like elevation and, if desired, over its 5 opening, but rather may also cover further partial regions of the closure body.

In a preferred embodiment, the closure element is a hinged lid which is articulatedly mounted integrally on the closure body by means of a hinge. Therefore, the closure element and the closure body form a single unit which is injection-molded integrally from plastics material and in which the closure element is not lost after it has been fitted to the container.

Of course, it is also possible for separate closure elements to be provided instead of a closure element which is connected to the hinged lid. Furthermore, without departing from the scope of the invention, it is conceivable to use all possible closure options, e.g. a closure element which is secured to the closure body by a snap-action mechanism or a screw thread.

The invention is described in more detail below with reference to a diagrammatic drawing of exemplary embodiments of a dispensing closure. In the drawing: fig. 1 shows an opened dispensing closure in the form of a center longitudinal section; fig. 2 shows a second embodiment of a dispensing closure in the form of a center longitudinal section as in fig. 1; fig. 3 shows a third embodiment of a dispensing closure in the same form of illustration as in figs. 1 and 2; fig. 4 shows a fourth embodiment of a dispensing closure in the same form of illustration as in figs. 1 3; and 6 fig. 5 shows a three-dimensional illustration of the dispensing closure from fig. 4.

Fig. 1 shows a dispensing closure 10 for containers which contain free-flowing substances, having a closure body 100 and a closure element 200 designed as a lid.

The closure body 100 and the closure element 200 are connected to one another on one side by means of a hinge 290, which is designed as an integral hinge, so that the closure element 200 can be pivoted through 1800, about an axis formed by the integral hinge 290, from the position in which it opens up the closure body as shown in fig. 1 into the position in which it closes the closure body.

On its top side, the closure body 100 has a cover 120, from the radially outer edge of which a casing 110 extends laterally. The casing 110 is of substantially cylindrical design and has an internal screw thread 112, by means of which it can be screwed onto a container (not shown) having a corresponding mating screw thread and can thereby be secured in place.

As an alternative to the screw connection, it is also possible to provide other ways of securing the closure body on a container, e.g. snap-action connections. It is also possible for the dispensing closure to be formed directly integrally with a corresponding container.

In the embodiment shown in fig. 1, in the upper region of the casing 110 of the closure body 100, in the vicinity of the outer edge of the cover 120 of the closure body 100, there is a sealing lip 114 which is designed in the form of a ring which slopes downward slightly with respect to the horizontal, so that this sealing lip 114, when the closure element 100 is being screwed onto the container, presses onto and seals a top side of the container opening.

7 In the embodiment shown here, the sealing lip 114 is formed integrally with the closure body but consists of a soft material, in this case silicone, unlike the hard plastic from which the closure body 100 and also the closure element 200 of the dispensing closure 10 are made. However, at this point it should be noted that in another embodiment the sealing lip 114 may be made from the same material as the closure body 100, which simplifies the production process.

The cover of the closure body 100 has a substantially horizontal annular shoulder 122, from which a radially inner region, with respect to the longitudinal center axis, extends outward beyond the annular shoulder in the style of a dome and in stepped form, the diameter of the dome-like elevation 124 being stepped over its height, and the dome-like elevation 124 having an outlet opening 126 at its outer end.

The dome-like elevation substantially comprises a first (or upper) step 128, which, with respect to the cover 120, lies above a second (or lower) step 134. Each of the steps 128, 134 is substantially cylindrical in form, with the two steps 128, 134 having similar heights, but the first step 128 having a smaller diameter. The transitions between the first step 128 and the second step 134 and between the second step 134 and the annular shoulder 122 on the outer side are rounded, so that there are no sharp edges. Above the first step 128 there is a termination rim 136 of the outlet opening 126 which is bent off radially inward and in its top region runs virtually horizontally.

The inner region of the dome-like elevation 124 of the cover 120 is also stepped: beneath the smallest internal diameter of the outlet opening 126 within the dome-like elevation, the internal diameter of the domelike elevation widens out in the downward or inward 8 direction. After a first widening of the internal diameter directly beneath the termination rim 136, the inner region extends substantially cylindrically over the entire axial extent (in the direction of the height) of the first step and widens out further approximately at the height of the transition region between the first step 128 and the second step 134.

The lower end of the first step 128 of the flexible tube holder 180, in the inner region, forms an annular stop face 130, which at the same time delimits an annular groove 132 in the upper region within the second step 134. The inner region of the second step 134 below the annular groove 132 has a frustoconical profile and widens out downward, merging at its bottom end into the lower side of the horizontally positioned annular shoulder 122 of the cover 120.

The closure element 200 is substantially designed in the form of a lid and comprises a head plate 210 and a side region 220 which extends from the head plate, the side region 220 substantially being designed in such a way that, in a closed position of the closure element 200, it is substantially flush with the casing 110 of the closure body 100.

Furthermore, on its opposite side from the hinge 290, the closure element 200 has a groove 260 for receiving a quality assurance element 160, the groove 260 (in the lower region in the position of the closure element 200 shown in Figure 1, and therefore in the upper region in the closed position) being recessed inward, so that the quality assurance element 160 can be pressed into this recessed region in order to break the seal. The groove 260 for the quality assurance element 160 is delimited by a lug 262 and a protuberance 264 in its upper and lower regions.

9 The embodiment shown in fig. 1 has a sleeve element 150 which consists of thermoplastic polyester (TPE), extends substantially over the entire outer region of the dome-like elevation 124 of the cover 120 and follows the contour of the dome-like elevation 124.

The dimensions of the sleeve element 150 made from thermoplastic polyester and of the dome-like elevation 124 and a pinch member 280, which is provided on the inner side of the head plate 210 of the closure element 200 and is substantially circular in design, are matched to one another in such a way that, when the closure element 200 is closed virtually without any noise, the pinch member 280 engages over the first step 128 of the dome-like elevation 124 with the sleeve element 150 arranged thereon, and in this way closes off the outlet opening 126 in a sealed manner with respect to the outside.

In the embodiment shown in fig. 1, the external diameter of the sleeve element 150, at the height of the first step 128, in its uncompressed state is slightly larger than the internal diameter of the circular pinch member 280 of the closure element 200, so that as a result of the closure element 200, which is designed as a hinged lid, being closed, with the sleeve element 150 being slightly compressed at the same time, a press fit is produced between the pinch member 280 and sleeve element 150, which leads to reliable sealing at this location, even if minor manufacturing tolerances in the geometry and/or dimensions of the individual elements are present, which is inevitable at least to a small extent, in particular in the case of mass production or else relatively expensive production processes will be required in order to comply with more accurate tolerance requirements.

10 Purely for the sake of completeness, it should be noted that the embodiment of the dispensing closure shown in fig. 1 is designed in such a way that it is additionally also possible for a flexible dispensing tube to be inserted into the inner region of the closure body 200, which flexible dispensing tube is fixed securely in the inner region of the dome-like elevation 124, with its outer end projecting out of the outlet opening 126, in order if necessary to make it even easier for the free-flowing substances to be removed.

Fig. 2 shows a further embodiment of a dispensing closure, which is substantially identical to the embodiment shown in fig. 1.

Unlike in the embodiment shown in fig. 1, however, the sleeve element 150 is designed in such a way that it covers only an upper region of the dome-like elevation 124, namely the first step 128 and the transition between the first step 128 and the second step 134 of the dome-like elevation 124. Furthermore, in this embodiment the sleeve element 150 is made from a low-density polyethylene (LDPE).

In the embodiment shown in fig. 3, a dispensing closure is designed substantially in the same way as in the embodiment shown in fig. 1. However, the outlet opening 126 in the top side of the closure body 100 is provided with a tamperproof closure 300. This tamperproof closure 300 forms an integral part of the dispensing closure 10 and for this purpose is made from the relatively soft material of the sleeve element 150. A weakened line 302, which follows the edge of the outlet opening 126 in the dome-like elevation 124, connects the tamperproof closure 300 which seals off the outlet opening 126 to the sleeve element 150. It is advantageous for a tear-off tab 304 to be connected to the tamperproof closure 300 and preferably to be formed 11 integrally therewith. The tear-off tab 304 makes it easy to open the container by tearing off the tear-off tab 304 even if this cannot be done by hand, as is the case, for example, in cycling races or the like.

The tamperproof element 300 therefore ensures that air or oxygen cannot adversely affect the quality of the contents of the container until the container or bottle is opened for the first time. In this case too, the sleeve element 150 together with the tamperproof closure 300 may consist of thermoplastic polyester (TPE) and/or of low-density polyethylene (LDPE), or of rubber, silicone and/or a soft plastic or a combination of these materials.

The embodiment of a dispensing closure 10 shown in fig. 4 differs from that shown in fig. 3 only through the fact that a tamperproof closure 400 is made from the material of the closure body 100 and is produced together with the latter as an integral workpiece using the plastics injection-molding process. This tamperproof closure 400 is exposed at the top or outside and is connected or produced integrally with the closure body 100 by a weakened 'line 402 which follows the annular edge of the outlet opening 126. A tear-off tab 404, which as in fig. 3 projects obliquely from the top side of the tamperproof closure 400, consists of the same material as the closure body 100 and is intended to facilitate opening of the container provided with the dispensing closure 10 but to ensure that the quality of the contents of the container is preserved until it is opened by hermetically sealing the outlet opening 126 of the container. The closure body 100 is produced integrally with the tear-off tab 404, preferably from polypropylene (PP) or polyethylene (PE) using the injection-molding process.

Of course, if necessary it is also possible for the tamperproofing means 400, which consists of the 12 material of the closure body 100, and its tear-off tab 404 additionally to be covered with the soft material of the sleeve element 150, in particular if a container equipped therewith is to be used for a purpose in which the container cannot be opened by hand or can only be opened by hand with difficulty, as is the case in certain forms of sport, such as for example cycling etc.

Fig. 5 gives a general impression of the described dispensing closure from figs. 3 and 4, with the dispensing closures shown in figs. 1 and 2 also being comparable to the illustration of the dispensing closure provided in fig. 5 if one imagines that the tamperproof closure 400 and the tear-off tab 404 are absent, and instead there is an open outlet opening 126 of the closure body 100.

13 S102-06 PCT List of reference numerals Dispensing closure 100 Closure body 110 Casing 112 Screw thread 114 Sealing lip 120 Cover 122 Annular shoulder 124 Dome-like elevation 126 Outlet opening 128 First step 130 Annular stop face 132 Annular groove 134 Second step 136 Termination rim 150 Sleeve element 160 Tamperproof element 200 Closure element 210 Head plate 220 Side region 260 Groove 262 Lug 264 Protuberance 280 Pinch member 290 Hinge 300 Tamperproof closure 302 Weakened line 304 Tear-off tab 400 Tamperproof closure 402 Weakened line 404 Tear-off tab

Claims

1. A dispensing closure made from plastic for containers which contain free-flowing substances, (1 5 in particular for drinks containers, the dispensing closure comprising: a closure body having a cover, from the outer edge of which projects a casing which can be secured to OO the container over an opening in the latter, 10 a substantially horizontal annular shoulder of the cover, from the radially inner region, with Srespect to the longitudinal center axis, of which a dome-like elevation extends outward, with an outlet opening, which is in communication with the opening in the container, at its outer end, a sleeve element, which at least partially covers an outer region of the dome-like elevation and the material of which is softer than the material of the dome-like elevation, and a closure element for the outlet opening, wherein the dome-like elevation forms a drinking stub, the outlet opening of which has a termination edge which is bent off radially inward and in its top region runs virtually horizontally, the dimensions of the sleeve element made from thermoplastic polyester and of the drinking stub, and also of a cylindrical pinch member provided on the inner side of a head plate of the closure element, being matched to one another in such a way that, in the closed position of the closure element, the pinch member engages over the drinking stub with the sleeve element arranged thereon virtually without any noise.

2. The dispensing closure as claimed in claim 1, wherein the diameter of the drinking stub is stepped over its height. 15 S3. The dispensing closure as claimed in one of the c' preceding claims, wherein a first, upper step of the drinking stub, with respect to the cover, is arranged above a second, lower step. c-i

4. The dispensing closure as claimed in one of the preceding claims, wherein each of the steps of the drinking stub is of substantially cylindrical OO design. The dispensing closure as claimed in one of the Spreceding claims, wherein the two steps of the drinking stub have similar heights, but the first step has a smaller diameter.

6. The dispensing closure as claimed in one of the preceding claims, wherein the outer-side transitions between the first step and the second step of the drinking stub and between the second step of the drinking stub and the annular shoulder are rounded.

7. The dispensing closure as claimed in claim 1, wherein the sleeve element covers only the first step and the transition between the first step and the second step of the drinking stub.

8. The dispensing closure as claimed in claim 1, wherein the sleeve element extends substantially over the entire outer region of the drinking stub and follows the contour of the latter.

9. The dispensing closure as claimed in claim 1, wherein the inner region of the drinking stub is likewise stepped, with the internal diameter of the drinking stub increasing in the inward direction below the smallest internal diameter of the outlet opening. 16

10. The dispensing closure as claimed in claim 9, to wherein the inner region of the drinking stub, after the first widening of its internal diameter S 5 below the termination edge of the outlet opening, extends substantially cylindrically over the entire axial extent of the first step and widens out approximately at the height of the transition OO region between the first step and the second step. 00 I C 11. The dispensing closure as claimed in one of the C preceding claims, wherein the inner region of the second step is frustoconical below the annular groove and widens out in the downward direction, before merging at its lower end into the horizontal annular shoulder of the cover.

12. The dispensing closure as claimed in one of the preceding claims, wherein the lower end of the first step of a flexible tube holder, in the inner region of the drinking stub, forms an annular stop face, which at the same time delimits an annular groove in the upper region of the second step.

13. The dispensing closure as claimed in one of the preceding claims, wherein a flexible dispensing tube can be inserted into the inner region of the closure body, which flexible dispensing tube is securely fixed in the inner region of the drinking stub, with its outer end projecting out of the outlet opening to facilitate removal of the free- flowing substances.

14. The dispensing closure as claimed in claim 1, wherein the closure body is designed substantially in the form of a lid and comprises a head plate and a side region which extends from the head plate and, in a closed position of the closure 17 O element, is substantially flush with the casing of the closure body. (Ni3 The dispensing closure as claimed in claim 14, C 5 wherein a hinged lid, as the closure element for opening and closing the outlet opening of the closure body, is articulatedly mounted integrally and pivotably on the closure body by means of an 00 integral hinge. C 16. The dispensing closure as claimed in claim wherein the closure element, on its opposite side from the hinge, has a groove for receiving a quality assurance element, the groove, in the closed position of the closure element, being recessed inward in the upper region, so that the quality assurance element can be pressed into this recessed region in order to break the seal.

17. The dispensing closure as claimed in claim 16, wherein the groove for the quality assurance element is delimited by a lug and a protuberance in its upper and lower regions.

18. A dispensing closure made from plastic for containers which contain free-flowing substances, in particular for drinks containers substantially as herein described with reference to any one of the embodiments of the invention illustrated in the accompanying drawings and/or examples. DATED this 22 nd day of August, 2005 Shelston IP Attorneys for: Seaquist-Loffler Kunststoffwerk GmbH