Container closure

Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to the field of container closures, and more particularly, to a closure for a liquids container which provides for selective release of the contents of such container.

[0002] It is well-known to provide closures for liquids containers, such as beverage cups, which provide for selective release of their contents.

[0003] One class of closure comprises a one piece construction, with a main cover member that can be secured to the outer periphery of a beverage cup in a conventional manner, and which has a cut-away flap portion that can be selectively displaced between a closed position, whereat the flap is positioned substantially in line with the main cover member, and an open position, whereat the flap projects away from the main cover member, thereby to provide an opening for flow of the liquid contents of the beverage cup. United States Patent No. 4,741, 450 (Braude), issued May 3,1988 and United States Patent No. 5,799, 814 (Schaefer et al.), issued September 1,1998 are both exemplary of this class, which is known to be capable of manufacture at relatively low cost, but can provide an unreliable liquid seal.

[0004] Another class of closure comprises two sections joined at their center.

[0005] The outer section can be secured to the outer periphery of a beverage cup in a conventional manner, and forms an annular well which has a plurality of openings therein. The inner section is stressed such that it normally bears against the openings, thereby to provide a liquid seal between said openings and any contents of the container. When the center of the outer section is depressed, the inner section separates from the openings, thereby to permit fluid contents of the container to flow through the openings.

[0006] United States Patent No. 3,797, 696 (Debrell), issued March 19,1974 ; United States Patent No. 3,727, 808 (Fitzergerald), issued April 17,1973 ; and United States Patent No. 3,730, 399 (Dibrell et al.), issued May 1,1973, are all exemplary of this latter class, which is known to be capable of providing a relatively liquid-tight seal, but suffers from the need for users to maintain pressure on the centre portion to permit fluid flow, which can be inconvenient.

[0007] United States Patent No. 5,597,096 (Jeppesen), issued January 28, 1997, from which the preamble of claim1 derives, discloses a condiment shaker including a vertically elongate base of generally conical configuration and defining an upwardly opening mouth, whereby a separate unitary seal releasably snap-mounts over the mouth and includes hinge-joined lower and upper walls having annular outer portions selectively moveable to expose dispensing openings in the lower wall, and selectively moveable to seal the dispensing openings in the lower wall.

SUMMARY OF THE INVENTION

[0008] The present invention comprises a closure for a container having an opening bounded by a rim. The closure comprises a substantially bowl-shaped body having an interior surface and an exterior surface and having defined therethrough an aperture. The closure further comprises a connection means for sealing the body to the container such that the interior surface defines an interior space into which the opening of the container opens during use of the closure. The body is selectively deformable, upon manual manipulation, between an open configuration, wherein the interior space is in fluid communication with the aperture, and a closed configuration, wherein the interior surface is sealed against the aperture.

[0009] Preferred embodiments of the invention are set forth in the dependent claims

[0010] Other advantages, features and characteristics of the present invention, as well as methods of operation and functions of the related elements of the structure, will become more apparent upon consideration of the following detailed description with reference to the accompanying figures, which are briefly described hereinbelow.

BRIEF DESCRIPTION OF THE FIGURES

[0011] 

FIGURE 1 is a side elevational view of a closure according to a first embodiment of the present invention, with a body portion shown in the closed configuration;

FIGURE 2 is a view similar to FIGURE 1, shown with the body in the open configuration;

FIGURE 3 is a plan view of the closure of FIGURE 1;

FIGURE 4 is a perspective cross-sectional view of the closure of FIGURE 1, viewed along line 4-4 of FIGURE 3;

FIGURE 5 is a perspective cross-sectional view of the closure of FIGURE 1, viewed along line 5-5 of FIGURE 3;

FIGURE 6 is a side cross-sectional view of the closure of FIGURE 1, Viewed along line 5-5 of FIGURE 3;

FIGURE 7 is a view similar to FIGURE 6, with the body in the open configuration;

FIGURE 8 is a side elevational view of a structure which can be used to form the closure of Figure 1;

FIGURE 9 is a view similar to FIGURE 8, showing the structure of FIGURE 8 formed into the closure of FIGURE 1;

FIGURE 10 is a view similar to FIGURE 7, showing the closure sealed to a container;

FIGURE 11 is a side elevational view of a closure according to a further embodiment of the invention, the closure being shown in the open position;

FIGURE 12 is a side elevational view of the closure of Figure 11 mounted on a cup, the closure being shown in the closed position;

FIGURE 13 is a front elevational view of the closure of Figure 11, the closure being shown in the closed position;

FIGURE 14 is a top view of another closure constructed according to the invention, this version having an outwardly projecting rim when mounted on a cup;

FIGURE 15 is a vertical cross-sectional view of the closure of Figure 14 mounted on a cup, this view being taken along the line 15-15 and the closure being shown in an intermediate open position;

FIGURE 16 is a side elevational view of the closure of Figure 14, the closing being shown in the fully raised position;

FIGURE 17 is a side elevational view of the closure of Figure 14, the closure being shown in the closed position;

FIGURE 18 is a side elevational view of a container such as a paint can fitted with still another form of closure according to the invention, the closure being shown in the closed position;

FIGURE 19 is a side elevational view of the closure of Figure 18, the closure being shown in an intermediate open position; and

FIGURE 20 is a side elevational view of the closure of Figure 18, the closure being shown in the fully raised position.

DETAILED DESCRIPTION

[0012] With reference to FIGURE 1, a preferred embodiment of the closure of the present invention is illustrated and designated with general reference numeral 20. As illustrated in FIGURE 10, the closure 20 is for a container 22 having an aperture or open top bounded by a rim 26, such as a disposable coffee cup. For clarity, it should be understood that the container 22 does not form part of the invention.

[0013] As indicated in FIGURE 1, the closure 20 comprises a substantially bowl-shaped body 28. Generally, the body 28 has an interior surface 30, best seen in FIGURE 4, and an exterior surface 32 and has defined therethrough a passage or aperture 34, as illustrated in FIGURE 2 and FIGURE 7. The closure 20 further comprises connection means for sealing the body 28 to the container 22 such that the interior surface 30 of the body 28, in combination with the container 22, defines an interior space 38 into which the aperture opens, as indicated in FIGURE 10. The connection means is designated with general reference numeral 36 in FIGURE 1, and comprises a skirt 60 which extends peripherally around and is operatively connected to the body 28, the skirt 60 having a peripherally extending groove 70 therein, as indicated in FIGURE 4, shaped and dimensioned to frictionally, sealingly, releasably receive the rim 26.

[0014] When so sealed to the container 22, the body 28 may be selectively deformed, by manual manipulation, between a closed configuration, as illustrated in FIGURE 1, wherein the interior surface 30 is sealed against the aperture 34 to resist fluid flow, and an open configuration, as illustrated in FIGURE 10, wherein the passage or aperture 34 is in fluid communication with the interior space, to permit fluid flow. Advantageously, a pair of vent holes 58 are formed in the body 28 (actually, in an annular sheath part44 of the body 28, described more fully in the following paragraph) on circumferentially opposite sides of the passage 34 to facilitate fluid egress, and avoid vacuum lock.

[0015] The structure of the body 28 will now be described in more detail with reference to FIGURES 6 and 7, and will be seen to comprise a cap part 62; the aforementioned sheath part 44; an insert part 50; and an intermediate part 56.

[0016] The sheath part 44, which has the passage 34 formed therein, has a first end 46 and a second end 48 and is frustoconical, tapering in external dimension towards the second end 48, which is occluded by and rigidly connected to the cap part 62. The insert part 50 also has a first end 52 and a second end54, the second end 54 being shaped and dimensioned to be received within the sheath part 44. The intermediate part 56 extends between the first end 46 of the sheath part 44 and the second end 54 of the insert part 50, and flexibly connects same for relative movement, upon manual manipulation, from the open position, seen best in FIGURE 7, where the insert part 50 and the intermediate part 56 are disposed exteriorly relative to the sheath part 44, to the closed configuration, where the second end 54 of the insert part 50 (in fact, the entire insert part 50) is disposed, in substantially form-fitting, nested relation, within the intermediate part 56, and the intermediate part 56 is disposed, in substantially form-fitting, nested relation, within the sheath part 44, as indicated in FIGURE 6. (It will be evident that during manual manipulation from the open configuration to the closed configuration, the intermediate part 56 collapses into the sheath part 44 and the second end 54 of the insert part 50 collapses into the intermediate part 56.)

[0017] As indicated above, the foregoing alone provides for selective release of any liquid contents of the container 22, but to further improve the seal, the interior surface 30 is formed with a protuberance 42 which projects through the passage 34 in a sealing manner when the body 28 is in the closed configuration, as indicated in FIGURE 1 and FIGURE 6. Additionally, the cap 62 forms an interiorly disposed protuberance having an outwardly tapering frustoconical sidewall 78 which, when the body 28 is in the closed configuration, sealingly engages against the junction of the intermediate part 56 and the insert part 50, so as to yet further increase the effectiveness of the seal.

[0018] In the preferred embodiment, the open configuration is a static open configuration wherein the body 28 is stable without an external application of force, and the closed configuration is a static closed configuration wherein the body 28 is stable without an external application of force; in fact, the body 28 is constructed of a resilient plastic and is of the "overcentre" variety, which is unstable at locations intermediate the open and closed position, and thus, self- biasing into one of the open and closed configuration, depending upon the relative locations of the various parts.

[0019] So as to facilitate manual manipulation of the so-biased body 28 from the closed position to the open position, a tubular pedestal part 74 is provided which rigidly extends between and connecting the first end 52 of the insert part 50 to the skirt 60, and the first end 52 of the insert part 50 is constructed of smaller external dimension than the first end 46 of the sheath part 44, thereby to define, in the closed configuration, an overhanging lip designated with general reference number 76 in FIGURE 6, which can be pried upwardly by the fingers of a user.

[0020] The closure 20 may be constructed from the structure 68 illustrated in FIGURE 8 wherein each of the sheath part 44; intermediate part 56; and insert part 50 take the form of a substantially frustoconical annulus connected to one another (preferably, formed integrally) in alternating orientation. With this structure, the intermediate part 56 is collapsed into the sheath part 44 and the insert part 50 collapsed into the intermediate part 56, and thereafter, the sheath part 44 is affixed, by sonic welding, adhesive or the like, to the insert part 50 at the side opposite to that in which the passage 34 is formed, so as to arrive at the preferred embodiment illustrated in FIGURE 9 (and FIGURE 1).

[0021] Figures 11 to 13 illustrate another embodiment of a closure suitable for use on a coffee cup, for example. This closure 82 is similar to the closure illustrated in Figures 8 and 9 of the drawings, except for the differences noted hereinafter. In Figure 12, the closure 82 is shown mounted on the annular rim of a coffee cup 84. The closure 82 has an annular connection means as well for sealing its body to the cup, this connection means including a skirt 60 which is integrally connected to the body 84 of the closure. As with the previous embodiments, the skirt forms an annular groove 70 which is shaped and dimensioned to frictionally and sealingly receive the rim of the cup.

[0022] A primary difference between the embodiment of Figures 11 to 13 and that of Figures 8 and 9 is the height of its tubular, pedestal part 88 which is substantially greater than the above described pedestal part 74. In a particular preferred embodiment of this version, the height of the pedestal part 88 is in the range of 1 cm to 2 cm and it is most preferably close to 1 cm. Because of the greater height of the pedestal part 88, it can be easier for the user of this closure to manipulate the closure from the closed position illustrated in Figure 12 to the open position. It will be seen that in the closed position shown in Figure 12, the closure has an overhanging lip 76 which is spaced a substantial distance above an upper rim 90 of the closure.

[0023] It will be understood that the closure 82 is also provided with an insert part 50 visible in Figure 11 and the upper end of this part is integrally connected to an outwardly sloping intermediate part 56. The passage 34 of this closure is also formed in the sheath part 44.

[0024] Turning now to another preferred embodiment of a closure constructed in accordance with the invention, this embodiment is illustrated in Figures 14 to 17. This closure is indicated generally at 92. Again, it will be understood that this embodiment is constructed generally in accordance with the embodiment of Figures 8 and 9 described above, except for the differences noted hereinafter. Figure 15 illustrates the closure 92 mounted on a cup 94 which can, for example, be a standard coffee cup. This closure is also fitted with means for connecting the body 96 of the closure to the cup, these means including the skirt 60 which extends peripherally around the bottom of the closure and which forms a groove to frictionally and sealingly receive the rim of the cup. The closure 92 includes an upper cap part 98, a downwardly sloping sheath part 100, an insert part 102 visible clearly in Figure 16, and an intermediate part 104. The sheath part 100 has a passage or hole 106 formed therein. Formed on the intermediate part 104 is a protuberance 108 which of course projects through the hole 106 when the body of the closure is in the closed position.

[0025] A significant distinction between the construction of this embodiment and that illustrated in Figures 1 to 9 is that this embodiment has an outwardly projecting, annular lip 110 which makes the closure easy to manipulate in order to move the closure from the fully closed position to the intermediate, open position of Figure 15. As clearly illustrated by Figures 15 and 17, the lip 110 projects beyond the skirt 60 a short distance making it relatively easy for the user's thumb or finger to push the projecting lip upwardly in order to move the closure to the open position.

[0026] Again, in this embodiment, it will be appreciated that in the closed position, the intermediate part 104 is collapsed into the sheath 100 and the insert part 102 is collapsed into the intermediate part 104.

[0027] It will be understood that in the embodiment of Figures 14 to 17 it is not necessary for the tubular pedestal part 110 to be as high as in the embodiment of Figures 11 and 12. In fact, this pedestal part 110 can be constructed with the same height as the embodiments of Figures 1 to 9.

[0028] Figure 16 illustrates the preferred angle of slope of the insert part 102. In particular, it has been found that in order for the closure to operate in a most desirable manner, the slope of the insert part 102 is approximately thirty degrees to the horizontal plane (assuming that the bottom of the closure is horizontal). Similarly, the preferred slope of the intermediate part 104 is also about thirty degrees to the horizontal either in the closed position or in the fully opened position illustrated in Figure 16.

[0029] Figures 18 to 20 illustrate yet another embodiment of a closure constructed in accordance with the invention, this embodiment being particularly suitable for use on a larger container such as paint can 152. The closure of this embodiment is designated generally by reference 154. The illustrated paint can can be per se of known construction except for the construction of the illustrated closure. In particular, the can can be equipped with a handle 154 as illustrated but it will be understood that the closure 154 is equally suitable for a paint can having no handle. Also, the can 152 is equipped with external connecting threads located at its top end 156. The threads themselves cannot be seen in Figure 18 as they are covered by the bottom portion of the closure 154. In any event, these threads are standard construction and they permit a threaded closure or top for the paint can to be detachably connected to the can in an efficient, sealable manner.

[0030] It will be understood that the closure 154, except for the differences noted hereinafter, can be constructed in a manner similar to the closure illustrated in Figures 8 and 9 and described above. A primary difference of the closure 154 is that it is fitted with an internally threaded skirt at 156 that forms the bottom portion of the closure. It will be understood that the internal threads (not shown) are dimensioned and arranged to cooperate smoothly with the external threads formed on the top portion of the paint can. A preferred optional feature of this closure is that it is fitted with a skirt extension 158. The skirt extension may be formed with a rippled or corrugated outwardly facing wall that permits it to be easily gripped for turning purposes. It will also be noted that the skirt extension extends radially beyond the annular lip 160 formed by the body 162 of the closure. In this way, the skirt extension is made easier to grip so that the closure can be readily turned about its vertical central axis.

[0031] Because the closure 154 is constructed for a larger container such as a paint can, it will be understood that it is made of a thicker, stronger plastic sheet material. Suitable plastics that can be used include polypropylene and polyethylene. It will be understood that the plastic sheet material must be selected so that it has sufficient strength and rigidity to properly contain the paint within the can for all normal conditions of use.

[0032] Additional features of the closure 154 that can be seen in the figures include a circular top or cap part 164, a downwardly sloping sheath part 166 and an intermediate part 168. A suitable hole 170 is formed in one side of the sheath part. In the closed position shown in Figure 18, this hole can be sealed shut by means of a protuberance 172, this protuberance being formed on the intermediate part 168. Air holes 174 can be formed on opposite sides of the sheath part 166, if desired or necessary. If desired, protuberances can be provided on the intermediate part 168 to close sealingly the air holes 174 in the closed configuration.

[0033] Figure 19 illustrates the closure 154 in an intermediate open position which allows paint (or any other liquid in the container) to flow out through the hole 170. In this position, the closure has been pried upwardly on one side only, that is on the side of the hole 170. However, if desired, the upper portion of the closure can be fully raised to the position illustrated in Figure 20. Movement of the closure to this position may be desirable, for example, for cleaning the lid. Particularly for a paint can lid, it can be important to clean off the interior of the lid so that it will function properly for future use purposes. With the closure in the position shown in Figure 20, it is relatively easy to remove all of the material such as paint from the interior of the closure. Once the cleaning operation has been completed, the lid can be restored to the closed position shown in Figure 18.

[0034] Finally, it is to be understood that while several preferred embodiments of the present invention are herein shown and described, various changes in size and shape of parts can be made. For example, whereas the connection means for sealing the body to the container in the preferred embodiment comprise a groove to receive the rim of the container, it will be evident that the body and the container may, for example, be formed integrally, in which case the connection means will constitute a physical connection between the body and the container, and the rim will be a notional structure. As well, it will be readily understood that the invention is not limited to beverage containers and paint cans, but may be utilized with equal utility in combination with other larger containers. Similarly, whereas the closure of the preferred embodiment is annular, and relatively "affixed" at one side the body may take other shapes, for example, rectangular, akin to an accordion, or polygonal, and may "open" from all sides. Also, whereas the structure illustrated in the preferred embodiment contemplates its construction from a precursor structure, it will be evident that such precursor structure is not necessary. Yet further, whereas in the preferred embodiment, sealing of the passage is effected by the interior surface, it is possible to seal the passage by the exterior surface, for example, by provision of an externally-projecting protuberance on the insert part, and by locating the passage through the intermediate part of the body.

Claims

1. A closure (20) for a container having an opening bounded by a rim (26), said closure comprising:

a substantially bowl-shaped body (28) having an interior surface (30) and an exterior surface (32) and having defined therethrough an aperture (34) ; and

connection means (36) for sealing the body to the container such that the interior surface defines an interior space (38) into which the opening of said container opens during use of said closure,

said body being selectively deformable, upon manual manipulation, between an open configuration, wherein the interior space is in fluid communication with the aperture, and a closed configuration, characterised in that in the closed configuration the interior surface is sealed against the aperture.

2. A closure according to claim 1, wherein the open configuration is a static open configuration wherein the body is stable without an external application of force.

3. A closure according to claim 2, wherein the closed configuration is a static closed configuration wherein the body is stable without an external application of force.

4. A closure according to claim 1, wherein the interior surface (30) defines a protuberance (42) which projects through the aperture (34) when the body is in the closed configuration.

5. A closure according to any one of claims 1 to 4, wherein said connection means (36) comprises a skirt (60) which extends peripherally around and is operatively connected to the body, the skirt having a peripherally extending groove (70) therein shaped and dimensioned to frictionally, sealingly, and releasably receive said rim (26).

Ansprüche

1. Verschluss (20) für einen Behälter mit einer Öffnung, die durch einen Kragen (26) begrenzt ist, wobei der Verschluss folgendes umfasst:

einen im Wesentlichen tellerförmigen Körper (28) mit einer Innenfläche (30) und einer Außenfläche (32) und mit einem durch diese hindurch definierten Durchlass (34) und

ein Verbindungsmittel (36) zum dichten Verschließen des Körpers am Behälter, so dass die Innenfläche einen Innenraum (38) definiert, in welchem sich die Öffnung des Behälters während des Gebrauchs des Verschlusses öffnet,

wobei der Körper nach manueller Manipulation zwischen einer offenen Konfiguration, wobei der Innenraum in Flüssigkeitsübertragung zur Öffnung steht, und einer geschlossenen Konfiguration, dadurch gekennzeichnet, dass in der geschlossenen Konfiguration die Innenfläche gegen die Öffnung verschlossen ist, selektiv verformbar ist.

2. Verschluss nach Anspruch 1, wobei die offene Konfiguration eine statisch offene Konfiguration ist, in welcher der Körper ohne äußere Anwendung von Kraft stabil ist.

3. Verschluss nach Anspruch 2, wobei die geschlossene Konfiguration eine statisch geschlossene Konfiguration ist, in welcher der Körper ohne äußere Anwendung von Kraft stabil ist.

4. Verschluss nach Anspruch 1, wobei die Innenfläche (30) einen Überhang (42) definiert, welcher durch die Öffnung (34) hervorsteht, wenn sich der Körper in der geschlossenen Konfiguration befindet.

5. Verschluss nach einem der Ansprüche 1 bis 4, wobei das Verbindungsmittel (36) eine Randleiste (60) umfasst, die sich peripher um den Körper erstreckt und an demselben wirkend verbunden ist, wobei die Randleiste eine sich peripher darin erstreckende Rille (70) aufweist, die derart geformt und bemessen ist, um den Kragen (26) reibend, verschließend und lösbar aufzunehmen.

Revendications

1. Une fermeture (20) pour un récipient ayant une ouverture limitée par un rebord (26), ladite fermeture comprenant :

un corps (28) essentiellement en forme d'assiette ayant une surface intérieure (30) et une surface extérieure (32) et au travers de celles-ci une ouverture définie (34) ; et

un moyen de raccordement (36) pour fermer de façon étanche le corps sur le récipient de sorte que la surface intérieure définit un espace intérieur (38) dans lequel l'ouverture dudit récipient s'ouvre pendant l'utilisation de ladite fermeture,

ledit corps étant déformable sélectivement par manipulation manuelle entre une configuration ouverte, dans laquelle l'espace intérieur met le fluide en communication avec l'ouverture, et une configuration fermée caractérisé en ce que dans la configuration fermée la surface intérieure est fermée de façon étanche contre l'ouverture.

2. Une fermeture selon la revendication 1 dans laquelle la configuration ouverte est une configuration ouverte statique dans laquelle le corps est stable sans qu'une force extérieure ne soit appliquée.

3. Une fermeture selon la revendication 2 dans laquelle la configuration fermée est une configuration fermée statique dans laquelle le corps est stable sans qu'une force extérieure ne soit appliquée.

4. Une fermeture selon la revendication 1 dans laquelle la surface intérieure (30) définit une protubérance (42) débordant de l'ouverture (34) lorsque le corps est en configuration fermée.

5. Une fermeture selon l'une des revendications 1 à 4 dans laquelle ledit moyen de raccordement (36) comprend un bord (60) qui s'étend en périphérie et est raccordé en relation active au corps, le bord ayant une rainure (70) s'étendant en périphérie qui est formée et dimensionnée pour recevoir ledit rebord (26) par friction, de manière fermable de façon étanche et de manière séparable.

Drawing