Patent Publication Number: US-2007095864-A1

Title: Dispensing closure for containers

Description:
TECHNICAL FIELD  
      The present invention relates to a closure suitable for dispensing pourable product from a container. More specifically, the present invention is directed to a “flip-top” type closure operated by an actuating means.  
     BACKGROUND OF THE INVENTION  
      Dispensing closures for containers are commonly known in the art and may be based on various opening mechanisms such as “push and turn”, “twist and turn”, “twist to open” or “push and pull”. Those closures are commonly used in combination with containers designed to contain products such as food, beverages, personal care products, pharmaceutical or cosmetic products. Typical types of dispensing closures are for example described in EP-B1-0378488 (turn open), U.S. Pat. No. 5,305,932 (snap-on), U.S. Pat. No. 2,004,015507 (push and pull) or WO 03/050033 (twist to open). The specific type of flip-top closures is described for example in WO 2004/110889, EP-A1-0 567 374, EP-A1-0 379 775, U.S. Pat. No. 5,551,607 or U.S. Pat. No. 5,762,216.  
      Although the above-types of closures will generally function satisfactorily in the applications for which they are designed, they typically only permit slow dispensing of limited amount of fluids. However, in certain circumstances, it is required to dispense the contained products much faster and in a relatively large quantity. This is typically the case in the context of liquid detergent containers. It has indeed been discovered that the users of containers equipped with the corresponding dispensing closures primarily seek for the fastest possible delivery of the contained liquid detergent into an appliance or receptacle. Most commonly used closures for containers adapted for delivering liquid detergent compositions, which are typically viscous liquids by nature, are described e.g. in EP-B1-0 109 704. Those dispensing closures typically consist of two separate parts: a spouted transition piece and a screw-type cap. Although the spouted piece allows for precise pouring of the viscous liquid into the intended receptacle, the cap is however often seen as difficult and/or too long to open and may easily get lost.  
      Another drawback associated with the use of the above dispensing system is that under usage, liquid detergent compositions may be spilled in the area where liquid detergent is consumed and/or on the user&#39;s hands which may lead to skin irritation or even burns. This often occurs when the above-mentioned cap is also used as a dosing means.  
      It is therefore an objective of the present invention to provide a dispensing closure suitable for dispensing pourable product from a container which provides fast dispensing of the contained product, which is easy-to-use, mess-free and which overcomes the above-mentioned drawbacks.  
      It has now been found that the above objective can be met by providing a dispensing closure  1  according to the present invention.  
      Advantageously, the dispensing closure  1  according to the present invention exhibits improved opening/closing ergonomics. It is therefore possible, in a preferred embodiment of the invention, to operate the dispensing closure  1  using a single finger of the hand used to hold the container  2  to which the dispensing closure  1  is attached.  
      A further advantage associated with the dispensing closure  1  according to the present invention is that due to the relatively large pouring opening, the container  2  in combination to which the dispensing closure is used, is easily refillable.  
      It is still another advantage that the dispensing closure  1  of the present invention requires a minimum number of components, which greatly facilitates its manufacture and assembly, and substantially reduces the associated production costs.  
      Other advantages and more specific properties of the dispensing closure  1  according to the present invention will be clear after reading the following description of the invention in combination with the attached drawings.  
     SUMMARY OF THE INVENTION  
      The present invention relates to a dispensing closure  1  suitable for being mounted on a container  2 , the container  2  having a dispensing opening  3  and being suitable for containing a pourable product in its interior volume, wherein the dispensing closure  1  comprises: 
          (a) a base member  6  comprising a means for attachment  9  to the container  2 , a draining canal  11  adapted to communicate with the interior volume of the container  2 , and a discharging means  12 ;     (b) a cap  16  comprising a sealing means  17  for securing said cap  16  onto said base member  6  thereby covering said discharging means  12  in a tight manner vis-à-vis the content of said container  2 ;     (c) a means of articulation  26  of the cap  16  with respect to the base member  6  between a open position whereby the discharging means  12  is uncovered and a closed position whereby the discharging means  12  is covered by said cap  16 ; the means of articulation  26  joining the cap  16  to the base member  6 ;     (d) a flexible member  30  lodged within the base member  6  and comprising a locking means  34  adapted to inter-engage the sealing means  17  so as to maintain the cap  16  in its closed position; the flexible member  30  further comprising an actuating means  35  which under actuation is capable of disengaging the locking means  34  from the sealing means  17 ;     (e) complementary means  40 , 41  located in the cap  16  and in the flexible member  30  capable of releasing the cap  16  back towards its open position once the locking means  34  have been disengaged from the sealing means  17 .        

      In another embodiment, the present invention is directed to a container closure assembly, comprising: 
          (a) a container  2  having a body portion  4  for holding the container content, a lower closed end for supporting the container  2 , an upper end including a means of attachment  10  thereon adapted to receive and affix a dispensing closure for containers;     (b) a dispensing closure  1  as above-indicated, mounted on the container  2 .        

      The present invention further encompasses a method of dispensing the content of a container  2  comprising the steps of: 
          (a) providing a container closure assembly as above-described, wherein the cap  16  is in its closed position;     (b) actuating the actuating means  35  so as to release the cap  16  back towards its open position;     (c) pouring the required amount of the container content through the discharging means  12 ;     (d) mechanically closing the cap  16  back towards its closed position.       

    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a cross-section view of a container closure assembly according to the present invention. The assembly comprising a container  2  onto which is mounted a dispensing closure  1  according to another embodiment of the invention.  
       FIG. 2  is a top perspective view of a dispensing closure  1  according to the invention in its closed position.  
       FIG. 3  is a top perspective view of a dispensing closure  1  according to the invention in its open position.  
       FIG. 4  is an exploded perspective view of a dispensing closure  1  according to the invention in its open position, which shows the base member  6 , the cap  16  and the flexible member  30  separately.  
       FIG. 5  is a top perspective view of a dispensing closure  1  according to another embodiment of the present invention in its open position.  
       FIG. 6  is a bottom view of a dispensing closure  1  according to the invention in its open position.  
       FIG. 7  is a top perspective view of a dispensing closure  1  according to the invention from which the base member  6  has been removed and which represents the flexible member  30  and the cap  16  in its closed position.  
       FIG. 8  is a top view of a dispensing closure  1  according to the invention in its open position.  
       FIG. 9  is a bottom perspective view of a dispensing closure  1  according to the invention in its closed position.  
       FIG. 10  is a bottom perspective view of a dispensing closure  1  according to the invention from which the base member  6  has been removed and which represents the flexible member  30  and the cap  16  in its closed position.  
       FIG. 11  is a bottom view of  FIG. 7 . 
    
    
     DETAILED DESCRIPTION OF THE INVENTION  
      For the purposes of promoting and understanding the principles of the present invention, reference will be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. While this invention is susceptible of embodiments in many different forms, this specification and the accompanying drawings discloses specific forms as examples of the invention. However, the invention is not intended to be limited to the embodiment so described.  
      In a first embodiment, the present invention is directed to a dispensing closure  1  suitable for being mounted onto a container  2  having a dispensing opening  3 .  
      Referring now to  FIG. 1 , a dispensing closure  1  according to a first embodiment of the invention is represented which is mounted onto a container  2 .  
      Container  2   
      In a preferred embodiment, the container  2  comprises a body portion  4  for holding container content, a lower closed end for supporting said container  2 , an upper end including a neck  5  delimiting a dispensing opening  3 . The dispensing closure  1  of the present invention may be securely mounted onto said container  2 , via its base member  6 , using any means of attachment commonly know to those skilled in the art including cooperative threads, crimping, clipping means, heat sealing force fitting, clasp elements, snap-fit bead, groove arrangements, and mixtures thereof.  
      Preferably, the dispensing closure  1  of the invention is provided with an inner female thread  9  typically located in the base member  6 , as described hereinafter, and the container neck  5  is provided with a male thread  10  formed adjacent its dispensing opening  3 . Typically, the dispensing closure  1  is mounted onto the container  2  with the female thread  9  of the base member  6  screwed on the male thread  10  of the container  2 .  
      Alternatively, the container  2  may not need having a neck  5 . Instead the container  2  may consist of a just a body portion  4  with a dispensing opening  3 . The dispensing closure  1  of the present invention is suitable for use with a variety of conventional or special containers having various designs, the details of which, although not illustrated or described, would be apparent to those skilled in the art. The container  2  may have a rigid wall or walls, or may have a somewhat flexible wall or walls.  
      In a preferred aspect of the invention, the dispensing closure  1  is a separate element which is adapted to be removably or non-removably mounted, via its base member  6 , to a previously manufactured container  2  which has a dispensing opening  3  to the container interior. In an alternative execution, the dispensing closure  1  may be formed as a unitary part, or extension, of the container  2 . The dispensing closure  1  is adapted to be used with a container  2  having a dispensing opening  3  to provide access to the container interior volume and to a product contained therein, which is preferably a pourable product. However, the dispensing closure  1  of the invention may be used with many products, including but not limited to, relatively low or high viscosity liquids, creams, gels, suspensions, mixtures, lotions, pastes, particulates, granular products, and mixtures thereof. Typical products for use in the present invention may be those constituting a food product, a personal care product, an industrial or household cleaning product, or other compositions of matter for use in activities involving manufacturing, commercial or household maintenance, construction, agriculture.  
      Preferably, said pourable product is a liquid composition, more preferably a viscous liquid composition, most preferably a laundry liquid detergent composition.  
      Base Member  6   
      The dispensing closure  1  according to the present invention comprises as a first element, a base member  6 .  FIG. 2  shows a top perspective view of the dispensing closure  1  according to the invention comprising a base member  6  with a cap  16  in its closed position.  
      The base member  6  is intended to be mounted onto a container  2  using any suitable means of attachment as indicated above. Suitable means of attachment are designed so as to provide secure sealing between the dispensing closure  1  and the container  2  vis-à-vis its content.  
      The base member  6  may have any suitable configuration, form or dimension for accommodating an upwardly projecting neck  5  or portion of a container  2 . In a preferred execution of the present invention, the base member  6  has a substantially trapezoidal shape when seen from the top, as represented in  FIG. 8 . The base member  6  is comprised of two distinct parts: a skirt  8  and a deck  7 . The skirt  8  generally forms the external and surrounding wall of the base member  6  and extends substantially towards the container direction, typically parallel to the neck  5  of the container  2 . The deck  7  which typically extends substantially transversely to the longitudinal axis of the container  2  is generally substantially flat and horizontal.  
      More specifically, and as shown in  FIG. 9 , the means for attachment  9  is preferably located onto the inner wall of the base member  6 .  
      As shown in  FIG. 9  and  FIG. 8 , the base member  6  further comprises a draining canal  11  adapted to communicate with the interior volume of the container  2  such as to dispense the container content via the discharging means  12 , when the cap  16  is in its open position.  
      Discharging means  12  for use herein may be readily recognized and selected by those skilled in the art. Preferably, said discharging means  12  is a pouring spout. In a more preferred execution, the discharging means  12  is a beveled spout which extends upwardly from the base member  6 , preferably from the deck  7 . Such preferred spout allows better control and more precise dispensing of the container content, especially viscous liquids such as liquid detergents. It is preferred that said discharging means  12  has a substantially annular shape.  
      In a further preferred embodiment of the present invention, said discharging means  12  is surrounded by a deflecting stem  13  which projects upwardly from the base member  6 . Preferably, the height of the deflecting stem  13  is lower than that of the discharging means  12  so as not to affect the dispensing function of said discharging means  12 . Also, it is preferred that the shape and dimension of the deflecting stem  13  cooperates with the cap  16  so as to ensure improved sealing of said cap  16  vis-à-vis the content of the container  2 . Typically, the deflecting stem  13  is of annular shape and has an outer diameter  14  and an inner diameter  15 . Preferably, the outer diameter  14  of said deflecting stem  13  is flush with that of the cap  16 . The deflecting stem  13  also centers the cap  16  and support said cap  16  from radial deflection.  
      In a highly preferred execution, the deflecting stem  13  is located in such a way as to form spacing between said discharging means  12  and said deflecting stem  13 . Said spacing may preferably take the form of a circular drainer  44  adapted to recuperate any pourable product contained within the container  2 , preferably viscous liquid product, which would not have been properly dispensed from said discharging means  12 . Also, said spacing is preferably provided with apertures (not represented) communicating with the interior of the container  2  so as to permit the recuperated product to be drained back into the container  2 . Additionally, said apertures will also constitute air intake means adapted to allow air to penetrate into the container  2  in response to the evacuation of its content and thereby contribute to a better dispensing of the container content, preferably viscous liquids.  
      The constituting parts of the base member  6  are formed from any suitable material commonly known in the art. Preferably, said parts are all formed from heat sealable thermoplastic materials such as polyethylene or polypropylene single piece. Accordingly, and in a preferred execution of the invention, the base member  6  is a monolithic piece.  
      Cap  16   
      The dispensing closure  1  according to the present invention is further provided with a cap  16 , the role of which is to cover the discharging means  12  in a tight manner vis-à-vis the content of the container  2 .  FIG. 2  and  FIG. 3  show a top perspective view of a cap  16  respectively in its closed and open position.  
      The cap  16  for use herein may have any suitable configuration, form or dimension for accommodating the discharging means  12  comprised in the dispensing closure  1  of the present invention. Suitable caps  16  for use herein will easily be recognized by those skilled in the art. In a preferred execution, the cap  16  has a substantially rounded shape which will allow proper covering of said discharging means  12 . Preferably, the cap  16  has a concave form with the concavity turned towards the direction of the base member deck  7 . The cap  16  for use in the present invention may optionally, but preferably, comprise a transition piece  19  which makes the junction between said cap  16  and said means of articulation  26 . Typically, said transition piece  19  comprises an inner surface  20  and an outer surface  21 .  
      The cap  16  for use herein, preferably possesses a lip assembly including a lip portion  22  and a preferably annular lip stem  23  which projects downwardly from the lip portion  22  and extends around the perimeter of the lip portion  22 . In that preferred embodiment, the base member  6 , and preferably the deck  7  is provided with a receiving recess  24  adapted to tightly fit the lip stem  23  so as to achieve a further improved sealing of said cap  16  onto the base member  6 . According to a preferred embodiment, said receiving recess  24  is of annular shape so as to conform to the preferred annular lip stem  23  and tightly circumvents said deflecting stem  13 . According to an even more preferred embodiment, said cap  16  is provided with an additional plug seal in the form of a secondary annular wall  43  extending downwardly from the inner surface  18  of the cap  16 . It is preferred that the dimensions of said secondary annular wall  43  are adapted so that it can fit into said circular drainer  44  and the diameter of said secondary annular wall is slightly inferior to that of the inner diameter of said deflecting stem  13 . According to this other preferred execution of the present invention, a further improved sealing of said cap  16  vis-à-vis the content of the container  2  is obtained.  
      The cap  16  comprises a sealing means  17  for securing said cap  16  onto said base member  6  thereby providing secure sealing vis-à-vis the content of the container  2 .  
      Said sealing means  17  is designed so as to inter-engage locking means  34  comprised in the flexible member  30  as described hereinafter. In a highly preferred embodiment, the sealing means  17  is at least one hook, preferably two hooks.  
      In a preferred execution of the present invention, said sealing means  17  is located in the lip stem  23  at selected locations. In such a preferred execution, the above-described receiving recess  24  may be provided with apertures  25  adapted to permit said sealing means  17  to traverse through said base member  6 , preferably said deck  7  and thereby inter-engage said locking means  34  located in said flexible member  30 . Preferably, said sealing means  17  is positioned in the lip stem  23  at the opposite side with respect to the hinge assembly which will be described hereinafter. More preferably, said sealing means  17  are located diametrically opposite to the means of articulation  26 , as will be described below.  
      The cap  16  for use in the present to the present invention may be formed from any suitable material commonly known in the art. Preferably, said cap  16  is formed from heat sealable thermoplastic materials such as polyethylene or polypropylene single piece.  
      Means of Articulation  26   
      According to the present invention, and as represented in particular in  FIG. 3 ,  FIG. 4  and  FIG. 5 , the cap  16  is mounted via a means of articulation  26  onto the base member  6 , preferably onto the deck  7  of said base member  6 , between a closed position whereby said discharging means  12  is completely covered by said cap  16  and a open position whereby said discharging means  12  is completely uncovered. According to a preferred execution of the present invention, when the cap  16  is in its completely open position, the cap  16  forms an angle of at least 180° with respect to the substantially horizontal plan formed by the base member deck  7 . Accordingly, the user is allowed to watch and control the discharging means  12  during the whole course of the dispensing operation.  
      The means of articulation  26  joins the cap  16  to the base member  6  and is typically designed so as to permit said cap  16  to pivot around a pre-determined axis. Suitable means of articulation  26  for use herein will easily be recognized by those skilled in the art. According to a preferred embodiment of the present invention, the means of articulation  26  is a hinge-type assembly which may be conventionally known hinges selected from the group of pivot-hinge, “butterfly-hinge” and “three-legged-hinge” also known as living hinge.  
      In one preferred execution, and as represented in  FIG. 3  and  FIG. 4 , the means of articulation  26  is in the form of a pivot-hinge comprising a pivotation piece  27  and a pivot  28 . According to another preferred embodiment of the present invention, the means of articulation  26  is a three-legged hinge comprising three articulation legs. In still another preferred embodiment, the means of articulation  26  is butterfly-hinge  29 , as represented in  FIG. 5 .  
      In another aspect of the invention, said means of articulation  26  may be adapted so as to elastically force the cap  16  back towards its open position. More specifically, the means of articulation  26  shall be designed such that the energetically stable position is the open position. Also, when said cap  16  is mechanically pivoted towards the closed position, the means of articulation  26  is subjected to bending and/or compressive deformation which in response creates an elastic restoring force which forces said cap  16  back towards its open position, in particular to its completely open position.  
      A suitable means of articulation  26  according to this other aspect of the invention is described e.g. in WO 2004/110889. However, other suitable configurations may be easily recognized by those skilled in the art.  
      The means of articulation  26  for use herein may be formed from any suitable material commonly known in the art. Preferably, said means of articulation  26  is formed from the same material as that used to form the cap  16  and/or the base member  6 . According to one embodiment, the base member  6 , the cap  16  and the means of articulation  26  may be formed as a single piece, preferably from the same thermoplastic material such as polyethylene or polypropylene. According to this specific embodiment, the different parts may be advantageously molded within a single injection molding operation which therefore involves both a simple and economical manufacturing process.  
      Flexible Member  30   
      The dispensing closure  1  according to the present invention further comprises a flexible member  30 .  FIG. 4  is an exploded perspective view of the dispensing closure  1  according to the invention in its open position, wherein are represented the base member  6 , the cap  16 , the means of articulation  26  and the flexible member  30  separately. As for  FIG. 7 , this is a top perspective view of the dispensing closure  1  according to the invention from which the base member  6  has been removed and which represents the flexible member  30  and the cap  16  in its closed position.  
      The flexible member  30  is lodged within the base member  6  in a suitable housing  31 . The flexible member  30  may have any suitable configuration, form or dimension for accommodating the configuration of the base member  6  and in particular the internal volume of the base member  6 . In a preferred execution of the present invention, wherein the base member  6  has a substantially cylindrical shape fused with a substantially square shape, as represented in the accompanying drawings, the flexible member  30  is provided with a similar overall shape as represented in  FIG. 11 . In such a preferred execution, the flexible member  30  is in the form of a substantially thin strap having substantially the same height as that of the skirt  8  and which is provided with an upper lip  32  and lower lip  33 .  
      The flexible member  30  for use herein comprises as a first element a locking means  34  which is adapted to inter-engage said sealing means  17 . Suitable locking means  34  for use herein will be readily apparent to those skilled in the art. Examples of suitable locking means  34  include but are not limited to hooks, clasp elements, protrusions, apertures, spigots or plugs.  
      Sealing means  17  and locking means  34  shall imperatively be selected so as they cooperate to form a locking system. Such locking systems are well within the competence of the skilled person.  
      The locking systems for use in the present invention, allow said locking means  34  to securely inter-engage said sealing means  17  in such a way that the cap  16  is efficiently maintained in its closed position onto the base member  6  even when the container  2  on which the dispensing closure  1  of the present invention is mounted, is involuntarily dropped on the floor.  
      According to a preferred embodiment of the present invention, said locking means  34  is a clasp element as represented in particular in  FIG. 7  and  FIG. 10 . This specific locking means  34  is particularly well adapted to inter-engage the hooks located in the preferred cap  16  for use in the present invention.  
      The flexible member  30  further includes an actuating means  35  which is an integral part of said flexible member  30 . The actuating means  35  may have any suitable configuration, form or dimension for accommodating the configuration of the flexible member  30 . As will be easily appreciated by those skilled in the art, multiple configurations may be suitably used for such an actuating means  35 .  
      The actuating means  35  is, when actuated, capable of disengaging said locking means  34  from said sealing means  17  thereby causing said cap  16  to be released back towards its open position due to the antagonist restoring force generated by the elastic deformation of said means of articulation  26  when said cap  16  is mechanically forced towards its closed position.  
      According to a preferred embodiment of the present invention, said actuating means  35  is in the form of a pushing button, as represented in the accompanying drawings. Said pushing button may be of any shape commonly known in the art, including but not limited to circular, square, rectangular, ovoid or triangular. More preferably, said pushing button has a square shape, preferably provided with a centrally positioned cavity  36  so as to facilitate the pushing action by a finger of the user.  
      The actuating means  35  may be located at any suitable position provided it is easily accessible by the user&#39;s fingers. Such suitable positions may be readily identifiable by the person skilled in the art. However, according to a preferred execution of the invention, the actuating means  35  advantageously projects out from the skirt  8  via an opening  37  created into the skirt  8  for that purpose. According to a more preferred embodiment, said actuating means  35  is located at a specific position (see e.g.  FIG. 3 ) nearby the means of articulation  26  so as to provide improved opening/closing ergonomics. Preferably, said actuating means  35  is operated by using one finger of the same hand that is used to hold the container  2  during the dispensing operation. Furthermore, it is preferred that said actuating means  35  be fixed to a pivot stem  38  so that said actuating means  35  is allowed to pivot around a fictive axis when said actuating means  35  is under actuation without said actuating means  35  being unfavourably displaced during actuation.  
      In a preferred aspect, the flexible member  30  is provided with a resiliently deformable portion  39  which is temporarily and elastically stressed when said actuating means  35  is mechanically actuated and which provides a restoring force back towards the normal position of said actuating means  35  once said actuation operation is removed.  
      Preferably, the resiliently deformable portion  39  is an accordion-like spring as represented for example in  FIG. 7 . The flexible member  30  for use herein may be optionally provided with an additional spring means (not represented) suitably located and which is designed such as to provide a further improved restoring force, as above described.  
      In the normal course of a closing/opening operation, while said cap  16  is in its closed position, the actuating means  35  is mechanically actuated so as to make said flexible member  30  translating within the housing  31  thereby disengaging said locking means  34  from said sealing means  17 . Due to the restoring force created into the resiliently deformable portion  39  during actuation of the actuating means  35 , said flexible member  30  is resiliently forced back towards its initial position into the housing  31 .  
      The flexible member  30  for use herein may be formed from any suitable material commonly known in the art. Preferably, said flexible member  30  is formed from the same material as that used to form the cap  16  and/or the base member  6  and/or the means of articulation  26 . According to preferred embodiment, the flexible member  30  may be formed as a single piece, preferably from the same thermoplastic material such as polyethylene or polypropylene. According to this specific embodiment, the different parts of the flexible member  30  may be advantageously molded within a single injection molding operation which involves therefore a both simple and economical manufacturing process.  
      Complementary Means  40 , 41  Capable of Releasing Said Cap  16  Back to its Open Position  
      The dispensing closure  1  of to the present invention further comprises complementary means  40 , 41  capable of releasing said cap  16  back towards its open position once said locking means  34  have been disengaged from said sealing means  17 .  
      Complementary means  40 , 41  for use in the present invention are located in said cap  16  and in said flexible member  30 . Suitable complementary means  40 , 41  for use herein will easily be recognized by those skilled in the art, as this is well within the common practice in the field. Typically, said complementary means  40 , 41  are based on a spring-like effect.  
      According to a preferred embodiment of the present invention, said complementary means  40 , 41 , take the form of a cooperative combination of a flexible piece  40  and a corresponding fixed structural element  41 . Preferably, said flexible piece  40  is elastically stressed when compressed by said structural element  41 .  
      In a very preferred execution, said flexible piece  40  is located in the flexible member  30 , preferably on its upper lip  32  and nearby the actuating means  35 . As for the corresponding structural element  41  it is preferably located on the cap  16 , even more preferably located on the inner surface  20  of the transition piece  19 . According to such a preferred execution, the deck  7  may preferably be provided with an aperture  42  adapted such as said structural element  41  is able to traverse through the deck  7  and come into contact with the flexible piece  40 , such as shown in  FIG. 4 .  
      In a highly preferred embodiment of the present invention, the flexible piece  40  is a flexible arm, preferably an inclined flexible arm, and the structural element  41  is in the form of a flange, preferably a sharp flange, more preferably a sharp and beveled flange, as represented in  FIG. 4 . However, the present invention is not so limited. The flexible piece  40  and the structural element  41  shall be configured so as they cooperate to form a dynamic spring-like system. Such dynamic spring-like systems are well within the competence of the skilled person.  
      The complementary means  40 , 41  are aimed at releasing, preferably pushing, said cap  16  back towards its open position and are preferably able to quickly flip open said cap  16  over an angle of preferably at least 180° with respect to the horizontal plan formed by the deck  7 .  
      According to a highly preferred execution of the present invention and in the normal course of an opening operation, while said cap  16  is in its closed position, the structural element  41  does not put any elastic stress on the flexible piece  40 . However, when the actuating means  35  is mechanically actuated, said flexible member  30  translates within the housing  31 . Concurrent to said translation motion, and due the particular shapes and configurations of the structural element  41  and the flexible piece  40 , the structural element  41  increasingly compresses said flexible piece  40  downwardly, putting an increasing elastic stress on it. When said flexible member  30  has translated enough to disengage said locking means  34  from said sealing means  17 , the cap  16  is pushed back towards its open position due to the energy stored when said flexible piece  40  is compressed thereby creating an upwardly restoring force parallel to a fictive vertical axis. Also, due to the restoring force created into the resiliently deformable portion  39  during actuation of the actuating means  35 , said flexible member  30  is resiliently forced back towards its initial position into the housing  31  when said mechanical actuation is discontinued.  
      In the context of the present invention, it is preferred that said complementary means  40 , 41  are integrally part of the specific elements they are located in. More specifically and according to a highly preferred embodiment, said flexible piece  40  is preferably integrally part of said flexible member  30  and said structural element  41  is preferably integrally part of said cap  16 .  
      Container Closure Assembly  
      In another embodiment, the present invention is directed to a container closure assembly, comprising: 
          (a) a container  2  having a body portion  4  for holding the container content, a lower closed end for supporting the container  2 , an upper end including a means of attachment thereon adapted to receive and affix a dispensing closure for containers;     (b) a dispensing closure  1  according to the invention, mounted on the container  2 . 
 
 A Method of Dispensing the Content of a Container  2  
       

      The present invention further encompasses a method of dispensing the content of a container  2  comprising the steps of: 
          (a) providing a container closure assembly according to the invention, wherein said cap  16  is in its closed position;     (b) actuating said actuating means  35  so as to release said cap  16  back towards its open position;     (c) pouring the required amount of the container content through said dispensing means;     (d) mechanically closing said cap  16  back towards its closed position.        

      Use of a container closure assembly according to the invention, for dispensing a liquid composition.  
      In a further embodiment, the present invention is directed to the use of a closure assembly according to the present invention for dispensing a liquid composition, preferably a liquid detergent composition, most preferably a liquid laundry detergent composition.  
      The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as “40 mm” is intended to mean “about 40 mm”.  
      All documents cited in the Detailed Description of the Invention are, in relevant part, incorporated herein by reference; the citation of any document is not to be construed as an admission that it is prior art with respect to the present invention. To the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern.  
      While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims to all such changes and modifications that are within the scope of this invention.