Abstract:
A method of molding a container closure providing selective fluid communication between an interior of a fluid container and an exterior environment, the method comprising: (i) configuring and closing a mold having a first cavity negatively defining a base of a container closure that includes a spout and a container mount, where the spout and container mount cooperate to define a conduit therethrough in fluid communication with an outlet orifice of the spout; (ii) injecting a first material into the first cavity to mold the base; (iii) cooling the first material in the mold to impart at least minimal rigidity to the base; (iv) reconfiguring at least a portion of the mold to define a second cavity adjacent to the first material, the second cavity negatively defining a cap covering the outlet orifice of the spout; (v) injecting a second material into the second cavity to mold the cap over the outlet orifice; (vi) cooling the second material in the mold to impart at least minimal rigidity to the cap; and (vii) removing the base and integrally formed cap from the mold.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS  
       [0001]     This nonprovisional patent application claims priority to and benefit from U.S. provisional patent application Ser. No. 60/803,026, filed on May 23, 2006, under 37 CFR § 119(e) and is a continuation-in-part of currently pending nonprovisional patent application Ser. No. 11/740,074, filed Apr. 25, 2007, which claims priority to and benefit from U.S. provisional patent application Ser. No. 60/745,560, filed on Apr. 25, 2006, under 37 CFR § 119(e). 
     
    
     BACKGROUND OF THE INVENTION  
       [0002]     1. Field of the Invention  
         [0003]     The present application is related to closures for fluid containers utilizing overmolded components; and, more specifically, to closures where the spout and base component of the closure is molded in a first molding step and a repositionable or removable cap is molded over at least the spout of the closure in a second molding step.  
         [0004]     2. Brief Discussion of Related Art  
         [0005]     Container closures for certain beverage and condiment dispensers include a cylindrical base portion and a spout portion extending from the base portion. The base portion is typically threaded to be mounted to a mount of the dispenser. In this manner, fluid product from the interior of the dispenser is generally withdrawn through the spout portion, and when product is no longer desired to be withdrawn, the spout portion is closed by a removable or repositionable cap. The spout may be closed by a removable overcap or a retained cap repositionably mounted to the spout.  
         [0006]     Certain container closures include base and spout portions that are molded with circumferential grooves or channels that are adapted to accept a circumferential ring of the retained cap. With such closures, the base and spout portion and the retained cap are individually molded apart from one another in separate processes. In other words, the base and spout portion is completely molded and the retained cap is completely molded, only thereafter to have the circumferential ring of the retained cap be frictionally fit within the groove of the base and spout portion to allow the cap to be mounted to the base and spout portion even when the cap does not close the orifice in the spout portion. It should be understood that the friction fit is the primary prior art means used to mount the cap to the spout portion.  
       SUMMARY  
       [0007]     The present application is related to closures for fluid containers utilizing overmolded components; and, more specifically, to closures where the spout and base component of the closure is molded in a first molding step and a repositionable or removable cap is molded over at least the spout of the closure in a second molding step.  
         [0008]     Accordingly, it is a first aspect of the invention to provide a method of molding a container closure providing selective fluid communication between an interior of a fluid container and an exterior environment, the method comprising: (i) configuring and closing a mold having a first cavity negatively defining a base of a container closure that includes a spout and a container mount, where the spout and container mount cooperate to define a conduit therethrough in fluid communication with an outlet orifice of the spout; (ii) injecting a first material into the first cavity to mold the base; (iii) cooling the first material in the mold to impart at least minimal rigidity to the base; (iv) reconfiguring at least a portion of the mold to define a second cavity adjacent to the first material, the second cavity negatively defining a cap covering the outlet orifice of the spout; (v) injecting a second material into the second cavity to mold the cap over the outlet orifice; (vi) cooling the second material in the mold to impart at least minimal rigidity to the cap; and (vii) removing the base and integrally formed cap from the mold.  
         [0009]     It is a second aspect of the present invention to provide a method of overmolding a repositionable cap onto a container closure, the method comprising the steps of: (i) configuring and closing a mold housing a container closure base to at least partially define a mold cavity approximate a spout of the container closure base; (ii) injecting a first material into the mold cavity to overmold a cap over the spout that closes an outlet orifice of the spout; (iii) cooling the second material to impart at least minimal rigidity to the cap; and (iv) removing the base and overmolded cap from the mold.  
         [0010]     It is a third aspect of the present invention to provide a method of imparting a tamper evident indicia to an injection molded product, the method comprising: (i) molding a first component of a product; and (ii) molding a second component of the produce over the first component to create a bond between the first component and the second component, where the second component includes at least one of a transparent property and a translucent property so that bonded portions of the first and second components exhibit a color that is a combination of colors of the overmolded portions of the first and second components, where breaking of the bond substantially removes the combination color in the areas where the bond has been broken.  
         [0011]     It is a fourth aspect of the present invention to provide a closure for a fluid container comprising: (i) a container fitting including: (a) a distal container receiver adapted to couple the container fitting to a container, thereby providing a fluidic seal between the container fitting and the container; (b) a proximal spout including a conduit therethrough that is in communication with a proximal orifice of the spout through which material flowing through the conduit is adapted to egress from the container fitting; and (c) a lid that is repositionable between a closed position closing off the proximal orifice of the spout, and an open position opening the proximal orifice of the spout, where the lid is molded in the closed position over the proximal spout to provide a sealed fluidic interface between the lid and the spout. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0012]      FIG. 1  is a cross-sectional view of an additional exemplary closure in accordance with the present invention;  
         [0013]      FIG. 2  is a cross-sectional view of the closure of  FIG. 1  offset 90 degrees;  
         [0014]      FIG. 3  is a rear perspective view of the closure of  FIG. 1 ;  
         [0015]      FIG. 4  is an elevated perspective view of the closure of  FIG. 1 , where the lid is in the open and closed position;  
         [0016]      FIG. 5  is a cross-sectional view of an exemplary mold to fabricate a first aspect of the closure of  FIG. 1 ;  
         [0017]      FIG. 6  is a cross-sectional view of an exemplary mold to fabricate a second aspect of the closure of  FIG. 1 , thereby finishing the molding of the closure as shown in  FIG. 1 ;  
         [0018]      FIG. 7  is an overhead, cut-away view of the mold of  FIG. 6  showing the flow of the polymer to form the second aspect of the closure;  
         [0019]      FIG. 8  is rear view of an alternate exemplary hinge structure for the closure of  FIG. 1 ;  
         [0020]      FIG. 9  is a rear, top perspective view of an embodiment of a two shot dispenser in a closed configuration;  
         [0021]      FIG. 10  is a rear view of the two shot dispenser of  FIG. 9 ;  
         [0022]      FIG. 11  is a front view of the two shot dispenser of  FIG. 9 ;  
         [0023]      FIG. 12  is a sectional view of the two shot dispenser of  FIG. 11  taken along the line AA;  
         [0024]      FIG. 13  is an enlarged, side view of the overshot of  FIG. 9 ;  
         [0025]      FIG. 14  is a top perspective view of the two shot dispenser of  FIG. 9  in an open configuration;  
         [0026]      FIG. 15  is a top perspective view of the two shot dispenser of  FIG. 9  illustrating a dust cover;  
         [0027]      FIG. 16  is a top perspective view of the two shot dispenser of  FIG. 9  illustrating a shrink wrap;  
         [0028]      FIG. 17  is a side view of another embodiment of a two shot dispenser in a closed configuration;  
         [0029]      FIG. 18  is a rear view of the embodiment of  FIG. 17  illustrating the hinge mechanism;  
         [0030]      FIG. 19  is a top view of the embodiment of  FIG. 17 ;  
         [0031]      FIG. 20  is a partial sectional view of the two shot dispenser of  FIG. 17  with portions of the two shot dispenser partially broken away;  
         [0032]      FIG. 21  is a top perspective view of the two shot dispenser of  FIG. 17  in an open configuration. 
     
    
     DETAILED DESCRIPTION  
       [0033]     The exemplary embodiments of the present invention are described and illustrated below to encompass methods of fabricating container closure and the closures produced utilizing such methods. Of course, it will be apparent to those of ordinary skill in the art that the preferred embodiments discussed below are exemplary in nature and may be reconfigured without departing from the scope and spirit of the present invention. However, for clarity and precision, the exemplary embodiments as discussed below may include optional steps, methods, and features that one of ordinary skill should recognize as not being a requisite to fall within the scope of the present invention.  
         [0034]     Referring to  FIGS. 1-4 , an exemplary closure  400  includes a base  402  and an overmolded repositionable cap  404  that are adapted to cooperate to retain the contents of a container (not shown) when the closure  400  is mounted to the container. The base  402  includes a circumferential wall  406  that forms a conduit through which fluid flows from the interior of the container and out an outlet orifice  408  in the proximal end  410  of the wall. The circumferential wall  406  includes a tamper-evident band  412  connected to a threaded, cylindrical container mating portion  414  that are adapted to be mounted to the throat of the container. The tamper-evident band  412  includes a plurality of projections  416  circumferentially spaced along an interior surface  418  thereof. Each projection  416  includes a contoured leading edge  420  having an arcuate wall  422  that extends radially inward and intersects with a topside ledge  424  and a backside wall  426  that each extend perpendicularly inward from the interior surface  418 . A plurality of bridges  428  extend between and connect the tamper-evident band  412  to the container mating portion  414 . These bridges  428  are adapted to be broken when the closure  400  is first removed from the container, thereby separating the tamper-evident band  412  from the container mating portion  414 . The bridges  428  are broken when either or both of the topside ledge  424  and the backside wall  426  catch one or more corresponding projections from the throat of the container so that continued upward movement of the closure  400  tensions the bridges  428  beyond their breaking points.  
         [0035]     The container mating portion  414  includes a cylindrical wall  430  that intersects with a radially inwardly extending wall  432  that transitions concurrently into a circumferential, axially, extending flange  434  and an opposed frustoconical wall  436 . The cylindrical wall  430  includes an interior surface  438  having helical threads  440  extending radially inward that are adapted to interact with a corresponding helical projection on the throat of the container to allow the closure  400  to be rotationally mounted and dismounted from the container. An exterior surface  442  of the cylindrical wall  430  includes a plurality of vertically oriented and spaced apart ribs  444  adapted to enable a user to more easily grip and rotate the closure  400  with respect to the container.  
         [0036]     The cylindrical wall  430 , the radially inwardly extending wall  432 , and the circumferential flange  434  cooperate to define a circumferential inverted U-shaped profile that is adapted to be seated upon the top wall of the mouth of the container. A circumferential projection  446  extends from an interior surface  448  of the radially inwardly extending wall  432  and cooperates with the flange  434  to guide a top wall of the mouth of the container into contact with a sealing ring  450  also extending from the radially inwardly extending wall  432 . The sealing ring  450  is adapted to compress and seal against the top wall of the mouth of the container when the closure  400  is mounted to the container.  
         [0037]     An exterior surface  452  of the radially inwardly extending wall  432  includes a circumferential lip  454  that separates complementary circumferential grooves  456 ,  458 . Each groove  456 ,  458  receives part of a retaining ring  460  molded thereover to mount the repositionable cap  404  to the base  402 . As will be discussed in more detail below, the lip  454  increases the surface area for bonding between the retaining ring  460  and the base  402 , thereby providing a more secure connection. Two legs  462  that are bonded to an exterior surface  464  of the frustoconical wall  436  extend from the retaining ring  460 . The legs  462  converge to form a backbone  466  that extends parallel to exterior surface  464  of the frustoconical wall  436 , where the proximal segment of the backbone  466  includes rigidity ribs  467  that transition into a lid  468  that is removably bonded to the proximal end  410  of the circumferential wall  406  to close the outlet orifice  408  of the spout formed by the frustoconical wall  436  and completely cover the entire exposed surface of the proximal end  410 . The lid  468  includes a downwardly extending circumferential plug  470  that is adapted to be frictionally received by the outlet orifice  408  to seal the outlet orifice. A tapered lip  472  of the lid  468  overhangs the exterior surface  464  of the frustoconical wall  436  and is adapted to receive an upward manual force. When manual force is applied upwardly against the lip to force the lid off of the spout and the plug  470  from the outlet orifice  408 , the reduced thickness of the legs  462  to provide a living hinge  474  about which the backbone  466  and lid  468  pivot with respect to the retaining ring  460  and the base  402 . The backbone  466  includes an outwardly extending prong  474  that is adapted to be pivoted inwardly and be received by a corresponding depression  476  within the exterior surface  464  of the frustoconical wall  436 , thereby retaining the hinge in the open position. When the backbone  466  and lid  468  pivot approximately 90° or more, the prong  474  continues to extend outward from the backbone  466  and is wedged against the exterior surface  464  of the frustoconical wall  436  to retain the backbone  466  and lid  468  in the pivoted position. A force applied to one or more of the top of the lid  468  and the back side of the backbone  466  is operative to deform the prong  474  out from the depression  476  allowing the backbone  466  and lid  468  to pivot to the closed position.  
         [0038]     Referencing  FIGS. 4-7 , the exemplary closure  400  is fabricated in a two-shot injection molding process. In the first shot, the first and second blocks  500 ,  502  of the mold  504  are brought together to provide an internal cavity having negative dimensions and features representative of the base  402  discussed above. A polymer, such as polypropylene, is injected into the cavity to form the base  402 . The polymer is allowed to sufficiently harden so that the mold  504  may be opened without substantially deforming the base  402 . The first block  500  of the mold  504  is thereafter withdrawn from the second block  502  to remove the base  402  from the second block  502  and expose the exterior surface  452  of the radially inwardly extending wall  432  and the exterior surface  464  of the frustoconical wall. A third block  508  of the mold  504  is then brought into contact with the first aspect  500  to provide an internal cavity having dimensions and features representative of the repositionable cap  404  discussed above, adjacent to the exposed portions of the base  402 . A second polymer, such as polyethylene, is injected into the cavity to form the repositionable cap  404  in a second shot over the exposed portions of the base  402 . The polymer forming the repositionable cap  404  is allowed to sufficiently harden so that the mold  504  may be opened without substantially deforming the cap  404 . Thereafter, the third block  506  is separated from the first block  500  and a finished closure  400  is removed from the first block  500 .  
         [0039]     Referring to  FIGS. 1-7 , the two-shot process discussed above molds the repositionable cap  404  to the base  402  so as to form a band and a seal at the interface between the two components. This is particularly advantageous where, as here, the molding process molds the cap  404  in not only a closed position, but with a fluidic seal with respect to the outlet orifice  408  in the proximal end  410  of the base  402  and the lid  468 .  
         [0040]      FIG. 7  provides an exemplary injection point  510  where the second polymer is first introduced to fill those aspects of the circumferential grooves  456 ,  458  farthest from the legs  462 . It is important to understand that injection molded polymers flow like streams of viscous fluids. As more polymer is introduced, the pressure and additional polymer force the initially injected polymer outward and around the frustoconical wall  436  in two arcuate polymer streams. As further polymer is introduced, the polymer at the lead end of each stream begins to cool and becomes more resistant to flow. The polymer material continues to flow in these two streams to form the legs  462 , until the two polymer streams converge to form the backbone  466  and lid  468 , thereby completely covering and sealing the outlet orifice  408  in the proximal end  410  of the base  402 . The mold  504  is designed so that the molding of the lid  468  and the backbone  466  coincide with the lead end polymer becoming increasingly viscous so much so that the injection molding equipment can no longer inject polymer to force the lead end material further into the mold.  
         [0041]     In a further exemplary application of the two-shot molding process, the repositionable cap  404  and the base  402  include a tamper evident indicia visually apparent when the seal between the cap  404  and base  402  has not been compromised. For example, the base may be fabricated from a blue polyethylene material and the cap may be fabricated from a yellow polyethylene material that is substantially transparent and/or translucent. Thus, the overmolded portions of the cap will exhibit a green color combination of blue and yellow materials being bonded to one another. In this example, the yellow polyethylene material is transparent so that an overhead view of the closure  400  after molding would reveal a dark green ring around a yellow circle, evidencing that the seal was intact between the cap  404  and base  402 , particularly with respect to the seal between the outlet orifice  408  and the circumferential plug  470 . When a user of the closure  400  first peels the lid  468  back to displace the circumferential plug  470  from the outlet orifice  408 , thereby discontinuing the seal therebetween, the overhead view of the closure  400  would reveal a very faint green ring around a yellow circle (or no green color at all), evidencing that the seal was no longer intact between the cap  404  and base  402 , particularly with respect to the seal between the outlet orifice  408  and the circumferential plug  470 . The absence of the dark green ring would alert a potential user than the lid has been previously been opened.  
         [0042]     Simply put, the visual indicia is the difference in appearance when the cap and base continue to have a bond or a seal therebetween and the appearance when no bond/seal is present between the cap and base. In other words, the absence of presence of a visual cue alerts the user of the sealed or unsealed state. Along these same lines, it is also within the scope of the invention that the dominant visual cue be apparent after the cap has been initially repositioned from the base, thereby discontinuing the bond/seal therebetween. Those of ordinary skill will readily understand that various color combinations can be utilized to provide a color change once a molded seal is discontinued, such as, without limitation, a red base  402  and a yellow cap  404 , and a blue base  402  and a red cap  404 .  
         [0043]     Referring to  FIG. 8 , an alternate exemplary hinge structure  600  is shown. This exemplary hinge  600  is analogous to the living hinge  474  of  FIG. 1  and may be used in lieu of the living hinge  474  of  FIG. 1 . The hinge line is shown with a dotted line and is vertically elevated with respect to the living hinge  474  of  FIG. 1 . It should be noted that his hinge structure  600  provides for a continuous ring  602  around the circumference of the base  604  to inhibit rotation of the cap  606  about the base.  
         [0044]     As shown in  FIG. 9-16 , one embodiment of the mold-in-place two shot seal, includes a two shot dispenser  20 . Two shot dispenser  20  is provided having a dispensing feature that is recloseable with a peel apart bond molded seal which facilitates a tight and engaging seal and reseal from being “molded closed” during manufacture. “Molded closed” refers that the two shot dispenser is molded in a closed configuration. Two shot dispenser  20  facilitates the dispensing of the contents of a tube, bottle or similar container. Two shot dispenser  20  comprises of an overshot  30  and an undershot  40 . Overshot  30  is bond molded to the surfaces of undershot  40 .  
         [0045]     As shown in  FIG. 12 , undershot  40  is threadably attached to a container finish  10 . Container finish  10  has a neck  12  which defines an aperture  16  of the container. Undershot  40  has a top wall  46  in which an inner wall  44  and an outer wall  42  depend therefrom. Inner wall  44  creates a seal upon the interior surface of aperture  16  of container finish  10 . Outer wall  42  threadably engages at least one thread  14  on the exterior of container neck  12 . Outer wall  42  may also have a tamper indicating ring  70  depending therefrom that engages container finish  10 . Tamper indicating ring  70  remains attached to container finish  10  if undershot  40  was partially removed or removed in its entirety. Overshot  30  is bond molded directly to the surface of the undershot  40 . Overshot  30  may be molded to undershot  40  from top wall  46  up to and including a spout portion  46 . Spout portion  46  contains an orifice  48  through which contents of the container are dispensed. However, orifice  48  of spout portion  46  is tightly sealed during the molding process. A depending skirt  33  of overshot  30  engages orifice  48  creating a “mold to fit orifice” seal, which will be described herein.  
         [0046]     Although the container is shown in detail, it is merely representative of containers in general, and it is to be understood that there are many variations of containers that may be used with the two shot dispenser. It is also understood that undershot  40  may be removably as well as nonremoveably engaged to container finish  10  and still be within the spirit of the present invention.  
         [0047]     As shown in  FIGS. 9-13 , overshot  30  may include a removable panel  34 . Removable panel  34  functions as a line of demarcation between a flip-top cap  30   a  and a flip-top body  30   b . Removable panel  34  divides flip-top cap  30   a  and body  30   b  about the hinge mechanism. An upper portion of removable panel  34  may be connected to flip-top cap  30   a  by a breakable web  35 . While a lower portion of removable panel  34  may be connected to flip-top by a breakable web  36 . These breakable webs  35 ,  36  acts as tamper indicating device. When a user pushes or pulls on either tabs  37 ,  38 , the breakable webs  35 ,  36  can be broken which clears the line of demarcation between flip-top cap  30   a  and flip-top body  30   b . With removeable panel  34  removed from overshot  30 , the flip-top cap  30   a  can travel from a closed configuration ( FIG. 9 ) to an open configuration ( FIG. 14 ) about the hinge mechanism. A thumb or finger lift  39   a  is positioned on flip-top cap  30   a  to assist in opening. Portions of removable panel  34  may also be bond molded to undershot  40  as to aid in sealing and color differentiating for use as a tamper indicating device.  
         [0048]     The hinge mechanism of two shot dispenser  20  allows for the dispenser to be recloseable. Flip-top cap  30   a  can travel from an open configuration ( FIG. 9 ) to a closed configuration ( FIG. 14 ). In the open configuration contents (not shown) can be dispensed. As illustrated in  FIGS. 9, 10 ,  13 , and  14 , the hinge mechanism of overshot  30  of two shot dispenser  20  comprises of a plurality of openings defining the hinge. The plurality of openings is substantially crescent shaped and are further defined as a left crescent opening  50  and a right crescent opening  60 . Openings  50 ,  60  divide the hinge mechanism into a left hinge arm  31 , a right hinge arm  32 , and a center hinge  39 . Each crescent opening  50 ,  60  have an upper arch  52 ,  62  and a lower arch  53 ,  63 . As shown in  FIGS. 10 and 13 , left crescent opening  50  has upper arch  52  extending to a point over hinge arm  31  and lower arch  53  extending to a point under hinge arm  31 . As shown in  FIG. 10 , right crescent opening  60  has upper arch  62  extending to a point over hinge arm  32  and lower arch  63  extending to a point under hinge arm  32 . Each opening  50 ,  60  may also include tapering edges at various locations surrounding the interior of the opening to further expand the size of the opening and/or may aid in the cap to remain substantially open. A single taper or combination of different tapers located about the openings  50 ,  60  may be tapered or reverse tapered from the exterior surface of the flip-top cap. The hinge mechanism of two shot dispenser  20  allows flip-top cap  30   a  to travel to an open configuration ( FIG. 9 ) wherein the cap is substantially open to allow dispensing of a variety of different contents known in the art. Interference by flip-top cap  30   a  in dispensing is minimized due to the maximization of the hinge mechanism to open the cap to a sufficient degree of clearance. The hinged flip-top cap  30   a  may flex below 90 degrees when in the open configuration. A user may drink from the dispenser without substantial interference from flip-top cap  30   a  as it remains fully open.  
         [0049]     Although overshot  30  and undershot  40  is shown in detail, it is merely representative of one embodiment, and it is to be understood that there are many variations that may be used to create a two shot seal between an overshot and undershot. For example, a hinge does not have to be included as an option on the overshot. It is also understood that an overshot can be a removable cap bond molded (“closed molded”) to an undershot and still be within the spirit of the present invention.  
         [0050]     The mold-in-place two shot seal of dispenser  20  is capable of being molded in a closed position. There may be two separate steps in formation of the two shot dispenser  20 . The first step in the mold process involves the creation of the undershot by injection molding. The second step in the mold process involves injection molding the overshot to the undershot. During the manufacturing of two shot dispenser  20 , the dispenser is “molded closed”. “Molded closed” is referring that overshot  30  is in its closed configuration ( FIG. 9 ) when molded to undershot  40 . Enhanced sealing capabilities between the overshot and undershot are created from being molded in a closed position. After the undershot is molded in the first mold cavity, the undershot may be rotated into a cooling position before being rotated into position for the second step of the molding process. During the second step of the process, the overshot is molded directly to the existing undershot. The temperature created during the molding of the overshot may be minimized in order to minimize the adverse effect of additional heat onto the existing undershot. The plastic material injected during the second step of the closed molded process should have a lower melting temperature than the plastic material injected during the first step of the process to minimize imperfections. One option would be to have an overshot comprising of polyethylene molded onto an undershot comprising of polypropylene. Another option, may be to have an overshot comprising of polypropylene molded onto an undershot comprising of polyethylene terephthalate. Different grades of plastic or combinations of plastics may be used in the formation of the two shot dispenser. If a hinge mechanism is required in the application of the two shot dispenser, an increase in change in temperature of the two plastic compounds&#39; melting points should allow for a more resilient hinge. Although specific compounds were described above, it is to be understood that a variety of materials known in the art may be used within the formation of the closed positioned two shot mold and still be within the spirit of the present invention.  
         [0051]     Because two shot dispenser  20  is “molded closed”, the mold cavity is capable of substantially increasing the total number of molded parts per cycle due to the maximization of space within the mold cavity die. The two shot dispenser is molded closed instead of open. If molded open there is space in the mold cavity that is lost to the open configuration unlike that of a molded closed configuration which maximizes the available space within the die. Also, the lower melting temperature of the material needed for the second step of the molding process reduces the amount of heat needed during the molding of overshot. By creating a mold closed design, the two shot dispenser does not have to be handled in another manufacturing step for closing the overshot. Also, once the seal is created between the overshot and undershot the part may be shipped without any other action on the closure. From the previous description above, the design may increase efficiency of manufacture by reducing the handling of parts, removing the closing process of the overshot, increasing molded parts created per cycle, and reducing overhead costs such as, and not limited to, utilities.  
         [0052]     The molding of the two shot dispenser  20  also creates a “mold to fit orifice”. The “mold to fit orifice” is created when overshot  30  is molded in the second step of the molding process. In the “molded closed” position, overshot  30  is mildly bonded to undershot  40  during molding. The bond occurs during the second step of the molding process, wherein the female unitary mold is abutted up to the undershot portion of the dispenser. While the female unitary mold is abutted up undershot  40 , the plastic material is injected creating the overshot  30 . Because there is no metal mold cavity to metal mold cavity contact, overshot  30  is mildly bonded directly to the surface of undershot  40 . This mild bond creates a substantially tight and engaging seal on a substantial portion of the surface area of contact between overshot  30  and undershot  40 . The molded bond surface incorporates, but is not limited to, the planar surface surrounding aperture  48  of undershot  40  and undershot aperture  48  itself is also substantially sealed by depending skirt  33  creating a seal capable of being sealed directly upon molding. The molded seal or “mold to fit orifice” removes the need to add further sealing mechanisms known in the art because the seal created by overshot  30  directly matches the surface contours or imperfections of undershot  40 . During each individualized second step of the mold process, each individual overshot  30  part is directly molded to a corresponding undershot  40  part, thus creating a bond that identically matches and is specific to the surface contours between the overshot and undershot. The seal created by the molded bond between overshot  30  and undershot  40  substantially minimizes leaks and makes the seal capable of withstanding carbonation or pressure from contents enclosed in container. The molded seal is immediately created upon completion of the molding of the two shot dispenser  20  which makes the seal of the dispenser ready to be used from the moment of creation without additional steps of manufacture.  
         [0053]     There are numerous tamper indicating devices which can be used individually or in combination with each other in support of two shot dispenser  20 . There is a visual indicator created because of the mild bond of the seal between overshot  30  and undershot  40 . The mild bond creates a color differentiation between an overshot that has been opened to an open configuration ( FIG. 14 ) versus an overshot that has been in a closed configuration ( FIG. 9 ) since being “closed molded”. Once the overshot is first opened the color between flip-top cap  30   a  and spout portion  46  is no longer substantially identical to the mild bond color when dispenser  20  was first created during the “closed molded” process. As shown in  FIG. 15 , a dust cover  80  may also be used in conjunction with two shot dispenser  20  to indicate tampering of the dispenser. Dust cover  80  acts as an over cap  82  with a tamper evident ring  84  and minimize contaminants from coming into contact with the two shot dispenser  20 . Tamper evident ring  84  may mechanically remain affixed to the two shot dispenser once over cap  82  is mechanically rotated and removed to indicate tampering or a taper evident tab (not shown) may be torn off separately from the over cap before removal of the over cap. Another indicator for tampering may be removable panel  34  created during the second step of the overshot creation process. Removable panel  34  may encompass and wrap around a substantial front portion of spout portion  46  of undershot  40 . Removable panel  34  comprises of an upper and lower tear away web  35 ,  36  as shown in  FIG. 13 . The upper and lower tear away web  35 ,  36  may not extend to the terminating ends of the removable panel allowing for the user to push or pull upon tabs  37 ,  38  for removal. Tabs  37 ,  38  aids in the user to start and/or remove removable panel  34 . Tabs  37 ,  38  may be located on either end of the removable panel. Typically the tear away breakable web  35 ,  36  may be created by a score line or molded as a thin section of plastic material. Removable panel  34  also may have the visual color indicator created by the mold bond between overshot  30  and undershot  40  as described above. As shown in  FIG. 16 , a shrink wrap  90  may be used to also indicate tampering of two shot dispenser  20 . Shrink wrap  90  should encompass a substantial amount of two shot dispenser  20 . Shrink wrap  90  may be made of a plastic that wraps tightly around the two shot dispenser. Shrink wrap may be removed by a user at a point of weakness or by a perforation  92  in the plastic or by any other means known in the art. As described above and shown in  FIGS. 9-12 , undershot  40  may also have tamper indicating ring  70  depending from outer wall  42  and affixed to the container neck  12 . If undershot  40  were to be mechanically removed by rotating off the closure from the container the tamper indicating ring would separate from the undershot and remain upon the container neck indicating tampering. A score line creating the tamper indicating ring  70  may be scored by a subsequent cutter operation or molded to define the tear away score line. It is to be understood that any tampering indicator known in the art may be used and still be within the scope of the present invention.  
         [0054]     Another embodiment of overshot  30 , illustrated as reference  130  of a two shot dispenser  120  as illustrated in  FIGS. 17-21 , allows for another hinge mechanism to be used to allow for the opening and closing of the dispenser. The hinge mechanism of two shot dispenser  120  allows for the dispenser to be recloseable and tightly sealed. The hinge mechanism separates a flip-top cap  130   a  from a flip-top base  130   b  of overshot  130 . Flip-top cap  130   a  can travel from an open configuration ( FIG. 21 ) to a closed configuration ( FIG. 17 ). In the open configuration contents (not shown) can be dispensed. As illustrated in  FIGS. 17-21 , the hinge mechanism of overshot  130  of two shot dispenser  120  comprises of an opening  150  defining the hinge. The opening is, but is not limited to, a substantially elliptical shaped opening. Opening  150  can also have taper extending around or portions of the perimeter of the opening. The taper assists in allowing the hinge mechanism to keep the flip-top cap substantially open. Opening  150  divide the hinge mechanism into a left hinge arm  131  and a right hinge arm  132 . The hinge mechanism of two shot dispenser  120  allows flip-top cap  130   a  to travel to an open configuration ( FIG. 21 ) wherein the cap is substantially open to allow dispensing of a variety of contents known in the art. Interference by flip-top cap  130   a  in dispensing is minimized due to the maximization of the hinge mechanism to open the cap to a sufficient degree of clearance. The hinged flip-top cap  130   a  may flex below 90 degrees when in the open configuration. A user may drink from the dispenser without substantial interference from flip-top cap  130   a.    
         [0055]     It is understood that while certain embodiments of the invention have been illustrated and described, it is not limited thereto except insofar as such limitations are included in the following claims and allowable functional equivalents thereof.