Patent Publication Number: US-9415321-B2

Title: Self-sealing balloon or bladder

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of and priority under 35 U.S.C. 119(e) of U.S. Provisional Patent Application No. 61/729,293,entitled SELF-SEALING BALLOON OR BLADDER, filed Nov. 21, 2012 in the names of Jerome Harris, Maureen McHale and Suzanne Mills-Winkler, the disclosure of which is incorporated herein by reference. 
    
    
     FIELD OF THE INVENTION 
     This invention relates generally to flexible fluid-filled balloons and bladders filled with fluids and/or other flowable material, such as powder, or the like, and particularly to the sealing mechanism utilized therein. 
     BACKGROUND OF THE INVENTION 
     Balloons have proven to be an extremely pervasive and popular amusement device having been utilized by countless generations of children and adults. While balloons vary substantially in shape and size, all generally provide a fluid impervious continuous skin often formed to define a desired shape. The skin includes an extending usually tubular neck portion. The function of the neck portion is to provide for the introduction of a fluid under pressure to fill the interior of the balloon&#39;s skin. The balloon skin and neck are typically formed of a flexible resilient continuous structure available in a countless variety of colors and appearances. Most balloons utilize a skin and neck integrally formed of a resilient material such as rubber, latex or flexible resilient plastic materials. The essential characteristic of the balloon skin and neck material is to provide a skin which is largely impervious to the fluid to be introduced into the balloon. Additionally, balloons may be formed of various polymer materials such as mylar or the like to provide a somewhat different structure. In most such balloons, the material utilized is in thin sheet form and is typically flexible but not capable of extensive stretching. In a common construction found to be economically suitable, a pair of substantially mirror-image sheets of this material is joined along the outer edges thereof to provide a fluid confining volume. 
     In generally related technologies, fluid bladders generally resemble resilient stretchable rubber or latex-type balloons but find their use in more commercially oriented environments. Thus, such resilient fluid bladders are often used within a confining enclosure or container to provide a sealed volume of fluid. In this type of application, the confining enclosure or container may be a shipping container or, alternatively, may be a relatively unstretchable sports article such as a football, basketball or soccer ball. The essential function provided in such bladders is similar to the function desired in balloons which is simply to provide a reliable sealed container for the fluid therein. 
     The typical resilient stretchable balloon which is generally most pervasive in the party and amusement applications is formed of a rubber or latex material which enjoys extensive popularity due in part to its easy inexpensive manufacture as well as its ability to provide a virtually endless variety of colors. For the most part, such balloons are formed over a mandrel or plug which is dipped into the liquid rubber or latex material to provide a thin film upon the mandrel or plug afterwhich cooling in a liquid such as water fixes the material. The completed balloon is then simply rolled from the mandrel or plug. 
     In the most pervasive and well know play patterns for balloons, air is introduced through the balloon neck under pressure to provide a confined volume of air within the balloon skin. As the pressure within the skin is increased, the resilient stretchable characteristic of the skin allows the balloon to expand or be “blown-up”. Once the desired extent of inflation of the balloon has been accomplished, the user typically seals the fluid within the balloon by simply tying a knot in the balloon neck. Balloons may be inflated with pump apparatus or simply blown-up by placing the balloon neck end into the user&#39;s mouth and blowing into the balloon. The resulting air-filled balloon is close to neutral in its buoyancy within the air allowing it to float to some degree within the air and have a general characteristic to descend when not touched by the user. 
     In other play patterns utilizing such stretchable flexible balloons, an alternative gas such as helium or the like selected for its lighter weight relative to air is used to inflate the balloon. The inflation process is the same as pressurized gas such as helium is introduced through the balloon neck causing the confined volume of gas within the balloon to stretch and expand the balloon. Once again, the seal of the gas within the inflated balloon is typically carried forward by simply tying off the balloon neck. The resulting play article is substantially buoyant in the air due to the lighter weight of the confined gas within the balloon. Thus, such lighter than air gas-filled balloons float and will rise unless restrained by a tether or the like. 
     In still play patterns, balloons are filled with a heavier liquid type fluid such as water. Water filling a typically stretchable resilient balloon provides a volume of water confined within the balloon skin which due to its weight and a slight fluid pressure will expand the balloon&#39;s skin to enlarge the balloon somewhat. Typically, water-filled balloons are not expanded to the size increase which characterizes balloons filled with air, helium or other gases. Once again, the fluid seal is attained by simply tying off the filler neck of the balloon. Filling a typical resilient stretchable balloon with a fluid such as water provides a flexible heavy amusement device which has proven enjoyable to manipulate and use in play patterns. Because the typical balloon filled with water will burst when impacted, the play patterns which involve launching or throwing balloons at or toward a target object causing them to burst on impact have proven to be an amusing and often mischievous play pattern. 
     Despite the extensive popularity and proliferation of balloons as amusement devices, a vexing problem has persisted in sealing the fluid within the filled balloon. While practitioners in the art have attempted to solve this problem with various valves, fluid traps and the like, the resulting apparatus has been largely unsuccessful due the increase in costs and increase in balloon weight which they produce. Thus, while simply tying the filler neck of a balloon is not a perfect solution for sealing the fluid therein due to the often difficult and tedious process in tying a suitable knot and attaining a suitable seal, it remains the best alternative to date. 
     The need to improve balloon sealing has prompted practitioners in the art to try a variety of devices. For example, U.S. Pat. No. 4,917,646 issued to Kieves sets forth a SELF-SEALING VALVE, A SELF-SEALING, NON-LATEX BALLOON, AND METHOD FOR PRODUCING SUCH A BALLOON sets forth a sealing apparatus for use in a balloon having an elongated filler neck and a reservoir body within which a valve fabricated from a pair of flexible plastic sheets bonded together is situated within the filler neck. The valve sheets separate during filling and are pressed closed by internal pressure to affect balloon seal. 
     U.S. Pat. No. 5,248,275 issued to McGrath, et al. sets forth a BALLOON WITH FLAT FILM VALVE AND METHOD OF MANUFACTURE having a balloon defining a reservoir and a filler neck. A pair of flat flexible valve elements are supported within the balloon interior proximate the junction of the filler neck and balloon reservoir. During filling the filling pressure separates the flat valve elements while, once filled, a seal is created by the flat plates being driven together. 
     U.S. Pat. No. 5,188,558 issued to Barton, et al. sets forth a SELF-SEALING REFILLABLE PLASTIC BALLOON VALVE utilizing a pair of plastic film sheets supported within the valve filler neck and are bonded thereto. 
     U.S. Pat. No. 8,349,417 issued to Hefferman sets forth a SELF-SEALING INFLATABLE ARTICLE having an inflatable body portion and filling neck connected thereto. A ring member supporting the opening of the filler neck and a plug member for sealing the opening cooperate to provide balloon sealing. 
     U.S. Pat. No. 6,736,793 issued to Meyer, et al. sets forth a SELF-SEALING DETACHABLE BALLOON having an inflatable balloon body supporting a self-sealing valve. The balloon is formed of an elastomeric membrane having a fill opening. The self-sealing valve is made up of a valve body for receiving an inflation instrument to inflate the balloon. Once the inflation instrument is withdrawn, the valve closed to complete sealing of the balloon. 
     U.S. Pat. No. 7,922,116 issued to Nguyen, et al. sets forth a DEVICE AND METHOD FOR SEALING AND LIGHTING A BALLOON utilizing a balloon having a fillable reservoir and filler neck. A combination valve and battery-powered light source is inserted into the balloon neck to provide sealing and illumination of the balloon interior. 
     U.S. Pat. No. 5,295,892 issued to Felton sets forth a BALLOON HAVING SELF SEALING VALVE AND METHOD OF MAKING SAME providing a fillable elastic balloon reservoir and fill neck coupled thereto. The neck supports a valve utilized in allowing pressurized fluid to pass through the valve into the interior and providing valve closure once the fill instrument has been withdrawn. 
     U.S. Pat. No. 6,015,472 issued to Garcia sets forth METHOD OF PRODUCING A BALLOON WITH SELF-SEALING VALVE while U.S. Pat. No. 5,378,299 issued to McGrath, et al. sets forth a METHOD OF MAKING A BALLOON WITH FLAT FILM VALVE, both of which provide methods and apparatus for fabricating self-sealing balloons. 
     While the foregoing described prior art devices have to some extent advanced the balloon art and in some instances endeavored to achieve commercial success, there remains nonetheless a continuing need in the art for an improved seal method and apparatus which readily and reliably seals a fluid-filled balloon without substantially increasing the weight or without an intricate complex operation. 
     SUMMARY OF THE INVENTION 
     The present invention provides a self-sealing balloon or bladder apparatus utilizing a resilient stretchable material balloon having a closed skin fluid reservoir coupled to an extending filler neck. In accordance with the invention, the filler neck of the balloon is folded back upon the body of the balloon skin and secured to the underlying portion of the balloon skin to fix the filler neck against the underlying balloon body surface. The fixing of the filler neck against the balloon body surface may be provided using a suitable adhesive material, a double-sided tape or other fixing methods and apparatus. The resulting balloon structure or bladder provides a suitable structure for quickly filling or inflating the balloon and sealing the confined fluid within the balloon interior. The closure of the balloon is provided by the captivation and attachment of the filler neck upon the outer surface of the balloon body. A reliable seal is provided once the fluid has been introduced under pressure by the action of the confined fluid volume of within the balloon exerted against the balloon skin and restrained neck secured to the balloon body. The self-sealing balloon or bladder readily accommodates an automated system of filling balloons and may further accommodate and automated system which dispenses individual balloons in a cartridge or clip form to create multiple-filled balloons in a short period of time. 
     In accordance with the present invention, there is provided a self-sealing balloon comprising: a balloon, formed of an elastic material, having an expandable body defining an interior and an outer skin surface and a filler neck integrally formed with and extending from the expandable body having a fill passage in communication with the interior; a portion of the neck folded upon and against the outer skin surface; and an attachment interposed between the portion of the neck and the outer skin surface securing the portion of the neck to the outer skin surface, the expandable body expanding as a flowable material is introduced through the filler neck and forcing closure of the fill passage once the introduction of flowable material ceases. 
     In certain embodiments, the present invention provides a self-sealing balloon comprising: an inflatable balloon body defining an interior cavity and surrounding skin; a filler neck, joined to the balloon body, having a fill passage in communication with the interior, the filler neck having at least a portion thereof folded upon the surrounding skin; and attachment means interposed between the filler neck and the skin to secure the at least a portion to the surrounding skin. 
     In a more general sense, the present invention provides a self-sealing flowable material vessel comprising: a body having a skin surrounding an interior cavity and a fill aperture; a filler neck defining a fill passage joined to the skin at the fill opening, the filler neck being folded upon a portion of the skin; and an attachment interposed between the filler neck and the skin to secure the filler neck to the skin. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The features of the present invention, which are believed to be novel, are set forth with particularity in the appended claims. The invention, together with further objects and advantages thereof, may best be understood by reference to the following description taken in conjunction with the accompanying drawings, in the several figures of which like reference numerals identify like elements and in which: 
         FIG. 1  sets forth a perspective view of a self-sealing balloon constructed in accordance with the present invention in an inflated condition; 
         FIG. 2  sets forth a side elevation view of a conventional balloon in a deflated state; 
         FIG. 3  sets forth the deflated balloon of  FIG. 2  having been modified with the present invention improvement; 
         FIG. 4  sets forth the present invention balloon in a deflated state; 
         FIG. 5  sets forth a section view of the present invention self-sealing balloon taken along section lines  5 - 5  in  FIG. 1  showing the balloon in a generally deflated state; 
         FIG. 6  sets forth the section view of the present invention self-sealing balloon shown in  FIG. 5  depicting the balloon in an inflated state; 
         FIG. 7  sets forth a section view of an alternate embodiment of the present invention self-sealing balloon in a generally deflated state; 
         FIG. 8  sets forth a section view of the alternate embodiment of the present invention self-sealing balloon shown in  FIG. 7  in an inflated condition; 
         FIG. 9  sets forth a perspective view of an alternate embodiment of a self-sealing balloon constructed in accordance with the present invention in a deflated condition; 
         FIG. 10  sets forth a perspective view of the alternate embodiment of a self-sealing balloon set forth in  FIG. 9  in a deflated condition and having an inflation nozzle inserted therein; 
         FIG. 11  sets forth a perspective view of the alternate embodiment of a self-sealing balloon set forth in  FIG. 9  in a deflated condition and having an inflation nozzle fully inserted therein; 
         FIG. 12  sets forth a section view of the valve used in the alternate embodiment of the present invention self-sealing balloon shown in  FIG. 9 ; 
         FIG. 13  sets forth a perspective view of a further alternate embodiment of a self-sealing balloon constructed in accordance with the present invention in a deflated condition; 
         FIG. 14  sets forth a perspective view of the further alternate embodiment of a self-sealing balloon shown in  FIG. 13  having the neck folded and attached; 
         FIG. 15  sets forth a partial section view of the further alternate embodiment of a self-sealing balloon shown in  FIG. 13  having the neck folded and further showing the flapper valve; 
         FIG. 16  sets forth a partial section view of the further alternate embodiment of a self-sealing balloon; 
         FIG. 17  sets forth a perspective view of an alternate embodiment of a self-sealing balloon constructed in accordance with the present invention supporting a neck retaining ring; and 
         FIG. 18  sets forth a neck retaining ring constructed in accordance with the present invention. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     By way of overview, the present invention self-sealing balloon or bladder is obtained by providing a low cost, relatively easy modification of an otherwise conventional balloon or bladder. Such conventional balloons are formed of a unitary structure having a body enclosing an empty volume and a filler neck extending from the body. The neck defines a filler passage extending into the body interior volume. In most balloons, the outer end of the filler neck is rolled to form a neck rim or bead. The neck rim facilitates automated filling apparatus. Thus, a typical balloon formed of a stretchable resilient material such as rubber, latex or plastic is adapted to provide a self-sealing balloon by folding the filler neck of the balloon against the adjacent skin portion of the balloon and securing the filler neck thereto by a suitable attachment. The anticipated attachment utilized between the filler neck and the balloon skin may be provided through the use of adhesive, tape or other attachment apparatus such as sonic or thermal welding. Once the filler neck has been confined against the balloon skin, the introduction of fluid under pressure through the neck into the interior of the balloon causes the balloon body to expand. The pressure of the introduced fluid together with the elasticity of the balloon body cooperates to exert a force against the skin portion of the balloon surrounding the balloon neck as well as the neck itself. The continued introduction of fluid under pressure increases the force applied to the balloon skin against the confined balloon neck. This provides a reliable seal of the neck opening once the inflating apparatus is removed. It will be understood that the present invention contemplates filling a balloon, or bladder, with a substance that may be pumped or otherwise caused to flow into a balloon or bladder. Thus, the fill substance may be virtually any flowable material including, but not limited to, a gas, liquid, gel, powder or particulate material. Accordingly, in the descriptions and claims set forth herein, the terms “fluid” and “flowable material” may be used interchangeably and are not for exclusion. 
     More specifically,  FIG. 1  sets forth a perspective view of a self-sealing balloon constructed in accordance with the present invention and generally referenced by numeral  10 . It should be noted that the figures and descriptions which follow set forth the present invention in embodiments which comprise self-sealing balloons. It will be understood, however, that the descriptions and the operation of the present invention which follow for the self-sealing balloon embodiments are equally applicable to and bear equal importance with respect to flexible fluid-confining bladders of various types. 
     Returning to  FIG. 1 , balloon  10  includes a resilient stretchable skin  11  formed to confine an interior volume (seen in  FIGS. 5 and 6 ). Skin  11  is coupled to a filler neck  12  which is preferably continuously formed with skin  11 . Filler neck  12  defines a neck aperture  14  surrounded by a neck rim  13 . While not seen in  FIG. 1 , it will be apparent to those skilled in the art that filler neck  12  is hollow and generally cylindrical and thus includes a filler passage extending therethrough. Neck  12  and neck rim  13  provide a means for holding balloon  10  and for introducing fluid under pressure into the interior of skin  11 . In accordance with the present invention, a quantity of adhesive  20  is deposited upon skin  11  in proximity to filler neck  12 . In further accordance with the present invention, filler neck  12  has been folded upon skin  11  in the manner shown in  FIG. 1  and as is better seen below in  FIGS. 5 and 6 . Of importance with respect to the present invention is the attachment and restriction of movement exerted against filler neck  12  by adhesive deposit  20 . It will be noted that while a deposit of adhesive material is suitable for fixing filler neck  12  against skin  11 , other fixing and attachment apparatus such as double-sided tape or processes such as sonic or chemical welding may be utilized without departing from the spirit and scope of the present invention. Thus, in  FIG. 1  and the descriptions which follow, adhesive  20  serves to be merely illustrative of a variety of suitable attachment apparatus which may be used to secure filler neck  12  against skin  11  of balloon  10 . It will be further noted that the embodiment of the present invention set forth in  FIG. 1  (balloon  10 ) shows adhesive  20  ending upon filler neck  12  to define a gap  18  between rim  13  and adhesive  20 . Gap  18  facilitates the grip of neck  12  required by automatic filling apparatus. 
     In accordance with the present invention once balloon  10  has been inflated to define a closed fluid volume such as the generally spherical balloon shown in  FIG. 1 , the inflated balloon by means described below in greater detail utilizes the interior pressure within the balloon skin together with elasticity thereof to exert a force against the restrained condition of filler neck  12  to accomplish a seal which maintains the integrity of balloon  10  and which confines the pressurized fluid therein. It will be noted that while the preferred fabrication of the present invention utilizes an elastic and stretchable balloon, a bladder, or the like, formed of more or less non-stretchable material may be used. 
     It should also be noted in conjunction with  FIG. 1  that the filled condition of balloon  10  and the sealing function applied to filler neck  12  allow balloon  10  to be used in accordance with the various conventional balloon play patterns. It will be further noted that while it is anticipated that the embodiment of the invention shown in  FIG. 1  utilizes a generally spherical balloon having a quantity of a gas fluid therein, the embodiment of  FIG. 1  applies equally well to other shaped balloons and to balloons filled with a liquid material such as water or other flowable material, such as powder. 
       FIGS. 2, 3 and 4  set forth sequential views illustrating the adaptation of balloon  10  to provide the present invention self-sealing balloon. In  FIG. 2 , balloon  10  is shown in its initial conventional fabrication. In  FIG. 3 , balloon  10  is shown in a relaxed or deflated condition having a quantity of adhesive deposited upon the balloon skin. Finally, in  FIG. 4 , balloon  10  is shown in completed fabrication with neck  12  secured to balloon skin  11  while still in a generally deflated condition. 
     More specifically,  FIG. 1  sets forth a conventional balloon  10  which has yet to be configured to provide the present invention self-sealing balloon. Thus, balloon  10  is shown having a relaxed generally spherical skin  11  joined to an extending generally cylindrical neck  12 . For purposes of illustration, neck  12  is shown partially sectioned to expose interior neck passage  17 . Neck  12  terminates in an annular rim  13  which encircles the entrance to neck filler passage  17 . The fabrication of the present invention self-sealing balloon is initiated by flexing and folding neck  12  upwardly in the direction indicated by arrow  25 . 
       FIG. 3  sets forth a side elevation view of balloon  10  at the next step of fabrication to provide the present invention structure. Thus, as described above, balloon  10  includes a generally bulbous skin  11  having an elongated generally cylindrical filler neck  12  supporting a rim  13 . In accordance with the present invention, a deposit of adhesive material  20  is now placed upon a selected portion of balloon skin  11 . The position of adhesive  20  is selected to provide attachment between filler neck  12  and the underlying portion of balloon skin  11 . Thus, as neck  12  is further folded upon balloon skin  11  in the direction indicated by arrow  26 , filler neck  12  is moved into alignment with adhesive material  20 . 
       FIG. 4  sets forth balloon  10  at the completion of fabrication while remaining in a generally relaxed deflated configuration. As described above, balloon  10  includes a resilient generally bulbous skin  11  having a generally cylindrically filler neck  12  extending therefrom. Filler neck  12  includes a bead  13  surrounding a filler aperture  17 . In accordance with the present invention, filler neck  12  is folded upon bulbous skin  11  and secured thereto by an adhesive deposit  20 . As mentioned above, gap  18  formed between rim  13  and adhesive  20  allows filler neck  12  to be gripped by automated filling apparatus. It will be noted that the position in which filler neck  12  is secured against the underlying portion of balloon skin  11  restricts or confines filler neck  12  from further movement. It will be apparent to those skilled in the art that the fabrication of the present invention self-sealing balloon which utilizes an otherwise conventional inflatable balloon may be carried forward with a minimum of expense and labor. In this manner, very little significant weight is added to balloon  10  by virtue of the use of adhesive deposit  20 . The resulting balloon once inflated is suitable for the anticipated methods of balloon play to be enjoyed by the user. 
       FIG. 5  sets forth a section view of balloon  10  taken along section lines  5 - 5  in  FIG. 1 . As described above, balloon  10  includes a generally bulbous skin  11  supporting an extending filler neck  12 . As is also described above, filler neck  12  includes a bead  13  and an internal neck passage  17 . Neck passage  17  extends into interior  16  of balloon skin  11 . In accordance with the present invention, an adhesive material deposit  20  is received upon balloon skin  11  and secures a portion of filler neck  12  against the underlying surface of balloon skin  11 . Of particular importance with respect to the present invention is found is an area indicated by dashed-line  21  in which the portion of filler neck  12  which joins balloon skin  11  is folded over. 
     In operation, a quantity of flowable material such as a fluid under pressure which may be air or other gas or a liquid such as water is introduced into filler neck  12  in the direction indicated by arrow  45 . It should also be noted that other flowable material such as a powder may be used to fill the balloon or bladder. The pressure of introduced fluid produces a fluid flow through neck passage  17  into interior  16  of balloon skin  11 . The confined position of filler neck  12  forms fold portion  41  within interior  16 . As the fluid introduced into interior  16  under pressure continues to flow, a confined volume of fluid under pressure within interior  16  is formed. This confined pressurized fluid volume provides a force exerted outwardly and generally uniformly within interior  16  against skin  11  as indicated by arrows  30  through  36 . Of importance with respect to the present invention, the outward pressure upon skin  11  and neck  12  near fold  41  collapses fold  41  forcing the portion of skin  11  and neck  12  adjacent thereto outwardly in the manner indicated by arrow  40 . This outward force further collapses the portion of skin  11  adjacent fold  41  against the proximate portion of filler neck  12 . As fluid under pressure continues to be injected through neck  12 , the pressure within interior  16  continues to increase stretching skin  11  and causing skin  11  to form balloon  10  into the generally inflated condition shown in  FIG. 6 . 
       FIG. 6  shows the section view of balloon  10  taken along section lines  5 - 5  in  FIG. 1  once balloon  10  has been suitably inflated. In the example shown in  FIG. 6 , it is assumed that the fluid introduced into interior  16  of balloon  10  is a gas resulting in a generally spherical-shaped balloon. It will be recognized that the introduction of a liquid or powder while behaving generally the same as a gas in sealing the neck opening likely would not produce the spherical shape shown in  FIG. 6  but rather generally conform to a shape corresponding more to the shape shown in  FIG. 5 . 
     In the inflated condition of  FIG. 6 , balloon  10  assumes a generally spherical shape such that skin  11  defines a sphere and the confined gas within interior  16  of balloon  10  produces a generally uniform outwardly directed force indicated by arrows  30  through  36 . Of importance with respect to the present invention, the confinement of neck  12  against the underlying portion of skin  11  provided by adhesive  20  secures neck  12  such that fold  41  shown within dashed line area  21  assumes a flattened configuration. The outward force shown by arrow  30  operates upon fold  41  forcing the adjacent skin and neck portion into a flattened sealed configuration. This outward force is further active upon the remaining portions of skin  11  and, most importantly, the adjacent portions of neck  12 . This force in turn collapses neck passage  17  (seen in  FIG. 5 ) providing further closure of neck  12  and further sealing of interior  16  of balloon  10 . 
     Thus, it will be apparent by examination of  FIG. 6  that the uniform outwardly directed pressure of confined fluid within volume  16  forces skin  11  outwardly and maintains the seal and closure of neck  12 . In the absence of the confinement and restraint of neck  12  provided by adhesive  20 , the pressurized fluid within interior  16  would simply be expelled through neck passage  17 . It will also be apparent by examination of  FIG. 6  that the resulting inflated object provided by balloon  10  is a substantially more desirable play and amusement object due to the generally spherical character provided as neck  12  is restrained against the surface of skin  11 . This is in substantial contrast to the article provided when a conventional balloon is inflated and the neck is simply tied to provide a seal. 
       FIG. 7  sets forth a section view of an alternate embodiment of the present invention self sealing balloon generally referenced by numeral  50 . Balloon  50  is substantially similar to balloon  10  described above with the difference being found in a shorter neck balloon. Thus,  FIG. 7  shows balloon  50  in a relaxed deflated state. In accordance with the present invention, balloon  50  includes a bulbous skin  51  defining an interior  56  an a filler neck  52 . Neck  52  includes a bead  53  and is folded at a fold  60 . The remainder of neck  52  is secured to skin  51  by an adhesive  61 . 
       FIG. 8  shows balloon  50  following inflation to form a generally spherical shape. Balloon  50  includes an interior  56 , a neck  52  and a bead  53 . Neck  52  remains secured to skin  51  by adhesive  61 . In accordance with the invention, fold  60  is compressed by the pressure of the inflating fluid within interior  56  to provide a seal for balloon  50 . 
     While the above-described embodiments have proven to provide effective balloon seal, it may in some instances, such as heavier bladders, be advantageous to provide supplement sealing apparatus. Accordingly,  FIG. 9  shows a perspective view of a further alternate embodiment of the present invention balloon generally referenced by numeral  70 . Balloon  70  is fabricated in accordance with conventional techniques and includes a resilient skin  71  formed to an elongated neck  72  which, in turn, terminates in an open mouth  73 . A flapper valve  74  is supported within mouth  73  and, as is better seen in  FIG. 12 , includes a pair of over-lapping valve flaps  76  and  77 . Valve  74  may be used in combination with the above-described attached neck sealing system or used alone. 
       FIG. 10  sets forth a perspective view of balloon  70  having skin  71 , neck  72  and mouth  73 . Also shown is valve  74 . To fill or inflate balloon  70 , a nozzle  75  is shown partially inserted into valve  74 . It will be noted that flaps  76  and  77  part to receive nozzle  75 . 
       FIG. 11  again sets forth the perspective view of balloon  70  having skin  71 , neck  72  and mouth  73 . Also shown is valve  74 . To fill or inflate balloon  70 , nozzle  75  is shown fully inserted into valve  74 . It will be noted that flaps  76  and  77  part to receive nozzle  75  and form a seal around nozzle  75 . Thus, gas or liquid, under pressure may fill or inflate the balloon. Once the desired filling or inflation is complete, nozzle  75  is withdrawn and valve  74  closes. 
       FIG. 12  sets forth a partial section view of valve  74  and neck  72 . As can be seen, valve  74  includes a pair of partially over-lapping valve flaps  76  and  77 . In the closed configuration shown in  FIG. 12 , valve flaps  76  and  77  are forced together by the pressure within the balloon. 
       FIG. 13  sets forth a perspective view of a still further alternate embodiment of the present invention self sealing balloon generally referenced by numeral  80 . Balloon  80  differs from balloon  10  described above with the addition of a further sealing valve  84 . Thus, balloon  80  includes a skin  81  and neck  82  which, in turn, forms a mouth  83 . 
       FIG. 14  shows balloon  80  having neck  82  folded upon skin  81  and secured by an attachment  86  in a similar manner to that shown for balloon  10  shown and described above in  FIGS. 1 through 6 . Additionally, valve flap  84  provides further sealing of balloon  80 . 
       FIGS. 15 and 16  set forth partial section views of the operation of valve  84 . In  FIG. 15 , balloon  80  is shown deflated while in  FIG. 16  balloon  80  is shown inflated 
       FIG. 17  shows balloon  10  further including a neck retainer  80  which supplements the fixing of neck  12  against skin  11 . Thus, as described above, balloon  10  includes a resilient stretchable skin  11  formed to confine an interior volume). Skin  11  is coupled to a filler neck  12  which is preferably continuously formed with skin  11 . Filler neck  12  defines a neck aperture  14  surrounded by a neck rim  13 . As is also mentioned above, filler neck  12  is hollow and generally cylindrical and thus includes a filler passage extending therethrough. Neck  12  and neck rim  13  provide a means for holding balloon  10  and for introducing fluid under pressure into the interior of skin  11 . In accordance with the present invention, a quantity of adhesive  20  is deposited upon skin  11  in proximity to filler neck  12 . In further accordance with the present invention, filler neck  12  has been folded upon skin  11  in the manner shown above in  FIG. 1  and as is better seen above in  FIGS. 5 and 6 . Of importance with respect to the present invention is the attachment and restriction of movement exerted against filler neck  12  by adhesive deposit  20 . It will be noted that while a deposit of adhesive material is suitable for fixing filler neck  12  against skin  11 , other fixing and attachment apparatus such as double-sided tape or processes such as sonic or chemical welding may be utilized without departing from the spirit and scope of the present invention.  FIG. 17  also shows adhesive  20  ending upon filler neck  12  to define a gap  18  between rim  13  and adhesive  20 . Gap  18  facilitates the grip of neck  12  required by automatic filling apparatus and also facilitates attachment of neck  12  to neck retainer  80 . Neck retainer  80  further secures neck  12  and is particularly advantageous for use with heavier fluids and the like. 
     Neck retainer  80  is preferably formed of a molded plastic or other somewhat rigid material. As is best seen in  FIG. 18 , neck retainer  80  defines a larger band  81  having a larger aperture  82  formed therein and a smaller band  83  having a smaller diameter aperture  84  formed therein. Neck retainer  80  is secured to balloon  10  by passing large band  81  onto skin  11  of the balloon. Thereafter, rim  13  of neck  12  is passed through smaller aperture  84  to provide the assembly shown in  FIG. 17 . When thus installed, neck retainer  80  provides an additional attachment for neck  12  supplementing the attachment provided by attachment  20 . 
       FIG. 18  sets forth neck retainer  80  which defines a larger band  81  having a larger aperture  82  formed therein and a smaller band  83  having a smaller diameter aperture  84  formed therein. 
     It will be apparent to those skilled in the art that the present invention self-sealing balloon or bladder provides considerable advantage in conventional gas-filled balloons of the type typically played with by children as well as sturdier and heavier structures such as the bladders often employed within the interior of various sport balls as well as a variety of industrial apparatus. Thus, when applied to an amusement device such as a lightweight thin balloon filled with air or lighter than air gas to provide buoyancy, the minimum structure required by the present invention system to produce a reliable self-sealing performance does not interfere with the conventional types of amusement play carried forward with such devices. Particularly in connection with lighter than air gasses filling the balloon to provide buoyancy within the air, the minimum weight added by the present invention system enjoys particular advantage. In addition, the ease of fabrication which may be carried forward with virtually any otherwise conventional balloon or similar inflatable device facilitates virtually endless variety of play and amusement devices. With respect to applications of the present invention self-sealing balloon or bladder to sturdier heavier weight bladder-type apparatus, the economy and ease of fabrication enjoy corresponding benefits and appeal. The cost of the present invention self-sealing system is substantially reduced from the cost of other, more conventional valves and valve systems. 
     It has been noted above that the present invention is, for the most part, described in the embodiments set forth herein illustrating the use of the present invention system in filling a balloon or bladder with a fluid such as a liquid or gas. However, as mentioned above, it will be understood that the present invention system is not limited to a fluid such as liquid or gas material. The present invention system is equally applicable to virtually any “flowable” material. As used herein, the term flowable embraces virtually any material which is not defined in a retained shape but rather assumes the shape of its surroundings. Thus, particulate materials not normally thought of in filling bladders and balloons such as fine powder, coarse powder, sand or even granular material may benefit from the present invention. It has been found that such flowable materials may be introduced into the balloon or bladder interior causing a stretching of the elastic material from which the balloon or bladder is formed. In such event, the elastic characteristic of the balloon or bladder body cooperates with the flowable material to provide a closure force operative upon the balloon or bladder neck in virtually the same manner as depicted above in  FIGS. 5 and 6 . Accordingly, as used herein, the term “flowable material” will be understood to embrace and include fluids such as gas or liquid as well as other materials such as powder, sand or granular materials without departing from the spirit and scope of the present invention. 
     What has been shown is a self-sealing balloon or bladder apparatus utilizing a resilient stretchable material balloon having a closed skin fluid reservoir coupled to an extending filler neck. In accordance with the invention, the filler neck of the balloon is folded back upon the body of the balloon skin and secured to the underlying portion of the balloon skin to fix the filler neck against the underlying balloon body surface. The fixing of the filler neck against the balloon body surface may be provided using a suitable adhesive material, a double-sided tape or other fixing methods and apparatus. The resulting balloon structure or bladder provides a suitable structure for quickly filling or inflating the balloon and sealing the confined fluid within the balloon interior. The closure of the balloon is provided by the captivation and attachment of the filler neck upon the outer surface of the balloon body. A reliable seal is provided once the fluid has been introduced under pressure by the action of the confined fluid volume of within the balloon exerted against the balloon skin and restrained neck secured to the balloon body. The self-sealing balloon or bladder readily accommodates an automated system of filling balloons and may further accommodate and automated system which dispenses individual balloons in a cartridge or clip form to create multiple-filled balloons in a short period of time. 
     While particular embodiments of the invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects. Therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of the invention.