Abstract:
A baseball cap designed to be collapsible in order to be compact enough to conveniently fit in a shirt pocket or a pair of pants. A retractable element of the membrane in the frame of the cap allows the cap to return to its recognizable baseball shape, when the cap is not restricted in its compacted form.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention is a collapsible baseball cap or a collapsible cap with a visor where the cap, by using a loop membrane, can be collapsed to a compacted shape where the shape is fittable in a shirt or pants pocket without the shape being unsightly. A retractable element of the membrane used within the frame of the cap allows the cap to return to its recognizable baseball cap shape when the cap is not restricted in its compacted shape. 
     2. Brief Description of the Prior Art 
     It is well known in the prior art that except when worn on one&#39;s head baseball caps are awkward to carry on one&#39;s person. The reason for this awkwardness is that the bill of the baseball cap is usually made of hard material and the general construction of the cap is semi-rigid in order to maintain the shape of the cap. 
     Numerous variations of hats have been developed in order to obtain a collapsible nature. Variations include either folding, twisting, or rolling up the hat into a compressed size. The structure of these variations differ from allowing a simple folding action to the complexity of a wire-like semi-flexible loop membrane sewn into the outer periphery of the crown of the hat. 
     In U.S. Pat. No. 5,845,339, an attempt is made to make a collapsible baseball cap using a loop of flexible material only with the bill of the cap. While this loop of flexible material can support the bill, the collapsing feature of the cap is similar to balling up a piece of fabric. This resulting ball of cap fabric makes the cap unsightly even if it were possible to fit the collapsed cap into a shirt pocket. 
     Hats that use a full loop membrane within the frame of the hat are intended to be twisted into two or three smaller loops, similar to collapsible auto shades that fold into small circles. However, use of a full loop membrane has not yet been able to be adapted for a baseball cap. The reasons for this are numerous. First, a full loop membrane used in a panama hat or in the auto shade described above does rot provide adequate support for the smaller and complex structure of a baseball cap. For example, in order for a hat to fit in a shirt pocket, it would have to be twisted several times. In the case of an autoshade, the membrane is constructed of a flat strip of metal. Because of its flat shape, the metal strip does not lend itself well to the re-application of folding itself into smaller form. If folding is attempted, the frame may be bent into a shape not recognizable as an autoshade. 
     Another reason for the inadequacy of the full loop membrane is that when resizing the baseball cap, a full loop membrane has a noticeable and varying impact on the structure of the bill of the cap. Also, in order to construct a frame adequate to accompany the full loop membrane, the frame would require welding, crimping or soldering metal pieces small enough to be used in a cap. Besides the inherent high cost associated with welding or soldering such small frames welded connection areas are more susceptible to breakage than the frame especially when the baseball cap is compacted or stowed away in a pocket. 
     It is seen from the foregoing that there is a need for a collapsible baseball cap which overcomes the disadvantages found in the prior art concerning structure, adjustability to size and durability of the frame when the cap is collapsed. Such a collapsible cap should be able to fit in a pocket either in the shirt or pants of the user. 
     SUMMARY OF THE INVENTION 
     It is therefore an object of the present invention to provide a collapsible baseball cap. 
     It is therefore a further object of the present invention to provide a collapsible baseball cap that when collapsed can fit in a shirt or hip pocket. 
     It is therefore a still further object of the present invention to provide a collapsible baseball cap that when collapsed does not appear unsightly when fit in a hip or shirt pocket. 
     It is therefore a still further object of the present invention to provide a collapsible baseball cap that automatically retracts to its original shape after its containment in compact form is removed. 
     It is therefore a still further object of the present invention to provide a collapsible baseball cap that can be contained by a device such as a zippered pouch or elastic band. 
     To attain the objects described, there is provided a collapsible cap in which adequate support in both the inner crown and the bill make it easy to twist the cap in several loops that it is small enough to fit into a shirt or pants pocket without being unsightly. A wire-like membrane is used to create support in both the crown and outer circle to support the bill. No glue, welding or soldering would be needed, if a single-wire membrane is used. 
     If the cap is folded or collapsed and containment of the compacted cap is removed, the retractable property of the membrane returns the cap to its original wearable shape. The cap can still be made resizable by crimping a small portion of the back of the cap to form an arch. This arch area would permit standard size adjustment devices such as a small elastic band or Velcro tabs to size the cap. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Thus by the present invention its objects and advantages will be realized, the description of which should be taken in conjunction with the drawings wherein: 
     FIG. 1 is an isometric view of the collapsible cap. 
     FIG. 2 is a depiction of the process for enclosing a single loop membrane into the baseball cap. 
     FIG. 3 is a depiction of the process to twist and fold the baseball cap into its collapsed state. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring now to the drawings wherein like numerals refer to like elements throughout the several views, one sees that FIG. 1 is an isometric view of the collapsible baseball cap  2  Cap  2  preferably has a material that is fabric-based; however, other suitable materials maybe used. Cap  2  is a structure comprising a crown  6  where the crown is a hollowed substantially half-spherical shape where the open circumference  8  is sized to fit a human head by being semi-flexible in directions  10 . 
     In the rear structure of the cap is arch section  11 . Arch section  11  is created by the crimping of loop membrane  24  (see FIG.  2 ). With fabric applied, arch section  11  allows for sizing of cap  2  with the use of adjustable strap  12  which is stitched to opposing sides of arch  12 . Adjustable strap  12  is preferably made of VELCRO or any other material suitable for the purpose of adjustment. Crown  6  can be reinforced by seams  13  which run from circumference  8  to central stitching point  14 . Seams  13  maintain the shape of crown  6  to resemble a cap. Sewn to or interwoven to an outer edge of circumference  8  is visor  16 . Visor  16  is a thickened substantially parabolic shape; however, other shapes are possible and are known to those skilled in the art. 
     FIG. 2 depicts the process of enclosing single loop membrane  24  into cap  2 . While a single loop membrane is depicted, two sections of loop membrane may be used (one section for circumference  8  and one section for visor  16 ). When two sections of loop membrane are attached by welding or soldering, they would comprise the features of a single loop membrane. 
     View A is a side view of membrane  24  in its flattened state. Single coiled type membrane  24  is preferably made of NITINOL; however, suitable alternatives may be used. The flexible spring-like and shape memory features of NITINOL allow membrane  24  to be collapsible yet retaining an ability to retract to a programmed shape. Because NITINOL has been used in manufacturing since the 1960&#39;s, it has been refined for use in lightweight products; therefore, ideally suited for baseball caps. In View B, membrane  24  is uncoiled and exposed to depict crimping of membrane  24  into a recognizable cap shape. Membrane  24  can also be crimped to size arch section  11  where arch section  11  would be a cap size adjusting area. 
     In an unstitched section shown by example but not limited to the magnified areas shown in View C, fabric  21  is positioned over membrane  24  such that all remaining fabric at circumference  8  or perimeter  20  is stitched where membrane  24  is now fully enclosed by the covering material of the cap. Fully formed cap  2  is shown in View D, where interior membrane  24  has retracted to its programmed state allowing cap  2  to resemble a recognizable baseball cap. 
     FIG. 3 depicts cap  2  being collapsed into its preferred compact embodiment, where cap  2  starts the process is in its recognizable baseball cap shape. Cap  2  is folded in direction  40  to result in crown  6  collapsed with seams  13  flattened to the plane of visor  16 . Distal edge  42  of circumference  8  is twisted in direction  44  to form a figure-eight configuration and to forwardly align with cutaway area  18 . Proximal side  46  is twisted inwardly in direction  48  toward the center of circumference  8 . Before or at this point, the spiral semi-concentric shape of enclosed membrane  24  should be felt and any further folding End twisting of crown  6  contributes to this semi-concentricity, as shown in folding directions  50 ,  52 . 
     As shown by direction  56 , visor  16  is twisted at midsection  58  to form a figure-eight configuration of two substantially circular areas  60 ,  62 . Circular areas  60 ,  62  are folded under each other in direction  64  to conform to the semi-concentricity of crown  6 . Resultant collapsed form  68  is now sized to comfortably fit in a shirt, pants pocket, or can be contained by a device such as a zippered pouch or elastic. When unrestricted by a containment device or pressure applied by the user, the programmed shape of membrane  24  retracts from collapsed form  68  to cap  2 ; thus returning to its state as a recognizable baseball cap. 
     Thus by the present invention its objects and advantages are realized and although preferred embodiments have been disclosed and described in detail herein, its scope should be determined by that of the appended claims.