Patent Abstract:
An elastomer fishing lure skirt comprising a silicone based elastomer substrate having a rough side wherein the substrate is separated into a plurality of filaments. The lure skirt further comprises an adhesive such as Chemlock 697, RTV adhesive, Lock Tight, or combinations thereof. The lure skirt further comprises a biaxially-oriented polyethylene terephthalate polyester film having a metalized foil, colored foil, holographic film, or combinations thereof bonded to its surface. Additionally, the lure skirt includes a means for semi-permanently binding the filaments together to form said lure skirt.

Full Description:
RELATED CASES  
       [0001]    This application claims the Priority of the Provisional Application Ser. No. 60/783,199 filed Mar. 16, 2006. This application is a continuation of application Ser. No. 11/687,034 filed Mar. 16, 2007. 
     
    
     FIELD OF THE INVENTION  
       [0002]    Silicone based elastomer substrate laminated with biaxially-oriented polyethylene terephthalate polyester film, and articles made therefrom are discussed herein. 
       BACKGROUND OF THE INVENTION 
       [0003]    Fishing lure skirts made from silicone are commercially available. Silicone fishing lure skirts with color and glitter additives have been widely accepted, as they appear colorful and work as a fish attractant. They can be molded or calendered into various shapes, normally sheets or tape and slit or dye cut into strands, then banded together to form a silicone fishing lure skirt. They can also be printed to add a fish scale like pattern to give a more life like appearance. Other products such as colored nylon, colored spandex, and coated polyester can be used as a skirt dressing for fishing lures. 
         [0004]    The standard silicone fishing lure skirt with the introduction of colorant and glitter presents an acceptable profile as it is trolled or retrieved but the glitter shows minimal flash or reflection due to the fact that it is embodied within the silicone strands. The other products such as colored nylon, colored spandex, coated polyester present good flash and reflectivity, but due to their lack of elasticity and thickness, they collapse, tear apart, and present a poor profile when trolled, retrieved and fished. 
         [0005]    Whether a lure is sinking or floating, its purpose is to attract the attention of the fish by simulating the look and movement of their natural prey. The idea is to have the fish react to the lure as if it is food or a threat within its territory. To this end the lure skirt has been developed over the years for a variety of fishing lures. In both fresh-water and salt water applications skirts are used to enhance and exaggerate lure movements. Skirts are also used to camouflage the hook in the lure. It is also believed that colored skirts attract attention or agitate the fish or exaggerate the movement of the lure. 
         [0006]    U.S. Pat. No. 3,021,632 discloses the use of metalized plastic sheet film shredded into narrow ribbons having straight or serrated edges. The narrow ribbons are formed into a skirt and adhered to a fishing lure. However, the skirt lacks elasticity and may present a poor profile. 
         [0007]    U.S. Pat. No. 5,251,395 discloses a metalized foil bonded to a silicone elastomer. The metalized foil is formed onto a Mylar carrier and the Mylar is removed when the foil is adhered to the silicone elastomer. However, this skirt may present a poor profile since the Mylar backing is removed. 
         [0008]    U.S. Pat. No. 6,105,304 discloses a fishing lure skirt comprising a metalized foil bonded to a silicone elastomer. The cross-sectional thickness of the fishing lure skirt is smaller at its distal and steadily increases in size toward its proximal end. However, this skirt may present a poor profile due to the lack of a Mylar layer. 
         [0009]    U.S. Pat. Nos. 6,272,787 and 6,544,372 each disclose a fishing lure skirt comprising a silicone rubber substrate and a room temperature vulcanizing (RTV) adhesive ink mixture. The RTV adhesive ink mixtures is used to illustrate fish scales or other patterns and as an adhesive to bond foils onto cured silicone rubber. The metalized foil utilized a Mylar backing that is removed once the foil has bonded to the silicone rubber. However, this skirt may present a poor profile since the Mylar backing is removed. 
         [0010]    While each of the foregoing provides a type of lure skirt which functions as an attractant for fish, there is a need for improvement in both flash and maintaining an attractive profile for lure skirts under water. 
       SUMMARY OF THE INVENTION 
       [0011]    An elastomer fishing lure skirt comprising a silicone based elastomer substrate having a rough side wherein the substrate is separated into a plurality of filaments. The lure skirt further comprises an adhesive such as Chemlock 697, RTV adhesive, Lock Tight, or combinations thereof. The lure skirt further comprises a biaxially-oriented polyethylene terephthalate polyester film having a metalized foil, colored foil, holographic film, or combinations thereof bonded to its surface. Additionally, the lure skirt includes a means for semi-permanently binding the filaments together to form said lure skirt. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0012]      FIG. 1  illustrates an embodiment of a lure skirt on a lure. 
           [0013]      FIG. 2  is an exploded view of the components of a preferred form of the lure skirt. 
           [0014]      FIG. 3  is a cross-sectional view taken through a portion of a preferred form of the lure skirt. 
       
    
    
     DETAILED DESCRIPTION 
       [0015]    Referring to the drawings, there is shown in  FIG. 1  an embodiment of a lure skirt  10  used in conjunction with a lure  85 . A lure skirt is generally made up of a plurality of strands. These strands may be of the same color or varied in color. The number of strands may vary from one embodiment of a lure skirt to another. A lure skirt  10  may be used in conjunction with a variety of lure types including, but not limited to, buzz baits, spinners, spinner baits, plugs, crankbaits, jigs, wobblers, surface lures, and spoons. 
         [0016]    A lure skirt  10  may be comprised of basic components such as a silicone based elastomer substrate  100 , an adhesive  110 , a biaxially-oriented polyethylene terephthalate polyester film (hereafter boPET film)  120 , and a coated layer  130 . With attention to  FIGS. 2 and 3 , the details of the construction of the presently improved lure skirt  10  are provided. A lure skirt  10  is generally fabricated by layering a plurality of materials on top of one another and adhering or bonding those materials together either permanently or semi-permanently.  FIG. 3  depicts one embodiment of a cross-sectional view of the four layer construction of a lure skirt  10 . 
         [0017]    The base of the lure skirt  10  is comprised of a silicone based elastomer substrate  100 . Silicone based elastomer substrate may be obtained from companies such as Dow Corning of Midland, Mich. In one embodiment, 5¾″×12″ silicone sheets are compression molded, the sheets are then dye cut into strands. The strands can be either multiple individual strands or a block cut which has a first end having a unified section and a second end being comprised of a plurality of individual strands. This block cut reduces the total number of individual pieces that must be secured to create the lure skirt  10 . In one embodiment of the present invention, the silicone based elastomer substrate  100  has a Shore A hardness of 20-80 durometer. 
         [0018]    The Shore hardness is measured with an apparatus known as a Durometer and consequently is also known as ‘Durometer hardness’. The hardness value is determined by the penetration of the Durometer indenter foot into the sample. Because of the resilience of rubbers and plastics, the indentation reading my change over time—so the indentation time is sometimes reported along with the hardness number. The ASTM test method designation is ASTM D2240 A and is generally used in North America. The Shore A is used to measure soft elastomeric compounds, harder compounds can be measured with a Shore D, Durometer. Related methods include ISO 7619 and ISO 868; DIN 53505; and JIS K 6301, which was discontinued and superseded by JIS K 6253. The results obtained from this test are a useful measure of relative resistance to indentation of various grades of polymers. As an example a rubber band would probably fall in the range of a shore A Durometer of 25-35. 
         [0019]    The lure skirt  10  uses an adhesive  110  to bond the silicone based elastomer substrate  100  to the boPET film  120 . While any type of adhesive may be used it has been found that a RTV (room temperature vulcanizing) adhesive, Chemlok 697, and Loctite work well in this application. RTV adhesives are available from G.E. and Dow-Corning of Midland, Mich. Chemlok adhesives are available from the Lord Corporation of Cary, N.C. Loctite adhesives are available from Henkel International of Irvine, Calif. 
         [0020]    Biaxially oriented polyethylene terephthalate polyester film (hereafter boPET film)  120  is made from ethylene glycol and dimethyl terephthalate. BoPET film  120  is sold under the trademark Mylar and is available from DuPont Teijin Films of Wilmington, Del. In one embodiment of the present invention, the boPET film  120  has a thickness of between 0.25 mm and 0.46 mm. The boPET film  120  has a coating  130  on its surface. The boPET film  120  may be coated with a metalized foil, colored foil, holographic film, or combinations thereof. In yet another embodiment, a boPET film  120  may be coated with a material including, but not limited to, a chrome material, a gold material, a colored material, a holographic material, or combinations thereof. In yet another embodiment, the coating  130  is no more than 0.05 mm in thickness. 
         [0021]    After the silicone based elastomer substrate  100 , the adhesive  110 , and the boPET film  120  having a coating  130  on its outer surface are laminated together creating a laminated elastomer substrate, a lure skirt may be assembled. In one embodiment of the present invention the lure skirt  10  may be assembled after cutting a sheet of laminated elastomer substrate. The sheets may be dye cut into strands. The strands can be either multiple individual strands or a block cut which has a first end having a unified section and a second end being comprised of a plurality of individual strands. In one embodiment of the present invention, the strands may be attached manually, mechanically or robotically to one another. In an alternative embodiment, a first band of adhesive  110  is applied either manually, mechanically or robotically to a plurality of strands which are subsequently attached to one another manually, mechanically or robotically. 
         [0022]    A lure skirt described above may be attached or incorporated into a fishing lure through a variety of mechanisms including, but not limited to, rubber bands, wires, clasps, adhesives, fishing line, collars, or any combination thereof. 
         [0023]      FIG. 1  illustrates one embodiment of the present invention wherein a lure skirt  10  is engagement with a lure  85 . In one embodiment of the present invention the lure skirt  10  is positioned above the hook  95  of the lure  85 . Positioning the lure skirt  10  in this manner may allow the lure skirt  10  to camouflage the hook  95  and to increase the profile of the lure  85  both in and out of the water. 
         [0024]    The strands of the lure skirt  10  may have a color component which can be incorporated directly into the silicone based elastomer substrate  100 . These strands may incorporate a color additive, or colorant, which is selected from the group consisting of: pigment, dye, color, glitter, mica, or combinations thereof. It is also possible for the colorant to be applied to the surface of the silicone based elastomer substrate  100  by a spray, printing or direct application method such as by brush or roller. 
         [0025]    A process for laminating a sheet of boPET film  120  to a silicone based elastomer substrate  100  is also disclosed herein. The process may include providing a sheet of silicone based elastomer substrate  100  and providing an adhesive  110  such as Chemlok 697, RTV adhesive, Loctite, or combinations thereof. The process may further include providing a sheet of boPET film  120 . The boPET film  120  may be coated on one or more sides with a material such as chrome, gold, colored, holographic coating, or combinations thereof which are available from Crown Roll Leaf of Patterson, N.J. and Transfer Print Foils, Inc. of East Brunswick, N.J. The process may then involve roughing up the surface of the sheet of silicone elastomer  100 , coating the roughed up sheet of silicone elastomer  100  with the adhesive  110 , pressing the sheet of boPET film  120  onto the coated sheet of roughed up silicone elastomer  100 , and heat curing the sheet of boPET film  120  to the coated sheet of roughed up silicone elastomer  100  while under pressure. 
         [0026]    The outer surface of the silicone based elastomer substrate  100  may be roughed up on one or more sides prior coating the silicone based elastomer substrate  100  with adhesive  110 . In one embodiment of the present invention, the roughing up of the surface of the silicone based elastomer substrate  100  may be accomplished with a material including, but not limited to, a metal brush, sandpaper, a blade, a nail, metal spikes, wooden spikes, a scouring pad, gravel, glass, plastic, or combinations thereof. Using a rough outer surface is in direct contradiction of prior art teachings such as U.S. Pat. No. 6,544,372 which utilizes RTV adhesive inks to bond foil to a silicone rubber substrate. &#39;372 discloses at Column 5, Lines 15-19, “It has been determined that the foil does not bond well to rough rubber or granular, inked surfaces. Foil adhesion can therefore be prompted by conditioning the substrate during or after curing with a smooth mold cavity or smoothing template.” 
         [0027]    Adhesive  110  is applied either manually, mechanically or robotically, to the surface of the silicone based elastomer substrate  100 . In one embodiment of the present invention, sufficient adhesive  110  may be applied to the roughed up surface of the silicone based elastomer substrate  100  either manually, mechanically or robotically. The adhesive  110  may be applied to the silicone based elastomer substrate  100  either before or after the sheet of silicone based elastomer substrate is dye cut into strands. 
         [0028]    After an adhesive  110  is applied to the surface of the silicone based elastomer substrate  100 , the boPET film  120  with a coating  130  on its outer surface is then pressed onto the adhesive  110 . This serves to bond the boPET film  120  to the silicone based elastomer substrate  100 . In one embodiment of the present invention, the boPET film  120  having a coating  130  may be bonded to the silicone based elastomer substrate  100  with an adhesive  110  followed by calendering to facilitate the bonding of all layers to one another. 
         [0029]    A lure skirt  10  may then undergo heat curing while under pressure to promote adhesion between the various layers. There are several ways that cure can be accomplished. In one embodiment of the present invention, the assembled skirt may be calendered to facilitate the bonding of all layers to one another. In an alternative embodiment, the assembled skirt may be sent through a curing oven to cure the adhesive  110  and promote the adhesion between the silicone based elastomer  100 , and the boPET film  130  with coating  140 . In an alternative embodiment, the temperature may range between 20° C. and 100° C. In yet another alternative embodiment, the pressure may range between 68,900 Pa and 6,890,000 Pa (10 and 1000 psi). In still another alternative embodiment, the lure skirt  10  may be cured at a temperature in the range of 20° C. and 100° C. and at a pressure in the range of 68,900 Pa and 6,890,000 Pa (10 and 1000 psi). In still another alternative embodiment, the skirt might be set out at room temperature, defined to be between from 20 to 25° C. for a period of time long enough to effectuate cure. If the skirt is manufactured in a region where the ambient temperatures regularly exceed the definition of room temperature, in excess of 25° C., then leaving the skirts out in this environment will also effectuate cure. 
         [0030]    The present invention may be embodied in other forms without departing from the spirit and the essential attributes thereof, and, accordingly, reference should be made to the appended claims, rather than to the foregoing specification, as indicated the scope of the invention.

Technology Classification (CPC): 8