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Filament wound multi-color arrow shaftRelated Patent Categories: Games Using Tangible Projectile, Projectile, Per Se; Part Thereof Or Accessory Therefor, Arrow, Dart, Or Shuttlecock; Part ThereofFilament wound multi-color arrow shaft description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060084534, Filament wound multi-color arrow shaft. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE INVENTION [0001] The present invention relates generally to the field of arrow shafts. BACKGROUND OF THE INVENTION [0002] Archery arrows with graphite or "composite" shafts are gaining in acceptance. Graphite shafts have reduced weight plus generally greater flex and strength than traditional materials. Traditionally however, graphite shafts have suffered from inconsistent manufacturing, higher costs, a soft feel and higher breakage rates. Composite graphite shafts have normally been made by either a sheet-rolling method or a filament winding method. [0003] In the sheet-rolling or sheet-wrapping method, carbon, glass or other fibers are impregnated with a plastic resin and placed in a parallel matrix to form a broad sheet or prepreg. The prepreg is then cut into smaller sheets with all of the fibers at a particular angle to the axis of the intended mandrel, the angle can be between 0.degree. and 90.degree.. These flags are then rolled around a mandrel to form various layers or plies. The layers are then cured to form a composite and the mandrel is removed. [0004] In the filament winding method, fibers are collected into groups called "tows" and each tow is impregnated with resin and wrapped around the mandrel to form the layers prior to curing. Filament winding generally results in an improved shaft with greater consistency in manufacture and control of fiber placement. [0005] Archery is generally used for hunting or target shooting. Various colors and patterns for arrows are sometimes desired. Arrows can be decorated using regular patterns for a desired ornamental look or irregular patterns such as camouflage patterns. Typical methods of imparting color and patterns to graphite arrow shafts include painting the material or wrapping the shaft in a tight-fitting, decorated material, for example a shrink-wrap film or decal. A film or decal may leave visible seams in the pattern. In an alternate method, some manufacturers have embedded a decorated material in a prepreg sheet to be wrapped in the outer layer around a shaft; however, this option is not available in filament winding. In some instances, the shafts are encased in a protective transparent mask or film after the decoration is added. These shafts are vulnerable to the outer decorative patterns being worn away or damaged for example due to heat and friction or scratches after a period of use. SUMMARY OF THE INVENTION [0006] In one embodiment of the present invention, a method is disclosed of making an arrow shaft having multiple graphite plies. The method includes forming an arrow shaft core of one or more filament wound or sheet-rolled fiber reinforced graphite plies around a mandrel. A first filament wound ply including at least a first color is wound around the core. A second filament wound ply including at least a second color differing from the first color is wound around the core and the first ply. The first filament wound ply and the second filament wound ply form an arrow shaft outer layer with a thickness and having an outer diameter equal to or greater than the desired shaft finished outer diameter. The shaft is then finished, including removing the mandrel from the shaft, and defining an arrowhead mounting portion and a nocking point portion on the shaft. [0007] In another embodiment of the present invention, a method is disclosed of making an arrow shaft having multiple graphite plies. The method includes winding filaments including at least a first color around a mandrel, and wrapping filaments of at least a second color differing from the first color around the mandrel. The filaments are incorporated in the thickness of an arrow shaft, and the first color and the second color create a color pattern extending through at least a substantial portion of the thickness of the shaft. The shaft is then removed from the mandrel, and an arrowhead mounting portion and a nock mounting portion are on the defined shaft. [0008] In yet another embodiment of the present invention, a composite arrow shaft is formed from multiple fiber reinforced graphite plies forming a core for an arrow shaft having two ends. The core is formed of one or more filament wound or sheet-rolled fiber reinforced graphite plies; and an outer layer is formed of at least one ply filament wound around the core to form an arrow shaft with a desired total diameter. The outer layer preferably includes filaments of at least two different colors. The shaft includes an arrowhead mounting section at one end of the shaft and a nocking section at the opposing end of the shaft. [0009] In yet another embodiment of the present invention, a composite arrow shaft with a length is formed from multiple fiber reinforced graphite plies. The shaft is formed with one or more filament wound plies, and includes a first filament wound portion including filaments of a first color, and a second filament wound portion including filaments of a second color. Preferably the first color is different from the second color. [0010] It is an object of the invention to provide an improved arrow shaft. [0011] Further objects, features and advantages of the present invention shall become apparent from the detailed drawings and descriptions provided herein. BRIEF DESCRIPTION OF THE DRAWINGS [0012] FIG. 1 is an illustration of an arrow according to a preferred embodiment of the present invention. [0013] FIGS. 2A and 2B are perspective views of steps in a sheet-rolling process. [0014] FIG. 2C is a cross-sectional view of a shaft made with the sheet-rolling process. [0015] FIGS. 3A, 3B and 3C are perspective views of the process of filament winding used in some embodiments of the present invention. [0016] FIG. 4 is a perspective view of filament winding over sheet-rolling wrapping in one embodiment of the present invention. [0017] FIGS. 5A and 5B are cross-sectional, cut-away views of an arrow shaft according to certain embodiments of the present invention. [0018] FIGS. 6A, 6B and 6C are partial views of wrapping and winding patterns in certain embodiment of the present invention. [0019] FIGS. 7A and 7B are partial views of an alternate preferred embodiments of finished shaft views according to the present invention. [0020] FIGS. 8A and 8B are alternate preferred embodiments of the present invention. Continue reading about Filament wound multi-color arrow shaft... Full patent description for Filament wound multi-color arrow shaft Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Filament wound multi-color arrow shaft patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Filament wound multi-color arrow shaft or other areas of interest. ### Previous Patent Application: Table-tennis bat(pen-holding type) Next Patent Application: Turbine-tip arrowhead Industry Class: Games using tangible projectile ### FreshPatents.com Support Thank you for viewing the Filament wound multi-color arrow shaft patent info. 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