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Surf board and adhesive film for surf boardRelated Patent Categories: Buoys, Rafts, And Aquatic Devices, Water Skimming Or Walking Device, SurfboardSurf board and adhesive film for surf board description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060057913, Surf board and adhesive film for surf board. Brief Patent Description - Full Patent Description - Patent Application Claims
TECHNICAL FIELD [0001] The present invention relates to a surfboard aimed at improving a movement performance and a change of direction, etc. thereof and to an adhesive film for a surfboard. BACKGROUND ART [0002] A conventional surfboard comprises a foam core having a super high density and formed into a desired contour of surfboard and an outer skin formed of a reinforced plastic resin, typically a plastic reinforced with a fiber cloth of such as glass fibers etc. and integrally laminated on the surface of the foam core. And, there has been preferably in general to finish it by a polishing treatment in order to in order to decrease a water flow resistance of the outer skin as much as possible. [0003] Also, a single fin or plural fins is/are to be attached to the rear area of the water contact bottom surface of the surfboard is produced in almost the same manner as the case of production of the above-mentioned surfboard and has almost the same construction as the surfboard, and as a fiber cloth embedded in the reinforced plastic constituting the outer skin thereof, there has been used, besides the glass fiber cloth, a carbon fiber cloth or a mixed fiber cloth made of both of glass fibers and carbon fibers. [0004] However, when the surface of the conventional surfboard and that of the fin thereof as mentioned above are observed using an optical laser measurement apparatus, it has been found that their surfaces are unexpectedly rough and are large in a water flow resistance. [0005] In view of the results of the above-mentioned study, an object of the present invention is to provide a surfboard that is decreased in a water flow resistance to be improved in a movement performance such as a speed and a directional change or the like, as compared with the conventional surfboards. DISCLOSURE OF THE INVENTION [0006] The present invention lies in a surfboard characterized in that a tough and flexible synthetic resin film having a surface smoothness and patterned to be adaptable to be adhered to a rear area of a water contact bottom surface of a surfboard is adhered through an adhering agent such as a bonding agent or/and an adhesive agent to the rear area of the water contact bottom surface or/and both side faces of a fin. Consequently, each of the respective surfboards according to the present invention, owing to the surface smoothness of the foregoing Synthetic resin film adhered to the rear area of the water contact bottom surface thereof or/and to that of both the side faces of the fin, there can be obtained the surfboards which is improved in a movement performance such as a speed or a change of direction, etc. as compared with the conventional surfboards. The effect of the improvement in the above-mentioned movement performances is increased in the order of a case of adhering the synthetic resin film to both the side faces alone of the fin, a case of adhering it to the rear area alone of the water contacting bottom surface, and a case of adhering it to both of the side faces of the fin and the rear area. [0007] Further, in the present invention, as for the synthetic resin films for adherence, there can be used any desired synthetic resin film selected from a group of polyester resin, polyamide resin, polyethylene resin, polypropylene resin, polyacrylate resin, polycarbonate resin, ABS resin, fluorinated resin and polyvinyl chloride resin. These synthetic resin films are preferable, because they are excellent in mechanical strength, water resistance, weather resistance, durability, impact resistance, etc. [0008] Furthermore, as to the synthetic resin films used in the present invention, any one having such a degree of the surface smoothness that is less than 0.2.mu. in the high and low height difference throughout the whole surface thereof is preferably used. [0009] Furthermore, in the present invention, in producing the surfboards according to the present invention, in order that the adhering work of the synthetic resin film for adherence can be carried out at a high efficiency and at a low price, it is preferable to use an adhesive synthetic resin film used for a surfboard comprising a tough and flexible synthetic resin film for adherence having a surface smoothness that is patterned into a shape adaptable to adhering to the rear area of the water contact bottom surface of the surfboard or to both the side faces of the fin, an adhering face formed by coating an adhesive agent onto the rear surface of the film, and a released paper temporarily applied to the adhering face. [0010] Furthermore, as the adhesive synthetic resin film for a surfboard according to the present invention, when there is used such a one produced by such a manner that the adhering face is formed by coating the adhesive agent partially in a regular or irregular manner so as to form a lot of air escape grooves communicating to the exterior among a lot of coated portions, there remains no bubbles between the adhering face of the adhesive film and the adhered surface of the surfboard side, so that the adhesive film can be satisfactorily adhered to the entire surface thereof. [0011] Furthermore, as the adhesive synthetic film for a surfboard, if the adhesive film is composed of plural divided pieces, the divided pieces can be adhered to the above-mentioned specific portion(s) with a desired space left between them. [0012] Furthermore, as the adhesive synthetic resin film for adherence used for the synthetic resin adhesive film for a surfboard according to the present invention, there may be used any kind one of a transparent (including semi-transparent) film, an opaque film, a colorless film, a colored film in a desired color, a any kind of printed films bearing a desired indication such as such as characters, designs, pictures, patterns, or combinations of such indications, or the like on the surfaces thereof, and accordingly manufacturers of surfers, distributors or consumers such as surfers can select from the above-mentioned various kinds of adhesive films and put the selected ones to their surfboards, so that their desired surfboards can be produced. [0013] And, the manufacturers or the consumers can select from the various kinds of the adhesive surfboard films for surfboards which are different in patterns or sizes also, and after peeling off the released papers of the selected ones, put them to the foregoing specified rear portions of the conventional surfboards, so that surfboards which are different in the improved movement performances such as the improved speeds can be made according to their desire. BRIEF DESCRIPTION OF THE DRAWINGS [0014] FIG. 1 is a rear view of a surfboard in one embodiment of the present invention. [0015] FIG. 2 is a magnified cross-sectional view along a line II-II in FIG. 1. [0016] FIG. 3 is a partially cut-off front view of an adhesive film for a surfboard in one embodiment of the present invention. [0017] FIG. 4 is a perspective view of a bottom surface of a surfboard in another embodiment of the present invention. [0018] FIG. 5 is a partially cut-off front view of an adhesive film used for adhering to the surfboard as shown in FIG. 4. [0019] FIG. 6 is a magnified cross-sectional view along a line VI-VI in FIG. 4. [0020] FIG. 7 is a perspective view of a bottom surface of a surfboard of further another embodiment of the present invention. Continue reading about Surf board and adhesive film for surf board... Full patent description for Surf board and adhesive film for surf board Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Surf board and adhesive film for surf board 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. 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