FI57696C - BLADKONSTRUKTION PAO KLUBBA SOM ANVAENDES I ISHOCKEY ELLER MOTSVARANDE SPEL - Google Patents

Description

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Pntenth oeh ragisterstyralsan 7 Arastan «tegd oeh utUkrifUn pubiinrad 30.06.80 (32) (33) (31) Pyfdettjr« tuolktu * —Wgird priorltat (71) Karhu-Titan oy, Uudenmaankatu 2k A, 00120 Helsinki 12, Suomi-Finland (Fl ) (72) Antti-Jussi Tiitola, Tampere, Finland-Finland (FI) (7 * 0 Forssan & Salomaa Oy (5¾) Mileage blade structure used in hockey or similar games -

Bladkonstruktion p & klubba som användes i ishockey eller motsvarande spel (6l) Addendum to patent 50584 - Tillägg till patent 50581 (

The invention relates to a racket blade structure for use in hockey or a similar game according to claim 1 of main patent No. 50584, in which layers of reinforced plastic at least substantially the entire length of the blade are laminated on each side of the blade core part, with protective layers of cotton veneer or the like. preferably a one-piece core body.

The present invention therefore relates to the development result of a racket blade according to the main patent. The racket blade according to the invention can be used in connection with racket shaft structures other than those according to the main patent.

With regard to the state of the art of the invention, reference is made to Finnish patent publication 42515 *, for which it is essential for a known racket to consist of core pieces whose symmetrical racket thicknesses Based on the experience gained in use, the strength properties of the rackets according to said patent have proved to be of high quality. However, the weakest point of this racket has been the lower edge of the razor blade exposed to wear. The top edge of the racket blade is also prone to damage. The consequence of the wear of the lower edge is that the strong laminates essential for the strength of the club structure are torn off from the core body, which damages the blade part of the club. It is an object of the present invention to obviate the above-mentioned drawback and to further develop the racket blade according to the main patent by applying the inventive idea of the main patent.

It is a further object of the invention to make the manufacture of the racket even simpler so that no core parts requiring separate attachment of the racket blade are required.

In order to achieve the above objects, the invention is mainly characterized in that the core body is made of wear-resistant plastic, preferably thermoplastic thermoplastic such as ABS plastic, and that the core body forms wear- and impact-resistant edges at the top and bottom of the racket blade and preferably at the tip.

The invention will now be described in detail with reference to an embodiment of the invention shown in the figures of the accompanying drawing, to which the invention is in no way limited. _

Figure 1 shows a side view of the core part of the racket blade with the core part coated with the necessary layers.

Figure 2 shows a life-size cross-section of point II-II marked in Figure 1.

Fig. 5 shows a life-size cross-section of the point ΪΙΙ-ΙΙΙ marked in Fig. 1.

The core part (middle part) of the racket blade according to the invention, the purpose of which is to give the racket blade suitable dimensions, but which otherwise does not mainly affect the strength of the blade, consists of one integral core piece 10.

5,57696

In Fig. 1, a core body of a racket shank, the structure of which is not relevant to the invention, is denoted by reference numeral 14. For connecting the shank and the blade, the blade core piece has an inlet bounded by protrusions 10d and 10e. The core piece 10 of the pallet is made of a wear-resistant thermoplastic thermoplastic such as ABS (ABS * acrylonitrile butadiene styrene) or other similar plastic. The core body 10 tapers towards the tip 10c and towards its upper edge (Figures 2 and 3) ·

For example, it is known from Finnish patent 42515 to press layers of reinforcing plastic 11 on both sides of the core body 10, which extend substantially at least to the length and width of the blade blade and possibly also the arm 14. The layers 11 are preferably fastened on top of the reinforced plastic layers 11 in the same pressing step to protect the wood veneers 12. The wood veneers 12 can be replaced, for example, by corresponding plastic layers or textile coverings. The edge of the wood veneers 12 or the reinforced plastic layers 11 is shown in Fig. 1 by a broken line 13 ·

During the machining step of the pallet, care is taken that the reinforced plastic layers 11 giving strength to the pallet do not extend completely to the lower edge 10a of the core body 10, but a wear-resistant material forms a structure. Likewise, a wear and impact resistant plastic edge is formed in the upper edge 10b of the racket.

The solution according to the invention results in a structure in which the different parts of the structure function in well-defined separate tasks. The core body 10, made of a sufficiently durable and light and easy-to-machine and deformable material, keeps the load-bearing reinforced plastic layers 11 at a suitable distance from each other to provide sufficient strength and rigidity of the club. The plastic or wood layers 12 protect the reinforced plastic layers 7 against scratches and abrasion. A base rail formed from the lower part of the core body 10 receives shocks between the racket and the ice, and protects the bottom of the blade from wear. The front and top edges 10c, 10b of the core body 10 form an impact-resistant rim on the platform. It is also important that the thermoplastic wear edge 10a, 10e extends over the entire length of the pallet.