DK148584B

DK148584B - SPORTS BALL WITH A COVER AND WITHIN THIS INFLATABLE RUBBER BLADE

Info

Publication number: DK148584B
Application number: DK147778AA
Authority: DK
Inventors: Vladimir Uruba; Zdenek Figalla; Veroslav Svub; Milan Burian
Original assignee: Gala Np
Priority date: 1977-04-13
Filing date: 1978-04-04
Publication date: 1985-08-12
Also published as: PL205978A1; DE2813441B2; RO85041A; CS193832B1; HU184115B; SE437938B; DK147778A; DE2813441C3; FR2387057A1; ATA238778A; IT1192618B; SE7804153L; IT7867784A0; DK148584C; RO85041B; GB1573079A; NL7803021A; DE2813441A1; AT369271B; DD135691A1

Description

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Opfindelsen angår en sportsbold med en opblæselig 5 gummiblære og af den i kravets indledning angivne art. En sådan sportsbold er kendt fra USA-patent-skrift nr. 27 6l 684, hvor der ved fremstilling af sportsbolden anvendes et vulkaniserbart kautsjuk-klæbestof, der holder armeringen af opviklede tråde 10 sammen som et hele. Trådene i armeringen kan være o imprægneret med et vulkaniserbart klæbestof, hvad der letter deres fiksering under opviklingen og den "senere brug. En sådan imprægnering bevirker dog også en fast vulkanisering af trådene til gummiblæren.The invention relates to a sports ball having an inflatable rubber ball and of the kind specified in the preamble of the claim. Such a sports ball is known from United States Patent No. 27,66868, in which the sports ball uses a vulcanizable rubber adhesive which holds the reinforcement of wound threads 10 together as a whole. The wires in the reinforcement may be impregnated with a vulcanizable adhesive, which facilitates their fixation during winding and its "later use. Such impregnation, however, also causes a solid vulcanization of the wires to the rubber bladder.

15 Derved er denne ikke mere udskiftelig.15 This is no longer interchangeable.

Anvendelsen af ikke-imprægnerede tråde har den ulempe, at trådene under opviklingen og også ved benyttelsen af bolden kan forskyde sig, hvorved på 20 den ene side stabiliteten af boldhylstret bliver stærkt nedsat, og der på den anden side sker en uønsket masseforskydning inde i boldhylstret. Derfor anvendes i den industrielle teknik til boldfremstilling kun tråde, der i forvejen er imprægne-25 ret med klæbestof.The use of non-impregnated threads has the disadvantage that the threads during winding and also during the use of the ball can displace, thereby greatly reducing the stability of the ball casing and on the other hand an undesirable mass displacement within the ball casing . Therefore, in the industrial technique for ball making, only threads that are already impregnated with adhesive are used.

Imprægneringen af trådene med et vulkaniserbart kautsjukklæbestof har den fordel, at trådene navnlig ved vikling af de første vindinger straks fikseres 30 på gummiblæren i deres viklingsstilling, hvilket letter fremstillingen betydeligt. Denne anvendelse af imprægnerede tråde har dog, den ulempe, at gummiblæren ikke mere kan tages ud af sportsbolden, som det er kendt fra sportsbolde, hvis gummiblære er 2The impregnation of the threads with a vulcanizable rubber stick adhesive has the advantage that the threads, especially when winding the first turns, are immediately fixed to the rubber bladder in their winding position, which greatly facilitates the manufacture. However, this use of impregnated threads has the disadvantage that the rubber bladder can no longer be removed from the sports ball, as is known from sports balls whose rubber bladder is 2

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1 indlagifc i et af læderstykker sammensyet hylster, eller som det er tilfældet ved sportsbolde ifølge østtysk patentskrift nr. 76 176, ved hvilke armeringen består af et lagdelt overtræk af vævdele, der er 5 bestrøget med klæbestof. Disse vævdele er flade dele, hvis tråde ved vævningen er forbundet med hinanden og fastlagt. Ved fremstillingen bliver vævdelene sammenklæbet med hinanden, men ikke med overfladen på luftblæren. Sådanne bolde har den fordel, 10 at luftblæren kan udskiftes, så at boldhylstret, når en gummiblære er blevet defekt, kan benyttes igen med en ny gummiblære, men boldene har den· u-lempe, at massefordelingen i boldhylstret ikke er så jævn som ved bolde, hvis armering består af 15 omviklede tråde. Desuden er tilbagespringsegenskaberne ikke så gode og jævne ved bolde af den nævnte art som ved bolde af den førstnævnte art, hvis armering består af omviklede tråde.1 in a casing embroidered in a leather piece, or as is the case with sports balls according to East German patent specification 76 176, in which the reinforcement consists of a layered coating of woven parts coated with adhesive. These weave parts are flat parts whose threads of the weave are interconnected and fixed. In fabrication, the tissue parts are glued to each other, but not to the surface of the air bladder. Such balls have the advantage that the air bladder can be replaced so that when a rubber bladder has become defective the ball casing can be reused with a new rubber bladder, but the balls have the disadvantage that the mass distribution in the ball casing is not as even as balls whose reinforcement consists of 15 wrapped threads. In addition, the kickback properties are not as good and even with balls of the aforementioned kind as with balls of the former kind, whose reinforcement consists of wrapped threads.

20 Den foreliggende opfindelse tager sigte på at angive en sportsbold af den i kravets indledfting omhand-. lede art, men hvor gummiblæren er udtagelig og altså udskiftelig, hvis den bliver defekt.The present invention is intended to provide a sports ball of the subject-matter of the claim. guide species, but where the rubber bladder is removable and thus replaceable if it becomes defective.

25 Dette opnås ifølge opfindelsen ved, at sportsbolden er udformet som angivet i kravets kendetegnende del.This is achieved according to the invention in that the sports ball is designed as indicated in the characteristic part of the claim.

Ved denne udformning opnår man at gummiblæren, 30 når den bliver defekt, kan udtages af boldhylstret, idet klæbestoflaget på armeringen har ringe hæfteevne med gummiblæren, hvorved man får mulighed for at erstatte den defekte gummiblære med en ny gummiblære. Da trådene i armeringen ved bolden ifølge op- 3 148584 1 findelsen er forbundet fast med hinanden, fås der et meget stabilt boldhylster, hvis massefordeling ikke ændrer sig under brugen, og hvis massefordeling har den ønskede høje ensartethed. Desuden 5 er boldens tilbagespringsegenskaber fremragende.In this embodiment, it is achieved that the rubber bladder, when it becomes defective, can be removed from the ball casing, since the adhesive layer on the reinforcement has poor adhesion with the rubber bladder, thereby allowing the defective rubber bladder to be replaced with a new rubber bladder. As the strands of the reinforcement at the ball according to the invention are interconnected, a very stable ball casing is obtained whose mass distribution does not change during use and whose mass distribution has the desired high uniformity. In addition, 5 ball kickback properties are excellent.

Fremstillingen af sportsbolden ifølge opfindelsen er enkel, fordi de omviklede tråde straks lægger sig fast på det klæbestoflag, der er påført på 10 gummiblæren. Yed anvendelsen af et klæbestoflag, som kan opsplittes er det dog samtidig sikret, at gummiblæren kan tages ud af sportsbolden uden at dele af den bliver hængende på den indre overflade af sportsboldhylstret ved udtagelsen og der-15 ved på ugunstig måde ændrer massefordelingen.The manufacture of the sports ball according to the invention is simple because the wrapped threads immediately adhere to the adhesive layer applied to the rubber blister. However, by the use of an adhesive layer which can be split, it is also ensured that the rubber bladder can be removed from the sports ball without parts of it hanging on the inner surface of the sports ball casing at the withdrawal and thereby adversely changing the mass distribution.