RADIAL TIRE

PURPOSE:To prevent a joint part between a side wall rubber layer and a tread rubber layer from being separated with each other by forming annular grooves on the upper and lower parts of an boundary line appearing on the outer surface of a tire corresponding to the joint surface between said both lay...

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Bibliographic Details
Main Author KAKUMARU KAZUO
Format Patent
LanguageEnglish
Published 27.02.1985
Edition4
Subjects
DEVICES OR ARRANGEMENTS RELATED TO TYRES
PERFORMING OPERATIONS
REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL
TRANSPORTING
TYRE CHANGING OR REPAIRING
TYRE INFLATION
VEHICLE TYRES
VEHICLES IN GENERAL
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Summary:PURPOSE:To prevent a joint part between a side wall rubber layer and a tread rubber layer from being separated with each other by forming annular grooves on the upper and lower parts of an boundary line appearing on the outer surface of a tire corresponding to the joint surface between said both layers, in a radial tire including said layers integrally stacked. CONSTITUTION:A radial tire being a so-called TOS structure is constructed by deforming into a toroidal shape a cylindrical green tire composed of a side wall rubber layer 6 stuck on a carcass ply 1, sticking a belt layer 3 thereon, and thereafter joining a crown part tread rubber layer 4a and a side edge rubber layer 5 with said side part rubber layer 6. Then, an annular groove 8 for moderating the stress is formed in the tire radial direction at lower and upper portions of circular boundary line A appearing when the joint surface between the side wall rubber layer 6 and the side edge rubber layer 5 intersects the outer surface of the tire. An interval L between said annular grooves 8, 8 is made to be 5-30mm., groove width W of each of the grooves 8 to be 2-10mm. and depth D is made to be 20-50% of thickness SW of the rubber layer 6 at the boundary line A.
Bibliography:Application Number: JP19830146162