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AssigneeThe Goodyear Tire & Rubber Company
InventorsRene L. Bormann, Antonnis G. Maathuis, Jurgen Spielmann, Theo Meijer, Klaus Beer, Thomas R. Oare
Estimating the term…
A pneumatic tire (1) comprises a radial carcass (2), a tread portion (7) and a belt reinforcing structure (8) extending circumferentially around the carcass (2). Disposed radially outwardly of the belt reinforcing structure (8) is a textile reinforced overlay structure (9) having substantially circumferentially extending cords (10). The overlay structure (9) is composed of a series of helical convolutions of a textile ribbon (11) whereby adjacent helical convolutions of the textile ribbon (11) overlap. There is further disclosed a method of applying multiple layers of a single continuous helically wound textile ribbon (11) in a single continuous operation from one axial side to the other axial side of the belt reinforcing structure (8).
A pneumatic tire comprising a radial carcass, a tread portion and a belt reinforcing structure comprising steel cords which has a pair of axial edges and is radially interposed between the carcass and the tread portion, a textile reinforced overlay structure being radially interposed between the belt reinforcing structure and the tread portion, the overlay structure comprising a single continuous ribbon helically wound about the belt reinforcing structure and extending between the axial edges of the belt reinforcing structure, said ribbon comprises an elastomeric material reinforced by cords of a heat shrinkable material arranged side by side and extending longitudinally of the ribbon with adjacent turns of the ribbon being in an overlapping relationship, said ribbon and cords being disposed at 0.degree. to 5.degree. with respect to a mid-circumferential plane of the tire, the cords of the overlay structure being oriented in a direction opposite to the direction of the steel cords of a radially outermost belt layer of the belt reinforcing structure such that the cords of the overlay structure are in a crossing relationship with the steel cords of the radially outermost belt layer of the belt reinforcing structure, and said overlay structure comprising a center portion and a pair of axially outer portions with the width of the overlap of adjacent turns of aid ribbon being greater in the axially outer portion than in the center portion.
A pneumatic tire as claimed in either claim 1 or 5 wherein the axial width of the overlay structure is equal to the axial width of the belt reinforcing structure.
A pneumatic tire as claimed in either claim 1 or 5 wherein the axial width of the overlay is greater than the axial width of the belt reinforcing structure.
A pneumatic tire as claimed in either claim 1 or 5 wherein the width of the ribbon is in the range of 10 to 40 mm.
A pneumatic tire as claimed in either cliam 1 or 5 wherein the thickness of the ribbon is in the range of 0.4 to 1.2 mm.
A method of manufacturing a radial tire comprising the step of placing a textile reinforced overlay structure around the radial outer periphery of a belt reinforcing structure by helically winding an elastomeric ribbon, which is reinforced by cords of a heat shrinkable material arranged side by side and extending longitudinally of the ribbon, from one axial side to the other axial side of the belt reinforcing structure while applying each spiral convolution of the ribbon in overlapping relationship with its respective adjacent spiral convolutions in such a way that the ribbons and cords are disposed at 0.degree. to 5.degree. with respect to a mid-circumferential plane of the tire and the cords of the overlay structure being oriented in a direction opposite to the direction of the steel cords of a radially outermost belt layer of the belt reinforcing structure such that the cords of the overlay structure are in a crossing relationship with the steel cords of the radially outermost belt layer of the belt reinforcing structure, and the axial width of the overlay between adjacent convolutions of the ribbon is greater in axially outer portions of the overlay structure than in a center portion of the overlay structure.
A method as claimed in claim 21 wherein the ribbon has a thickness in the range of 0.4 to 1.2 mm.
Dependencies are inferred from the claim text.