Tire comprising a high-contrast textured surface element

Abstract

The present invention relates to a tire (1) for a vehicle, comprising, on an outer surface (2), at least one high-contrast textured surface element (3) comprising a texture having cavities (4) recessed with respect to the outer surface (2) and two adjacent to each other so as to form a network of cavities, each cavity (41) having a depth H and opening onto the outer surface (2) through an opening (41), two adjacent openings (41) being separated by an interface zone (5) and being separated from each other by a pitch P, characterized in that the ratio H / P between the depth H of any cavity (4) and the pitch P between two adjacent cavities (4) is greater than or equal to 1 and in that any interface zone (5) between two adjacent openings (41) has a width Li, measured on the outer surface (2), less than or equal to 0.050 mm. Figure for the abstract: [Fig. 4]

Claims

Demands

1. A tire (1) for a vehicle, comprising, on an outer surface (2), at least one high-contrast textured surface element (3) comprising a texture having cavities (4) recessed with respect to the outer surface (2) and two adjacent to each other so as to form a network of cavities, each cavity (41) having a depth H, measured perpendicular to the outer surface (2), and opening onto the outer surface (2) through an opening (41) inscribed in a circle having a center O and a diameter D, two adjacent openings (41) being separated by an interface zone (5) and being separated from each other by a pitch P measured between their respective centers O, characterized in that the ratio H / P between the depth H of any cavity (4) and the pitch P between two adjacent cavities (4) is greater than or equal to 1 and in that any interface zone (5) between two adjacent openings (41) has a width Li,measured on the outer surface (2), less than or equal to 0.050 mm.

2. Pneumatic (1) according to claim 1, wherein the ratio H / P between the depth H of any cavity (4) and the pitch P between two adjacent cavities (4) is greater than or equal to 1.5, preferably greater than or equal to 2.

3. Pneumatic (1) according to any one of claims 1 or 2, wherein any interface area (5) has a width Li, measured on the outer surface (2), less than or equal to 0.030 mm, preferably less than or equal to 0.015 mm and even more preferably less than or equal to 0.010 mm.

4. Pneumatic (1) according to any one of claims 1 to 3, wherein the ratio H / P between the depth H of any cavity (4) and the pitch P between two adjacent cavities (4) is less than or equal to 3, preferably less than or equal to 2.

5.

5. Pneumatic (1) according to any one of claims 1 to 4, wherein two cavities (4) adjacent to each other are spaced apart by a pitch P less than or equal to 0.500 mm, preferably less than or equal to 0.300 mm.

6. Pneumatic (1) according to any one of claims 1 to 5, wherein the pitch P between two cavities (4) adjacent to each other is constant.

7. Pneumatic (1) according to any one of claims 1 to 6, wherein the ratio H / D between the diameter D of any opening (41) and the depth H of the corresponding cavity (4) is greater than or equal to 1, preferably greater than or equal to 1.

5.

8. Pneumatic (1) according to any one of claims 1 to 7, wherein any opening (41) has a diameter D greater than or equal to 0.050 mm, preferably greater than or equal to 0.100 mm.

9. Pneumatic (1) according to any one of claims 1 to 8, wherein any opening (41) has a diameter D less than or equal to 0.500 mm, preferably less than or equal to 0.300 mm.

10. Pneumatic (1) according to any one of claims 1 to 9, wherein any opening (41) has a circular or polygonal shape.

11. Pneumatic (1) according to claim 10, wherein any polygonal-shaped opening (41) has a hexagonal shape.

12. Pneumatic (1) according to any one of claims 1 to 11, wherein the cavities (4) have identical depths H.

13. Pneumatic (1) according to any one of claims 1 to 12, wherein every cavity (4) has an inclined inner wall (42) forming, with respect to the outer surface, an angle A at most equal to

14. OJ . Pneumatic (1) according to any one of claims 1 to 13, wherein every cavity (4) has a curved bottom.

15. Pneumatic (1) according to any one of claims 1 to 14, wherein the texture of the high-contrast textured surface element (3) has at least in part a first brightness L*1 less than or equal to 15, preferably less than or equal to 13, and even more preferably less than or equal to 10.

16. Pneumatic (1) according to claim 15, any portion of smooth surface (6) adjacent to the high contrast textured surface element (3) having a second brightness L*2, wherein the texture of the high contrast textured surface element (3) has at least in part a first brightness L*1 less than or equal to L*2-5, preferably less than or equal to L*2-10, and even more preferably less than or equal to L*2-12.

17. Tire (1) according to any one of claims 1 to 16, wherein at least one high contrast textured surface element (3) is positioned on an outer sidewall surface (21).

18. Tire (1) according to any one of claims 1 to 17, wherein at least one high contrast textured surface element (3) is positioned on an outer tread surface (22), in particular at the bottom of a tread groove.

19. Molding element (7) intended for shaping by molding a high contrast textured surface element (3) of a tire (1) according to any one of claims 1 to 18, the molding element comprising, on a molding surface, a texture (8) in negative complementary to the texture of the tire.

20. Molding element (7) according to claim 19 produced by laser engraving.

Images