Vehicle tires

Abstract

The present invention relates to a vehicle tire (1), in particular a pneumatic vehicle tire, comprising sidewalls (2), a tread (3) and at least one hatched surface (4) on at least one of the sidewalls (2) and / or on the tread (3), in which the hatched surfaces (4) extend alongside one another and in a longitudinal extension direction (E R The vehicle tire (1) has elongated hatching ribs (5) each having a regular wave shape when viewed in a plan view and a longitudinal extension direction (E R ) or the longitudinal direction of the isosceles trapezoidal shape without a base (E R ) and two additional ribs (6) with free ends are formed on the hatching rib reference line (b) which extends along the base of the trapezoid in the hatching rib (5) or along the chord of the arc. SR ) are arranged on the side from each rib portion (5a).

Description

[Technical Field]

[0001] The present invention relates to a vehicle tire, in particular a pneumatic vehicle tire, having sidewalls and a tread and having at least one hatched area on at least one of the sidewalls and / or on the tread, wherein the hatched areas have elongated hatching ribs extending alongside one another and having longitudinal extension directions that extend parallel to one another or substantially parallel to one another. [Background technology]

[0002] The hatched areas are typically stamped onto the outside of the tire during vulcanization by a shape-imparting vulcanization mold that has a negative contour of the respective hatched area on the mold surface. The surface elements that form the hatched areas or structured hatched areas can be created on an already vulcanized tire by material removal, by engraving, or by additive processes.

[0003] The main purpose of the hatched areas formed on the sidewalls or shoulder sides of vehicle tires is to create a contrast with the existing smooth surface areas on the sidewalls or shoulder sides of vehicle tires, so that, for example, letters, graphic elements, company logos, other identifiers, etc., placed on the sidewalls are optically highlighted, with particular attention paid to good visibility and distinguishability. The same applies to hatched areas placed on the groove sides of grooves in the tread. In this case, the hatched areas may be part of, or may completely or partially surround or enclose, the letters, graphic elements, company logos, or other identifiers. Hatched areas can also be used to hide unevenness associated with the design on the sidewalls.

[0004] Vehicle tyres of the type mentioned at the outset, which have hatched areas on the sidewalls and in which the hatching ribs run alongside one another, are known, for example, from EP 2502758 A1 and DE 102008010486 A1.

[0005] The scattering of light on the side surfaces of the hatching ribs reduces the reflectivity of light on the tire surface, thereby changing the brightness effect of the hatched areas, which usually appear darker than a substantially smooth surface area without the hatched areas. In particular, hatched areas consisting of parallel-extending hatching ribs can be very effectively engraved, for example, by a laser, as a negative contour on the mold surface of a vulcanization mold for shaping and vulcanizing a vehicle tire, and then stamped with good quality into the rubber material during tire vulcanization, but their contrast effect is highly dependent on the direction of light incidence. Therefore, the contrast may suddenly decrease at certain viewing angles. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention is therefore based on the object of influencing, in particular improving, the contrast effect of hatched areas with hatching ribs in all light conditions and at all light angles of incidence in the case of vehicle tires of the type mentioned at the beginning, in a targeted manner and in a process that finds a good compromise between improved contrast effect and at the same time effective productivity in terms of tire curing molds. [Means for solving the problem]

[0007] The above object is achieved by a vehicle tire according to claim 1, a vulcanization mold according to claim 14, and a method according to claim 15.

[0008] The vehicle tire according to the present invention is characterized in that the hatching ribs are each composed of rib portions which, when viewed in plan view, extend in a regular wave-like pattern and are adjacent to one another and extend like an isosceles trapezoid without a lower base oriented correspondingly in the longitudinal direction of extension, or like an arc oriented correspondingly in the longitudinal direction of extension, and two additional ribs with free ends branch off from each rib portion on the side where the hatching rib reference line is located, which extends along the lower base of the trapezoid or along the chord of the arc.

[0009] The wavy hatching ribs according to the present invention, together with the additional ribs, extend in different directions and provide multiple rib sides along which light incident from all possible directions is scattered, reflected multiple times, and absorbed, so that a particularly high contrast effect is achieved. Thus, at all viewing angles, the hatched areas appear particularly dark and contrast-rich. In addition, a shadow effect is created that promotes a clear emphasis of the hatched areas, especially on the black rubber of vehicle tires.

[0010] Contrast measurements performed by the inventors using Ulbricht spheres demonstrate the excellent contrast effect of the hatched areas. In each case, the contrast value was determined by comparing the measured black value of the hatched area with that of the surrounding smooth area. A contrast value of approximately 2.7 was observed for the hatched areas designed according to the present invention. In contrast, a typical standard hatched area resulting from a negative contour milled into the mold surface of a vulcanization mold has a contrast value of approximately 1.3 to 1.5.

[0011] A first preferred embodiment is characterized in that the additional ribs branching off from the same rib section extend V-shaped relative to one another in plan view and at opposite inclinations to one another in the longitudinal extension direction of the hatching rib, and approach one another in the direction of the hatching rib, so that the contrast effect of the hatching rib is further improved at all viewing angles, regardless of the direction of light incidence.

[0012] In this preferred embodiment, it is advantageous if the additional ribs branching off from the same rib portion are correspondingly inclined with respect to the longitudinal extent of the hatching rib when viewed in plan view, which further improves the scattering of light at the hatching rib.

[0013] Furthermore, in this preferred embodiment, it is advantageous if the V-shaped extending additional ribs form an angle of 15° to 25°, in particular 18° to 22°, relative to one another, which ensures a particularly advantageous "density" of the additional ribs in terms of light scattering in the additional ribs.

[0014] A further preferred embodiment is characterized in that additional ribs branching off from the same rib portion adjoin each hatching rib at a mutual distance, which contributes to a further increase in the contrast value of the hatched areas.

[0015] According to a further preferred embodiment, the additional ribs, when viewed in plan, pass through the hatching rib reference line, and each additional rib preferably has a first additional rib portion extending from the hatching rib reference line to the hatching rib when viewed in plan, and a second additional rib portion adjacent to the first additional rib portion and configured to be longer than the first additional rib portion. The additional ribs therefore protrude significantly from the hatching rib, which is also favorable for the contrast value.

[0016] The additional ribs preferably have a width that continuously decreases towards the hatching rib, so that, during vulcanization of the tire, the interconnection areas of each additional rib to the hatching rib are formed in a particularly faithfully detailed and accurate manner, which further improves the contrast effect.

[0017] In a further preferred embodiment, the rib portions extend like an isosceles trapezoid without a bottom base, such that each rib portion is composed of a rib portion element forming the upper base of the trapezoid and two rib portion elements forming the legs of the trapezoid, with one additional rib extending from the interconnection region of the rib portion elements forming the upper base of the trapezoid in the rib portion element forming one leg of the trapezoid, and the other additional rib extending from the interconnection region of the rib portion elements forming the upper base of the trapezoid in the rib portion element forming the other leg of the trapezoid. In this embodiment as well, the interconnection region of each additional rib to the hatching rib is formed in a particularly faithful, detailed, and accurate manner during tire vulcanization, thereby further improving the contrast effect.

[0018] According to a further preferred embodiment, the additional ribs each have an extension length of 0.30 mm to 0.50 mm, in particular 0.35 mm to 0.45 mm.

[0019] Furthermore, the rib portions of all hatching ribs are oriented in a corresponding manner relative to the longitudinal extension direction and therefore point in a corresponding direction relative to the longitudinal extension direction, which favors a contrast effect, and this allows the hatching ribs to be arranged particularly densely while also allowing for faithful detailed design.

[0020] A further preferred embodiment is characterized in that adjacently extending hatching ribs have a mutual spacing of at least 0.50 mm, in particular at most 0.80 mm, determined perpendicularly to the hatching rib reference line, based on the hatching rib reference line.

[0021] An equally preferred embodiment, which further improves the contrast effect, is characterized in that hatching ribs which run directly alongside one another are offset from one another in their longitudinal extension direction.

[0022] In a particularly preferred variant, the first preferred embodiment is combined with the last-mentioned preferred embodiment in such a way that the hatching ribs extending directly next to one another are offset from one another in their longitudinal extension direction, respectively, when viewed in plan view: - for each intermediate hatching rib having two adjacently extending hatching ribs, the parallel-extending additional ribs forming one leg of the V-shape extend in alignment with the corresponding additional rib from one adjacent hatching rib, and the parallel-extending additional rib forming the other leg of the V-shape extend in alignment with the corresponding additional rib from the other adjacent hatching rib; and - For each edge-side hatching rib that has one adjacently extending hatching rib, only the parallel-extending additional ribs that form one leg of the V-shape extend in alignment with the corresponding additional rib from the adjacent hatching rib.

[0023] A further preferred embodiment is characterized in that between the additional ribs branching off from the same rib section, one independent peg-like ridge is formed, each having a maximum height of 0.05 mm to 0.80 mm, in particular 0.10 mm to 0.50 mm, which maximum height of the peg-like ridge is preferably smaller than that of the additional rib and / or which maximum height of the peg-like ridge is preferably smaller than that of the hatching rib, so that the peg-like ridge occupies the corresponding free space in the area between the additional ribs, which likewise improves the contrast effect.

[0024] The present invention further relates to a vulcanization mold for shaping and vulcanizing a vehicle tire according to any one of claims 1 to 14, wherein the vulcanization mold has at least one mold surface having a negative contour of a hatched area with elongated hatching ribs extending alongside one another and having longitudinal extension directions extending parallel to one another or substantially parallel to one another, The negative contour - first recesses for forming hatching ribs, each of said hatching ribs being composed of rib portions which, when viewed in plan, extend in a regular wave pattern and which are adjacent to one another and extend like an isosceles trapezoid without a lower base oriented correspondingly relative to the longitudinal extension direction, or like an arc oriented correspondingly relative to the longitudinal extension direction; - a second recess for forming two additional ribs with free ends branching off from each rib portion on the side where the hatching rib reference line extending along the lower base of the trapezoid or along the chord of the arc is located; It has.

[0025] The present invention further relates to a method for manufacturing a vehicle tire according to any one of claims 1 to 14, said method comprising: a) engraving a negative contour for forming a hatched area on a mold surface of a vulcanization mold for shaping and vulcanizing a vehicle tire by laser engraving, the negative contour comprising: - first recesses for forming hatching ribs, each of said hatching ribs being composed of rib portions which, when viewed in plan, extend in a regular wave pattern and which are adjacent to one another and extend like an isosceles trapezoid without a lower base oriented correspondingly relative to the longitudinal extension direction, or like an arc oriented correspondingly relative to the longitudinal extension direction; - a second recess for forming two additional ribs with free ends branching off from each rib portion on the side where the hatching rib reference line extending along the lower base of the trapezoid or along the chord of the arc is located; and b) carrying out shaping vulcanization of the tire blank by means of a vulcanization mold, whereby hatching areas with hatching ribs and additional ribs are stamped into the outer surface of the vehicle tire, in particular into the sidewall and / or tread of the vehicle tire; Includes:

[0026] Further features, advantages and details of the invention will now be explained in more detail on the basis of the drawings which show, in a schematic manner, exemplary embodiments of the invention. [Brief explanation of the drawings]

[0027] [Figure 1] 1 shows a diagram of a vehicle tire with hatched areas. [Figure 2] 1 shows a schematic enlarged plan view of a detail of a hatched area according to a variant of the first embodiment of the invention, in which the longitudinal portion of the hatched rib is visible; [Figure 3] 3 shows a schematic perspective view of some of the details of FIG. 2; [Figure 4] FIG. 3 shows a schematic perspective view of some of the details of FIG. 2. The perspective view is based on a scan made by an electron microscope. [Figure 4a] Figure 4 shows a photographic image of the relevant scan. [Figure 4b] FIG. 4b shows a plan view of a portion of the image of the scan of FIG. 4a. [Figure 5] 4, 4a and 4b are cross-sections taken along line VV, the cross-sections being based on scans. [Figure 6] 1 shows a schematic enlarged plan view of a detail of a hatched area according to a variant of the second embodiment of the invention, in which the longitudinal portion of the hatched rib is visible; [Figure 7] FIG. 7 shows a perspective view of a part of the detail of FIG. 6. The perspective view is based on a scan made by an electron microscope. [Figure 7a] Figure 7 shows a photographic image of the relevant scan. DETAILED DESCRIPTION OF THE INVENTION

[0028] 1 shows a circumferential portion of a vehicle tire 1 with a sidewall 2, a tread 3, and hatched areas 4 (shown) on the outer side of one sidewall 2 and on the tread 3. The vehicle tire is preferably a pneumatic vehicle tire, in particular a pneumatic vehicle tire for cars, vans, SUVs, light trucks, utility vehicles, motorcycles, buses, or bicycles. The hatched areas 4 are areal elements embodied in any desired external configuration, for example as images, logos, or letters. The hatched areas 4 may also be formed on the groove sides and / or groove bottoms of grooves formed in the tread 3, or on the tread relief, i.e., on the shoulder sides extending to the sidewall outside the shoulder-side ground contact area.

[0029] As shown in FIGS. 2 and 3, the hatched areas 4 extend side by side with one another and extend in the longitudinal direction E R The hatching rib 5 has an elongated shape with a longitudinal extension direction E (FIG. 2), which extends in a regular wave pattern when viewed in a plan view (FIG. 2). R is a straight line, but may preferably extend in an arc or wave shape as a whole.

[0030] In the following, we will first explain the ideal form of the hatched area 4 and the associated hatching rib 5 (shown in Figures 2 and 3), and then discuss the differences from the form of the hatched area 4 actually seen in vehicle tires (shown in Figures 4, 4a, 4b, and 5).

[0031] According to FIG. 2, the hatching ribs 5 are each arranged in a longitudinal direction E R Hatching rib reference line b extending to SR and the hatching rib reference line b SR Based on this, the maximum deflection a of the waveform, which corresponds to twice the amplitude of the waveform, is confirmed. Furthermore, each hatching rib 5 has a hatching rib center line m that follows the outline of the hatching rib 5 in a plan view. SR and when viewed in plan, extends like an isosceles trapezoid without a lower base, and has a longitudinal extension direction E RIn an exemplary embodiment, the rib portions 5a of all the hatching ribs 5 are arranged in the longitudinal direction E. R and thus in the longitudinal direction E R The hatching rib reference line b SR extends along the missing lower base of the trapezoid and is the center line of the hatching rib m SR Therefore, the rib portion 5a is formed by extending it in the longitudinal direction E R Each rib portion 5a extends linearly in a plan view and is parallel to the longitudinal direction E. R and two rib subelements 5a2 that extend linearly in a plan view and form the legs of the trapezoid.

[0032] Due to the profile of the hatching rib 5, the mutually adjacent rib sub-elements 5a2 belonging to different rib portions 5a and forming the legs of the trapezoid respectively form one inner corner region 5b and one pointed outer corner region 5c at their mutual junctions, and in the inner corner region 5b, the rib sub-elements 5a2 are aligned with each other along the hatching rib center line m SR based on the internal angle α of 80° to 120°, in particular 85° to 110°, preferably at most 95°.

[0033] The rib portions 5a are each located on the hatching rib reference line b SR Spread length e of 0.40mm to 1.00mm, especially 0.50mm to 0.80mm a The rib sub-elements 5a1 are each formed on a hatching rib center line m SR The spread length e observed along a1 (in the case of the rib subelement 5a1) and the spreading length e a2 (in the case of the rib subelement 5a2), and has an extension length e a1 is preferably 0.15 mm to 0.40 mm, in particular at most 0.30 mm, preferably 0.20 mm to 0.25 mm, and preferably the spreading length ea2 is the spreading length e a1 or a maximum of 0.05 mm in spread length e a1 The inner angle α is set to be different from the angle α.

[0034] As shown in FIGS. 2 and 3, the hatching rib reference line b SR On the side where the hatching rib reference line b (Fig. 2) is located, the hatching rib reference line b extends linearly in a plan view and V-shaped relative to each other. SR Two additional ribs 6 branch off from each rib portion 5a (FIG. 2) with their free ends passing through (FIG. 2), one additional rib 6 extending from the interconnection region of the rib portion element 5a1 with the rib portion element 5a2 forming one leg of the trapezoid, and one additional rib 6 extending from the interconnection region of the rib portion element 5a1 with the rib portion 5a2 forming the other leg of the trapezoid. With regard to the V-shaped shape, the tip of the V is thus replaced by the rib portion element 5a1 extending between the respective additional ribs 6 extending V-shaped relative to one another. According to FIG. 2, the additional ribs 6, together with the rib portions 5a, form a rib that extends in the longitudinal direction E R The additional ribs 6 can be made to correspond to each other by being displaced parallel to the hatching rib center line m SR Rib centerline m Z and rib center line m Z The spread length e is 0.30mm to 0.50mm, especially 0.35mm to 0.45mm. Z and the rib center line m in the plan view Z The width of the hatching rib 5 is continuously reduced up to the hatching rib 5. The additional ribs 6 branching off from the same rib portion 5a are aligned in the longitudinal direction E. R are inclined oppositely to each other in the longitudinal direction E R Rib center line m Z The mutual distance a determined between them based on Z increases continuously as the distance from the rib subelement 5a1 increases, and the additional ribs are spaced apart from each other by the rib center line m ZPreferably, the additional rib 6 is arranged such that it forms an angle β of 15° to 25°, in particular 18° to 22°, based on the longitudinal extension direction E when viewed in a plan view. R Each of the additional ribs 6 is inclined to a corresponding extent (at an angle of a corresponding size) relative to the hatching rib reference line b when viewed in plan view. SR The rib has a first additional rib portion 6a extending from the first additional rib portion 6a to the hatching rib 5, and a second additional rib portion 6b adjacent to the first additional rib portion 6a and configured to be longer than the first additional rib portion 6a.

[0035] Therefore, in each hatching rib 5, the additional ribs 6 extend parallel to each other in a plan view, and the longitudinal extension direction E R and additional ribs 6 which are inclined oppositely to these additional ribs 6 with respect to the axial direction of the ribs 6 and which also extend parallel to one another in plan view.

[0036] Spread length e a1 , e a2 If the corresponding spread length e Z is particularly preferably the spreading length e a1 , e a2 is at least 0.10 mm larger than

[0037] Spread length e a1 is the spread length e a2 If different from e, the spread length Z is particularly preferably two spreading lengths e a1 , e a2 at least 0.10 mm larger than the larger of

[0038] The hatching ribs 5 extending side by side within the hatched area 4 are aligned in their longitudinal direction E RThe offset is preferably configured such that, when viewed in plan, for each intermediate hatching rib 5 having two adjacently extending hatching ribs 5, one set of parallel-extending additional ribs 6 extend in alignment with the corresponding additional ribs 6 from one adjacent hatching rib 5, and the other set of parallel-extending additional ribs 6 extend in alignment with the corresponding additional ribs 6 from the other adjacent hatching rib 5. Thus, for each edge-side hatching rib 5, only one set of parallel-extending additional ribs 6 extend in alignment with the corresponding additional ribs 6 from the adjacent hatching rib 5.

[0039] The adjacent hatching ribs 5 are aligned along the hatching rib reference line b SR Based on the Hatching Rib reference line b SR The mutual spacing a is at least 0.50 mm, in particular at most 0.80 mm, as determined perpendicular to SR It has.

[0040] According to Fig. 3, the hatching rib 5 is preferably arranged on a hatching base 7, which is for example the bottom of a flat recess formed in the tire sidewall 2 (Fig. 1). The hatching rib 5 is thus a protuberance extending from the hatching base 7, i.e. formed on the hatching base 7, with a trapezoidal, triangular or triangular cross section having a tip region 8a and two rib flanks 8b that drop towards the hatching base 7, each extending at an acute angle γ of up to 10°, in particular 2° to 10°, preferably 3° to 5°, with respect to a vertical plane to the hatching base 7, and merging into the hatching base 7 via a bend or rounded section. Furthermore, the hatching rib 5 has a maximum height h of 0.10 to 0.80 mm, preferably 0.20 to 0.50 mm, particularly preferably 0.25 to 0.35 mm. SR(height at highest point), said maximum height being measured perpendicular to the hatching base 7. The tip region 8a is in the form of a flat portion having a width of 0.05 mm to 0.10 mm and extending continuously across the entire hatching rib 5. In an alternative embodiment, the tip region 8a is a rounded portion between the upper ends of the rib sides 8b.

[0041] The additional rib 6 has a trapezoidal, triangular, or triangular cross section corresponding to the hatching rib 5, and has a tip region 9a and a rib side 9b that also includes the above-mentioned angle γ (not shown) with a plane perpendicular to the hatching base 7 and transitions to the hatching base 7 via a bend or rounded portion. The additional rib 6 has a maximum height h as seen perpendicular to the hatching base 7. Z and has a maximum height h Z is the maximum height h of the hatching rib 5 SR The additional ribs 6 have, at their free ends, end flanks 9c, which in the illustrated exemplary embodiment are surfaces that drop obliquely in the direction of the hatching base 7 at an angle of up to 5° as seen with respect to a reference line that is arranged perpendicular to the hatching base 7, or that are preferably aligned perpendicular to the hatching base 7 in the direction of extension E R (See FIG. 1) In an alternative embodiment (not shown), end sides 9c are generally in the form of rounded portions between rib sides 9b.

[0042] Figure 4 shows a schematic perspective view of hatched area 4, Figure 4a shows a perspective view of a scan of hatched area 4 made by electron microscopy, and Figure 4b shows a plan view of a portion of the scan of Figure 4a. Figure 5 shows a cross section along line VV of Figures 4, 4a, and 4b.

[0043] In comparison with the ideal form of the hatched area 4 shown in Figures 2 and 3, the hatched area 4 actually found in a tire such as that shown in Figures 4, 4a, and 4b is characterized by irregularities extending throughout the entire hatched area 4 and caused by the manufacturing process, the latter of which will be described later. Here, the hatched base 7 has an irregular roughness covering the area (Figures 4a, 4b, 5), and the rib sides 8b, 9b and end sides 9c each have an irregular, slightly wavy undulation. Thus, the rib sides 8b, 9b and end sides 9c are substantially flat, unstructured surfaces. Furthermore, the tip regions 8a, 9a (Figures 4, 4a) are characterized by irregular and very small variations in height, resulting in a maximum height h SR , h Z (Figure 3) is subject to certain fluctuations.

[0044] 4b and 5 show several measurement points M, where the maximum heights are determined perpendicular to the hatching base 7. i,i=1~5 This shows:

[0045] As shown in Figure 5, the maximum heights of the tip regions 8a, 9a (Figure 4) relative to the adjacent lowest levels of the hatched base 7 are different in the illustrated cross section. In Figure 5, the maximum heights determined relative to the lowest level of the hatched base 7 on the left side are indicated by *. The following maximum heights were measured in the illustrated cross section: h1=0.276mm h2=0.293mm h2 * =0.291mm h3 * =0.270mm h4=0.283mm h5=0.288mm h5 * =0.268mm

[0046] Irregularities caused by the manufacturing process result in a "constant" maximum height that varies within intervals of up to 0.03 mm.

[0047] 6 and 7 show details of hatched area 4', which is a variation of hatched area 4. Hatched area 4' differs from hatched area 4 in that in the region of each hatching rib 5, one independent, generally peg-shaped protuberance 10 is formed between the additional ribs 6 that extend V-shaped relative to each other. The peg-shaped protuberance 10 has a maximum height h of 0.05 mm to 0.80 mm, in particular 0.10 mm to 0.50 mm. E (Fig. 7) and has a maximum height h E is preferably the maximum height h of the additional rib 6 Z (Fig. 3) and the maximum height h of the hatching rib 5 SR (Fig. 3) Fig. 7a shows a perspective view of a scan of the hatched area 4' made by electron microscopy.

[0048] A method for manufacturing a pneumatic vehicle tire having hatched area 4 is discussed below.

[0049] The hatched area 4 is produced on the surface of the vehicle tire 1, for example on the sidewall 2, during shaping and vulcanization of the vehicle tire 1. For this purpose, the vulcanization mold used has a mold surface which includes the negative contour of the hatched area 4 to be produced.

[0050] A method for manufacturing a vehicle tire 1 includes the steps of: a) engraving a negative contour for forming a hatched area 4 on a mold surface of a vulcanization mold for shaping and vulcanizing a vehicle tire 1 by laser engraving, a step in which the negative profile has a first recess for forming the hatching rib 5 and a second recess for forming the additional rib 6; c) carrying out a shaping vulcanization of the tire blank by means of a vulcanization mold, whereby hatching areas 4 with hatching ribs 5 and additional ribs 6 are stamped into the outer surface of the vehicle tire, in particular into the sidewall and / or tread of the vehicle tire; Includes:

[0051] The invention is not limited to the exemplary embodiments described.

[0052] The hatching ribs of the hatched areas extending side by side also extend in the longitudinal direction E R The rib portions of the hatching rib may extend without offset or offset from each other in any desired manner in the longitudinal direction E when viewed in plan view. R , and two additional ribs with free ends branch off from each rib portion on the side where the hatching rib reference line is located, which extends along the chord of the arc in the hatching rib.

[0053] The hatched ribs and additional ribs may have cross-sectional shapes different from those described. The hatched ribs and additional ribs preferably have cross-sectional shapes that are symmetrical with respect to a plane perpendicular to the hatched base. The rib flanks may extend convexly or concavely curved over the entire area or at least over a large portion of their extent, the transition to the hatched base being realized via a bend or a rounded section, and the aforementioned angle β is the angle between the straight lines connecting the end points of the curved rib flanks. Furthermore, the rib flanks may have a stepped form, and the angle β between the straight lines connecting the two ends of the rib flanks is determined. Furthermore, the rib flanks may be structured, i.e., provided with a surface structure, for example by roughness, so as to have extremely small structures.

[0054] The hatching ribs may extend substantially parallel to one another in plan view with respect to their longitudinal extension direction, and "hatching ribs extending substantially parallel to one another" is understood to mean that the extension directions differ from one another by a maximum of 5°.

[0055] Furthermore, the hatching ribs may extend in an arc in plan view relative to their longitudinal extension direction. In the case of hatching ribs that extend substantially parallel to one another and each extend in an arc, the angle at which the extension directions of the hatching ribs may differ from one another is determined by the angle between the respective hatching rib reference lines b SR Based on the tangent to [Explanation of symbols]

[0056] 1. Vehicle tires 2 Sidewall 3 Tread 4, 4' hatch area 5 Hatching Ribs 5a Rib part 5a1 rib part element 5a2 rib part element 5b Inner corner area 5c Outer corner area 6 additional ribs 6a Additional rib part 6b Additional rib part 7 Hatching base 8a Tip area 8b Rib side 9a Tip area 9b Rib side 9c End side 10 Ridges a Maximum swing a SR , a Z interval b SR Hatching rib reference line e a , e a1 , e a2 , e Z Spread length E R Longitudinal spreading direction h E , h SR , h Z Maximum height h1, h2, h4, h5 max height h2 * , h3 * , h5 * Maximum height M i,i=1~5 Measurement point m SR Hatching rib centerline m Z Rib Centerline α inside angle β, γ angles

Claims

1. A vehicle tire (1), in particular a pneumatic vehicle tire, having sidewalls (2) and a tread (3), with at least one hatched area (4) on at least one of said sidewalls (2) and / or on said tread (3), wherein said hatched areas (4) extend alongside one another and in a longitudinal extension direction (E) that extends parallel to one another or substantially parallel to one another. Ｒ A vehicle tire (1) having an elongated hatching rib (5) having The hatching ribs (5) extend in a regular wave shape when viewed in a plan view, and are adjacent to each other, and the longitudinal extension direction (E Ｒ ) or extends like an isosceles trapezoid with no lower base oriented correspondingly with respect to the longitudinal extension direction (E Ｒ ) and a hatching rib reference line (b) extending along the bottom of the trapezoid of the hatching rib (5) or along the chord of the arc. ＳＲ 1. A vehicle tyre (1) characterized in that two additional ribs (6) with free ends branch off from each rib portion (5a) on the side where the rib portion (5b) is located.

2. The additional ribs (6) branching off from the same rib portion (5a) are V-shaped relative to each other when viewed in plan view and in the longitudinal direction (E Ｒ 2. A vehicle tyre (1) according to claim 1, characterized in that the hatching ribs (5) extend at opposite inclinations to each other relative to the tyre edge (1) and approach each other in the direction of the hatching rib (5).

3. The additional rib (6) branching off from the same rib portion (5a) extends in the longitudinal direction (E Ｒ 3. A vehicle tyre (1) according to claim 2, characterized in that it is inclined correspondingly to the axial direction of the tyre.

4. 4. Vehicle tyre according to claim 2 or 3, characterized in that the additional ribs (6) extending V-shaped relative to one another form an angle (β) of between 15° and 25°, in particular between 18° and 22°.

5. 5. A vehicle tyre (1) according to any one of claims 1 to 4, characterized in that the additional ribs (6) branching off from the same rib portion (5a) adjoin the respective hatching rib (5) at a mutual distance.

6. The additional rib (6) is aligned with the hatching rib reference line (b ＳＲ ) and each of the additional ribs (6) preferably passes through the hatching rib reference line (b ＳＲ 6. A vehicle tire according to claim 1, further comprising: a first additional rib portion (6a) extending from the first additional rib portion (6a) to the hatching rib (5); and a second additional rib portion (6b) adjacent to the first additional rib portion (6a) and configured to be longer than the first additional rib portion (6a).

7. A vehicle tyre according to any one of claims 1 to 6, characterized in that the additional rib (6) has a width that decreases continuously towards the hatching rib (5).

8. The rib portions (5a) extend like an isosceles trapezoid without a lower base, so that each rib portion (5a) has a rib portion element (5a) that forms the upper base of the trapezoid. １ ) and two rib part elements (5a) each forming a leg of the trapezoid. ２ ) and one additional rib (6) is the rib part element (5a) that forms one leg of the trapezoid. ２ The rib part element (5a) forming the upper base of the trapezoid １ ) and the other additional rib (6) extends from the interconnection area of ​​the rib part element (5a) forming the other leg of the trapezoid. ２ The rib part element (5a) forming the upper base of the trapezoid １ 8. Vehicle tyre (1) according to any one of claims 1 to 7, characterized in that it extends from the interconnection area of ​​the tyre.

9. The additional ribs (6) each have an extension length (e Ｚ 9. A pneumatic vehicle tire according to claim 1, wherein the tyre comprises:

10. The rib portions (5a) of all the hatching ribs (5) are aligned in the longitudinal direction (E Ｒ ) and thus oriented in the longitudinal direction (E Ｒ 10. Vehicle tyre according to claim 1, characterized in that it points in a corresponding direction to the axial direction of the tyre.

11. The hatching ribs (5) extending adjacent to each other are aligned with the hatching rib reference line (b ＳＲ ) and based on the hatching rib reference line (b ＳＲ ) perpendicular to the distance (a) of at least 0.50 mm, in particular at most 0.80 mm Ｒ 11. The vehicle tire according to claim 1, wherein the tread is a tread having a thickness of 100 μm or less.

12. The hatching ribs (5) extending directly next to each other are spaced apart in their longitudinal extension direction (E Ｒ 12. Vehicle tire according to claim 1, characterized in that the axially extending portions of the tyre are offset from one another in the axial direction.

13. The hatching ribs (5) extending directly next to each other are spaced apart in their longitudinal extension direction (E Ｒ ) are offset from each other when viewed in plan view. - for each intermediate hatching rib (5) having two adjacently extending hatching ribs (5), the parallel extending additional ribs (6) forming one leg of the V-shape extend in alignment with the corresponding additional rib (6) from one adjacent hatching rib (5), and the parallel extending additional rib (6) forming the other leg of the V-shape extend in alignment with the corresponding additional rib (6) from the other adjacent hatching rib (5); and A vehicle tyre according to claim 2 or 12, characterized in that for each edge-side hatching rib (5) having one adjacently extending hatching rib (5), only the parallel-extending additional ribs (6) forming one leg of the V-shape extend in alignment with the corresponding additional rib (6) from the adjacent hatching rib (5).

14. Between the additional ribs (6) branching off from the same rib portion (5a), there is a maximum height (h) of 0.05 mm to 0.80 mm, in particular 0.10 mm to 0.50 mm. Ｅ ) of the peg-shaped protrusions (10) are formed, and Ｅ ) is preferably the maximum height (h Ｚ ) and / or the maximum height of the peg-like protuberances (10) is smaller than (h Ｅ ), preferably the maximum height (h ＳＲ 14. Vehicle tire according to claim 1, characterized in that the axial length of the tyre is smaller than 1 / 2 sq.m.

15. A vulcanization mold for shaping and vulcanizing a vehicle tire (1) according to any one of claims 1 to 14, wherein the vulcanization molds extend side by side and extend parallel to one another or approximately parallel to one another in longitudinal extension directions (E Ｒ 1. A vulcanization mold having at least one mold surface having a negative contour of a hatched area (4) with an elongated hatching rib (5) having a The negative contour is - first recesses for forming hatching ribs (5), said hatching ribs each extending in a regular wave pattern when viewed in plan and adjacent to one another, in said longitudinal direction (E Ｒ ) or extends like an isosceles trapezoid with no lower base oriented correspondingly with respect to the longitudinal extension direction (E Ｒ a first recess formed by an arcuately extending rib portion (5a) correspondingly oriented relative to the - hatching rib reference lines (b) extending along the lower base of the trapezoid or along the chord of the arc in the hatching rib (5) ＳＲ a second recess for forming two additional ribs (6) with free ends branching off from each rib portion (5a) on the side where the first rib portion (5b) is located; A vulcanizing mold characterized by having:

16. A method for manufacturing a vehicle tire (1) according to any one of claims 1 to 14, said method comprising: a) engraving a negative contour for forming a hatched area (4) on a mold surface of a vulcanization mold for shaping and vulcanizing the vehicle tire (1) by laser engraving, the negative contour comprising: - first recesses for forming hatching ribs (5), said hatching ribs each extending in a regular wave pattern when viewed in plan and adjacent to one another, in said longitudinal direction (E Ｒ ) or extends like an isosceles trapezoid with no lower base oriented correspondingly with respect to the longitudinal extension direction (E Ｒ a first recess formed by an arcuately extending rib portion (5a) correspondingly oriented relative to the - hatching rib reference lines (b) extending along the lower base of the trapezoid or along the chord of the arc in the hatching rib (5) ＳＲ a second recess for forming two additional ribs (6) with free ends branching off from each rib portion (5a) on the side where the rib portion (5b) is located; and b) carrying out a shaping vulcanization of the tire blank by means of said vulcanization mold, whereby hatched areas (4) with hatching ribs (5) and additional ribs (6) are stamped on the outer surface of said vehicle tire, in particular on the sidewall and / or on the tread of said vehicle tire; A method comprising:

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