• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a tire (1) of rubber material comprising a tread (2) and a sidewall (3), said tire comprising on the tread and / or said sidewall (3) a marking (4) which contrasts with said tread (2) and / or said sidewall (3). The tire (1) is characterized in that the marking (4) has a brightness, said first brightness (L * 1), between 0 and 15 and the tread (2) and / or the sidewall (3) presents a brightness, called second brightness (L * 2), globally greater than or equal to 18.
    公开号:FR3022851A1
    申请号:FR1456137
    申请日:2014-06-30
    公开日:2016-01-01
    发明作者:Olivier Muhlhoff；Jean Claude Desvignes；Xavier Bichon
    申请人:Michelin Recherche et Technique SA Switzerland ；Compagnie Generale des Etablissements Michelin SCA；Michelin Recherche et Technique SA France；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION [01] The present invention relates to a tire for a motor vehicle comprising a tread and a sidewall, said tire comprising on the tread and / or said side a contrasting marking. with said tread and / or said sidewall.
    [0002] STATE OF THE ART [02] Tires have a large amount of markings intended to give technical and legal information or to enable consumers to distinguish the origin of the product. [03] Markings contrasting with said tread and / or said sidewall are commonly used to visually highlight them with respect to said tread and / or said sidewall of the tire. [4] It is necessary to define sufficient contrast for the marking to be sufficiently visible with respect to said tread and / or said sidewall.
    [0003] DEFINITIONS [5] "Pneumatic" means all types of elastic bandages subjected to internal pressure or not. [06] "Rubber material" means a diene elastomer, that is to say in known manner an elastomer derived from at least in part (ie homopolymer or copolymer) of monomers dienes (monomers carrying two carbon-carbon double bonds, conjugated or not). [07] "Tread" of a tire means a quantity of rubber material delimited by lateral surfaces and by two main surfaces, one of which, called a tread surface, is intended to come into contact with a road surface. when the tire is rolling. [08] "sidewall" of a tire means a side surface of the tire disposed between the tread of the tire and a bead of the tire. [9] By "texture" is meant an organized arrangement of a plurality of elements, all or part of the elements of the arrangement being the repetition of the same base element, for example, a strand or a lamella . [10] "Strand" means a filamentary element whose height is at least equal to twice the diameter of a disc of the same area as the average section of the strand. [11] "Slats" means elongated strands having a length at least twice their height. [12] By "brightness" is meant the parameter that characterizes a surface to reflect more or less light. The luminosity is expressed on a scale from 0 to 100 according to the color model L * a * b established by the CIE (International Commission on Illumination). The value 100 represents white or total reflection; the value 0, black or total absorption. [13] By brightness of a tread and / or a sidewall "generally greater than a certain value" is meant that the average brightness of this tread and / or sidewall is greater than this value. By average brightness, we mean the brightness calculated on the whole of this tread and / or side excluding any marking having a brightness less than or equal to 15.
    [0004] SUMMARY OF THE INVENTION [14] The invention relates to a tire made of rubber material comprising a tread and a sidewall, said tire comprising on the tread and / or said sidewall a mark which contrasts with said tread. and / or said flank. The marking has a brightness, said first brightness, between 0 and 15 and said tread and / or said sidewall has a brightness, called second brightness, globally greater than or equal to 18. [15] By defining a range of values for the brightness of the marking, and for the tread and the sidewall, one makes sure to have a contrast consistent with a certain level of contrast that one wants to obtain. [16] In a nonlimiting variant embodiment, the first brightness is between 6 and 15. [17] This makes it possible to obtain an industrially feasible texture at a lower cost. [18] In a non-limitative embodiment, the first brightness is between 8 and 9. [19] Achieving the texture at the industrial level is easier to obtain a brightness in these values. [20] In a non-limiting embodiment, the second brightness is greater than or equal to 20. [21] This makes it possible to approach a certain level of white and thus to obtain a better contrast with the texture. [22] In a non-limiting embodiment, the marking is formed by a texture having a plurality of protuberant or recessed elements with respect to the tread and / or the sidewall. [23] This makes it possible to obtain a texture of "velvet" type whether at the level of the touch or at the visual level.
    [0005] BRIEF DESCRIPTION OF THE DRAWINGS [24] Other features and advantages of the invention will emerge from the following description, given by way of example, without being limiting in nature, with reference to the appended drawings, in which: FIG. perspective view of a portion of a tire comprising a tread and a sidewall, said sidewall comprising a marking according to the invention according to a first embodiment; - Figure 2 schematically shows a perspective view of a portion of a tire having a tread and a sidewall, said tread comprising a marking according to the invention according to a second embodiment; - Figure 3 shows different brightness values of the marking and the tread and the sidewall of Figures 1 and 2; FIG. 4 represents a part of a texture composing the marking of FIGS. 1 and 2, according to a first nonlimiting variant of a first embodiment of said texture according to which the texture has elements in protuberance; - Figure 5 shows a portion of a texture comprising the marking of Figures 1 and 2, according to a second non-limiting embodiment of a first embodiment of said texture according to which the texture has protruding elements; FIG. 6 represents a part of a texture composing the marking of FIGS. 1 and 2, according to a third nonlimiting variant of a first embodiment of said texture according to which the texture has elements in protuberance; - Figure 7 shows a portion of a texture comprising the marking of Figures 1 and 2, according to a fourth non-limiting embodiment of a first embodiment of said texture according to which the texture has protruding elements; FIG. 8 represents a part of a texture composing the marking of FIGS. 1 and 2, according to a second embodiment of said texture according to which the texture has elements in hollow; and FIG. 9 represents an enlarged view of a cavity of a recessed element of the texture of FIG. 8. [25] In the following description, substantially identical or similar elements will be designated by identical references. [26] In Figures 1 and 2 is shown a portion of the tire 1 having a tread 2 and a sidewall 3, said tire 1 comprising on the tread 2 and / or said sidewall 3 a marking 4 in contrast with the tread and / or said sidewall. [27] In a non-limiting example, the marking 4 is intended to provide technical and legal information or to allow consumers to distinguish the origin of the product. In another non-limiting example, the marking 4 is an aesthetic graphic element on the tire. [28] Figure 1 shows a portion of the tire 1 having a tread 2 and a sidewall 3 according to a first non-limiting embodiment. According to this mode, the flank 3 has on its surface 30 a marking 4 in contrast with the sidewall 3. The marking 4 thus extends over a portion of the sidewall 3. [29] FIG. 2 represents a part of the tire 1 comprising a tread 2 and a sidewall 3 according to a second non-limiting embodiment. The tread 2 has grooves 21 (also called tread patterns) and a tread surface 20 for contacting the ground. According to this mode, the tread 2 has on its tread 20 a marking 4 in contrast with the tread 2. The marking 4 thus extends over a portion of the tread 2. [30] In the two modes of Figures 1 and 2, the marking 4 has a brightness, said first brightness L * 1, between 0 and 15, as shown in Figure 3. [31] In this way, characterizing the brightness, we obtain a marking 4 which sufficiently absorbs the light and which is sufficiently in contrast with the tread 2 and / or said sidewall 3. [32] The contrast is even more pronounced than the tread 2 and / or the sidewall comprises a luminosity, called second brightness L * 2, globally greater than or equal to 18, as shown in FIG. 3. [33] It will be noted that the values between 15 and 18 are representative of a gray level which is not enough in contrast with the marking. when the flank 3 is smooth, tests carried out by the inventive entity have shown that the flank 3 generally has a luminosity of between 23 and 25. Similarly, when the flank 3 has grooves (which give an aesthetic appearance to the flank ), tests carried out by the inventive entity have shown that the flank 3 has a luminosity substantially equal to 20. [34] In a non-limiting variant embodiment, the marking 4 comprises a first brightness L * 1 between 6 and 15. In this range of values, an industrially achievable marking is obtained. [35] In a non-limitative embodiment, the marking 4 comprises a first brightness L * 1 between 8 and 9. At these values, the realization of the marking is easy to implement. [36] Thus, by defining brightness values for the marking, it is ensured to have a uniform marking on all the tires manufactured. [37] In a nonlimiting variant embodiment, the second brightness L * 2 is greater than or equal to 25. This accentuates the contrast of the marking 4 with the tread 2 and / or the sidewall 3. [38] different variants of luminosities L * 1 and L * 2 are also illustrated in FIG. 3. [39] During the manufacture of the tire 1 and the embodiment of the marking 4 on said tire 1, it will be very simple for a tire manufacturer to qualify the quality of said marking 4 by simply checking the value of the first brightness L * 1 with an appropriate measuring device. [40] In the case where the value of the first brightness L * 1 is not part of the desired range of values, it means that the marking 4 obtained does not correspond to the standard established by the manufacturer. One of the possible reasons may be fouling of the mold which makes it possible to carry out the marking 4. In fact, during the use of the mold, a gum residue may become lodged in the cavities of the mold which correspond to the negative of the marking 4. in the case where the marking 4 is formed of a texture composed of protruding elements as described in detail later in the description. At this moment, it is sufficient for the manufacturer to clean the mold to obtain a marking 4 again compliant. [41] Moreover, the tire manufacturer will be able to easily determine whether the marking contrast 4 is sufficient with respect to the tread 2 and / or the sidewall 3 by checking the value of the second brightness L * 2 with the appropriate measuring device. [42] In a non-limiting example, the appropriate measuring apparatus is a CM 700D spectrocolorimeter of the brand KONICA-MINOLTA. This apparatus is adapted to measure: the luminosity L * 1, L * 2 of a part of the tire (whether for the marking 4 and for the tread 2 and / or the sidewall 3 of the tire); a component a * which defines a first shade of color between red and green; A component b * which defines a second color shade between yellow and blue. [43] Positioning said apparatus on the part of the tire 1 to be measured and said apparatus gives the values of the three parameters L *, a *, b * relating to the marking 4. These measurements are made with the SCI mode ( Specular reflection mode included) set at a 10 ° angle and a D65 light setting (set according to the International Commission on Illumination, CIE). [44] With this device, it quantifies the brightness of the marking 4 which is compared to the brightness of the tread and / or the sidewall. This quantification can be done every day in order to define in particular the fouling speed of the marking mold 4. [45] In a non-limiting embodiment, the marking 4 is formed of a texture comprising a plurality of elements protruding or recessed with respect to the tread 2 and / or the sidewall 3. This texture is integral with the tread 2 and / or the side 3. Said otherwise, the texture is in the same rubber material that the tread 2 and / or the sidewall 3. [46] The texture 5 is described below according to the various non-limiting embodiments. [47] According to a first nonlimiting embodiment, the texture 5 therefore comprises a plurality of protruding elements relative to the surface where said texture 5 is located, namely the surface 30 of the sidewall 3 in the case illustrated in FIG. FIG. 1a shows the tread surface 20 of the tread 2 in the case illustrated in FIG. 2. [48] The effect of these protruding elements is to "trap" a large quantity of the incident light rays which meet the texture 5. In this first embodiment, the texture 5 (called "velvet") makes it possible, on the one hand, to obtain a "velvet" type visual because the protruding elements absorb the light and thus make the marking 4 blacker than the tread and / or the sidewall, and secondly, a touch of "velvet" type, said protruding elements providing a marking 4 25 pleasant to the touch. [49] Figure 4 illustrates the texture 5 according to a first non-limiting embodiment of the first embodiment. In this variant, all or part of the protruding elements are strands 6 distributed in the texture 5 in a density at least equal to one strand per square millimeter (mm 2), each strand having an average section S of between 0.0005 mm 2 and 1 mm2. It should be noted that the average section of each strand corresponds to the average of sections S measured at regular intervals from the base of the strand. The strands 6 have a generally conical shape with a decreasing section in the Hb height of these strands. [50] Figure 5 illustrates the texture 5 according to a second non-limiting embodiment of the first embodiment. In this variant, all or part of the protruding elements 5 are slats 7 substantially parallel to each other, the pitch P of the slats in the texture being between 0.1 mm and 0.5 mm, each slat 7 having an average width of between 0.02 mm and 0.25 mm. It should be noted that the average width corresponds to the average of the widths 1 measured at regular intervals in the height H1 of the lamella, the height of each lamella being between 0.05 and 0.5 mm. [51] In another embodiment, the texture comprises a combination of strands 6 and slats 7. [52] Figure 6 illustrates the texture 5 according to a third non-limiting embodiment of the first embodiment. In this variant, all or part of the protruding elements form parallelepipeds 8 with a side C of between 0.05 mm and 0.5 mm, with a height Hp of between 0.05 mm and 0.5 mm, the distance Dp between two adjacent parallelepipeds 8 in the texture being between 0.05 mm and 0.5 mm. [53] In another alternative embodiment, the texture comprises a combination of the raised elements 6, 7 and 8, or 6 and 8, or 7 and 8 described above. [54] Figure 7 illustrates the texture 5 according to a fourth non-limiting embodiment of the first embodiment. In this variant, the protuberance elements 9 present in the texture 5 forms and distances between elements in variable protuberance. This variant makes it possible to make the protruding elements on the texture 5 less visible. [55] According to a second nonlimiting embodiment, the texture 5 comprises a plurality of hollow elements 10 (also called holes) with respect to the surface where is said texture 5, namely the surface 30 of the sidewall 3 in the case illustrated in Figure 1 or the tread surface 20 of the tread 2 in the case illustrated in Figure 2. The recessed elements 10 are composed of openings 11 on the surface and associated cavities 12 extending into the depth of the surface. [56] Thus, the texture 5 comprises a plurality of openings 11 in the surface, said openings 11 being distributed in the texture 5 at a density at least equal to one aperture per square millimeter (mm 2) and having on the surface Dt diameters equivalent between 0.01 mm and 1.2 mm. [57] The openings 11 extend in the depth of the surface to form cavities 12. [58] The effect of these cavities 12 is to "trap" a large quantity of the incident light rays that meet the texture 5, but Also, as the cavities 12 are recessed in the surface, the impact of the mechanical aggressions on the texture, such as friction of a roadway is lower than for protuberances. In this second embodiment, the texture 5 (called "velvet") makes it possible to obtain a visual of the "velvet" type because the cavities absorb the light and thus make the marking darker. [59] In a non-limiting embodiment, all or part of the cavities 12 has a depth of at least 0.1mm. In a non-limiting embodiment variant, all or part of the cavities 12 has a depth of between 0.2 mm and 0.6 mm. In this way, it is ensured that a large amount of incident light rays which meets the texture is trapped by said texture and, since the depth of the cavities is limited, it is also avoided to degrade the mechanical strength of the surface too much. 20/30. [60] Fig. 8 illustrates the texture according to a non-limiting variant of this second embodiment. In this variant, all or part of the cavities 12 are in the form of cones which extend in the depth of the 20/30 surface and open out onto the surface forming circular openings 11. The cavities 12 thus have a section which decreases in the depth of the surface. In this way, the contrast of the texture is improved with respect to the remainder of the tread 2. It should be noted that in this variant, the openings 11 of the cavities 12 do not touch each other. The openings 11 are separated by intermediate zones 13. In addition, the openings 11 are evenly distributed over all or part of the surface 20/30 so that the distance d between each opening of the texture is generally similar. [61] FIG. 9 is a zoom on a cavity 12 of a hollow element 10 of the texture of FIG. 8. In one nonlimiting embodiment, all or part of the cavities has at least one wall 14 which, in a sectional view, forms an angle p between 10 ° and 60 ° relative to a direction Z perpendicular to the texture 5. [62] Whenever a light ray encounters a wall 14 of the cavity 12, that It is reflected by said wall 14. The direction of reflection of the light beam depends on the initial direction of this light ray and the angle of inclination of the wall 14. Thus, depending on this initial direction and this angle of inclination, the light ray can be returned to another wall 14 of the cavity. Conversely, the light ray can be returned outside the cavity, for example directly to an observer. In the first case, the light ray "gets lost" in the cavity and it will no longer be perceptible by the eye of an observer. In the second case, the observer 15 can perceive the light ray and the texture may then appear to be lighter and therefore less contrasted with respect to the rest of the tread. By choosing a cavity 12 having at least one wall 14 which forms an angle p between 10 ° and 60 °, it is ensured that a large part of the light rays entering the cavity 12 will be absorbed by this cavity under the effect of multiple reflections within the cavity. In this way, the contrast of the texture with respect to the tread and / or the sidewall is improved while maintaining the same cavity occupancy rate in the texture. In addition, with this wall inclination, the texture strength is generally improved, especially during repeated friction with the roadway. [63] The invention is not limited to the examples described and shown and various modifications can be made without departing from its scope. [64] Thus, according to another non-limiting embodiment, the slats 7 of Figure 5 may be discontinuous. They have a flat part between them. They may furthermore have differences in section between them. In addition, the slats may have curvatures or angles, especially in their length. They can also be of variable length. [65] Thus, according to another variant of non-limiting embodiment, the openings 11 of Figure 8 may have the shape circular, square, or polygonal (eg hexagonal) and the corresponding cavities 12 a cylindrical shape, parallelepipeds , or even polygons. With these two last structures (square or polygonal), it is possible to more easily organize the openings 11 relative to each other so as to limit the area of the intermediate zones 13 between these openings. With such aperture shapes, one can more easily achieve consistent rates of aperture occupancy. [66] Thus, according to another non-limiting embodiment, the tread 2 of the tire and the sidewall 3 may each have a marking 4. [67] Thus, the invention described has the following advantages: - It makes it possible to check in a simple way the contrast of the marking with respect to the tread and / or the sidewall, and in particular if the black depth of the "velvet" is sufficient in the case of a marking formed by a texture of type 20 velvet; - It allows to check in a simple way the quality of velvet texture; - It makes it possible to qualify the marking by defining a standard so as to obtain homogeneous markings for all the tires and in conformity with the request of a manufacturer or a customer of a manufacturer; It allows to qualify the contrast of the marking with respect to the tread and / or the sidewall so as to obtain uniform contrasts for all the tires; and - It makes it possible to evaluate the fouling of a mold intended to carry out the marking.
    权利要求:
    Claims (5)
    [0001]
    REVENDICATIONS1. Pneumatic tire (1) made of rubber material comprising a tread (2) and a sidewall (3), said tire (1) comprising on the tread (2) and / or said sidewall (3) a marking (4) making contrast with said tread (2) and / or said sidewall (3) characterized in that the marking (4) has a brightness, called first brightness (L * 1), between 0 and 15 and the tread ( 2) and / or the flank (3) has a brightness, called second brightness (L * 2), globally greater than or equal to 18.
    [0002]
    2. Tire (1) according to claim 1, characterized in that the first brightness (L * 1) is between 6 and 15.
    [0003]
    3. Pneumatic tire (1) according to one of claims 1 or 2, characterized in that the first brightness (L * 1) is between 8 and 9.
    [0004]
    4. A tire (1) according to any one of claims 1 to 3, characterized in that the second brightness (L * 2) is greater than or equal to 20.
    [0005]
    Pneumatic tire (1) according to one of Claims 1 to 4, characterized in that the marking is formed by a texture (5) comprising a plurality of protuberance elements (6, 7, 8, 9) or hollow (10) with respect to the tread (2) and / or the sidewall (3).
    类似技术:
    公开号 | 公开日 | 专利标题
    EP3116726B1|2019-10-09|Tyre including a high-contrast texture in a groove
    FR3022851A1|2016-01-01|PNEUMATIC COMPRISING A HIGH CONTRAST MARKING
    EP2895340B1|2017-05-03|Tyre comprising a high contrast pattern comprising a plurality of cavities
    EP2691246B1|2015-03-18|High contrast tyre pattern
    EP3116724B1|2019-11-20|Tyre including a high-contrast texture on the tread surface
    EP3166803B1|2019-10-09|Tire comprising a high contrast marking.
    WO2014202729A1|2014-12-24|Tire comprising a high-contrast marking
    EP3277525B1|2020-04-29|Tyre comprising a textured tread
    WO2014202731A1|2014-12-24|Tyre comprising high-contrast marking
    EP3116725B1|2019-10-09|Tread comprising a strong-contrast texture in a groove
    EP3166801A2|2017-05-17|Tyre comprising a mark formed by a plurality of linear patterns
    WO2015086447A1|2015-06-18|Tyre comprising a particular graphic element
    FR3023507A1|2016-01-15|PNEUMATIC COMPRISING A MARKING COMPRISING A PLURALITY OF GRAY LEVELS
    EP3368352B1|2019-08-21|Tread with concealed cavities comprising a wear indicator having improved visibility
    WO2016156719A1|2016-10-06|Tyre comprising a tread and a wear indicator
    WO2018060586A1|2018-04-05|Tyre with partially textured tread
    WO2017072318A1|2017-05-04|Tread with concealed cavities comprising a wear indicator having improved visibility
    同族专利:
    公开号 | 公开日
    FR3022851B1|2018-05-11|
    WO2016000985A1|2016-01-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2614968A1|2010-09-09|2013-07-17|Bridgestone Corporation|Tire|
    WO2013069802A1|2011-11-08|2013-05-16|株式会社ブリヂストン|Pneumatic tire|
    WO2013069260A1|2011-11-08|2013-05-16|株式会社ブリヂストン|Tire|
    FR2995254A1|2012-09-12|2014-03-14|Michelin & Cie|PNEUMATIC COMPRISING A HIGH-CONTRAST PATTERN COMPRISING A PLURALITY OF CAVITIES|FR3057209A1|2016-10-11|2018-04-13|Compagnie Generale Des Etablissements Michelin|PNEUMATIC HAVING A TEXTURE RING|
    WO2018162308A1|2017-03-06|2018-09-13|Compagnie Generale Des Etablissements Michelin|Tyre provided with a texture on a sidewall|
    WO2019243683A1|2018-06-22|2019-12-26|Compagnie Generale Des Etablissements Michelin|Pneumatic tyre comprising a reinforced sidewall|
    EP3684606A4|2017-09-22|2021-05-19|Bridgestone Americas Tire Operations, LLC|Pneumatic tire with a textured surface, method of manufacturing, and textured mold|JP5823877B2|2012-01-11|2015-11-25|株式会社ブリヂストン|tire|
    EP2818335A4|2012-02-24|2015-10-07|Bridgestone Corp|Pneumatic tire|FR3089453A3|2018-12-11|2020-06-12|Michelin & Cie|Tire with colored marking and texture on a sidewall|
    FR3102394A1|2019-10-24|2021-04-30|Compagnie Generale Des Etablissements Michelin|Tire baking mold comprising a removable insert, and associated manufacturing process|
    法律状态:
    2015-06-19| PLFP| Fee payment|Year of fee payment: 2 |
    2016-01-01| PLSC| Search report ready|Effective date: 20160101 |
    2016-06-27| PLFP| Fee payment|Year of fee payment: 3 |
    2017-06-21| PLFP| Fee payment|Year of fee payment: 4 |
    2018-06-20| PLFP| Fee payment|Year of fee payment: 5 |
    2020-03-13| ST| Notification of lapse|Effective date: 20200206 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1456137A|FR3022851B1|2014-06-30|2014-06-30|PNEUMATIC COMPRISING A HIGH CONTRAST MARKING|
    FR1456137|2014-06-30|FR1456137A| FR3022851B1|2014-06-30|2014-06-30|PNEUMATIC COMPRISING A HIGH CONTRAST MARKING|
    PCT/EP2015/063853| WO2016000985A1|2014-06-30|2015-06-19|Tyre comprising a high-contrast marking|
    [返回顶部]