Abstract: A target assembly for a laser alignment system has a housing with a planar rear face, a front face and an interior between the front and rear faces. An aperture extends through the front face and into the interior. A reflective surface is in the housing interior forward of the planar rear face. The reflective surface is aligned so that a laser beam directed through the aperture and into the housing interior impinges on the reflective surface and is reflected 90°. A sensor cell in the target housing has a light sensitive surface aligned perpendicular to the planar rear face of the target housing. A distance from a point of impingement of the laser beam on the reflective surface to the light sensitive surface equals a distance from the point of impingement of the laser beam on the reflective surface to the planar rear face of the target housing.

Abstract: The present invention relates to A rubber composition is based on at least one elastomer matrix comprising from 45 to 80 phr of at least one polyisoprene and from 20 to 55 phr of at least one highly saturated diene elastomer, a tall oil ester plasticizer, carbon black, and a crosslinking system; the highly saturated diene elastomer is a copolymer of ethylene and 1,3-diene.

Abstract: A rubber composition is based on at least one elastomer matrix predominantly comprising a highly saturated diene elastomer, carbon black and an aliphatic diacid dialkyl ester, the highly saturated diene elastomer being a copolymer of ethylene and a 1,3-diene in which the ethylene units represent at least 50 mol % of the monomer units of the copolymer.

Abstract: The present invention relates to a rubber composition based on at least one elastomer matrix comprising from 45 to 80 phr of at least one polyisoprene and from 20 to 55 phr of at least one highly saturated diene elastomer; an aliphatic diacid dialkyl ester plasticizer, carbon black, and a crosslinking system; in which the highly saturated diene elastomer is a copolymer of ethylene and 1,3-diene.

Abstract: A tire which has improved mechanical properties comprises a rubber composition based on at least one diene elastomer, at least one thermoplastic polyurethane, and a crosslinking system; the composition does not comprise any reinforcing filler or comprises less than 25 parts by weight thereof per hundred parts by weight of elastomer, phr, the carbon black content in the composition being less than 20 phr.

Abstract: A rubber composition is based on at least one non-functionalized first diene elastomer E1 having a glass transition temperature TgE1, one functionalized second diene elastomer E2 having a glass transition temperature TgE2, a reinforcing filler capable of interacting with the functionalized diene elastomer E2 and a crosslinking system, in which: the glass transition temperature TgE1 is above or equal to -50° C., the glass transition temperature TgE2 satisfies the mathematical relationship TgE2 ? TgE1-23° C., and the content of the non-functionalized diene elastomer E1 is greater than or equal to 50 phr. A tread and/or a pneumatic or non-pneumatic tire may comprise at least one composition as defined above.

Abstract: An elastomeric laminate comprises at least two adjacent cohesive layers, the first layer consisting of a composition based on 10 to 100 phr of a copolymer of ethylene and of a 1,3-diene of formula CH2?CR—CH?CH2, the ethylene units in the copolymer representing more than 50 mol % of the monomer units of the copolymer, the symbol R representing a hydrocarbon chain having 3 to 20 carbon atoms, from 0 to 90 phr of a diene elastomer having a content by weight of diene unit of greater than 50%, and a crosslinking system; the second layer consisting of a composition based on a diene elastomer having a content by weight of diene unit of greater than 50% and a crosslinking system. Also disclosed is a tire, in particular a tire provided with a sidewall, comprising this composition.

Abstract: A rubber compound having at least two glass transition temperatures Tg1 and Tg2 is based on at least two rubber compositions C1 and C2, C1 comprising at least one elastomer E1 with Tg1, C2 comprising at least one elastomer E2 with Tg2 and a reinforcing filler, E2 being different from E1, where Tg1 is above or equal to -50° C., the rubber compound satisfies Tg1-Tg2 ? 23° C. and has a loss factor profile exhibiting the change in tan ? as a function of the temperature in °C. over a range extending from -80° C. to 60° C. at a frequency of 10 Hz and a constant stress of 0.7 MPa and exhibiting one or more peaks, such that all the tan ? peaks present at a temperature above Tg1 have a width at half height less than or equal to 23° C.; and E1 is predominant.

Abstract: A rubber composition having an adhesion to a composition based on natural rubber, the composition being at least based on 5 to 95 phr of polyisoprene comprising a content by weight of 1,4-cis bonds of at least 90% of the weight of the polyisoprene; 5 to 95 phr of copolymer of ethylene and of a 1,3-diene of formula CH2?CR—CH?CH2, the ethylene units in the copolymer representing more than 50 mol % of the monomer units of the copolymer, the symbol R representing a hydrocarbon chain having 3 to 20 carbon atoms; and a crosslinking system. Also disclosed is a tire, in particular a tire provided with a sidewall, comprising this composition.

Abstract: A rubber composition, which exhibits an improved fatigue strength and stiffness performance compromise, is based on at least one elastomer matrix containing at least one polyisoprene and at least one copolymer containing ethylene units and diene units; a paraffin oil having a glass transition temperature of less than -75° C.; a reinforcing filler comprising carbon black; and a crosslinking system, in which the at least one polyisoprene and the at least one copolymer containing ethylene units and diene units represent more than 40% by weight of the elastomer matrix.

Abstract: An elastomeric laminate comprises at least two adjacent cohesive layers, the first layer consisting of a composition based on 10 to 100 phr of a copolymer of ethylene and of a 1,3-diene of formula CH2?CR—CH?CH2, the ethylene units in the copolymer representing more than 50 mol % of the monomer units of the copolymer, the symbol R representing a hydrocarbon chain having 3 to 20 carbon atoms, from 0 to 90 phr of a diene elastomer having a content by weight of diene unit of greater than 50%, and a crosslinking system; the second layer consisting of a composition based on a diene elastomer having a content by weight of diene unit of greater than 50% and a crosslinking system. Also disclosed is a tire, in particular a tire provided with a sidewall, comprising this composition.

Abstract: An electro-optical level employs a bubble tube with opposite first and second ends. First and second light emitters are disposed respectively beyond the first and second axial ends of the tube and direct light toward the ends of the bubble in the tube. Electro-optical detectors are aligned substantially parallel to the axis of the tube and are spaced from the tube. First and second beams from the respective first and second light emitters scatter as the beams impinge upon the bubble. However, the scattered light from each light emitter will form a bright spot on the respective electro-optical detector at a point corresponding to the end of the bubble. The locations of the bright spots are detected by the electro-optical detectors and precisely determine the locations of the opposite ends of the bubble regardless of dimensional changes of the tube or the bubble due to temperature variations.

Abstract: Materials make it possible to generate mechanical coupling in elastomeric compositions, of use especially for the manufacture of tyre treads. In particular, a tread comprises a composite material based on an elastomeric matrix, a crosslinking system, a reinforcing filler and oriented short fibres.

Abstract: An electro-optical level employs a bubble tube with opposite first and second ends. First and second light emitters are disposed respectively beyond the first and second axial ends of the tube and direct light toward the ends of the bubble in the tube. Electro-optical detectors are aligned substantially parallel to the axis of the tube and are spaced from the tube. First and second beams from the respective first and second light emitters scatter as the beams impinge upon the bubble. However, the scattered light from each light emitter will form a bright spot on the respective electro-optical detector at a point corresponding to the end of the bubble. The locations of the bright spots are detected by the electro-optical detectors and precisely determine the locations of the opposite ends of the bubble regardless of dimensional changes of the tube or the bubble due to temperature variations.

Abstract: A tire (1) comprises a tread (3), a crown with a crown reinforcement (2), two sidewalls (5), two beads (4), a carcass reinforcement (6) anchored to the two beads (4) and extending from one sidewall (5) to the other, the tread comprising (a) an elastomeric matrix which comprises predominantly one or more thermoplastic elastomers comprising at least one elastomer block and at least one thermoplastic block, and (b) a crosslinking system based on one or more peroxides. The invention also relates to a process for preparing the tire.

Abstract: A tire having a rubber tread comprises a first radially inner layer C1 and a second radially outer layer C2, the first and second layers being intended to be in contact with a ground on which they are running, in new or worn condition, in which the rubber composition of the first layer C1 comprises more than 50 phr of a copolymer of ethylene and of a 1,3-diene, a reinforcing filler and a plasticizing system, the 1,3-diene being 1,3-butadiene or isoprene and the ethylene units in the copolymer representing more than 50 mol % of all the monomer units of the copolymer.

Abstract: A tire has a tread axially separated into at least three portions, a central portion and two lateral portions, in which the rubber composition of the lateral portions comprises more than 50 phr of a copolymer of ethylene and of a 1,3-diene, a reinforcing filler and a plasticizing system, the 1,3-diene being 1,3-butadiene or isoprene and the ethylene units in the copolymer representing more than 50 mol % of all the monomer units of said copolymer.

Abstract: The invention relates to a rubber composition which comprises an elastomer which is a copolymer of ethylene and of a 1,3-diene which comprises ethylene units which represent more than 50 mol % of the monomer units of the copolymer, the 1,3-diene being 1,3-butadiene or isoprene, 35 to 100 phr of a reinforcing filler which comprises a silica, a plasticizing system comprising a hydrocarbon plasticizing resin and a hydrocarbon liquid plasticizing agent, it being understood that the total content of hydrocarbon plasticizing resin and of hydrocarbon liquid plasticizing agent is greater than 10 phr and less than or equal to 80 phr. Such a composition confers on a tread of a tire an improved performance compromise between grip, roadholding and rolling resistance.

Abstract: A rubber composition based at least on natural rubber, on a copolymer of ethylene and of a 1,3-diene, on a carbon black and on a crosslinking system is provided. The carbon black content ranges from 20 phr to 40 phr, the volume fraction of carbon black ranges from 8% to 15%, the copolymer content ranges from 20 phr to less than 50 phr, the natural rubber content is greater than 50 phr, and the copolymer contains more than 50 mol % of ethylene. Such a composition exhibits an improved compromise between the properties of cohesion, stiffness, hysteresis and resistance to ozone. Such a composition is preferentially used in a tire sidewall.

Abstract: A tire whose tread consists totally or partly of a rubber composition which comprises at least 80 phr of a copolymer of ethylene and of a 1,3-diene which contains at least 70 mol % of ethylene units, between 25 phr and 55 phr of a carbon black, less than 1 phr of sulfur and a vulcanization accelerator is provided. The carbon black representing more than 60% by mass of the reinforcing filler of the rubber composition, the mass ratio between the sulfur content and the amount of vulcanization accelerator in the rubber composition being less than 1. The vulcanization accelerator is a primary accelerator or a mixture of a primary accelerator and of a secondary accelerator. Such a composition has good cohesion properties.