Abstract: The invention relates to improving the endurance of the beads of a radial tire for a heavy vehicle of construction plant type by reducing the cracking that starts at the end of the turn-up and spreads through the polymer coating, edging and filling materials. According to the invention, a transition element, made of a polymer transition material, is at least partially in contact, on its axially outer face, with the polymer edging material and, on its axially inner face, with a polymer filling material, the radially outer and radially inner ends of the transition element are respectively radially on the outside and radially on the inside of the end of the turn-up and the elastic modulus at 10% elongation of the polymer transition material is somewhere between the respective elastic moduluses at 10% elongation of the polymer edging material and of the polymer filling material with which the transition element is in contact.

Abstract: A molding element of a mold for molding and vulcanizing a tire tread, this tread having a tread surface intended to come into contact with the ground when the tire is rolling. This molding element has a molding surface adapted to mold part of the tire tread surface and a blade adapted to mold a sipe or a groove in the tread. The molding element has two lamella positioned on either side of the blade at a distance from this blade, each lamella having a bulge at one extremity far away from the molding surface. Each lamella having cutting means extending from the bulge.

Abstract: A non-pneumatic wheel with reinforcement bands that provide structural support for the wheel and a method of manufacture of such a wheel are described. The reinforcement band forms part of an annular reinforcement structure that includes foam spacers positioned between the annular reinforcement band. The foam can be a reticulated foam into which a matrix material such as a polyurethane is introduced. The matrix material can also be used to form one or more features of the non-pneumatic wheel such as spokes, a mounting band, and a hub.

Abstract: In the method for manufacturing an uncured blank of a vehicle tire, a strip (30) of rubber is extruded and is made to pass between two members (18, 10) one of which forms a roller (18) for extruding the strip, such that the faces (21, 23) of the strip, forming one and the same section of the strip in a plane perpendicular to a direction of travel of the strip and pressing simultaneously against the respective members, are driven at linear speeds that differ from one another, and that the members (18, 10) stretch the strip between them.

Abstract: Systems and methods for improving tire uniformity, for instance to reduce cavity noise and other effects caused by localized tire surface anomalies are provided. The localized tire surface anomaly can be manifested as a local peak of radial nm out or other uniformity parameter (e.g. radial force variation) for the tire. The local peak of radial run out can be within uniformity tolerances for radial run out, but can still contribute to cavity noise through the high harmonic effects caused by the local peak. According to aspects of the present disclosure, the location and/or other identifiable characteristics of a localized tire surface anomaly can be identified. An ablation device can be used on the tread of the tire to remove tire material at an azimuthal location associated with the localized tire surface anomaly to improve the uniformity of the tire.

Abstract: The invention relates to a triblock diene elastomer, the central block of which is a polyether block having a number-average molecular weight ranging from 150 to 5000 g/mol and is connected via a silicon atom to each of the lateral blocks, and the chain ends of which are functionalized to at least 70 mol %, with respect to the number of moles of chain end, by an amine function.

Abstract: A bicycle tire comprises a toothset (5) of substantially radial generatrix (G), positioned to collaborate with a complementary toothset of a driving pinion of an electrical assistance device. The toothset (5) has teeth (51) that are equidistant by a pitch p, each tooth having a length l, in the direction of the generatrix (G), and a substantially triangular section, in a plane perpendicular to the generatrix (G), of height h. Each tooth (51) comprises an elastomeric material having an elastic shear modulus G* at least equal to a threshold elastic shear modulus G*s, G*s being such that the displacement d of the crest of each tooth is equal to 0.2 times the height h of the tooth under the action of a uniform pressure, applied by the complementary toothset to the side that forms the smallest angle, equal to 650/(l×h×(2.67?0.33×p)).

Abstract: A semi-finished product or tire comprises a metal reinforcing element embedded in a rubber composition comprising a compound of formula (I): where X and Y represent, independently of one another, an alkali metal or alkaline earth metal cation.

Abstract: Molding element of a mold for molding and vulcanizing a tire tread, this tread having a tread surface intended to come into contact with the ground when the said tire is rolling. The molding element having a molding surface intended to mold part of the tire tread surface and a blade intended to mold a sipe or a groove in the tread. Indeed, the molding element has two cutting means positioned on either side of the blade at a certain distance from this blade, these cutting means having a plurality of pins.

Abstract: A pneumatic tire includes an internal sealing layer, which partially delimits an internal volume of the pneumatic tire, and a self-sealing layer formed of a self-sealing product. The self-sealing layer is positioned radially on an inside region with respect to the internal sealing layer, and has a creep resistance indicator that decreases radially outwards, i.e., towards outside of the pneumatic tire.

Abstract: A tire comprising at least a rubber composition based on at least a blend of natural rubber, NR, or synthetic polyisoprene, and a styrene-butadiene copolymer, SBR, the SBR having a content greater than or equal to 20 parts per hundred parts of elastomer, phr, a reinforcing filler comprising carbon black, characterized in that the composition comprises a plasticizing resin having a glass transition temperature, Tg, greater than or equal to 20° C. and that the SBR has a Tg greater than or equal to ?65° C.

Abstract: A method for precisely controlling the volume of a product such as a tire tread or tire that is placed into a mold is provided. This method includes providing a tread or tire that is built upon a portable mold core by laying a series of layers on the portable mold core. The outer diameter of the tire tread or tire is initially built to be purposely smaller than the interior surfaces of the mold in order to prevent any interference from occurring between the mold and the tire tread once the tire tread and core are placed within the mold and the mold is closed. The weight of the tire tread or tire is measured to see if the volume of the tire tread or tire is within acceptable parameters to fit within the mold. If not, additional material is added to the tire or tire tread.

Abstract: Particular embodiments of the invention include methods and apparatus for molding and/or curing an article. Particular embodiments of such methods include positioning a mold core centrally within mold outer portion to form an annular mold cavity between the mold outer portion and the mold core, the core including an outer ring having an outer surface for engaging the annular article, the outer ring being formed of a material capable of expanding and contracting with changes in temperature. Such methods also include heating the mold outer ring, cooling the core outer ring subsequent to the step of heating, whereby the core outer ring contracts relative to the article, and removing the article from the core outer ring.

Abstract: A radio frequency (RF) treatment apparatus includes a main machine and a treatment handpiece. The treatment handpiece may comprise an RF output device, comprising a controller, an RF electrode module, an RF electrode driving circuit, and an RF generation module. The treatment handpiece may also employ a modified arrangement of the plurality of RF electrodes and/or an adjusted series-connection pattern. The treatment handpiece may also be provided with a microneedle member, which includes a plurality of microneedles, a printed circuit board (PCB), and a substrate plate, wherein the plurality of microneedles comprise a plurality of long microneedles and a plurality of short microneedles.

Abstract: Passenger vehicle tire having a tread extended on either side by sidewalls, this tread being provided with an asymmetric tread pattern with respect to a median plane that divides this tread into two parts with the same axial width, this axial width being measured in a direction parallel to the axis of rotation, an external part and an internal part, this external part being situated between this median plane and the sidewall intended to be positioned on the outside of a vehicle, and the internal part being situated between the same plane and the sidewall intended to be positioned towards the inside of the same vehicle, the internal part and the external part each having at least one void that forms a groove or is intended to form a groove when the tread has partially worn away, these voids defining, in the new state and for each (internal and external) part, a total voids volume Vi0 and Ve0, respectively, and a voids surface ratio Ti0 and Te0, respectively, these ratios being other than zero and such that, in

Abstract: An electronic assembly, which is intended for installation in a tire, includes an electronic device and a transition layer. The electronic device includes an electronic member and at least one antenna fixed to a support of the electronic member. Each antenna includes a free part, which is free with respect to the support, joined to a fixing part, which fixes the antenna to the support. The transition layer is formed of a composition that includes 9 to 13 parts of sulfur per hundred parts by weight of elastomer. The transition layer coats at least a junction between the free part and the fixing part of each antenna.

Abstract: The invention relates to a method of manufacturing a molding element for a tire mold. The molding element comprises a sintered part and a non-sintered part attached to the sintered part. The sintered part comprises a shell and a core internal to the shell and formed as one piece with the said shell. The core comprises a meshed structure comprising a plurality of cavities. The method of manufacture comprises a step of manufacturing the sintered part of the molding element from a metallic powder deposited on a flat surface of a support plate and fused layer by layer, the sintered part being attached to the support plate by fused metallic powder. The method also comprises a step of machining the support plate to form the non-sintered part of the molding element.

Abstract: Device for supporting a raw rubber tire for the manufacture of a pneumatic tire having arms, each bearing a block articulated to the arm and arranged to extend above it. Each block has an upper face arranged to support an upper bead of a tire and a lower face arranged to be actuated by a lower bead of the tire. Each block is arranged such that, with the block extending as a projection from the arm in a direction radial to a main axis of the device on an opposite side of the arm to the axis, an upward force on the lower face places the block in a position in which it no longer extends as a projection from the arm in the radial direction on that side of the arm.

Abstract: The screw is intended for the extrusion or mixing of elastomers or plastic products. It comprises: a support, at least one sleeve having at least one relief projecting from an external face of the sleeve, and at least one split annular securing member, the member being clamped between the sleeve and the support in a radial direction with respect to an axis of the screw so as to secure the sleeve rigidly to the support. The member and the sleeve have frustoconical faces in mutual contact.