Abstract: A process and apparatus for applying noise reducer elements to tyres. Each noise reducer element has an anchoring surface coated with an adhesive layer. The anchoring surface is illuminated with a reference radiation. The radiation emitted by the anchoring surface is detected; and a digital image representative of the anchoring surface is determined as a function of the emitted radiation. Each pixel of the digital image is associated with a respective brightness value representative of the amount of adhesive present in an area of the anchoring surface corresponding to such each pixel. One or more noise reducer elements are applied on the radially inner surface of a tyre.

Abstract: A method for depositing a piece of band-like elastomeric element on a forming support in a process for building a tyre for vehicle wheels. The method includes feeding a piece of band-like elastomeric element having a predetermined nominal length towards the forming support along a predetermined feeding direction and measuring the actual length of the piece along the feeding direction. If the actual length is lower than or equal to a circumferential length of a deposition surface defined on the forming support, the piece is deposited on the deposition surface while the forming support rotates about a rotation axis thereof. During such deposition the piece is pressed on the deposition surface with a pressing force selected as a function of the actual length.

Abstract: A process for applying noise-reducing elements to a tyre for vehicle wheels. A plurality of noise-reducing elements are arranged on a feeding belt movable along a predetermined feeding direction. The noise-reducing elements are subsequently aligned along the feeding direction and brought into mutual contact, to then be transferred onto a service plane arranged downstream of the feeding belt along the feeding direction and having, on an upper surface thereof, a continuous film which supports a layer of adhesive material. The layer of adhesive material is applied onto a lower surface of each of the noise-reducing elements taking it from the continuous film. The noise-reducing elements are then transferred one by one onto a conveyor belt arranged downstream of the service plane along the feeding direction. The noise-reducing elements are finally positioned one by one on a radially inner surface of a tyre.

Abstract: Bicycle tyre (100) comprises a pair of bead cores (8), a carcass structure (2) turned around the pair of bead cores (8) and a tread band (4) radially outer to the carcass structure (2); at each bead core (8) being provided: an elastomeric material filler (12) which extends in a radial direction for a first length (H1) starting from the bead core (8), wherein the first length (H1) is at least 20% of the distance (H4) measured in the radial direction between the bead core (8) and the radially outermost portion of the carcass structure (2).

Abstract: Bicycle tyre (100) which comprises a pair of bead cores (8), a carcass structure (2) turned around the pair of bead cores (8) and a tread band (4) radially outer to the carcass structure (2); at each bead core (8) being provided: an elastomeric material filler (12) which extends in a radial direction for a first length (HI) starting from the bead core (8), a loop (15) interposed between the carcass structure (2) and the elastomeric material filler (12), turned around the bead core (8) so as to define a first flap (15a) axially outer to the elastomeric material filler (12) and a second flap (15b) axially inner to the elastomeric material filler (12), wherein the first flap (15a) extends in a radial direction for a second length (H2) and the second flap (15b) extends in a radial direction for a third length (H3); preferably, the second (H2) and third (H3) lengths are less than or equal to the first length (H1).

Abstract: A station for checking tyres includes a support structure defining an operating space for receiving a tyre and an overturning device with grip elements for engaging a radially outer portion of the tyre. A checking device includes a mechanical arm and at least one sensor associated with the mechanical arm. The overturning device overturns the tyre around an overturning axis perpendicular to a rotation axis of the tyre when the tyre is in the operating space. The mechanical arm is operatively active within the operating space and carries the sensor at least partially within the tyre for executing checks on an inner surface of the tyre housed in the operating space.

Abstract: Motorcycles tyre, comprising: a radial carcass structure (2); a belt structure (6) applied in radially outer position with respect to the radial carcass structure (2); a tread band (8) applied in radially outer position with respect to the belt structure (6). The tyre (1) has a curvature ratio (f/C) greater than or equal to about 0.25. The tread band (8) comprises: a plurality of blocks (14) mutually spaced so as to define a tread pattern with a void/solid ratio (1?Sb/St) comprised between about 25% and about 50%; transverse grooves (11) placed in succession along the circumferential extension of the tyre (1) and each substantially extending over the entire axial width of the tread band (8). Each transverse groove (11) substantially extends along an axial direction. Two successive transverse grooves (11) circumferentially delimit an assembly (12) of blocks (14) placed in succession over the entire axial width of the tread band (8). Circumferential grooves (13) delimit the blocks (14) of an assembly (12).

Abstract: The present invention relates to a tyre comprising at least one structural element including a cross-linked elastomeric material obtained by cross-linking a cross-linkable elastomeric composition comprising per 100 phr of vulcanisable polymer: (a) from 90 to 10 phr of at least one non-functionalised elastomeric polymer; (b) from 10 to 90 phr of at least one functionalised elastomeric polymer; (c) from about 10 phr to about 120 phr, preferably about 20 phr to about 90 phr of at least one white reinforcing filler; (d) from about 5% to about 15% by weight with respect to the amount of white reinforcing filler of a mixture of silanes, said mixture comprising at least one sulfur-silane and at least one amino-silane.

Abstract: The present invention relates to a method and an apparatus for applying noise reducing elements to tyres for vehicle wheels. Noise reducing elements (12), all equal to each other, are fed in succession on a conveyor (20) according to a predetermined path and are oriented on the predetermined path all in the same way. Tyres (2) of different sizes (C, P) are fed in succession on a conveyor (20) up to an application station (34). In the application station (34), the noise reducing elements (12) are picked up from the conveyor (20) and applied to radially inner surfaces of the tyres (2). The application comprises: arranging the noise reducing elements (12) with the larger dimension (L) directed in a circumferential direction or arranging the noise reducing elements (12) with the larger dimension (L) directed in an axial direction as a function of the sizes (C, P) of the tyre (2) in which they are applied.

Abstract: Adducts are described, obtainable from the reaction product of a secondary amine and a diketone, with carbon allotropes in which the carbon is sp2 hybridized, such as graphene, graphite, fullerene, carbon nanotubes and the like, and an inorganic oxide-hy-droxide. A process for preparing said adducts is also described.

Abstract: A green tyre (2) for bicycles is built, comprising at least one carcass ply (4) having axially opposite end flaps (4a) engaged with respective bead cores (5) and a tread band (6) applied in a radially outer position around said at least one carcass ply (4). The green tyre (2) removed from the building drum, is profiled so as to translate the tread band (6) in a radially outer direction with respect to the bead cores (5), so as to impart a cross-sectional convex profile to the tyre (2) in a radially outer direction. The profiled tyre is engaged by means of a transfer member (31) while the tyre itself is mechanically restrained so as to maintain at least partly said cross-sectional convex profile in the radially outer direction.

Abstract: Method for setting up a tyre checking apparatus, said apparatus (1) comprising at least: a support base (34) for a tyre (2); a first acquisition device (430) and a second acquisition device (43a) for acquiring images representative of said tyre (2) positioned on said support base (34); a first robotic member (40a) for moving said second acquisition device (43a). Said method comprises: providing a setup device (100) comprising: a first wall (110) having first predefined shapes (F1); a second wall (120) having second predefined shapes (F2), said second wall (120) being substantially parallel and non-coplanar to said first wall (110); a top surface (130); a central reference (140) arranged on said top surface (130). Said method also comprises: executing at least one of a first set-up and a second set-up.

Abstract: The present invention relates to an apparatus and to a process for building tyres for vehicle wheels, wherein sidewalls (11) are applied on opposite sides of a carcass sleeve (12) placed on a shaping drum (13). The application of the sidewalls (11) comprises: arranging each sidewall (11) as a ring around application levers (24) of a respective support (18), making an axial appendage (35) of the sidewall (11) protrude axially beyond the free ends (25) of the respective application levers (24); radially opening the free ends (25) of the application levers (24) of each support (18) so as to make the respective sidewall (11) radially expand; axially approaching the free ends (25) of the application levers (24) to the respective half-drum (17) up to engaging the axial appendage (35) with the carcass sleeve (12) and radially opening the free ends (25) of the application levers (24) to adhere the sidewalls against the carcass sleeve (12).

Abstract: The invention relates to a tyre (100) for vehicle wheels comprising at least one structural element comprising a vulcanized elastomeric material obtained by vulcanizing a vulcanizable elastomeric composition comprising at least one vulcanizable diene elastomeric polymer and at least one composite reinforcing filler, a process for producing a tyre (100) comprising the composite reinforcing filler, a masterbatch comprising the composite reinforcing filler and a process for producing the same, as well as a process for producing the composite reinforcing filler.

Abstract: The present invention relates to a tyre for vehicle wheels comprising at least one structural element comprising a crosslinked elastomeric material obtained by crosslinking a crosslinkable elastomeric composition comprising a predispersion of natural rubber and lignin obtained by co-precipitation from latex, where said lignin has a concentration of phenolic groups higher than 2 mmol per gram of lignin, and where said predispersion comprises an amount of said lignin such as to provide, in said crosslinkable elastomeric composition, a concentration of lignin equal to or lower than about 25 phr.

Abstract: The present invention relates to new vulcanisable elastomeric compositions for components of tyres, comprising modified silicate fibres as fillers. The silicate fibres are modified according to the process with controlled pH of the invention. In addition, the invention regards components of tyres, comprising elastomeric materials obtainable by vulcanisation of said compositions, and tyres for vehicles comprising one or more of said components. The vulcanised elastomeric materials according to the invention are characterised by good static and dynamic mechanical properties, in particular by particularly low hysteresis. Advantageously the tyres of the invention comprising one or more of said components have a limited rolling resistance.

Abstract: In building tyres, an intermediate portion of a carcass structure is built at a time on a respective forming drum within an intermediate forming line. The forming drum with the intermediate portion of the carcass structure is made available at a first transfer location. The intermediate portion of the carcass structure is completed through n completion locations with n?1 and then transferred for the subsequent assembling with a crown structure to a second transfer location. At an operating moment in which the first transfer location is occupied by a forming drum coming from the intermediate forming line or intended for the intermediate forming line, from one to n locations selected from the n completion locations and the second transfer location are occupied by respective forming drums.

Abstract: A method for controlling the laying down of components of tyres on forming drums, includes: sending a first electromagnetic radiation on a first laying down structure including a forming drum and a first component of a tyre laid down on the forming drum; detecting at least a first corresponding reflected radiation, determining as a function of the first reflected radiation a first parameter representative of a first main length of the first component; comparing the first parameter with one or more pre-stored reference values; generating a first correction signal as a function of the comparison; and sending the first correction signal to at least one preparation station adapted to prepare the first component to regulate the preparation of further components. An apparatus for controlling the laying down of components of tyres on forming drums is also described.

Abstract: A process for manufacturing tyres for vehicle wheels, comprising the step of building on a forming support a carcass structure comprising at least one carcass ply and, at at least one end edge of the carcass ply, at least one annular anchoring structure comprising at least one substantially circumferential annular insert and at least one filling insert associated to said at least one substantially circumferential annular insert. The step of building the carcass structure comprises the steps of positioning the annular anchoring structure on the carcass ply by moving the annular substantially circumferential insert into contact with an end edge of the carcass ply by means of a special positioning member, pulling down the filling insert on the end edge of the carcass ply and turning up a free end portion of the end edge of the carcass ply so as to form a turned up end portion of the carcass ply including said annular anchoring structure.

Abstract: The present invention relates to adducts between sp2 hybridized carbon allotropes and pyrrole derivatives comprising at least one sulphur atom, and crosslinkable elastomer compositions comprising such adducts. The present invention further relates to tyres for vehicle wheels comprising at least one structural element comprising a crosslinked elastomer material obtained by crosslinking of such crosslinkable elastomer compositions.