Bridgestone Europe Nv/sa

Bridgestone Corporation

Paolo Straffi

Roberto Pontone

Pasquale Agoretti

Salvatore Cotugno

Giancarlo Cossu

Stefano Ducci

Giuseppe Pezzullo

John Nazareno House

Alessio Ciarnella

Yochiro Kondo

Jos&eacute; Silicani

Jose Silicani

Maurizio Farn&eacute;

Barbara Secchi

Fabrizio Baroncini

Cristian Capaldi

Maria Cecilia Palumbi, I

Claudio D'alfonso

Roberto Comparelli

Francesca Nanni

Stefano Mori

Valeria Cherubini

José Antonio Silicani

A method and system for cleaning the inner surface of a tire, comprising the steps of: emitting a laser beam that is directed against the inner surface using at least an emitter device; performing deeper cleaning within at least a first annular zone of the inner surface in applying, using at least the laser beam, to the first annular zone a first surface energy density; and performing less thorough cleaning within at least a second annular zone of the inner surface by applying, using at least the laser beam to the second annular zone a second surface energy density that is lower than the first surface energy density.

Method and system for cleaning an inner surface of a tire

Method and application unit () for applying a sound-absorbing material () to an inner cavity of a pneumatic tyre () using a strip () of sound-absorbing material () provided on one side with an adhesive layer () covered with a protective lining (). The following steps are provided: attaching an initial part of the protective lining () to a recovery drum (); partially winding the strip of sound-absorbing material onto the applicator roller (); pressing, by means of the applicator roller (), the strip () of sound-absorbing material () against the inner cavity of the pneumatic tyre () whilst the pneumatic tyre () is caused to rotate; and rotating the recovery drum () synchronously with the pneumatic tyre (), such as to wind the protective lining () around the recovery drum (), step-by-step, as the protective lining () is separated from the strip () of sound-absorbing material ().

Method and application unit for applying a sound-absorbing material in an inner cavity of a pneumatic tire

Method and application unit () for applying a sound-absorbing material () to an inner cavity of a pneumatic tyre (). The following steps are provided: eliminating an excess end () of a strip () of sound-absorbing material (); progressively separating a protective lining () from an adhesive layer () of the strip () as the strip () of sound-absorbing material () is applied to the inner cavity of the tyre; implementing by means of the strip () a separation opening () that starts from an opposite side of the protective lining () and ends at the protective lining () which remains intact, and separating the excess end () from the remaining part of the strip () of sound-absorbing material (); and pulling the excess end () in relation to the remaining part of the strip such as to separate the protective lining () from the strip ().

A system is provided for applying a sealing agent to an surface of an internal cavity of a pneumatic tire. The system provides for detecting the weight of the pneumatic tire before and after the application of the sealing agent to the surface, calculating the difference between the quantity of sealing agent applied to the surface and a reference quantity of sealing agent; storing the difference within a short-term memory buffer and a long-term memory buffer; determining a short-term compensation factor and a long-term compensation factor and calculating a correction factor using alternatively the short-term compensation factor or else the long-term compensation factor; and using the correction factor to actuate an applicator device during the subsequent step of applying the strip of sealing agent to the surface.

Method and system for applying a sealing agent to the surface of an internal cavity of a pneumatic tire

A method and system for applying a sealing agent to a surface () of an inner cavity () of a pneumatic tyre; the method provides for detecting the weight of the pneumatic tyre () before and after the application of the sealing agent to the surface (); calculating the difference between the quantity of sealing agent applied to the surface () and a reference quantity of sealing agent, storing said difference within a short-term memory buffer () and a long-term memory buffer (); determining a short-term compensation factor (K) and a long-term compensation factor (K) and calculating a correction factor (K) using alternately the short-term compensation factor (K) or else the long-term compensation factor (K); and using said correction factor (K) to actuate an applicator device () during the subsequent step of applying the strip of sealing agent to the surface ().

Use of compounds of molecular formula (I) as curing activators of mixes having a cross-linkable unsaturated-chain polymer base: ([RRRNR(NRRR)n])y(n+1)X(I); where: X is an anionic atom or group; R, Rand R, which may be the same or different, are each CH, where m ranges between 1 and 3, or CHCHCHor CHCHCH; R, Rand R, which may be the same or different, are each CHCHCHor CHCHCH; n is 0 or 1; y is 1 when n is 1; y is 1 or 2 when n is 0; Ris an aliphatic group C-Cwhen n is 0; and is an aliphatic group C-Cwhen n is 1; when n is 0, at least one of R, R, Rand Rcomprises a double bond.

Curing activators

A method and device whereby green tire components are on-line controlled as to quality, dimensions and structure by means of electric resistance measurements.

Method and device for on-line controlling green tire manufacturing components

An antistatic tire having a tread made from a first mix (MP ) and having two annular shoulders and a peripheral rolling surface, two opposite annular portions of the rolling surface being defined by outer annular surfaces of the shoulders. Each shoulder is made from a second mix (MPC), which is electrically conducting, and which, under low strain, has substantially the same rigidity as the first mix (MP ), and, under high strain, has a greater rigidity than the first mix (MP ). In a second embodiment, an electrically conducting element is inserted inside the tread. The conducting element and the shoulders both being made of an electrically conducting third mix, which, under low strain and in the cured state, has the same mechanical characteristics as the first mix in the cured state, and, under high strain, has the same mechanical characteristics as the second mix in the cured state.

Antistatic tire

An antistatic tire and relative production method, whereby a portion of a tread made of an electrically insulating mix is hollowed out and filled with a cement (C) in the form of a carbon black mix in a volatile liquid; the carbon black mix being left inside the hollow portion when the volatile liquid evaporates, and defining inside the tread at least one conducting body communicating with a rolling surface of the tire.

Growing community of inventors

Rome, Italy

Paolo Straffi