Pirelli Tyre S.p.a.

Pirelli Limited

Mario Mariani

Pierangelo Misani

Luca Bruschelli

Andrea Schiavolin

Silvio Montanari

Alessio Casali

Maurizio Marchini

Davide Lupo Conti

Christian De Col

Luca Giannini

Giuliano Bonaccorsi

Oliver Haupt

Sandro Gallo

Francesco Gagliardi

Guido Luigi Daghini

Simone Agresti

Aline Ringis Pin

Matteo Torchiana

Paolo Brivio

Davide Dall'abaco

Fabrizio Cristofani

Barbara Rampana

Lisa Grassi

Omar Ballabio

Roberto Marangon

Misani Pierangelo

Andrea Trombin

Stefania Masciullo

Luca Miragliotta

Stefano Tresoldi

Vinicius Pecorari Coelho

Rocco Parente

Roberta Giambelli

Angela Lostritto

Mirko Giovanni Perego

Alessandro Monzani

Motorcycle tire

Tread band portion for a motorcycle tire

A motorcycle tyre () has a tread band () comprising a plurality of grooves that form at least part of a tread pattern including a module (T) replicated along a circumferential direction and having a predetermined circumferential length (C). The module (T) comprises a pair of circumferential grooves () arranged on opposite sides with respect to the equatorial plane (X-X) of the tyre (). Such circumferential grooves () extend along the circumferential direction for at least part of said predetermined circumferential length (C) and define between them a central annular portion (A) of tread band () having a void to solid ratio substantially equal to zero and a predetermined axial width (A). The module (T) further comprises a pair of first lateral annular portions (B) arranged on opposite sides with respect to the equatorial plane (X-X) in an axially outer position with respect to said pair of circumferential grooves () and each having a void to solid ratio substantially equal to zero, and a plurality of transversal grooves () arranged on opposite sides with respect to the equatorial plane (X-X), in an axially outer position with respect to said pair of first lateral annular portions (B). The tyre () has a curvature ratio lower than about 0.4.

Motorcycles tyre

A motorcycle tyre has a tread band () comprising a plurality of grooves that form a tread pattern including a module (T) replicated along a circumferential direction of the tyre () and having a predetermined circumferential length (C). The module (T) comprises a pair of circumferential grooves () arranged on opposite sides with respect to the equatorial plane (X-X) of the tyre (). Such circumferential grooves () extend along the circumferential direction of the tyre () for only part of said predetermined circumferential length (C) and define between them a central portion (A) of tread band () having a void to solid ratio substantially equal to zero and a predetermined axial width (A). The module (T) further comprises a plurality of transversal grooves () arranged on opposite sides with respect to the equatorial plane (X-X) at a distance from said equatorial plane (X-X) greater than that of said circumferential grooves () and a pair of first lateral annular portions (B) axially arranged between said circumferential grooves () and said plurality of pairs of transversal grooves (), each of said first lateral annular portions (B) comprising, in a position axially adjacent to the respective circumferential groove (), a respective part (B) of tread band having a circumferential length at least equal to that of said circumferential grooves () and a void to solid ratio substantially equal to zero. The tyre () has a curvature ratio lower than about 0.32.

Motorcycle tires

A carcass sleeve is situated in a radially external position with respect to a toroidal forming drum, arranged in a first radially contracted operative condition. The carcass sleeve is shaped according to a toroidal configuration while the forming drum is positioned inside the carcass sleeve. During shaping of the carcass sleeve, the forming drum is radially expanded up to a second radially expanded operative condition. Upon completed shaping, the carcass sleeve is coupled to the forming drum in the second operative condition. The forming drum, coupled to the shaped carcass sleeve, is arranged in proximity to at least one device for building at least one belt layer at a radially external position relative to the shaped carcass sleeve.

Method for building tyres

A process and an apparatus for building tyres, wherein, in the process, a carcass sleeve including at least one carcass ply and a pair of annular anchoring structures is transferred to a shaping drum including flange elements that are each engageable with one of said annular anchoring structures. The carcass sleeve is shaped according to a toroidal configuration. Before shaping, annular grip elements respectively carried by the flange elements are radially expanded, each inside one of the annular anchoring structures, in order to engage the carcass sleeve. The annular anchoring structures are moved axially apart from each other before engaging the carcass sleeve by the annular grip elements.

Process and apparatus for building tyres

Growing community of inventors

Milan, Italy

Mario Mariani