Method of controlling a phase of moulding an annular fixing structure and a tyre including an annular fixing structure

Abstract

A tyre includes a toroidal ring-shaped carcass structure with at least one carcass ply associated with at least one annular fixing structure, as well as a tread band positioned radially externally with respect to the carcass structure. The annular fixing structure includes a radially inner and axially inner surface and a radially inner and axially outer surface, the surfaces being substantially opposed to each other. The radially inner and axially inner surface and radially inner and axially outer surface are shaped by successive application of a first squeezing pressure produced by a first surface and a second surface of a curing mould that are brought towards each other, as well as a second squeezing pressure produced by bringing the first and second surfaces closer together. The radially inner and axially inner surface and/or radially inner axially outer surface have a shape that includes air evacuation channels.

1 - 28 . (canceled) 
     
     
         29 . A tyre comprising:
 a toroidal ring-shaped carcass structure, comprising at least one carcass ply associated with at least one annular fixing structure; and   a tread band positioned radially externally with respect to said carcass structure,   wherein said annular fixing structure comprises a radially inner and axially inner surface and a radially inner and axially outer surface, the surfaces being substantially opposed to each other, said radially inner and axially inner surface and said radially inner and axially outer surface having been shaped by successive application thereto of:   a first squeezing pressure produced by using a first surface and a second surface of a curing mould which are brought towards each other; and   a second squeezing pressure produced by using said first and said second surfaces which are brought closer together, and   wherein said radially inner and axially inner surface and/or said radially inner and axially outer surface have a shape including air evacuation channels.   
     
     
         30 . The tyre according to  claim 29 , wherein said radially inner and axially inner surface and said radially inner and axially outer surface have been shaped by application thereto, after said second squeezing pressure, of a third squeezing pressure produced by bringing said first and said second surfaces still closer to each other. 
     
     
         31 . The tyre according to  claim 30 , wherein shaping of said radially inner and axially inner surface and of said radially inner and axially outer surface is carried out by squeezing a portion of said radially inner and axially inner surface against said first surface of the curing mould at said first squeezing pressure, and by squeezing a portion of said radially inner and axially outer surface against said second surface of the curing mould. 
     
     
         32 . The tyre according to  claim 31 , wherein the shaping of said radially inner and axially inner surface and of said radially inner and axially outer surface is carried out by squeezing said portion of said radially inner and axially inner surface against said first surface of the curing mould at said second squeezing pressure, and by squeezing said portion of said radially inner and axially outer surface against said second surface of the curing mould. 
     
     
         33 . The tyre according to  claim 31 , wherein the distance between a radially outermost point and a radially innermost point of said radially inner and axially inner surface portion projected in a circumferential plane is in a range from approximately 5 mm to approximately 40 mm. 
     
     
         34 . The tyre according to  claim 33 , wherein said distance is in a range from approximately 7 mm to approximately 20 mm. 
     
     
         35 . The tyre according to  claim 34 , wherein said portion of said radially inner and axially inner surface and/or said portion of said radially inner and axially outer surface has a substantially flat shape. 
     
     
         36 . The tyre according to  claim 34 , wherein said portion of said radially inner and axially inner surface and/or said portion of said radially inner and axially outer surface has an undulating shape. 
     
     
         37 . The tyre according to  claim 34 , wherein said portion of said radially inner and axially inner surface and/or said portion of said radially inner and axially outer surface has a shape including a plurality of lobes.