US 11,718,054 B2
Apparatus for building tyres for vehicle wheels
Gianni Mancini, Milan (IT); Gaetano Lo Presti, Milan (IT); and Maurizio Marchini, Milan (IT)
Assigned to PIRELLI TYRE S.P.A., Milan (IT)
Filed by PIRELLI TYRE S.P.A., Milan (IT)
Filed on Oct. 30, 2020, as Appl. No. 17/85,943.
Application 17/085,943 is a continuation of application No. 14/907,096, granted, now 10,857,749, previously published as PCT/IB2014/062737, filed on Jun. 30, 2014.
Claims priority of application No. MI2013A001299 (IT), filed on Aug. 1, 2013.
Prior Publication US 2021/0046720 A1, Feb. 18, 2021
Int. Cl. B29D 30/24 (2006.01); B29D 30/30 (2006.01); B60C 9/08 (2006.01); B29D 30/20 (2006.01); B29D 30/06 (2006.01); B60C 9/04 (2006.01); B29D 30/08 (2006.01); B29K 105/00 (2006.01)
CPC B29D 30/305 (2013.01) [B29D 30/0681 (2013.01); B29D 30/20 (2013.01); B29D 30/245 (2013.01); B29D 30/246 (2013.01); B29D 30/3014 (2013.01); B29D 30/3042 (2013.01); B29D 30/3057 (2013.01); B60C 9/08 (2013.01); B29D 2030/0682 (2013.01); B29D 2030/086 (2013.01); B29D 2030/3078 (2013.01); B29D 2030/3085 (2013.01); B29K 2105/256 (2013.01); B60C 2009/0408 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus for building tyres for vehicle wheels, comprising:
a building drum comprising a central section axially interposed between two half-parts to define a substantially cylindrical deposition surface, the two half-parts being distinct from and engageable with the central section; and
first forming devices configured for forming a carcass sleeve on the building drum,
wherein said first forming devices comprise laying devices configured for laying circumferentially consecutive strip-like elements around a circumferential extension of the deposition surface of the building drum,
wherein said deposition surface of the building drum comprises:
two axially external terminal portions defined by the two half-parts; and
an intermediate portion defined by the central section, extending across an axial symmetry plane of the deposition surface and axially interposed between the two terminal portions, the central section being in a radially inner position with respect to the two terminal portions,
the two half-parts having respective frustoconical zones that are tapered from respective axially outer edges defining a maximum diameter of the deposition surface, towards respective axially inner edges of the half-parts overlapping with the central section,
wherein the intermediate portion defines an application diameter of the deposition surface at said axial symmetry plane, the two terminal portions defining along their entire extension a diameter of the deposition surface that is greater than the application diameter.