Abstract: A process for assembling a tire, including producing a crown of said tire on a drum of variable diameter of a generally cylindrical form.

Abstract: Method of laying a tire belt ply on a form, using one or two transporters each having gripping assemblies, for gripping and moving the gripping sectors situated at the two longitudinal ends of a belt ply. The front and rear edges are aligned, after having determined the angular geometry of the ply edges by means of a suitable device, by independently moving at least one gripping sector of each of the front and rear areas. This method makes it possible to align edges having high curvatures and to lay a belt ply on a curved form.

Abstract: A process for assembling a tire, including producing a crown of said tire on a drum of variable diameter of a generally cylindrical form.

Abstract: Method of laying a tire belt ply on a form, using one or two transporters each having gripping assemblies, for gripping and moving the gripping sectors situated at the two longitudinal ends of a belt ply. The front and rear edges are aligned, after having determined the angular geometry of the ply edges by means of a suitable device, by independently moving at least one gripping sector of each of the front and rear areas. This method makes it possible to align edges having high curvatures and to lay a belt ply on a curved form.

Abstract: Method of laying a tire belt ply on a form, using one or two transporters each having gripping assemblies, for gripping and moving the gripping sectors situated at the two longitudinal ends of a belt ply. The front and rear edges are aligned, after having determined the angular geometry of the ply edges by means of a suitable device, by independently moving at least one gripping sector of each of the front and rear areas. This method makes it possible to align edges having high curvatures and to lay a belt ply on a curved form.

Abstract: A drum (1) of variable diameter of generally cylindrical form, intended for the assembly of the belt plies and profiled elements constituting the crown of a tyre, comprising a set of first holding means (3) arranged circumferentially at the equator of the drum and suitable for making that part of the ply arranged level with these means adhere to the surface of the drum, and characterised in that it comprises a set of second holding means (4) suitable for making that part of the ply placed level with said second means alternately adhere to or slide freely on the drum, and which are arranged circumferentially and axially on either side of said equator over the entire surface of said drum (1).

Abstract: A shaping drum (T) for a tire carcass (C), comprising two side plates (4, 4?), mounted on a shaft (1) of axis XX? and moving axially on said shaft, said side plates comprising circumferential receiving grooves (6, 6?) intended to hold the heels of the tire to be shaped while forming an airtight contact with said heels, and in which the shaping of the tire takes place by increasing the air pressure within the volume (V) defined by the side plates and by the inner surface of the tire (C), and by bringing together the side plates (4, 4?), wherein during the shaping, at least one of the side plates (4, 4?) is driven in rotation about said axis XX? relative to the other side plate.

Abstract: Method of laying a tire belt ply on a form, using one or two transporters each having gripping assemblies, for gripping and moving the gripping sectors situated at the two longitudinal ends of a belt ply. The front and rear edges are aligned, after having determined the angular geometry of the ply edges by means of a suitable device, by independently moving at least one gripping sector of each of the front and rear areas. This method makes it possible to align edges having high curvatures and to lay a belt ply on a curved form.

Abstract: An assembly drum for tire manufacture includes a body (2) mounted on a central shaft (6) and having a generally cylindrical surface (3), for receiving the products to be assembled to make up a tire, as well as axially spaced shoulders (4, 5). The shoulders (4, 5) are movable axially and radially between a retracted position of the drum (1), in which the reception surface (3) has a minimum diameter and axial length, and a working position of the drum, in which the diameter and axial length of the reception surface (3) are very much greater than those in the retracted position. The shoulders respectively carry means (15, 16) for holding the products making up the tire in contact with the shoulders.