Assembly formed of a tire and a sealing piece and manufacturing process

A heavy vehicle tire assembly, comprising a tire (P) without an inner tube, provided with two beads and bead seats and intended to be mounted on a mounting rim (J) comprising a rim base extended axially by rim seats which in turn are extended radially towards the outside by flanges (R), and a rubber sealing piece (E) arranged between said rim and said tire, the diameters (DP) of the tire bead seats being greater than the corresponding diameters (DJ) of the rim seats, this tire (P) being provided integrally with the sealing piece (E) formed of three axially adjacent parts comprising two lateral parts and a central part which are integral with each other, the central part, made of material impermeable to the inflation gases, being placed axially between the beads of the tire so that the entire central part is located axially within a region defined between two planes spaced apart along the rotation axis of the tire assembly and oriented perpendicular to the axis, each plane intersecting the sealing piece at a respective location between each lateral part and the central part, this central part being extended axially beneath the beads of the tire by the lateral parts which are integral with respective beads and of an axial width substantially equal to the axial width of the respective bead seat, this tire (P) being characterized in that the sealing piece (E) comprises two location means each defining and allowing location of a zone of separation between a respective lateral part and the central part of the sealing piece (E) in order to facilitate separation of the central part from the lateral parts without damaging the beads of the tire, each location means disposed radially inwardly in relation to a respective bead, each bead including a generally radial wall facing axially outwardly, an axially outer end of each edge piece terminating adjacent a radially inner end of the generally radial wall of the respective bead.