Patent ID: 6059910
Filing Date: 2000-05-09
Classification: B29C,B29D

Abstract:
A method of producing a toroidal carcass (1) for a road vehicle tire; the carcass (1) being a woven carcass comprising two annular beads (2), and a reticulated structure (4) defined by at least one cord (5) wound about the beads (2) and connecting the beads (2) to each other; and the method comprising the steps of:positioning said two beads (2) coaxially with and at a given distance from each other;positioning a removable auxiliary annular element (8) radially outwards of the two beads (2) and centered axially with respect to the two beads (2), so as to define, with the two beads (2), a toroidal frame (7) having an axis (14) and two annular openings (11) coaxial with said axis (14); andfeeding a spool (16), housing a given length of said cord (5), about the frame (7) by means of a winding device (15) to wind the cord (5) about the frame (7) along a spiral path (P) comprising a number of turns (6), each extending about the beads (2) and the annular element (8) and through said openings (11);characterized in that said auxiliary annular element (8) comprises at least one movable sector (9a) along which an initial portion of said path (P) extends; the method comprising the further step, prior to winding said cord (5) completely along the whole of said path (P), of moving said movable sector (9a) from a first operating position, in which the movable sector (9a) is aligned with a remaining portion (9b) of said auxiliary annular element (8), to a second operating position, in which the movable sector (9a) at least overlaps said remaining portion (9b) of said auxiliary annular element (8) to provide an opening for the passage of said spool during the last turns of the carcass.