Patent attributes
To effectively restrict occurrence of radially extending grooves in tire sidewall portions, turn-up portions (N) of a tire structure member (K) are turned up around the beads (B) by synchronously moving turn-up arms (66) axially inward by a moving means (75), with turn-up rollers (70) maintained in contact with the turn-up portion (N), and simultaneously, by synchronously swinging the turn-up arms (66) radially outward by a swinging means (76). The contact pressure of the turn-up rollers (70) applied to the turn-up portion (N) can thus be easily adjusted to an optimum value, with the result that impressions (grooves) produced in the outer surface of the turn-up portion (N) (which becomes part of the tire sidewall portion after being turned up) can be kept as shallow as possible.
