Apparatus for making pneumatic tires torically with an annular guide assembly

摘要

A pneumatic tire building machine with a rotatable building drum adapted for forming thereon a tire carcass of rubberized plies and for expanding the formed carcass to a toric shape. A transfer mechanism positions a separately formed tread and belt assembly substantially concentrically around and spaced from the tire carcass disposed on the building drum. Annular guide means with rolling surfaces are also positioned substantially concentrically around and spaced from the tire carcass disposed on the building drum. When the tire carcass is expanded to a toric shape, the carcass contacts the guide means in rolling engagement and is guided to mate in precision alignment with the tread and belt assembly.